summaryrefslogtreecommitdiff
path: root/ace/OS.cpp
blob: 7d76f0b5ba7f7d5cd2d2ed404af02b00fb682534 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
// $Id$

// OS.cpp
#define ACE_BUILD_DLL
#include "ace/OS.h"
#include "ace/SString.h"
#include "ace/Sched_Params.h"

#if defined (ACE_WIN32)
#include "ace/ARGV.h"
#endif /* ACE_WIN32 */

// Perhaps we should *always* include ace/OS.i in order to make sure
// we can always link against the OS symbols?
#if !defined (ACE_HAS_INLINED_OSCALLS)
#include "ace/OS.i"
#endif /* ACE_HAS_INLINED_OS_CALLS */

#include "ace/Synch.h"
#include "ace/Containers.h"

#if defined (ACE_MT_SAFE)

// This is lock defines a monitor that is shared by all threads
// calling certain ACE_OS methods.
static ACE_Thread_Mutex ace_os_monitor_lock;

#if defined (ACE_LACKS_NETDB_REENTRANT_FUNCTIONS)
int 
ACE_OS::netdb_acquire (void)
{
  return ace_os_monitor_lock.acquire ();
}

int 
ACE_OS::netdb_release (void)
{
  return ace_os_monitor_lock.release ();
}
#endif /* defined (ACE_LACKS_NETDB_REENTRANT_FUNCTIONS) */
#endif /* defined (ACE_MT_SAFE) */

// Static constant representing `zero-time'.
const ACE_Time_Value ACE_Time_Value::zero;

ACE_ALLOC_HOOK_DEFINE(ACE_Time_Value)

// Initializes the ACE_Time_Value object from a timeval.

#if defined(ACE_WIN32)
//  Initializes the ACE_Time_Value object from a Win32 FILETIME

ACE_Time_Value::ACE_Time_Value (const FILETIME &file_time)
{
  // ACE_TRACE ("ACE_Time_Value::ACE_Time_Value");
  this->set (file_time);
}

void ACE_Time_Value::set (const FILETIME &file_time)
{
  //  Initializes the ACE_Time_Value object from a Win32 FILETIME 
  ACE_QWORD _100ns = ACE_MAKE_QWORD (file_time.dwLowDateTime, 
				     file_time.dwHighDateTime);
  // Convert 100ns units to seconds;
  this->tv_.tv_sec = long (_100ns / (10000 * 1000));
  // Convert remainder to microseconds;
  this->tv_.tv_usec = long ((_100ns - (this->tv_.tv_sec * (10000 * 1000))) / 10);
}

// Returns the value of the object as a Win32 FILETIME.

ACE_Time_Value::operator FILETIME () const
{
  // ACE_TRACE ("ACE_Time_Value::operator FILETIME");
  ACE_QWORD _100ns = ((ACE_QWORD) this->tv_.tv_sec * (1000 * 1000) + this->tv_.tv_usec) * 10;
  FILETIME file_time;
  file_time.dwLowDateTime = ACE_LOW_DWORD (_100ns);
  file_time.dwHighDateTime = ACE_HIGH_DWORD (_100ns);
  return file_time;
}

#endif

void
ACE_Time_Value::dump (void) const
{
  // ACE_TRACE ("ACE_Time_Value::dump");
#if 0
  if (tv.usec () < 0 || tv.sec () < 0)
    stream << "-";

  stream << dec << abs (int (tv.sec ())) << "."
//	 << setw (6) << setfill ('0') 
	 << dec << abs (int (tv.usec ()));
// I assume
   inline int abs(int d) { return (d>0)?d:-d; }
   is defined somewhere */
#endif /* 0 */
}

void
ACE_Time_Value::normalize (void)
{
  // ACE_TRACE ("ACE_Time_Value::normalize");
  // New code from Hans Rohnert...

  if (this->tv_.tv_usec >= ONE_SECOND)
    {
      do
	{ 
	  this->tv_.tv_sec++;
	  this->tv_.tv_usec -= ONE_SECOND;
	}
      while (this->tv_.tv_usec >= ONE_SECOND);
    }
  else if (this->tv_.tv_usec <= -ONE_SECOND)
    {
      do
	{ 
	  this->tv_.tv_sec--;
	  this->tv_.tv_usec += ONE_SECOND;
	}
      while (this->tv_.tv_usec <= -ONE_SECOND);
    }
 
  if (this->tv_.tv_sec >= 1 && this->tv_.tv_usec < 0)
    {
      this->tv_.tv_sec--;
      this->tv_.tv_usec += ONE_SECOND;
    }
  else if (this->tv_.tv_sec < 0 && this->tv_.tv_usec > 0)
    {
      this->tv_.tv_sec++;
      this->tv_.tv_usec -= ONE_SECOND;
    }
}

int
ACE_Countdown_Time::start (void)
{
  this->start_time_ = ACE_OS::gettimeofday ();
  this->stopped_ = 0;
  return 0;
}

int
ACE_Countdown_Time::update (void)
{
  return (this->stop () == 0) && this->start ();
}

int
ACE_Countdown_Time::stop (void)
{
  if (this->max_wait_time_ != 0 && this->stopped_ == 0)
    {
      ACE_Time_Value elapsed_time = 
	ACE_OS::gettimeofday () - this->start_time_;

      if (*this->max_wait_time_ > elapsed_time)
	*this->max_wait_time_ -= elapsed_time;
      else
	{
	  // Used all of timeout.
	  *this->max_wait_time_ = ACE_Time_Value::zero; 
	  errno = ETIME;
	}
      this->stopped_ = 1;
    }
  return 0;
}

ACE_Countdown_Time::ACE_Countdown_Time (ACE_Time_Value *max_wait_time)
  : max_wait_time_ (max_wait_time),
    stopped_ (0)
{
  if (max_wait_time != 0)
    this->start ();
}

ACE_Countdown_Time::~ACE_Countdown_Time (void)
{
  this->stop ();
}

#if defined (ACE_HAS_PENTIUM) && defined (__GNUC__)
ACE_hrtime_t 
ACE_OS::gethrtime (void)
{
  // ACE_TRACE ("ACE_OS::gethrtime");

  // See comments for ACE_WIN32 version of ACE_OS::gethrtime () in OS.i.
  //
  // This function can't be inline because it depends on the location
  // of the following variables on the stack.
  unsigned long least, most;

  asm ("rdtsc");
  asm ("movl %eax, -4(%ebp)");  // least
  asm ("movl %edx, -8(%ebp)");  // most

  return (unsigned long long) most << 32  |  least;
}
#endif /* ACE_HAS_PENTIUM && __GNUC__ */

#if defined (ACE_HAS_POWERPC) && defined (ghs)
void
ACE_OS::readPPCTimeBase (u_long &most, u_long &least)
{
  // ACE_TRACE ("ACE_OS::readPPCTimeBase");

  // This function can't be inline because it depends on the arguments
  // being in particular registers (r3 and r4), in conformance with the
  // EABI standard.  It would be nice if we knew how to put the variable
  // names directly into the assembler instructions . . .
  asm("aclock:");
  asm("mftb  r5,TBU");
  asm("mftb  r6,TBL");
  asm("mftb  r7,TBU");
  asm("cmpw  r5,r7");
  asm("bne   aclock");

  asm("stw r5, 0(r3)");
  asm("stw r6, 0(r4)");
}
#endif /* ACE_HAS_POWERPC && ghs */

#if defined (ACE_WIN32) || defined (VXWORKS)
// Don't inline on those platforms because this function contains
// string literals, and some compilers, e.g., g++, don't handle those
// efficiently in unused inline functions.
int 
ACE_OS::uname (struct utsname *name)
{
  // ACE_TRACE ("ACE_OS::uname");
#if defined (ACE_WIN32)
  size_t maxnamelen = sizeof name->nodename;
  ::strcpy (name->sysname, "Win32");
  // Any ideas what these should be?
  ::strcpy (name->release, "???");
  ::strcpy (name->version, "???");
  ::strcpy (name->machine, "???");

  return ACE_OS::hostname (name->nodename, maxnamelen);
#elif defined (VXWORKS)
  size_t maxnamelen = sizeof name->nodename;
  ::strcpy (name->sysname, "VxWorks");
  ::strcpy (name->release, "???");
  ::strcpy (name->version, "???");
  ::strcpy (name->machine, "???");

  return ACE_OS::hostname (name->nodename, maxnamelen);
#endif /* ACE_WIN32 */
}
#endif /* ACE_WIN32 || VXWORKS */


struct hostent *
ACE_OS::gethostbyname (const char *name)
{
  // ACE_TRACE ("ACE_OS::gethostbyname");
#if defined (VXWORKS)
  // not thread safe!
  static hostent ret;
  static int first_addr = ::hostGetByName ((char *) name);
  static char *hostaddr[2];

  if (first_addr == -1)
    return 0;

  hostaddr[0] = (char *) &first_addr;
  hostaddr[1] = 0;

  // might not be official: just echo input arg.
  ret.h_name = (char *) name;  
  ret.h_addrtype = AF_INET;
  ret.h_length = 4;  // VxWorks 5.2/3 doesn't define IP_ADDR_LEN;
  ret.h_addr_list = hostaddr;

  return &ret;
#elif defined (ACE_HAS_NONCONST_GETBY)
  ACE_SOCKCALL_RETURN (::gethostbyname ((char *) name), struct hostent *, 0);
#else
  ACE_SOCKCALL_RETURN (::gethostbyname (name), struct hostent *, 0); 
#endif /* ACE_HAS_NONCONST_GETBY */
}

#if defined (VXWORKS)
// not inline because it has the static char array
char *
ACE_OS::inet_ntoa (const struct in_addr addr)
{
  // ACE_TRACE ("ACE_OS::inet_ntoa");

  // the following storage is not thread-specific!
  static char buf[32];
  // assumes that addr is already in network byte order
  ACE_OS::sprintf (buf, "%d.%d.%d.%d", addr.s_addr / (256*256*256) & 255,
		   addr.s_addr / (256*256) & 255,
		   addr.s_addr / 256 & 255,
		   addr.s_addr & 255);
  return buf;
}
#endif /* VXWORKS */ 

void 
ACE_OS::ace_flock_t::dump (void) const
{
// ACE_TRACE ("ACE_OS::ace_flock_t::dump");

  ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
  ACE_DEBUG ((LM_DEBUG, "handle_ = %u", this->handle_));
#if defined (ACE_WIN32)
  ACE_DEBUG ((LM_DEBUG, "\nInternal = %d", this->overlapped_.Internal));
  ACE_DEBUG ((LM_DEBUG, "\nInternalHigh = %d", this->overlapped_.InternalHigh));
  ACE_DEBUG ((LM_DEBUG, "\nOffsetHigh = %d", this->overlapped_.OffsetHigh));
  ACE_DEBUG ((LM_DEBUG, "\nhEvent = %d", this->overlapped_.hEvent));
#elif !defined (CHORUS)
  ACE_DEBUG ((LM_DEBUG, "\nl_whence = %d", this->lock_.l_whence));
  ACE_DEBUG ((LM_DEBUG, "\nl_start = %d", this->lock_.l_start));
  ACE_DEBUG ((LM_DEBUG, "\nl_len = %d", this->lock_.l_len));
  ACE_DEBUG ((LM_DEBUG, "\nl_type = %d", this->lock_.l_type));
#endif /* ACE_WIN32 */
  ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
}

void
ACE_OS::mutex_lock_cleanup (void *mutex)
{
// ACE_TRACE ("ACE_OS::mutex_lock_cleanup");
#if defined (ACE_HAS_THREADS)
#if defined (ACE_HAS_DCETHREADS) || defined (ACE_HAS_PTHREADS)
  ACE_mutex_t *p_lock = (ACE_mutex_t *) mutex;
  ACE_OS::mutex_unlock (p_lock);
#else
  ACE_UNUSED_ARG (mutex);
#endif /* ACE_HAS_DCETHREADS */
#else
  ACE_UNUSED_ARG (mutex);
#endif /* ACE_HAS_THREADS */
}

// The following *printf functions aren't inline because
// they use varargs.
int 
ACE_OS::fprintf (FILE *fp, const char *format, ...)
{
  // ACE_TRACE ("ACE_OS::fprintf");
  int result = 0;
  va_list ap;
  va_start (ap, format);
  ACE_OSCALL (::vfprintf (fp, format, ap), int, -1, result);
  va_end (ap);
  return result;
}

int 
ACE_OS::printf (const char *format, ...)
{
  // ACE_TRACE ("ACE_OS::printf");
  int result;
  va_list ap;
  va_start (ap, format);
  ACE_OSCALL (::vprintf (format, ap), int, -1, result);
  va_end (ap);
  return result;
}

int 
ACE_OS::sprintf (char *buf, const char *format, ...)
{
  // ACE_TRACE ("ACE_OS::sprintf");
  int result;
  va_list ap;
  va_start (ap, format);
  ACE_OSCALL (ACE_SPRINTF_ADAPTER (::vsprintf (buf, format, ap)), int, -1, result);
  va_end (ap);
  return result;
}

#if defined (ACE_HAS_UNICODE)
#if defined (ACE_WIN32)

int 
ACE_OS::sprintf (wchar_t *buf, const wchar_t *format, ...)
{
  // ACE_TRACE ("ACE_OS::sprintf");
  int result;
  va_list ap;
  va_start (ap, format);
  ACE_OSCALL (::vswprintf (buf, format, ap), int, -1, result);
  va_end (ap);
  return result;
}

int 
ACE_OS::sprintf (wchar_t *buf, const char *format, ...)
{
  // ACE_TRACE ("ACE_OS::sprintf");
  const wchar_t *wide_format = ACE_WString (format).fast_rep ();
  int result;
  va_list ap;  
  va_start (ap, wide_format);
  ACE_OSCALL (::vswprintf (buf, wide_format, ap), int, -1, result);
  va_end (ap);
  return result;
}

#endif /* ACE_WIN32 */
#endif /* ACE_HAS_UNICODE */

int 
ACE_OS::execl (const char * /* path */, const char * /* arg0 */, ...)
{
  // ACE_TRACE ("ACE_OS::execl");
#if defined (ACE_WIN32) || defined (VXWORKS)
  ACE_NOTSUP_RETURN (-1);
#else
  ACE_NOTSUP_RETURN (-1);
  // Need to write this code.
  // ACE_OSCALL_RETURN (::execv (path, argv), int, -1);
#endif /* ACE_WIN32 */
}

int 
ACE_OS::execle (const char * /* path */, const char * /* arg0 */, ...)
{
  // ACE_TRACE ("ACE_OS::execle");
#if defined (ACE_WIN32) || defined (VXWORKS)
  ACE_NOTSUP_RETURN (-1);
#else
  ACE_NOTSUP_RETURN (-1);
  // Need to write this code.
  //  ACE_OSCALL_RETURN (::execve (path, argv, envp), int, -1);
#endif /* ACE_WIN32 */
}

int 
ACE_OS::execlp (const char * /* file */, const char * /* arg0 */, ...)
{
  // ACE_TRACE ("ACE_OS::execlp");
#if defined (ACE_WIN32) || defined (VXWORKS)
  ACE_NOTSUP_RETURN (-1);
#else
  ACE_NOTSUP_RETURN (-1);
  // Need to write this code.
  //  ACE_OSCALL_RETURN (::execvp (file, argv), int, -1);
#endif /* ACE_WIN32 */
}

#if defined (ACE_HAS_STHREADS)
#include /**/ <sys/rtpriocntl.h>
#include /**/ <sys/tspriocntl.h>
#endif /* ACE_HAS_STHREADS */

int
ACE_OS::thr_setprio (const ACE_Sched_Priority prio)
{
  // Set the thread priority on the current thread.
  ACE_hthread_t my_thread_id;
  ACE_OS::thr_self (my_thread_id);
  return ACE_OS::thr_setprio (my_thread_id, prio);
}

int
ACE_OS::sched_params (const ACE_Sched_Params &sched_params)
{
  // ACE_TRACE ("ACE_OS::sched_params");
#if defined (ACE_HAS_STHREADS)
  // Set priority class, priority, and quantum of this LWP or process as
  // specified in sched_params.

  // Get the priority class ID and attributes.
  pcinfo_t pcinfo;
  ACE_OS::strcpy (pcinfo.pc_clname,
                  sched_params.policy() == ACE_SCHED_OTHER  ?  "TS"  :  "RT");
  // The following is just to avoid Purify warnings about unitialized
  // memory reads.
  ACE_OS::memset (pcinfo.pc_clinfo, 0, PC_CLINFOSZ);

  if (::priocntl (P_ALL /* ignored */,
                  P_MYID /* ignored */,
                  PC_GETCID,
                  (char *) &pcinfo) == -1)
    {
      return -1;
    }

  // OK, now we've got the class ID in pcinfo.pc_cid.  In addition,
  // the maximum configured real-time priority is in ((rtinfo_t *)
  // pcinfo.pc_clinfo)->rt_maxpri.

  pcparms_t pcparms;
  pcparms.pc_cid = pcinfo.pc_cid;

  if (sched_params.policy () == ACE_SCHED_OTHER  &&
      sched_params.quantum () == ACE_Time_Value::zero)
      // Solaris doesn't support non-zero quantums in time-sharing class:  use
      // real-time class instead.
    {
      tsparms_t tsparms;
      // Don't change ts_uprilim (user priority limit)
      tsparms.ts_uprilim = TS_NOCHANGE;
      tsparms.ts_upri = sched_params.priority ();

      // Package up the TS class ID and parameters for the ::priocntl ()
      // call.
      ACE_OS::memcpy (pcparms.pc_clparms, &tsparms, sizeof tsparms);
    }
  else if (sched_params.policy () == ACE_SCHED_FIFO  ||
           (sched_params.policy () == ACE_SCHED_RR &&
            sched_params.quantum () != ACE_Time_Value::zero))
           // must have non-zero quantum for RR, to make it meaningful
           // A zero quantum with FIFO has special significance:  it actually
           // means infinite time quantum, i.e., run-to-completion.
    {
      rtparms_t rtparms;
      rtparms.rt_pri = sched_params.priority ();

      if (sched_params.quantum () == ACE_Time_Value::zero)
        {
          // rtparms.rt_tqsecs is ignored with RT_TQINF
          rtparms.rt_tqnsecs = RT_TQINF;
        }
      else
        {
          rtparms.rt_tqsecs = (ulong) sched_params.quantum ().sec ();
          rtparms.rt_tqnsecs = sched_params.quantum ().usec () * 1000;
        }

      // Package up the RT class ID and parameters for the ::priocntl ()
      // call.
      ACE_OS::memcpy (pcparms.pc_clparms, &rtparms, sizeof rtparms);
    }
  else
    {
      errno = EINVAL;
      return -1;
    }

  if (::priocntl ((idtype_t) (sched_params.scope () == ACE_SCOPE_THREAD
                                ? ACE_SCOPE_PROCESS
                                : sched_params.scope ()), P_MYID, PC_SETPARMS,
                  (char *) &pcparms) < 0)
    {
      return ACE_OS::last_error ();
    }

  return 0;

#elif (defined (ACE_HAS_DCETHREADS) || defined (ACE_HAS_PTHREADS)) && !defined (ACE_LACKS_SETSCHED)
  if (sched_params.quantum () != ACE_Time_Value::zero)
    {
      // quantums not supported
      errno = EINVAL;
      return -1;
    }

  // Thanks to Thilo Kielmann <kielmann@informatik.uni-siegen.de> for
  // providing this code for 1003.1c PThreads.  Please note that this
  // has only been tested for POSIX 1003.1c threads, and may cause problems
  // with other PThreads flavors!

  int result;
  struct sched_param param;

  param.sched_priority = sched_params.priority ();

  if (sched_params.scope () == ACE_SCOPE_PROCESS)
    {
      ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::sched_setscheduler (
                                             0,    // this process
                                             sched_params.policy (),
                                             &param),
                                           result),
                         int, -1);
    }
  else if (sched_params.scope () == ACE_SCOPE_THREAD)
    {
      ACE_thread_t thr_id = ACE_OS::thr_self ();
  
      ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::pthread_setschedparam (
                                             thr_id,
                                             sched_params.policy (),
                                             &param),
                                           result),
                         int, -1);
    }
  else // sched_params.scope () == ACE_SCOPE_LWP, which isn't POSIX
    {
      errno = EINVAL;
      return -1;
    }

#elif defined (ACE_WIN32)

  if (sched_params.scope () != ACE_SCOPE_PROCESS  ||
      sched_params.quantum () != ACE_Time_Value::zero)
    {
      // Win32 only allows setting priority class (therefore, policy)
      // at the process level.  I don't know of a way to set the quantum.
      errno = EINVAL;
      return -1;
    }

  // Set the priority class of this process to the REALTIME process class
  // _if_ the policy is ACE_SCHED_FIFO.  Otherwise, set to NORMAL.
  if (! ::SetPriorityClass (
          ::GetCurrentProcess (),
          sched_params.policy () == ACE_SCHED_FIFO
            ?  REALTIME_PRIORITY_CLASS
            :  NORMAL_PRIORITY_CLASS))
    {
      return -1;
    }

  // Set the thread priority on the current thread.
  return ACE_OS::thr_setprio (sched_params.priority ());

#elif defined (VXWORKS)
  // There is only one class of priorities on VxWorks, and no
  // time quanta.  So, just set the current thread's priority.

  if (sched_params.policy () != ACE_SCHED_FIFO  ||
      sched_params.scope () != ACE_SCOPE_PROCESS  ||
      sched_params.quantum () != ACE_Time_Value::zero)
    {
      errno = EINVAL;
      return -1;
    }

  // Set the thread priority on the current thread.
  return ACE_OS::thr_setprio (sched_params.priority ());

#elif defined (CHORUS)
  int result;
  struct sched_param param;
  ACE_thread_t thr_id = ACE_OS::thr_self ();

  param.sched_priority = sched_params.priority ();

  ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::pthread_setschedparam (thr_id,
								sched_params.policy (),
								&param),
				       result),
		     int, -1);
#else
  ACE_UNUSED_ARG (sched_params);
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STHREADS */
}

// = Static initialization.

// This is necessary to deal with POSIX pthreads insanity.  This
// guarantees that we've got a "zero'd" thread id even when
// ACE_thread_t, ACE_hthread_t, and ACE_thread_key_t are implemented
// as structures...
ACE_thread_t ACE_OS::NULL_thread;
ACE_hthread_t ACE_OS::NULL_hthread;
ACE_thread_key_t ACE_OS::NULL_key;

ACE_OS::ACE_OS (void)
{
// ACE_TRACE ("ACE_OS::ACE_OS");
}

#if defined (ACE_WIN32)

// = Static initialization.

// Keeps track of whether we've initialized the WinSock DLL.
int ACE_OS::socket_initialized_;

// We need this to initialize the WinSock DLL.

BOOL WINAPI
DllMain (HINSTANCE, // DLL module handle
	 DWORD fdwReason, // Reason called
	 LPVOID) // Reserved
{
  switch (fdwReason)
    {
    case DLL_PROCESS_ATTACH:
      if (ACE_OS::socket_init (ACE_WSOCK_VERSION) != 0)
	return FALSE;
      break;

    case DLL_PROCESS_DETACH:
      if (ACE_OS::socket_fini () != 0)
        return FALSE;
      break;

    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
      break;

    default:
      ACE_ERROR_RETURN ((LM_ERROR, 
			 "Sock.DLL DllMain called with unknown fdwReason = %u\n.", 
			 fdwReason), FALSE);
      /* NOTREACHED */
    }

  return TRUE;
}

class ACE_TSS_Ref
  // = TITLE
  //     "Reference count" for thread-specific storage keys.  
  //
  // = DESCRIPTION
  //     Since the <ACE_Unbounded_Stack> doesn't allow duplicates, the
  //     "reference count" is the identify of the thread_id.
{
public:
  ACE_TSS_Ref (ACE_thread_t id);
  // Constructor

  ACE_TSS_Ref (void);
  // Default constructor

  int operator== (const ACE_TSS_Ref &);
  // Check for equality.

// private:

  ACE_thread_t tid_;
  // ID of thread using a specific key.
};

ACE_TSS_Ref::ACE_TSS_Ref (ACE_thread_t id)
  : tid_(id)
{
// ACE_TRACE ("ACE_TSS_Ref::ACE_TSS_Ref");
}

ACE_TSS_Ref::ACE_TSS_Ref (void)
{
// ACE_TRACE ("ACE_TSS_Ref::ACE_TSS_Ref");
}

// Check for equality.
int
ACE_TSS_Ref::operator== (const ACE_TSS_Ref &info)
{
// ACE_TRACE ("ACE_TSS_Ref::operator==");

  return this->tid_ == info.tid_;
}

typedef ACE_Unbounded_Stack<ACE_TSS_Ref> ACE_TSS_REF_TABLE;
typedef ACE_Unbounded_Stack_Iterator<ACE_TSS_Ref> ACE_TSS_REF_TABLE_ITERATOR;

class ACE_TSS_Info
  // = TITLE
  //     Thread Specific Key management.
  //
  // = DESCRIPTION
  //     This class maps a key to a "destructor."
{
public:
  ACE_TSS_Info (ACE_thread_key_t key, 
		void (*dest)(void *) = 0, 
		void *tss_inst = 0);
  // Constructor

  ACE_TSS_Info (void);
  // Default constructor

  int operator== (const ACE_TSS_Info &);
  // Check for equality.

  void dump (void);
  // Dump the state.

// private:
  ACE_thread_key_t key_;
  // Key to the thread-specific storage item.

  void (*destructor_)(void *);
  // "Destructor" that gets called when the item is finally released.

  void *tss_obj_;
  // Pointer to ACE_TSS<xxx> instance that has/will allocate the key.
 
  ACE_TSS_REF_TABLE ref_table_;
  // Table of thread IDs that are using this key.
};

ACE_TSS_Info::ACE_TSS_Info (ACE_thread_key_t key, 
			    void (*dest)(void *),
			    void *tss_inst)
  : key_ (key),
    destructor_ (dest),
    tss_obj_ (tss_inst)
{
// ACE_TRACE ("ACE_TSS_Info::ACE_TSS_Info");
}

ACE_TSS_Info::ACE_TSS_Info (void)
{
// ACE_TRACE ("ACE_TSS_Info::ACE_TSS_Info");
}

// Check for equality.
int 
ACE_TSS_Info::operator== (const ACE_TSS_Info &info)
{
// ACE_TRACE ("ACE_TSS_Info::operator==");

  return this->key_ == info.key_;
}

void 
ACE_TSS_Info::dump (void)
{
//  ACE_TRACE ("ACE_TSS_Info::dump");

  ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
  ACE_DEBUG ((LM_DEBUG, "key_ = %u", this->key_));
  ACE_DEBUG ((LM_DEBUG, "\ndestructor_ = %u", this->destructor_));
  ACE_DEBUG ((LM_DEBUG, "\ntss_obj_ = %u", this->tss_obj_));
  ACE_DEBUG ((LM_DEBUG, "\nref_table_.size_ = %u", this->ref_table_.size ()));

  ACE_TSS_Ref *tid_info = 0;

  ACE_DEBUG ((LM_DEBUG, "\nThread_usage_list\n[\n"));

  for (ACE_TSS_REF_TABLE_ITERATOR iter (this->ref_table_);
       iter.next (tid_info) != 0;
       iter.advance ())
    ACE_DEBUG ((LM_DEBUG, "\ntid_ = %d", tid_info->tid_));

  ACE_DEBUG ((LM_DEBUG, "\n]\n"));
  ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
}

// Create a set of <ACE_TSS_Info> objects that will reside
// within thread-specific storage.
typedef ACE_Unbounded_Stack<ACE_TSS_Info> ACE_TSS_TABLE;
typedef ACE_Unbounded_Stack_Iterator<ACE_TSS_Info> ACE_TSS_TABLE_ITERATOR;

class ACE_TSS_Cleanup
  // = TITLE
  //     Singleton that knows how to clean up all the thread-specific
  //     resources for Win32.
  // 
  // = DESCRIPTION
  //     All this nonsense is required since Win32 doesn't
  //     automatically cleanup thread-specific storage on thread exit,
  //     unlike real operating systems... ;-)
{
public:
  static ACE_TSS_Cleanup *instance (void);

  void exit (void *status);
  // Cleanup the thread-specific objects and exit with <status>.

  int insert (ACE_thread_key_t key, void (*destructor)(void *), void *inst);
  // Insert a <key, destructor> tuple into the table.

  int remove (ACE_thread_key_t key);
  // Remove a <key, destructor> tuple from the table.

  int detach (void *inst);
  // Detaches a tss_instance from its key.
 
  int detach (ACE_thread_key_t key, ACE_thread_t tid);
  // Detaches a thread from the key.
 
  int key_used (ACE_thread_key_t key);
  // Mark a key as being used by this thread.

protected:
  int mark_cleanup_i (void);
  // Mark a thread for actually performing cleanup.

  int check_cleanup_i (void);
  // Check if given thread is performing cleanup.

  int exit_cleanup_i (void);
  // Indicate that a thread has finished cleanup.

  void dump (void);

  ACE_TSS_Cleanup (void);
  // Ensure singleton.

private:
  ACE_TSS_TABLE table_;
  // Table of <ACE_TSS_Info>'s.

  ACE_TSS_REF_TABLE ref_table_;
  // Table of thread IDs that are performing cleanup activities.

  // = Static data.
  static ACE_TSS_Cleanup *instance_;
  // Pointer to the singleton instance.

public:
  static ACE_Thread_Mutex lock_;
  // Serialize initialization of <key_>.
};

// = Static object initialization.

// Pointer to the singleton instance.
ACE_TSS_Cleanup *ACE_TSS_Cleanup::instance_ = 0;

// Serialize initialization of <key_>.
ACE_Thread_Mutex ACE_TSS_Cleanup::lock_;

int 
ACE_TSS_Cleanup::mark_cleanup_i (void)
{
  return this->ref_table_.insert (ACE_TSS_Ref (ACE_OS::thr_self ()));
}
  
int 
ACE_TSS_Cleanup::check_cleanup_i (void)
{
  return this->ref_table_.find (ACE_TSS_Ref (ACE_OS::thr_self ()));
}

int 
ACE_TSS_Cleanup::exit_cleanup_i (void)
{
  return this->ref_table_.remove (ACE_TSS_Ref (ACE_OS::thr_self ()));
}

void 
ACE_TSS_Cleanup::exit (void *status)
{
// ACE_TRACE ("ACE_TSS_Cleanup::exit");

  ACE_thread_key_t key_arr[TLS_MINIMUM_AVAILABLE];
  int index = 0;

  ACE_TSS_Info *key_info = 0;
  ACE_TSS_Info info_arr[TLS_MINIMUM_AVAILABLE];
  int info_ix = 0;

  // While holding the lock, we only collect the ACE_TSS_Info objects
  // in an array without invoking the according destructors.

  {
    ACE_GUARD (ACE_Thread_Mutex, ace_mon, ACE_TSS_Cleanup::lock_);

    // Prevent recursive deletions

    if (this->check_cleanup_i () == 0) // Are we already performing cleanup?
      return;

    // If we can't insert our thread_id into the list, we will not be
    // able to detect recursive invocations for this thread. Therefore
    // we better risk memory and key leakages, resulting also in
    // missing close() calls as to be invoked recursively.

    if (this->mark_cleanup_i () != 0) // Insert our thread_id in list
      return;

    // Iterate through all the thread-specific items and free them all
    // up.

    for (ACE_TSS_TABLE_ITERATOR iter (this->table_);
	 iter.next (key_info) != 0;
	 iter.advance ())
      {
	void *tss_info = 0;

	int val = key_info->ref_table_.remove (ACE_TSS_Ref (ACE_OS::thr_self ()));

	if ((ACE_OS::thr_getspecific (key_info->key_, &tss_info) == 0)
	    && (key_info->destructor_) 
	    && tss_info)
          info_arr[info_ix++] = *key_info; // copy this information into array

 	if (key_info->ref_table_.size () == 0 
	    && key_info->tss_obj_ == 0)
	  key_arr[index++] = key_info->key_;
      }
   }

   // Now we have given up the ACE_TSS_Cleanup::lock_ and we start
   // invoking destructors.

   for (int i = 0; i < info_ix; i++)
     {
       void *tss_info = 0;

       ACE_OS::thr_getspecific (info_arr[i].key_, &tss_info);

       (*info_arr[i].destructor_)(tss_info);
     }

   // Acquiring ACE_TSS_Cleanup::lock_ to free TLS keys and remove
   // entries from ACE_TSS_Info table.
   {
    ACE_GUARD (ACE_Thread_Mutex, ace_mon, ACE_TSS_Cleanup::lock_);

    for (int i = 0; i < index; i++)
      {
	::TlsFree (key_arr[i]);
	this->table_.remove (ACE_TSS_Info (key_arr[i]));
      }

    this->exit_cleanup_i (); // remove thread id from reference list.
   }

#if defined (ACE_HAS_MFC)	
  // allow CWinThread-destructor to be invoked from AfxEndThread
  // _endthreadex will be called from AfxEndThread so don't exit the
  // thread now if we are running an MFC thread.
  CWinThread *pThread = ::AfxGetThread ();
  if (!pThread || pThread->m_nThreadID != ACE_OS::thr_self ())
#endif /* ACE_HAS_MFC */
    {
#if 0
      ACE_hthread_t thr;
      ACE_OS::thr_self (thr);
      if (thr)
	ACE_OS::close (thr);
#endif
      ::_endthreadex ((DWORD) status);
    }
#if 0 
  ::ExitThread ((DWORD) status);
#endif 

  /* NOTREACHED */
}

ACE_TSS_Cleanup::ACE_TSS_Cleanup (void)
{
// ACE_TRACE ("ACE_TSS_Cleanup::ACE_TSS_Cleanup");
}

ACE_TSS_Cleanup *
ACE_TSS_Cleanup::instance (void)
{
// ACE_TRACE ("ACE_TSS_Cleanup::instance");

  // Create and initialize thread-specific key.
  if (ACE_TSS_Cleanup::instance_ == 0)
    {
      // Insure that we are serialized!
      ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ACE_TSS_Cleanup::lock_, 0);

      // Now, use the Double-Checked Locking pattern to make sure we
      // only create the key once.
      if (instance_ == 0)
	ACE_NEW_RETURN (ACE_TSS_Cleanup::instance_, ACE_TSS_Cleanup, 0);
    }

  return ACE_TSS_Cleanup::instance_;
}

int 
ACE_TSS_Cleanup::insert (ACE_thread_key_t key, 
			 void (*destructor)(void *),
			 void *inst)
{
// ACE_TRACE ("ACE_TSS_Cleanup::insert");
  ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ACE_TSS_Cleanup::lock_, -1);

  return this->table_.insert (ACE_TSS_Info (key, destructor, inst));
}

int
ACE_TSS_Cleanup::remove (ACE_thread_key_t key)
{
// ACE_TRACE ("ACE_TSS_Cleanup::remove");
  ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ACE_TSS_Cleanup::lock_, -1);

  return this->table_.remove (ACE_TSS_Info (key));
}

int 
ACE_TSS_Cleanup::detach (void *inst)
{ 
  ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ACE_TSS_Cleanup::lock_, -1);
  
  ACE_TSS_Info *key_info = 0;
  int success = 0;
  int ref_cnt = 0;
  
  for (ACE_TSS_TABLE_ITERATOR iter (this->table_);
       iter.next (key_info) != 0;
       iter.advance ())
    {
      if (key_info->tss_obj_ == inst)
	{
	  key_info->tss_obj_ = 0;
	  ref_cnt = key_info->ref_table_.size ();
	  success = 1;
	  break;
	}
    }
  
  if (success == 0)
    return -1;
  else if (ref_cnt == 0)
    {
      ::TlsFree (key_info->key_);
      return this->table_.remove (ACE_TSS_Info (key_info->key_));
    }

  return 0;
}
  
int 
ACE_TSS_Cleanup::detach (ACE_thread_key_t key, ACE_thread_t tid)
{
	ACE_UNUSED_ARG(key);
	ACE_UNUSED_ARG(tid);

	return -1;
}
  
int 
ACE_TSS_Cleanup::key_used (ACE_thread_key_t key)
{
  ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ACE_TSS_Cleanup::lock_, -1);

  ACE_TSS_Info *key_info = 0;

  for (ACE_TSS_TABLE_ITERATOR iter (this->table_);
       iter.next (key_info) != 0;
       iter.advance ())
    if (key_info->key_ == key)
      return key_info->ref_table_.insert (ACE_TSS_Ref (ACE_OS::thr_self ()));

  return -1;
}
  
void 
ACE_TSS_Cleanup::dump (void)
{
  ACE_TSS_Info *key_info = 0;

  // Iterate through all the thread-specific items and dump them all.

  for (ACE_TSS_TABLE_ITERATOR iter (this->table_);
       iter.next (key_info) != 0;
       iter.advance ())
    key_info->dump ();
}

#endif /* WIN32 */

#if !defined (VXWORKS)
class ACE_Thread_Adapter
  // = TITLE
  //     Converts a C++ function into a function <ace_thread_adapter>
  //     function that can be called from a thread creation routine
  //     (e.g., pthread_create() or _beginthreadex()) that expects an
  //     extern "C" entry point.
  // 
  // = DESCRIPTION
  //     This is used below in <ACE_OS::thr_create> for Win32 and
  //     MVS. 
{
public:
  ACE_Thread_Adapter (ACE_THR_FUNC f, void *a);
  // Constructor.

  // private:
  // = Arguments to thread startup.
  ACE_THR_FUNC func_;
  // Thread startup function (C++ linkage).

  void *arg_;
  // Argument to thread startup function.

  ACE_Log_Msg *inherit_log_;
  // TSS log data of creating thread or NULL.
};

// Run the thread exit point.  This must be an extern "C" to make
// certain compilers happy...

extern "C" void *
ace_thread_adapter (void *args)
{
  // ACE_TRACE ("ace_thread_adapter");
  ACE_Thread_Adapter *thread_args = (ACE_Thread_Adapter *) args;

  ACE_THR_FUNC func = thread_args->func_;

  // Inherit the logging feature if the parent 
  // has got an ACE_Log_Msg.
  if( thread_args->inherit_log_ )
    {
	ACE_Log_Msg *inherit_log = thread_args->inherit_log_;
	ACE_Log_Msg *new_log = ACE_LOG_MSG;
	new_log->msg_ostream (inherit_log->msg_ostream ());
	new_log->priority_mask (inherit_log->priority_mask ());
	if (inherit_log->tracing_enabled ())
	  new_log->start_tracing ();
    }
  void *arg = thread_args->arg_;

  delete thread_args;

#if defined (ACE_WIN32)
  void *status;

  ACE_SEH_TRY {
    status = (*func) (arg);  // Call thread entry point.
  }
  ACE_SEH_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
    ACE_DEBUG ((LM_DEBUG, "(%t) Win32 structured exception exiting thread\n"));
    // Here's where we might want to provide a hook to report this...
    // As it stands now, we just catch all Win32 structured exceptions
    // so that we can make sure to clean up correctly when the thread
    // exits.
  }

  // If dropped off end, call destructors for thread-specific storage
  // and exit.
  ACE_TSS_Cleanup::instance ()->exit (status);
  /* NOTREACHED */
  return status;
#else
  return (void *) (*func) (arg);  // Call thread entry point.
#endif /* ACE_WIN32 */
}

ACE_Thread_Adapter::ACE_Thread_Adapter (ACE_THR_FUNC f, void *a)
  : func_(f), 
    arg_(a),
    inherit_log_ (NULL)
{
// ACE_TRACE ("Ace_Thread_Adapter::Ace_Thread_Adapter");
	if ( ACE_Log_Msg::exists() )
		inherit_log_ = ACE_LOG_MSG;
}
#endif /* VXWORKS */

int
ACE_OS::thr_create (ACE_THR_FUNC func,
		    void *args,
		    long flags,
		    ACE_thread_t *thr_id,
		    ACE_hthread_t *thr_handle,
                    long priority,
		    void *stack,
		    size_t stacksize)
{
  // ACE_TRACE ("ACE_OS::thr_create");

#if defined (ACE_HAS_THREADS)
  ACE_thread_t tmp_thr;
  ACE_hthread_t tmp_handle;

  if (thr_id == 0)
    thr_id = &tmp_thr;

  if (thr_handle == 0)
    thr_handle = &tmp_handle;

#  if defined (ACE_HAS_DCETHREADS) || defined (ACE_HAS_PTHREADS)

  int result;
  pthread_attr_t attr;
#    if defined (ACE_HAS_SETKIND_NP)
  if (::pthread_attr_create (&attr) != 0)
#    else /* ACE_HAS_SETKIND_NP */
  if (::pthread_attr_init (&attr) != 0)
#    endif /* ACE_HAS_SETKIND_NP */
      return -1;
#    if !defined (ACE_LACKS_SETSCHED)
  // The PRIORITY stuff used to be here...-cjc
#    endif /* ACE_LACKS_SETSCHED */


  // *** Set Stack Size
#    if defined (ACE_NEEDS_HUGE_THREAD_STACKSIZE)
  if (stacksize < ACE_NEEDS_HUGE_THREAD_STACKSIZE)
    stacksize = ACE_NEEDS_HUGE_THREAD_STACKSIZE;
#    endif /* ACE_NEEDS_HUGE_THREAD_STACKSIZE */

  if (stacksize != 0)
    {
      size_t size = stacksize;

#    if defined (PTHREAD_STACK_MIN)
      if (size < PTHREAD_STACK_MIN)
	size = PTHREAD_STACK_MIN;
#    endif /* PTHREAD_STACK_MIN */

#    if !defined (ACE_LACKS_THREAD_STACK_SIZE)      // JCEJ 12/17/96
      if (::pthread_attr_setstacksize (&attr, size) != 0)
	{
#      if defined (ACE_HAS_SETKIND_NP)
	  ::pthread_attr_delete (&attr);
#      else /* ACE_HAS_SETKIND_NP */
	  ::pthread_attr_destroy (&attr);
#      endif /* ACE_HAS_SETKIND_NP */
	  return -1;
	}
#    endif /* !ACE_LACKS_THREAD_STACK_SIZE */
    }

  // *** Set Stack Address
#    if !defined (ACE_LACKS_THREAD_STACK_ADDR)
  if (stack != 0)
    {
      if (::pthread_attr_setstackaddr (&attr, stack) != 0)
	{
#      if defined (ACE_HAS_SETKIND_NP)
	  ::pthread_attr_delete (&attr);
#      else /* ACE_HAS_SETKIND_NP */
	  ::pthread_attr_destroy (&attr);
#      endif /* ACE_HAS_SETKIND_NP */
	  return -1;
	}
    }
#    endif /* !ACE_LACKS_THREAD_STACK_ADDR */



  // *** Deal with various attributes
  if (flags != 0)
    {
      // *** Set Detach state
#    if !defined (ACE_LACKS_SETDETACH)
      if (ACE_BIT_ENABLED (flags, THR_DETACHED) 
	  || ACE_BIT_ENABLED (flags, THR_JOINABLE))
	{
	  int dstate = PTHREAD_CREATE_JOINABLE; 

	  if (ACE_BIT_ENABLED (flags, THR_DETACHED))
	    dstate = PTHREAD_CREATE_DETACHED;

#      if defined (ACE_HAS_SETKIND_NP)
	  if (::pthread_attr_setdetach_np (&attr, dstate) != 0)
#      else /* ACE_HAS_SETKIND_NP */
#        if defined (ACE_HAS_PTHREAD_DSTATE_PTR)
	  if (::pthread_attr_setdetachstate (&attr, &dstate) != 0)
#        else
	  if (::pthread_attr_setdetachstate (&attr, dstate) != 0)
#        endif /* ACE_HAS_PTHREAD_DSTATE_PTR */
#      endif /* ACE_HAS_SETKIND_NP */
		{
#      if defined (ACE_HAS_SETKIND_NP)
	    ::pthread_attr_delete (&attr);
#      else /* ACE_HAS_SETKIND_NP */
	    ::pthread_attr_destroy (&attr);
#      endif /* ACE_HAS_SETKIND_NP */
	    return -1;
	  }
	}
#    endif /* ACE_LACKS_SETDETACH */

      // *** Set Policy
#    if !defined (ACE_LACKS_SETSCHED)
      // If we wish to set the priority explicitly, we have to enable
      // explicit scheduling, and a policy, too.
      if (priority != ACE_DEFAULT_THREAD_PRIORITY)
	{
	  ACE_SET_BITS (flags, THR_EXPLICIT_SCHED);
	  if (ACE_BIT_DISABLED (flags, THR_SCHED_FIFO)
	      && ACE_BIT_DISABLED (flags, THR_SCHED_RR)
	      && ACE_BIT_DISABLED (flags, THR_SCHED_DEFAULT))
	    ACE_SET_BITS (flags, THR_SCHED_DEFAULT);
	}

      if (ACE_BIT_ENABLED (flags, THR_SCHED_FIFO)
	  || ACE_BIT_ENABLED (flags, THR_SCHED_RR)
	  || ACE_BIT_ENABLED (flags, THR_SCHED_DEFAULT))
	{
	  int spolicy;

#      if defined (ACE_HAS_ONLY_SCHED_OTHER)
            // Solaris, thru version 2.5.1, only supports SCHED_OTHER.
            spolicy = SCHED_OTHER;
#      else
	  if (ACE_BIT_ENABLED (flags, THR_SCHED_DEFAULT))
	    spolicy = SCHED_OTHER;
	  else if (ACE_BIT_ENABLED (flags, THR_SCHED_FIFO))
	    spolicy = SCHED_FIFO;
	  else
	    spolicy = SCHED_RR;
#      endif

#      if !defined (ACE_HAS_FSU_PTHREADS)
#        if defined (ACE_HAS_SETKIND_NP)
	  result = ::pthread_attr_setsched (&attr, spolicy);
#        else /* ACE_HAS_SETKIND_NP */
	  result = ::pthread_attr_setschedpolicy (&attr, spolicy);
#        endif /* ACE_HAS_SETKIND_NP */
	  if (result != 0)
	      {
		// Preserve the errno value.
		errno = result;
#        if defined (ACE_HAS_SETKIND_NP)
		::pthread_attr_delete (&attr);
#        else /* ACE_HAS_SETKIND_NP */
		::pthread_attr_destroy (&attr);
#        endif /* ACE_HAS_SETKIND_NP */
		return -1;
	      }
#      else
	  int ret;
	  switch (spolicy)
	    {
	    case SCHED_FIFO:
	    case SCHED_RR:
	      ret = 0;
	      break;
	    default:
	      ret = 22;
	      break;
	    }
	  if (ret != 0)
	    {
#        if defined (ACE_HAS_SETKIND_NP)
	      ::pthread_attr_delete (&attr);
#        else /* ACE_HAS_SETKIND_NP */
	      ::pthread_attr_destroy (&attr);
#        endif /* ACE_HAS_SETKIND_NP */
	      return -1;
	    }
#      endif	/*  ACE_HAS_FSU_PTHREADS */
	}

      // *** Set Priority (use reasonable default priorities)
#      if defined(ACE_HAS_PTHREADS_1003_DOT_1C)
      // If we wish to explicitly set a scheduling policy, we also
      // have to specify a priority.  We choose a "middle" priority as
      // default.  Maybe this is also necessary on other POSIX'ish
      // implementations?
      if ((ACE_BIT_ENABLED (flags, THR_SCHED_FIFO)
	   || ACE_BIT_ENABLED (flags, THR_SCHED_RR)
	   || ACE_BIT_ENABLED (flags, THR_SCHED_DEFAULT))
	  && priority == ACE_DEFAULT_THREAD_PRIORITY)
	{
	  if (ACE_BIT_ENABLED (flags, THR_SCHED_FIFO))
	    priority = ACE_THR_PRI_FIFO_DEF;
	  else if (ACE_BIT_ENABLED (flags, THR_SCHED_RR))
	    priority = ACE_THR_PRI_RR_DEF;
	  else // THR_SCHED_DEFAULT
	    priority = ACE_THR_PRI_OTHER_DEF;
	}
#      endif //ACE_HAS_PTHREADS_1003_DOT_1C
      if (priority != ACE_DEFAULT_THREAD_PRIORITY)
	{
	  struct sched_param sparam;
	  ACE_OS::memset ((void *) &sparam, 0, sizeof sparam);

#      if defined (ACE_HAS_DCETHREADS) && !defined (ACE_HAS_SETKIND_NP)
	  sparam.sched_priority = ACE_MIN (priority, PRIORITY_MAX);
#      elif defined(ACE_HAS_IRIX62_THREADS)
	  sparam.sched_priority = ACE_MIN (priority, PTHREAD_MAX_PRIORITY);
#      elif defined (PTHREAD_MAX_PRIORITY) && !defined(ACE_HAS_PTHREADS_1003_DOT_1C)
	  /* For MIT pthreads... */
	  sparam.prio = ACE_MIN (priority, PTHREAD_MAX_PRIORITY);
#      elif defined(ACE_HAS_PTHREADS_1003_DOT_1C)
	  // The following code forces priority into range.
	  if (ACE_BIT_ENABLED (flags, THR_SCHED_FIFO))
	    sparam.sched_priority = 
	      ACE_MIN (ACE_THR_PRI_FIFO_MAX, ACE_MAX (ACE_THR_PRI_FIFO_MIN, priority));
	  else if (ACE_BIT_ENABLED(flags, THR_SCHED_RR))
	    sparam.sched_priority =
	      ACE_MIN (ACE_THR_PRI_RR_MAX, ACE_MAX (ACE_THR_PRI_RR_MIN, priority));
	  else // Default policy, whether set or not
	    sparam.sched_priority =
	      ACE_MIN (ACE_THR_PRI_OTHER_MAX, ACE_MAX (ACE_THR_PRI_OTHER_MIN, priority));
#      else
	  sparam.sched_priority = priority;
#      endif

#      if defined (ACE_HAS_FSU_PTHREADS)
	 if (sparam.sched_priority >= PTHREAD_MIN_PRIORITY
	     && sparam.sched_priority <= PTHREAD_MAX_PRIORITY)
	   attr.prio = sparam.sched_priority;
	 else
	   {
	     pthread_attr_destroy (&attr);
             errno = EINVAL;
	     return -1;
	   }
#      else
         {
#        if defined (ACE_HAS_STHREADS)
           // Solaris POSIX only allows priorities > 0 to
           // ::pthread_attr_setschedparam.  If a priority of 0 was
           // requested, set the thread priority after creating it, below.
           if (priority > 0)
#        endif /* STHREADS */
             {
#        if defined (ACE_HAS_SETKIND_NP)
               result = ::pthread_attr_setsched (&attr, SCHED_OTHER);
#        else /* ACE_HAS_SETKIND_NP */
               result = ::pthread_attr_setschedparam (&attr, &sparam);
#        endif /* ACE_HAS_SETKIND_NP */
               if (result != 0)
                 {
#        if defined (ACE_HAS_SETKIND_NP)
                   ::pthread_attr_delete (&attr);
#        else /* ACE_HAS_SETKIND_NP */
                   ::pthread_attr_destroy (&attr);
#        endif /* ACE_HAS_SETKIND_NP */
                   errno = result;
                   return -1;
                 }
             }
         }
#      endif	/* ACE_HAS_FSU_PTHREADS */
	}

      // *** Set scheduling explicit or inherited
      if (ACE_BIT_ENABLED (flags, THR_INHERIT_SCHED)
	  || ACE_BIT_ENABLED (flags, THR_EXPLICIT_SCHED))
	{
#      if defined (ACE_HAS_SETKIND_NP)
	  int sched = PTHREAD_DEFAULT_SCHED;
#      else /* ACE_HAS_SETKIND_NP */
	  int sched = PTHREAD_EXPLICIT_SCHED;
#      endif /* ACE_HAS_SETKIND_NP */
	  if (ACE_BIT_ENABLED (flags, THR_INHERIT_SCHED))
	    sched = PTHREAD_INHERIT_SCHED;
	  if (::pthread_attr_setinheritsched (&attr, sched) != 0)
	    {
#      if defined (ACE_HAS_SETKIND_NP)
	      ::pthread_attr_delete (&attr);
#      else /* ACE_HAS_SETKIND_NP */
	      ::pthread_attr_destroy (&attr);
#      endif /* ACE_HAS_SETKIND_NP */
	      return -1;
	    }
	}
#    endif /* ACE_LACKS_SETSCHED */


      // *** Set Scope
#    if !defined (ACE_LACKS_THREAD_PROCESS_SCOPING)
      if (ACE_BIT_ENABLED (flags, THR_SCOPE_SYSTEM)
	  || ACE_BIT_ENABLED (flags, THR_SCOPE_PROCESS))
	{
	  int scope = PTHREAD_SCOPE_PROCESS;
	  if (ACE_BIT_ENABLED (flags, THR_SCOPE_SYSTEM))
	    scope = PTHREAD_SCOPE_SYSTEM;

	  if (::pthread_attr_setscope (&attr, scope) != 0)
	    {
#      if defined (ACE_HAS_SETKIND_NP)
	      ::pthread_attr_delete (&attr);
#      else /* ACE_HAS_SETKIND_NP */
	      ::pthread_attr_destroy (&attr);
#      endif /* ACE_HAS_SETKIND_NP */
	      return -1;
	    }
	}
#    endif /* !ACE_LACKS_THREAD_PROCESS_SCOPING */

      if (ACE_BIT_ENABLED (flags, THR_NEW_LWP))
	{
	  // Increment the number of LWPs by one to emulate the
	  // Solaris semantics.
	  int lwps = ACE_OS::thr_getconcurrency ();
	  ACE_OS::thr_setconcurrency (lwps + 1);
	}
    }

#    if defined (ACE_HAS_SETKIND_NP)
  ACE_OSCALL (ACE_ADAPT_RETVAL (::pthread_create (thr_id, attr, func, args), 
				result),
	      int, -1, result);
  ::pthread_attr_delete (&attr);
#    else /* !ACE_HAS_SETKIND_NP */
#      if defined (ACE_HAS_THR_C_FUNC)
  ACE_Thread_Adapter *thread_args;
  ACE_NEW_RETURN (thread_args, ACE_Thread_Adapter (func, args), -1);

  ACE_OSCALL (ACE_ADAPT_RETVAL (::pthread_create (thr_id, &attr,
						  ACE_THR_C_FUNC (&ace_thread_adapter), 
						  thread_args),
				result),
	      int, -1, result);
#      else
  ACE_OSCALL (ACE_ADAPT_RETVAL (::pthread_create (thr_id, &attr, func, args), 
				result),
	      int, -1, result);
#      endif /* ACE_HAS_THR_C_FUNC */
  ::pthread_attr_destroy (&attr);
#    endif /* ACE_HAS_SETKIND_NP */

#    if defined (ACE_HAS_STHREADS)
  // This is the Solaris implementation of pthreads, where
  // ACE_thread_t and ACE_hthread_t are the same.
  if (result != -1)
    *thr_handle = *thr_id;

  // If the priority is 0, then we might have to set it now because we couldn't
  // set it with ::pthread_attr_setschedparam, as noted above.  This doesn't
  // provide strictly correct behavior, because the thread was created
  // (above) with the priority of its parent.  (That applies regardless
  // of the inherit_sched attribute:  if it was PTHREAD_INHERIT_SCHED, then
  // it certainly inherited its parent's priority.  If it was
  // PTHREAD_EXPLICIT_SCHED, then "attr" was initialized by the Solaris
  // ::pthread_attr_init () to contain NULL for the priority, which indicated
  // to Solaris ::pthread_create () to inherit the parent priority.)
  if (priority == 0)
    {
      // Check the priority of this thread, which is the parent of the
      // newly created thread.  If it is 0, then the newly created thread
      // will have inherited the priority of 0, so there's no need to
      // explicitly set it.
      struct sched_param sparam;
      int policy = 0;
      ACE_OSCALL (ACE_ADAPT_RETVAL (::pthread_getschedparam (thr_self (),
                                                             &policy,
                                                             &sparam), 
                                    result), int, 
                  -1, result);

      if (sparam.sched_priority != 0)
        {
          ACE_OS::memset ((void *) &sparam, 0, sizeof sparam);
          // The memset to 0 sets the priority to 0, so we don't need
          // to explicitly set sparam.sched_priority.

          // The only policy currently (version 2.5.1) supported by by Solaris
          // is SCHED_OTHER, so that's hard-coded below.
          ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::pthread_setschedparam (
                                                 *thr_id,
                                                 SCHED_OTHER,
                                                 &sparam),
                                               result),
                             int, -1);
        }
    }
#    else
  *thr_handle = ACE_OS::NULL_hthread;
#    endif /* ACE_HAS_STHREADS */
  return result;
#  elif defined (ACE_HAS_STHREADS)
  int result;
  int start_suspended = ACE_BIT_ENABLED (flags, THR_SUSPENDED);

  if (priority != ACE_DEFAULT_THREAD_PRIORITY)
    // If we need to set the priority, then we need to start the
    // thread in a suspended mode.
    ACE_SET_BITS (flags, THR_SUSPENDED);

  ACE_OSCALL (ACE_ADAPT_RETVAL (::thr_create (stack, stacksize, func, args,
					      flags, thr_id), result), 
	      int, -1, result);

  if (result != -1)
    {
      // With Solaris threads, ACE_thread_t and ACE_hthread_t are the same.
      *thr_handle = *thr_id;

      if (priority != ACE_DEFAULT_THREAD_PRIORITY)
	{
	  // Set the priority of the new thread and then let it
	  // continue, but only if the user didn't start it suspended
	  // in the first place!
          if ((result = ACE_OS::thr_setprio (*thr_id, priority)) != 0)
            {
              errno = result;
              return -1;
            }

	  if (start_suspended == 0)
            {
	      if ((result = ACE_OS::thr_continue (*thr_id)) != 0)
                {
                  errno = result;
                  return -1;
                }
            }
	}
    }
  return result;
#  elif defined (ACE_HAS_WTHREADS)
  ACE_UNUSED_ARG (stack);
  ACE_Thread_Adapter *thread_args;
  ACE_NEW_RETURN (thread_args, ACE_Thread_Adapter (func, args), -1);
#    if defined (ACE_HAS_MFC)
  if (ACE_BIT_ENABLED (flags, THR_USE_AFX))
    {
      CWinThread *cwin_thread = 
	::AfxBeginThread ((AFX_THREADPROC) &ace_thread_adapter,
			  thread_args, priority, 0, 
			  flags | THR_SUSPENDED);
      // Have to duplicate the handle because
      // CWinThread::~CWinThread() closes the original handle.
      (void) ::DuplicateHandle (::GetCurrentProcess (), 
				cwin_thread->m_hThread,
				::GetCurrentProcess (),
				thr_handle,
				0, 
				TRUE,
				DUPLICATE_SAME_ACCESS);
 
      *thr_id = cwin_thread->m_nThreadID;

      if (ACE_BIT_ENABLED (flags, THR_SUSPENDED) == 0)
	cwin_thread->ResumeThread ();
      // cwin_thread will be deleted in AfxThreadExit()
      // Warning: If AfxThreadExit() is called from within the
      // thread, ACE_TSS_Cleanup->exit() never gets called !
    }
  else
#    endif /* ACE_HAS_MFC */
    {
      int start_suspended = ACE_BIT_ENABLED (flags, THR_SUSPENDED);

      if (priority != ACE_DEFAULT_THREAD_PRIORITY)
	// If we need to set the priority, then we need to start the
	// thread in a suspended mode.
	ACE_SET_BITS (flags, THR_SUSPENDED);

      *thr_handle = (void *) ::_beginthreadex 
	(NULL,
	 stacksize,
	 ACE_THR_C_FUNC (&ace_thread_adapter),
	 thread_args,
	 flags,
	 (unsigned int *) thr_id);

      if (priority != ACE_DEFAULT_THREAD_PRIORITY && *thr_handle != 0)
	{
	  // Set the priority of the new thread and then let it
	  // continue, but only if the user didn't start it suspended
	  // in the first place!
	  ACE_OS::thr_setprio (*thr_handle, priority);

	  if (start_suspended == 0)
	    ACE_OS::thr_continue (*thr_handle);
	}
    }
#    if 0
  *thr_handle = ::CreateThread 
    (NULL, stacksize,
     LPTHREAD_START_ROUTINE (ACE_THR_C_FUNC (ace_thread_adapter)),
     thread_args, flags, thr_id);
#    endif /* 0 */

  // Close down the handle if no one wants to use it.
  if (thr_handle == &tmp_handle)
    ::CloseHandle (tmp_handle);

  if (*thr_handle != 0)
    return 0;
  else
    ACE_FAIL_RETURN (-1);
  /* NOTREACHED */
#  elif defined (VXWORKS)
  // The call below to ::taskSpawn () causes VxWorks to assign a
  // unique task name of the form: "t" + an integer, because the
  // first argument is 0.

  // args must be an array of _exactly_ 10 ints.

  // The stack arg is ignored:  if there's a need for it, we'd have to
  // use ::taskInit ()/::taskActivate () instead of ::taskSpawn ().

  // The hard-coded arguments are what ::sp () would use.  ::taskInit ()
  // is used instead of ::sp () so that we can set the priority, flags,
  // and stacksize.  (::sp () also hardcodes priority to 100, flags
  // to VX_FP_TASK, and stacksize to 20,000.)  stacksize should be
  // an even integer.

  // If called with thr_create() defaults, use same default values as ::sp ():
  if (priority == ACE_DEFAULT_THREAD_PRIORITY) priority = 100;
  if (flags == 0) flags = VX_FP_TASK; // Assumes that there is a
  // floating point coprocessor.
  // As noted above, ::sp () hardcodes
  // this, so we should be safe with it.

  if (stacksize == 0) stacksize = 20000;

  ACE_hthread_t tid = ::taskSpawn (0, priority,
				   (int) flags, (int) stacksize, func,
				   (int)args, 0, 0, 0, 0, 0, 0, 0, 0, 0 );

  if (tid == ERROR)
    return -1;
  else
    {
      // ::taskTcb (int tid) returns the address of the WIND_TCB
      // (task control block).  According to the ::taskSpawn()
      // documentation, the name of the new task is stored at
      // pStackBase, but is that of the current task?  If so, it
      // might be a bit quicker than this extraction of the tcb . . .
      *thr_id = ::taskTcb (tid)->name;
      *thr_handle = tid;
      return 0;
    }

#  endif /* ACE_HAS_STHREADS */
#else
  ACE_UNUSED_ARG (func);
  ACE_UNUSED_ARG (args);
  ACE_UNUSED_ARG (flags);
  ACE_UNUSED_ARG (thr_id);
  ACE_UNUSED_ARG (thr_handle);
  ACE_UNUSED_ARG (priority);
  ACE_UNUSED_ARG (stack);
  ACE_UNUSED_ARG (stacksize);
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */		
}

void 
ACE_OS::thr_exit (void *status)
{
// ACE_TRACE ("ACE_OS::thr_exit");
#if defined (ACE_HAS_THREADS)
#if defined (ACE_HAS_DCETHREADS) || defined (ACE_HAS_PTHREADS)
  ::pthread_exit (status);
#elif defined (ACE_HAS_STHREADS)
  ::thr_exit (status);
#elif defined (ACE_HAS_WTHREADS)
  // Cleanup the thread-specific resources and exit.
  ACE_TSS_Cleanup::instance ()->exit (status);
#elif defined (VXWORKS)
  ACE_hthread_t tid;
  ACE_OS::thr_self (tid);

  *((int *) status) = ::taskDelete (tid);
#endif /* ACE_HAS_STHREADS */
#else
  ACE_UNUSED_ARG (status);
#endif /* ACE_HAS_THREADS */		     
}

int 
ACE_OS::thr_setspecific (ACE_thread_key_t key, void *data)
{
// ACE_TRACE ("ACE_OS::thr_setspecific");
#if defined (ACE_HAS_THREADS)
#if defined (ACE_HAS_DCETHREADS) || defined (ACE_HAS_PTHREADS)
#if defined (ACE_HAS_FSU_PTHREADS)
// Call pthread_init() here to initialize threads package.  FSU
// threads need an initialization before the first thread constructor.
// This seems to be the one; however, a segmentation fault may
// indicate that another pthread_init() is necessary, perhaps in
// Synch.cpp or Synch_T.cpp.  FSU threads will not reinit if called
// more than once, so another call to pthread_init will not adversely
// affect existing threads.
  pthread_init ();
#endif 	/*  ACE_HAS_FSU_PTHREADS */
  ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::pthread_setspecific (key, data), ace_result_), 
		     int, -1);
#elif defined (ACE_HAS_STHREADS)
  ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::thr_setspecific (key, data), ace_result_), int, -1);
#elif defined (ACE_HAS_WTHREADS)
  ::TlsSetValue (key, data);
  ACE_TSS_Cleanup::instance ()->key_used (key);
  return 0;
#elif defined (VXWORKS)
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STHREADS */
#else
  ACE_UNUSED_ARG (key);
  ACE_UNUSED_ARG (data);
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */
}

int 
ACE_OS::thr_keyfree (ACE_thread_key_t key)
{
// ACE_TRACE ("ACE_OS::thr_keyfree");
#if defined (ACE_HAS_THREADS)
#if defined (ACE_LACKS_KEYDELETE)
  ACE_NOTSUP_RETURN (-1);
#elif defined (ACE_HAS_PTHREADS) && !defined (ACE_HAS_FSU_PTHREADS)
  return ::pthread_key_delete (key);
#elif defined (ACE_HAS_DCETHREADS) 
  ACE_NOTSUP_RETURN (-1);
#elif defined (ACE_HAS_THR_KEYDELETE)
  return ::thr_keydelete (key);
#elif defined (ACE_HAS_STHREADS)
  ACE_NOTSUP_RETURN (-1);
#elif defined (ACE_HAS_WTHREADS)
  // Extract out the thread-specific table instance and and free up
  // the key and destructor.
  ACE_TSS_Cleanup::instance ()->remove (key);
  ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::TlsFree (key), ace_result_), int, -1);
#elif defined (VXWORKS)
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STHREADS */
#else
  ACE_UNUSED_ARG (key);
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */
}

int 
ACE_OS::thr_keycreate (ACE_thread_key_t *key, 
#if defined (ACE_HAS_THR_C_DEST)
		       ACE_THR_C_DEST dest,
#else
		       ACE_THR_DEST dest,
#endif /* ACE_HAS_THR_C_DEST */
		       void *inst)
{
// ACE_TRACE ("ACE_OS::thr_keycreate");
  inst = inst;
#if defined (ACE_HAS_THREADS)
#if defined (ACE_HAS_DCETHREADS) || defined (ACE_HAS_PTHREADS)
#if defined (ACE_HAS_SETKIND_NP)
  ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::pthread_keycreate (key, dest), 
                                       ace_result_), 
                     int, -1);
#else /* ACE_HAS_SETKIND_NP */
  ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::pthread_key_create (key, dest), 
                                       ace_result_), 
                     int, -1);
#endif /* ACE_HAS_SETKIND_NP */
#elif defined (ACE_HAS_STHREADS)
  ACE_OSCALL_RETURN (ACE_ADAPT_RETVAL (::thr_keycreate (key, dest), 
				       ace_result_), 
		     int, -1);
#elif defined (ACE_HAS_WTHREADS)
  *key = ::TlsAlloc ();

  if (*key != ACE_SYSCALL_FAILED)
    {
      // Extract out the thread-specific table instance and stash away
      // the key and destructor so that we can free it up later on...
      return ACE_TSS_Cleanup::instance ()->insert (*key, dest, inst);
    }
  else
    ACE_FAIL_RETURN (-1);
    /* NOTREACHED */

#elif defined (VXWORKS)
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STHREADS */
#else
  ACE_UNUSED_ARG (key);
  ACE_UNUSED_ARG (dest);
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */		     
}

int 
ACE_OS::thr_key_used (ACE_thread_key_t key)
{
#if defined (ACE_WIN32)
  return ACE_TSS_Cleanup::instance ()->key_used (key);
#else
  key = key;
  ACE_NOTSUP_RETURN (-1);  
#endif /* ACE_WIN32 */
}

int 
ACE_OS::thr_key_detach (void *inst)
{
#if defined (ACE_WIN32)
  return ACE_TSS_Cleanup::instance()->detach (inst);
#else
  inst = inst;
  ACE_NOTSUP_RETURN (-1);  
#endif /* ACE_WIN32 */
}

// Create a contiguous command-line argument buffer with each arg
// separated by spaces.

pid_t
ACE_OS::fork_exec (char *argv[])
{
#if defined (ACE_WIN32)
  ACE_ARGV argv_buf (argv);

  LPTSTR buf = (LPTSTR) ACE_WIDE_STRING (argv_buf.buf ());  

  if (buf != 0)
    {
      PROCESS_INFORMATION process_info;
      STARTUPINFO startup_info;
      ACE_OS::memset ((void *) &startup_info, 0, sizeof startup_info);
      startup_info.cb = sizeof startup_info;

      if (::CreateProcess (NULL,
			   buf,
			   NULL, // No process attributes.
			   NULL,  // No thread attributes.
			   TRUE, // Allow handle inheritance.
			   CREATE_NEW_CONSOLE, // Create a new console window.
			   NULL, // No environment.
			   NULL, // No current directory.
			   &startup_info,
			   &process_info))
	{
	  // Free resources allocated in kernel.
	  ACE_OS::close (process_info.hThread);
	  ACE_OS::close (process_info.hProcess);
	  // Return new process id.
	  return process_info.dwProcessId;
	}
    }

  // CreateProcess failed.
  return -1; 
#elif defined (CHORUS)
  return -1;			// do it later!!!
#else
      pid_t result = ACE_OS::fork ();

      switch (result)
	{
	case -1:
	  // Error.
	  return -1;
	case 0:
	  // Child process.
	  if (ACE_OS::execv (argv[0], argv) == -1)
	    {
	      ACE_ERROR ((LM_ERROR, "%p Exec failed\n"));

	      // If the execv fails, this child needs to exit.
	      ACE_OS::exit (errno);
	    }
	default:
	  // Server process.  The fork succeeded.
	  return result;
	}
#endif /* ACE_WIN32 */
    }

#if defined (ACE_NEEDS_WRITEV)

// "Fake" writev for sites without it.  Note that this is thread-safe.

extern "C" int
writev (ACE_HANDLE handle, ACE_WRITEV_TYPE iov[], int n)
{
// ACE_TRACE ("::writev");

  size_t length = 0;
  int i;

  // Determine the total length of all the buffers in <iov>.
  for (i = 0; i < n; i++)
    if (iov[i].iov_len < 0)
      return -1;
    else
      length += iov[i].iov_len;

  char *buf;

#if defined (ACE_HAS_ALLOCA)
  buf = (char *) alloca (length);
#else 
  ACE_NEW_RETURN (buf, char[length], -1);
#endif /* !defined (ACE_HAS_ALLOCA) */

  char *ptr = buf;

  for (i = 0; i < n; i++)
    {
      ACE_OS::memcpy (ptr, iov[i].iov_base, iov[i].iov_len);
      ptr += iov[i].iov_len;
    }

  ssize_t result = ACE::send_n (handle, buf, length);
#if !defined (ACE_HAS_ALLOCA)
  delete [] buf;
#endif /* !defined (ACE_HAS_ALLOCA) */
  return result;
}
#endif /* ACE_NEEDS_WRITEV */

#if defined (ACE_NEEDS_READV)

// "Fake" readv for sites without it.  Note that this is thread-safe.

extern "C" int
readv (ACE_HANDLE handle, struct iovec *iov, int n)
{
// ACE_TRACE ("::readv");

  ssize_t length = 0;
  int i;

  for (i = 0; i < n; i++)
    if (iov[i].iov_len < 0)
      return -1;
    else
      length += iov[i].iov_len;

  char *buf;
#if defined (ACE_HAS_ALLOCA)
  buf = (char *) alloca (length);
#else 
  ACE_NEW_RETURN (buf, char[length], -1);
#endif /* !defined (ACE_HAS_ALLOCA) */

  length = ACE::recv_n (handle, buf, length);

  if (length != -1)
    {
      char *ptr = buf;
      int copyn = length;
     
      for (i = 0; 
	   i < n && copyn > 0; 
	   i++)
	{
	  ACE_OS::memcpy (iov[i].iov_base, ptr,
                          // iov_len is int on some platforms, size_t on others
			  copyn > (int) iov[i].iov_len
                            ? (size_t) iov[i].iov_len
                            : (size_t) copyn);
	  ptr += iov[i].iov_len;
	  copyn -= iov[i].iov_len;
	}
    }

#if !defined (ACE_HAS_ALLOCA)
  delete [] buf;
#endif /* !defined (ACE_HAS_ALLOCA) */
  return length;
}
#endif /* ACE_NEEDS_READV */

#if defined (ACE_NEEDS_FTRUNCATE)
extern "C" int
ftruncate (ACE_HANDLE handle, long len)
{
  struct flock fl;
  fl.l_whence = 0;
  fl.l_len = 0;
  fl.l_start = len;
  fl.l_type = F_WRLCK;

  return ::fcntl (handle, F_FREESP, &fl);
}
#endif /* ACE_NEEDS_FTRUNCATE */

char *
ACE_OS::mktemp (char *s)
{
  // ACE_TRACE ("ACE_OS::mktemp");
#if defined (ACE_LACKS_MKTEMP)
  if (s == 0) 
    // check for null template string failed!
    return 0;
  else
    {
      char *xxxxxx = ACE_OS::strstr (s, "XXXXXX");

      if (xxxxxx == 0)
        // the template string doesn't contain "XXXXXX"!
        return s;
      else
        {
          char unique_letter = 'a';
          struct stat sb;

          // Find an unused filename for this process.  It is assumed
          // that the user will open the file immediately after
          // getting this filename back (so, yes, there is a race
          // condition if multiple threads in a process use the same
          // template).  This appears to match the behavior of the
          // Solaris 2.5 mktemp().
          ACE_OS::sprintf (xxxxxx, "%05d%c", getpid (), unique_letter);
          while (::stat (s, &sb) >= 0)
            {
	      if (++unique_letter <= 'z')
		ACE_OS::sprintf (xxxxxx, "%05d%c", getpid (), unique_letter);
	      else
		{
		  // maximum of 26 unique files per template, per process
		  ACE_OS::sprintf (xxxxxx, "%s", "");
		  return s;
		}
            }
        }
      return s;
    }
  
#else
  return ::mktemp (s);
#endif /* ACE_LACKS_MKTEMP */
}

int
ACE_OS::socket_init (int version_high, int version_low)
{
#if defined (ACE_WIN32)
  if (ACE_OS::socket_initialized_ == 0)
    {
      // cout << "WSAStartup" << endl;
      WORD version_requested = MAKEWORD (version_high, version_low);
      WSADATA wsa_data;
      int error = ::WSAStartup (version_requested, &wsa_data);

      if (error != 0)
	cerr << "WSAStartup failed, WSAGetLastError returned " << error << endl;

      ACE_OS::socket_initialized_ = 1;
    }
#else
  version_high = version_high;
  version_low = version_low;
#endif /* ACE_WIN32 */
  return 0;
}

int
ACE_OS::socket_fini (void)
{
#if defined (ACE_WIN32)
  if (ACE_OS::socket_initialized_ != 0)
    {
      // cout << "WSACleanup" << endl;
      if (::WSACleanup () != 0)
	{
	  int error = ::WSAGetLastError ();
	  cerr << "WSACleanup failed, WSAGetLastError returned " << error << endl;
	}
      ACE_OS::socket_initialized_ = 0;
    }
#endif /* ACE_WIN32 */
  return 0;
}

#if defined (ACE_LACKS_SYS_NERR)
int sys_nerr = ERRMAX + 1;
#endif /* ACE_LACKS_SYS_NERR */

#if defined (VXWORKS)
#include /**/ <usrLib.h>   /* for ::sp() */

// This global function can be used from the VxWorks shell to pass
// arguments to a C main () function.  usage: -> spa main, "arg1",
// "arg2" All arguments must be quoted, even numbers.
int
spa (FUNCPTR entry, ...)
{
  static const unsigned int MAX_ARGS = 10;
  static char *argv[MAX_ARGS];
  va_list pvar;
  int argc;

  // Hardcode a program name because the real one isn't available
  // through the VxWorks shell.
  argv[0] = "spa ():t";

  // Peel off arguments to spa () and put into argv.  va_arg () isn't
  // necessarily supposed to return 0 when done, though since the
  // VxWorks shell uses a fixed number (10) of arguments, it might 0
  // the unused ones.  This function could be used to increase that
  // limit, but then it couldn't depend on the trailing 0.  So, the
  // number of arguments would have to be passed.
  va_start (pvar, entry);

  for (argc = 1; argc <= MAX_ARGS; ++argc)
    {
      argv[argc] = va_arg (pvar, char *);

      if (argv[argc] == 0)
	break;
    }

  if (argc > MAX_ARGS  &&  argv[argc-1] != 0)
    {
      // try to read another arg, and warn user if the limit was exceeded
      if (va_arg (pvar, char *) != 0)
	fprintf (stderr, "spa(): number of arguments limited to %d\n",
		 MAX_ARGS);
    }
  else
    {
      // fill unused argv slots with 0 to get rid of leftovers
      // from previous invocations
      for (int i = argc; i <= MAX_ARGS; ++i)
	argv[i] = 0;
    }

  int ret = ::sp (entry, argc, (int) argv, 0, 0, 0, 0, 0, 0, 0);
  va_end (pvar);

  // ::sp () returns the taskID on success: return 0 instead if
  // successful
  return ret > 0 ? 0 : ret;
}
#endif /* VXWORKS */

#if !defined (ACE_HAS_SIGINFO_T)
siginfo_t::siginfo_t (ACE_HANDLE handle)
  : si_handle_ (handle),
    si_handles_ (&handle)
{
}

siginfo_t::siginfo_t (ACE_HANDLE *handles)
  : si_handle_ (handles[0]),
    si_handles_ (handles)
{
}
#endif /* ACE_HAS_SIGINFO_T */

pid_t
ACE_OS::fork (const char *program_name)
{
  // ACE_TRACE ("ACE_OS::fork");
#if defined (ACE_LACKS_EXEC)
  ACE_UNUSED_ARG (program_name);
  ACE_NOTSUP_RETURN (pid_t (-1));
#else
  pid_t pid = ::fork ();

  if (pid == 0)
    ACE_LOG_MSG->sync (program_name);

  return pid;
#endif /* ACE_WIN32 */
}

// This is necessary to work around nasty problems with MVS C++.

extern "C" void
ace_mutex_lock_cleanup_adapter (void *args)
{
  ACE_OS::mutex_lock_cleanup (args);
}

ACE_Thread_ID::ACE_Thread_ID (ACE_thread_t thread_id,
			      ACE_hthread_t thread_handle)
  : thread_id_ (thread_id),
    thread_handle_ (thread_handle)
{
}

ACE_thread_t 
ACE_Thread_ID::id (void)
{
  return this->thread_id_;
}

void 
ACE_Thread_ID::id (ACE_thread_t thread_id)
{
  this->thread_id_ = thread_id;
}

ACE_hthread_t 
ACE_Thread_ID::handle (void)
{
  return this->thread_handle_;
}

void 
ACE_Thread_ID::handle (ACE_hthread_t thread_handle)
{
  this->thread_handle_ = thread_handle;
}

int 
ACE_Thread_ID::operator == (const ACE_Thread_ID &rhs)
{
  return ACE_OS::thr_cmp (this->thread_handle_, rhs.thread_handle_) == 0
    && ACE_OS::thr_equal (this->thread_id_, rhs.thread_id_) == 0;
}

int 
ACE_Thread_ID::operator != (const ACE_Thread_ID &rhs)
{
  return !(*this == rhs);
}

int 
ACE_OS::inet_aton (const char *host_name, struct in_addr *addr)
{
  long ip_addr = ACE_OS::inet_addr (host_name);
  if (ip_addr == (long) htonl ((ACE_UINT32) ~0)
      // Broadcast addresses are weird...
      && ACE_OS::strcmp (host_name, "255.255.255.255") != 0)
    return 0;
  else if (addr != 0)
    {
      ACE_OS::memcpy ((void *) addr, (void *) &ip_addr, sizeof ip_addr);
      return 1;
    }
  else
    return 1;
}

ssize_t 
ACE_OS::pread (ACE_HANDLE handle, 
	       void *buf,  
	       size_t nbytes,
	       off_t offset)
{
#if defined (ACE_HAS_P_READ_WRITE)
#if defined (ACE_WIN32)
  // This will work irrespective of whether the <handle> is in
  // OVERLAPPED mode or not.  
  OVERLAPPED overlapped;
  overlapped.Internal = 0;
  overlapped.InternalHigh = 0;
  overlapped.Offset = offset;
  overlapped.OffsetHigh = 0;
  overlapped.hEvent = 0;
  
  DWORD bytes_written; // This is set to 0 byte WriteFile.
  
  if (::ReadFile (handle, buf, nbytes, &bytes_written, &overlapped))
    return (ssize_t) bytes_written;
  else if (::GetLastError () == ERROR_IO_PENDING)
    if (::GetOverlappedResult (handle, &overlapped, &bytes_written, TRUE) == TRUE)
      return (ssize_t) bytes_written;
  
  return -1;
#else
  return ::pread (handle, buf, nbytes, offset);
#endif /* ACE_WIN32 */  
#elif defined (ACE_HAS_THREADS)
  ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ace_os_monitor_lock, -1);

  if (ACE_OS::lseek (handle, offset, SEEK_SET) == -1)
    return -1;
  else
    return ACE_OS::read (handle, buf, nbytes);
#else
  ACE_UNUSED_ARG (handle);
  ACE_UNUSED_ARG (buf);
  ACE_UNUSED_ARG (nbytes);
  ACE_UNUSED_ARG (offset);
  ACE_NOTSUP_RETURN (-1);  
#endif /* ACE_HAD_P_READ_WRITE */
}

ssize_t 
ACE_OS::pwrite (ACE_HANDLE handle, 
		const void *buf,  
		size_t nbytes,
		off_t offset)
{
#if defined (ACE_HAS_P_READ_WRITE)
#if defined (ACE_WIN32)
  // This will work irrespective of whether the <handle> is in
  // OVERLAPPED mode or not.
  OVERLAPPED overlapped;
  overlapped.Internal = 0;
  overlapped.InternalHigh = 0;
  overlapped.Offset = offset;
  overlapped.OffsetHigh = 0;
  overlapped.hEvent = 0;

  DWORD bytes_written; // This is set to 0 byte WriteFile.

  if (::WriteFile (handle, buf, nbytes, &bytes_written, &overlapped))
    return (ssize_t) bytes_written;
  else if (::GetLastError () == ERROR_IO_PENDING)
    if (::GetOverlappedResult (handle, &overlapped, &bytes_written, TRUE) == TRUE)
      return (ssize_t) bytes_written;
  
  return -1;
#else
  return ::pwrite (handle, buf, nbytes, offset);
#endif /* ACE_WIN32 */  
#elif defined (ACE_HAS_THREADS)
  ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ace_os_monitor_lock, -1);

  if (ACE_OS::lseek (handle, offset, SEEK_SET) == -1)
    return -1;
  else
    return ACE_OS::write (handle, buf, nbytes);
#else
  ACE_UNUSED_ARG (handle);
  ACE_UNUSED_ARG (buf);
  ACE_UNUSED_ARG (nbytes);
  ACE_UNUSED_ARG (offset);
  ACE_NOTSUP_RETURN (-1);  
#endif /* ACE_HAD_P_READ_WRITE */
}

time_t
ACE_OS::mktime (struct tm *t)
{
  // ACE_TRACE ("ACE_OS::asctime");
#if defined (ACE_HAS_MT_SAFE_MKTIME) || !defined (ACE_HAS_THREADS)
  ACE_OSCALL_RETURN (::mktime (t), time_t, (time_t) -1);
#else
  ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ace_os_monitor_lock, (time_t) -1);
  ACE_OSCALL_RETURN (::mktime (t), time_t, (time_t) -1);
#endif /* ACE_HAS_MT_SAFE_MKTIME */
}