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
|
{
This file is part of the Free Component Library (FCL)
Copyright (c) 1999-2002 by the Free Pascal development team
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
{****************************************************************************}
{* TThread *}
{****************************************************************************}
(* OS/2 specific declarations - see unit DosCalls for descriptions *)
type
{ TByteArray = array [0..$fff0] of byte;
PByteArray = ^TByteArray;
}
{ TThreadEntry = function (Param: pointer): longint; cdecl;
}
TSysThreadIB = record
TID, Priority, Version: longint;
MCCount, MCForceFlag: word;
end;
PSysThreadIB = ^TSysThreadIB;
TThreadInfoBlock = record
Exh_Chain, Stack, StackLimit: pointer;
TIB2: PSysThreadIB;
Version, Ordinal: longint;
end;
PThreadInfoBlock = ^TThreadInfoBlock;
PPThreadInfoBlock = ^PThreadInfoBlock;
TProcessInfoBlock = record
PID, ParentPID, HMTE: longint;
Cmd, Env: PByteArray;
flStatus, tType: longint;
end;
PProcessInfoBlock = ^TProcessInfoBlock;
PPProcessInfoBlock = ^PProcessInfoBlock;
const
{ deThread = 0;
deProcess = 1;
}
dtSuspended = 1;
dtStack_Commited = 2;
dtWait = 0;
dtNoWait = 1;
procedure DosGetInfoBlocks (PATIB: PPThreadInfoBlock;
PAPIB: PPProcessInfoBlock); cdecl; external 'DOSCALLS' index 312;
function DosSetPriority (Scope, TrClass: cardinal; Delta: longint;
PortID: cardinal): cardinal; cdecl; external 'DOSCALLS' index 236;
{
procedure DosExit (Action, Result: cardinal); cdecl;
external 'DOSCALLS' index 233;
function DosCreateThread (var TID: cardinal; Address: TThreadEntry;
aParam: pointer; Flags: cardinal; StackSize: cardinal): cardinal; cdecl;
external 'DOSCALLS' index 311;
function DosKillThread (TID: cardinal): cardinal; cdecl;
external 'DOSCALLS' index 111;
function DosResumeThread (TID: cardinal): cardinal; cdecl;
external 'DOSCALLS' index 237;
function DosSuspendThread (TID: cardinal): cardinal; cdecl;
external 'DOSCALLS' index 238;
}
function DosWaitThread (var TID: cardinal; Option: cardinal): cardinal; cdecl;
external 'DOSCALLS' index 349;
const
Priorities: array [TThreadPriority] of word = ($100, $200, $207, $20F, $217,
$21F, $300);
ThreadCount: longint = 0;
(* Implementation of exported functions *)
procedure AddThread;
begin
InterlockedIncrement (ThreadCount);
end;
procedure RemoveThread;
begin
InterlockedDecrement (ThreadCount);
end;
procedure TThread.SysCreate(CreateSuspended: Boolean;
const StackSize: SizeUInt);
var
Flags: cardinal;
begin
AddThread;
{ Always start in suspended state, will be resumed in AfterConstruction if necessary
See Mantis #16884 }
Flags := dtStack_Commited or dtSuspended;
FSuspended := CreateSuspended;
FInitialSuspended := CreateSuspended;
if FSuspended then Flags := Flags or dtSuspended;
FHandle := BeginThread (nil, StackSize, @ThreadProc, pointer (Self),
Flags, FThreadID);
FFatalException := nil;
end;
procedure TThread.SysDestroy;
begin
if not FFinished and not Suspended then
begin
Terminate;
WaitFor;
end;
{ if FHandle <> 0 then DosKillThread (cardinal (FHandle));}
FFatalException.Free;
FFatalException := nil;
RemoveThread;
end;
procedure TThread.CallOnTerminate;
begin
FOnTerminate (Self);
end;
procedure TThread.DoTerminate;
begin
if Assigned (FOnTerminate) then
Synchronize (@CallOnTerminate);
end;
function TThread.GetPriority: TThreadPriority;
var
PTIB: PThreadInfoBlock;
PPIB: PProcessInfoBlock;
I: TThreadPriority;
begin
DosGetInfoBlocks (@PTIB, @PPIB);
with PTIB^.TIB2^ do
if Priority >= $300 then GetPriority := tpTimeCritical else
if Priority < $200 then GetPriority := tpIdle else
begin
I := Succ (Low (TThreadPriority));
while (I < High (TThreadPriority)) and
(Priority - Priorities [I] <= Priorities [Succ (I)] - Priority) do Inc (I);
GetPriority := I;
end;
end;
procedure TThread.SetPriority(Value: TThreadPriority);
var
PTIB: PThreadInfoBlock;
PPIB: PProcessInfoBlock;
RC: cardinal;
begin
DosGetInfoBlocks (@PTIB, @PPIB);
(*
PTIB^.TIB2^.Priority := Priorities [Value];
*)
RC := DosSetPriority (2, High (Priorities [Value]),
Low (Priorities [Value]) - PTIB^.TIB2^.Priority, FHandle);
if RC <> 0 then
OSErrorWatch (RC);
end;
procedure TThread.SetSuspended(Value: Boolean);
begin
if Value <> FSuspended then
begin
if Value then
Suspend
else
Resume;
end;
end;
procedure TThread.Suspend;
begin
FSuspended := true;
SuspendThread (FHandle);
{DosSuspendThread (cardinal (FHandle)) = 0;}
end;
procedure TThread.Resume;
begin
if ResumeThread (FHandle) = 1 then
FSuspended := false;
{ FSuspended := not (DosResumeThread (cardinal (FHandle)) = 0);}
end;
procedure TThread.Terminate;
begin
FTerminated := true;
end;
function TThread.WaitFor: Integer;
var
FH: cardinal;
RC: cardinal;
begin
if GetCurrentThreadID = MainThreadID then
while not (FFinished) do
CheckSynchronize (1000);
RC := DosWaitThread (FH, dtWait);
if RC <> 0 then
OSErrorWatch (RC);
WaitFor := RC;
end;
|
