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
|
/*
* @licence app begin@
* SPDX license identifier: MPL-2.0
*
* Copyright (C) 2011-2015, BMW AG
*
* This file is part of GENIVI Project DLT - Diagnostic Log and Trace.
*
* This Source Code Form is subject to the terms of the
* Mozilla Public License (MPL), v. 2.0.
* If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*
* For further information see http://www.genivi.org/.
* @licence end@
*/
/*!
* \author Alexander Wenzel <alexander.aw.wenzel@bmw.de>
*
* \copyright Copyright © 2011-2015 BMW AG. \n
* License MPL-2.0: Mozilla Public License version 2.0 http://mozilla.org/MPL/2.0/.
*
* \file dlt_shm.c
*/
/*******************************************************************************
** **
** SRC-MODULE: dlt_shm.c **
** **
** TARGET : linux **
** **
** PROJECT : DLT **
** **
** AUTHOR : Alexander Wenzel Alexander.AW.Wenzel@bmw.de **
** **
** PURPOSE : **
** **
** REMARKS : **
** **
** PLATFORM DEPENDANT [yes/no]: yes **
** **
** TO BE CHANGED BY USER [yes/no]: no **
** **
*******************************************************************************/
/*******************************************************************************
** Author Identity **
********************************************************************************
** **
** Initials Name Company **
** -------- ------------------------- ---------------------------------- **
** aw Alexander Wenzel BMW **
*******************************************************************************/
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#if !defined(_MSC_VER)
# include <unistd.h>
# include <syslog.h>
#endif
#include <dlt_shm.h>
#include <dlt_common.h>
void dlt_shm_print_hex(char *ptr, int size)
{
int num;
for (num = 0; num < size; num++) {
if ((num % 16) == 15)
printf("%.2x\n", ((unsigned char *)ptr)[num]);
else
printf("%.2x ", ((unsigned char *)ptr)[num]);
}
printf("\n");
}
void dlt_shm_pv(int id, int operation)
{
static struct sembuf semaphor;
semaphor.sem_op = operation;
semaphor.sem_flg = SEM_UNDO;
if (semop(id, &semaphor, 1) == -1)
dlt_log(LOG_WARNING, "SHM: semop() failed");
}
int dlt_shm_init_server(DltShm *buf, int key, int size)
{
struct shmid_ds shm_buf;
unsigned char *ptr;
/* Init parameters */
buf->shmid = 0;
buf->semid = 0;
/* Create the segment. */
if ((buf->shmid = shmget(key, size, IPC_CREAT | 0666)) < 0) {
dlt_log(LOG_WARNING, "SHM: shmget() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* get the size of shm */
if (shmctl(buf->shmid, IPC_STAT, &shm_buf)) {
dlt_log(LOG_WARNING, "SHM: shmctl() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* Now we attach the segment to our data space. */
if ((ptr = shmat(buf->shmid, NULL, 0)) == (unsigned char *)-1) {
dlt_log(LOG_WARNING, "SHM: shmat() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* Init semaphore */
if ((buf->semid = semget(DLT_SHM_SEM, 1, S_IRWXU | S_IRWXG | S_IRWXO | IPC_CREAT | IPC_EXCL)) == -1) {
if ((buf->semid = semget(DLT_SHM_SEM, 1, S_IRWXU | S_IRWXG | S_IRWXO | IPC_EXCL)) == -1) {
dlt_log(LOG_WARNING, "SHM: semget() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
}
if (semctl(buf->semid, 0, SETVAL, (int)1) == -1) {
dlt_log(LOG_WARNING, "SHM: semctl() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* init buffer */
dlt_buffer_init_static_server(&(buf->buffer), ptr, shm_buf.shm_segsz);
return DLT_RETURN_OK; /* OK */
}
DltReturnValue dlt_shm_init_client(DltShm *buf, int key)
{
struct shmid_ds shm_buf;
unsigned char *ptr;
/* init parameters */
buf->shmid = 0;
buf->semid = 0;
/* Create the segment. */
if ((buf->shmid = shmget(key, 0, 0666)) < 0) {
dlt_log(LOG_WARNING, "SHM: shmget() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* get the size of shm */
if (shmctl(buf->shmid, IPC_STAT, &shm_buf)) {
dlt_log(LOG_WARNING, "SHM: shmctl() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* Now we attach the segment to our data space. */
if ((ptr = shmat(buf->shmid, NULL, 0)) == (unsigned char *)-1) {
dlt_log(LOG_WARNING, "shmat() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* Init semaphore */
if ((buf->semid = semget(DLT_SHM_SEM, 0, 0)) == -1) {
dlt_log(LOG_WARNING, "SHM: semget() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* init buffer */
dlt_buffer_init_static_client(&(buf->buffer), ptr, shm_buf.shm_segsz);
return DLT_RETURN_OK; /* OK */
}
void dlt_shm_info(DltShm *buf)
{
dlt_buffer_info(&(buf->buffer));
}
void dlt_shm_status(DltShm *buf)
{
dlt_buffer_status(&(buf->buffer));
}
int dlt_shm_get_total_size(DltShm *buf)
{
return dlt_buffer_get_total_size(&(buf->buffer));
}
int dlt_shm_get_used_size(DltShm *buf)
{
int ret;
/* check if buffer available */
if (!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_get_used_size(&(buf->buffer));
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_get_message_count(DltShm *buf)
{
return dlt_buffer_get_message_count(&(buf->buffer));
}
int dlt_shm_push(DltShm *buf,
const unsigned char *data1,
unsigned int size1,
const unsigned char *data2,
unsigned int size2,
const unsigned char *data3,
unsigned int size3)
{
int ret;
/* check if buffer available */
if (!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_push3(&(buf->buffer), data1, size1, data2, size2, data3, size3);
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_pull(DltShm *buf, unsigned char *data, int max_size)
{
int ret;
/* check if buffer available */
if (!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_pull(&(buf->buffer), data, max_size);
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_copy(DltShm *buf, unsigned char *data, int max_size)
{
int ret;
/* check if buffer available */
if (!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_copy(&(buf->buffer), data, max_size);
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
int dlt_shm_remove(DltShm *buf)
{
int ret;
/* check if buffer available */
if (!buf->buffer.mem)
return -1;
DLT_SHM_SEM_GET(buf->semid);
ret = dlt_buffer_remove(&(buf->buffer));
DLT_SHM_SEM_FREE(buf->semid);
return ret;
}
DltReturnValue dlt_shm_free_server(DltShm *buf)
{
if (shmdt(buf->buffer.shm)) {
dlt_log(LOG_WARNING, "SHM: shmdt() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
if (shmctl(buf->shmid, IPC_RMID, NULL) == -1) {
dlt_log(LOG_WARNING, "SHM: shmdt() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
if (semctl(buf->semid, 0, IPC_RMID, (int)0) == -1) {
dlt_log(LOG_WARNING, "SHM: shmdt() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* Reset parameters */
buf->shmid = 0;
buf->semid = 0;
return dlt_buffer_free_static(&(buf->buffer));
}
DltReturnValue dlt_shm_free_client(DltShm *buf)
{
if (shmdt(buf->buffer.shm)) {
dlt_log(LOG_WARNING, "SHM: shmdt() failed");
return DLT_RETURN_ERROR; /* ERROR */
}
/* Reset parameters */
buf->shmid = 0;
buf->semid = 0;
return dlt_buffer_free_static(&(buf->buffer));
}
|
