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
|
/*******************************************************************************
* Copyright (c) 2013 protos software gmbh (http://www.protos.de).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* CONTRIBUTORS:
* Henrik Rentz-Reichert (initial contribution)
*
*******************************************************************************/
/**
*
* etSema.c POSIX implementation of etSema
*
*/
#include <errno.h>
#include "osal/etSema.h"
#include "etDatatypes.h"
#include "debugging/etMSCLogger.h"
#include "debugging/etLogger.h"
void etSema_construct(etSema* self){
ET_MSC_LOGGER_SYNC_ENTRY("etSema", "construct")
if (sem_init(&(self->osData), 0, 0) == -1) {
/* handle error */
etLogger_logError("etSema_construct: error\n");
}
ET_MSC_LOGGER_SYNC_EXIT
}
void etSema_destruct(etSema* self){
ET_MSC_LOGGER_SYNC_ENTRY("etSema", "destruct")
sem_destroy(&(self->osData));
ET_MSC_LOGGER_SYNC_EXIT
}
void etSema_wakeup(etSema* self){
ET_MSC_LOGGER_SYNC_ENTRY("etSema", "wakeup")
{
#ifdef DEBUG_SEMA
int sval = 0;
sem_getvalue(&(self->osData), &sval);
printf("etSema_wakeup: %p before post val=%d\n", (void*)self, sval);
#endif
sem_post(&(self->osData));
#ifdef DEBUG_SEMA
sem_getvalue(&(self->osData), &sval);
printf("etSema_wakeup: %p after post val=%d\n", (void*)self, sval);
fflush(stdout);
#endif
}
ET_MSC_LOGGER_SYNC_EXIT
}
void etSema_waitForWakeup(etSema* self){
ET_MSC_LOGGER_SYNC_ENTRY("etSema", "waitForWakeup")
{
int again = ET_FALSE;
#ifdef DEBUG_SEMA
printf("etSema_waitForWakeup: %p wait %ld\n", (void*)self, pthread_self()); fflush(stdout);
#endif
do {
errno = 0;
again = ET_FALSE;
if (sem_wait(&(self->osData))==-1) {
if (errno==EINTR) {
again = ET_TRUE;
#ifdef DEBUG_SEMA
printf("etSema_waitForWakeup: %p interrupted - again %ld (val=%d)\n", (void*)self, pthread_self(), sval); fflush(stdout);
#endif
}
}
}
while (again);
#ifdef DEBUG_SEMA
printf("etSema_waitForWakeup: %p waked up %ld\n", (void*)self, pthread_self()); fflush(stdout);
#endif
}
ET_MSC_LOGGER_SYNC_EXIT
}
|
