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Code Issues Releases Wiki Activity

Provide a helper function that can reset cgsems to zero.

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This commit is contained in:
Con Kolivas 2013-12-09 23:11:47 +11:00 committed by Noel Maersk
parent 155945094f
commit 9628207066
2 changed files with 29 additions and 0 deletions
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28
util.c
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@ -2599,6 +2599,25 @@ int _cgsem_mswait(cgsem_t *cgsem, int ms, const char *file, const char *func, co
/* We don't reach here */
return 0;
}
/* Reset semaphore count back to zero */
void cgsem_reset(cgsem_t *cgsem)
{
int ret, fd;
fd_set rd;
char buf;
fd = cgsem->pipefd[0];
FD_ZERO(&rd);
FD_SET(fd, &rd);
do {
struct timeval timeout = {0, 0};
ret = select(fd + 1, &rd, NULL, NULL, &timeout);
if (ret > 0)
ret = read(fd, &buf, 1);
} while (ret > 0);
}
#else
void _cgsem_init(cgsem_t *cgsem, const char *file, const char *func, const int line)
{
@ -2639,6 +2658,15 @@ int _cgsem_mswait(cgsem_t *cgsem, int ms, const char *file, const char *func, co
return 0;
}
void cgsem_reset(cgsem_t *cgsem)
{
int ret;
do {
ret = sem_trywait(cgsem);
} while (!ret);
}
void cgsem_destroy(cgsem_t *cgsem)
{
sem_destroy(cgsem);

1
util.h
View File

@ -138,6 +138,7 @@ void _cgsem_init(cgsem_t *cgsem, const char *file, const char *func, const int l
void _cgsem_post(cgsem_t *cgsem, const char *file, const char *func, const int line);
void _cgsem_wait(cgsem_t *cgsem, const char *file, const char *func, const int line);
int _cgsem_mswait(cgsem_t *cgsem, int ms, const char *file, const char *func, const int line);
void cgsem_reset(cgsem_t *cgsem);
void cgsem_destroy(cgsem_t *cgsem);
bool cg_completion_timeout(void *fn, void *fnarg, int timeout);