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Remove the unused & broken PyThread_*_sema() functions and related constants.

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This closes SF patch #504215.
This commit is contained in:
Fred Drake 2002-01-19 22:02:55 +00:00
parent 72c3bf076f
commit 7bb1c9a11d
11 changed files with 0 additions and 557 deletions
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98
Python/thread_pthread.h
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@ -405,101 +405,3 @@ PyThread_release_lock(PyThread_type_lock lock)
status = pthread_cond_signal( &thelock->lock_released );
CHECK_STATUS("pthread_cond_signal");
}
/*
* Semaphore support.
*/
struct semaphore {
pthread_mutex_t mutex;
pthread_cond_t cond;
int value;
};
PyThread_type_sema
PyThread_allocate_sema(int value)
{
struct semaphore *sema;
int status, error = 0;
dprintf(("PyThread_allocate_sema called\n"));
if (!initialized)
PyThread_init_thread();
sema = (struct semaphore *) malloc(sizeof(struct semaphore));
if (sema != NULL) {
sema->value = value;
status = pthread_mutex_init(&sema->mutex,
pthread_mutexattr_default);
CHECK_STATUS("pthread_mutex_init");
status = pthread_cond_init(&sema->cond,
pthread_condattr_default);
CHECK_STATUS("pthread_cond_init");
if (error) {
free((void *) sema);
sema = NULL;
}
}
dprintf(("PyThread_allocate_sema() -> %p\n", sema));
return (PyThread_type_sema) sema;
}
void
PyThread_free_sema(PyThread_type_sema sema)
{
int status, error = 0;
struct semaphore *thesema = (struct semaphore *) sema;
dprintf(("PyThread_free_sema(%p) called\n", sema));
status = pthread_cond_destroy(&thesema->cond);
CHECK_STATUS("pthread_cond_destroy");
status = pthread_mutex_destroy(&thesema->mutex);
CHECK_STATUS("pthread_mutex_destroy");
free((void *) thesema);
}
int
PyThread_down_sema(PyThread_type_sema sema, int waitflag)
{
int status, error = 0, success;
struct semaphore *thesema = (struct semaphore *) sema;
dprintf(("PyThread_down_sema(%p, %d) called\n", sema, waitflag));
status = pthread_mutex_lock(&thesema->mutex);
CHECK_STATUS("pthread_mutex_lock");
if (waitflag) {
while (!error && thesema->value <= 0) {
status = pthread_cond_wait(&thesema->cond,
&thesema->mutex);
CHECK_STATUS("pthread_cond_wait");
}
}
if (error)
success = 0;
else if (thesema->value > 0) {
thesema->value--;
success = 1;
}
else
success = 0;
status = pthread_mutex_unlock(&thesema->mutex);
CHECK_STATUS("pthread_mutex_unlock");
dprintf(("PyThread_down_sema(%p) return\n", sema));
return success;
}
void
PyThread_up_sema(PyThread_type_sema sema)
{
int status, error = 0;
struct semaphore *thesema = (struct semaphore *) sema;
dprintf(("PyThread_up_sema(%p)\n", sema));
status = pthread_mutex_lock(&thesema->mutex);
CHECK_STATUS("pthread_mutex_lock");
thesema->value++;
status = pthread_cond_signal(&thesema->cond);
CHECK_STATUS("pthread_cond_signal");
status = pthread_mutex_unlock(&thesema->mutex);
CHECK_STATUS("pthread_mutex_unlock");
}