XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync_os, xbt, "Synchronization mechanism (OS-level)");
-/* use named semaphore when sem_init() does not work */
-#if !HAVE_SEM_INIT
-static int next_sem_ID = 0;
-static xbt_os_mutex_t next_sem_ID_lock;
-#endif
-
typedef struct xbt_os_thread_ {
pthread_t t;
char *name;
void *param;
pvoid_f_pvoid_t start_routine;
- void *extra_data;
} s_xbt_os_thread_t;
static xbt_os_thread_t main_thread = NULL;
main_thread->name = xbt_strdup("main");
main_thread->param = NULL;
main_thread->start_routine = NULL;
- main_thread->extra_data = NULL;
if ((errcode = pthread_setspecific(xbt_self_thread_key, main_thread)))
THROWF(system_error, errcode,
pthread_attr_init(&thread_attr);
thread_mod_inited = 1;
-
-#if !HAVE_SEM_INIT
- next_sem_ID_lock = xbt_os_mutex_init();
-#endif
}
void xbt_os_thread_mod_postexit(void)
free(main_thread);
main_thread = NULL;
thread_mod_inited = 0;
-#if !HAVE_SEM_INIT
- xbt_os_mutex_destroy(next_sem_ID_lock);
-#endif
}
/** Calls pthread_atfork() if present, and raise an exception otherwise.
return t->start_routine(t->param);
}
-xbt_os_thread_t xbt_os_thread_create(const char *name, pvoid_f_pvoid_t start_routine, void *param, void *extra_data)
+xbt_os_thread_t xbt_os_thread_create(const char* name, pvoid_f_pvoid_t start_routine, void* param)
{
xbt_os_thread_t res_thread = xbt_new(s_xbt_os_thread_t, 1);
res_thread->name = xbt_strdup(name);
res_thread->start_routine = start_routine;
res_thread->param = param;
- res_thread->extra_data = extra_data;
int errcode = pthread_create(&(res_thread->t), &thread_attr, wrapper_start_routine, res_thread);
xbt_assert(errcode == 0, "pthread_create failed: %s", strerror(errcode));
xbt_assert(errcode == 0, "pthread_mutex_destroy(%p) failed: %s", mutex, strerror(errcode));
free(mutex);
}
-
-typedef struct xbt_os_sem_ {
-#if !HAVE_SEM_INIT
- char *name;
-#endif
- sem_t s;
- sem_t *ps;
-} s_xbt_os_sem_t;
-
-#ifndef SEM_FAILED
-#define SEM_FAILED (-1)
-#endif
-
-xbt_os_sem_t xbt_os_sem_init(unsigned int value)
-{
- xbt_os_sem_t res = xbt_new(s_xbt_os_sem_t, 1);
-
- /* On some systems (macOS), only the stub of sem_init is to be found.
- * Any attempt to use it leads to ENOSYS (function not implemented).
- * If such a prehistoric system is detected, do the job with sem_open instead
- */
-#if HAVE_SEM_INIT
- if (sem_init(&(res->s), 0, value) != 0)
- THROWF(system_error, errno, "sem_init() failed: %s", strerror(errno));
- res->ps = &(res->s);
-
-#else /* damn, no sem_init(). Reimplement it */
-
- xbt_os_mutex_acquire(next_sem_ID_lock);
- res->name = bprintf("/sg-%d", ++next_sem_ID);
- xbt_os_mutex_release(next_sem_ID_lock);
-
- sem_unlink(res->name);
- res->ps = sem_open(res->name, O_CREAT, 0644, value);
- if ((res->ps == (sem_t *) SEM_FAILED) && (errno == ENAMETOOLONG)) {
- /* Old darwins only allow 13 chars. Did you create *that* amount of semaphores? */
- res->name[13] = '\0';
- sem_unlink(res->name);
- res->ps = sem_open(res->name, O_CREAT, 0644, value);
- }
- if (res->ps == (sem_t *) SEM_FAILED)
- THROWF(system_error, errno, "sem_open() failed: %s", strerror(errno));
-
- /* Remove the name from the semaphore namespace: we never join on it */
- if (sem_unlink(res->name) < 0)
- THROWF(system_error, errno, "sem_unlink() failed: %s",
- strerror(errno));
-
-#endif
-
- return res;
-}
-
-void xbt_os_sem_acquire(xbt_os_sem_t sem)
-{
- if (sem_wait(sem->ps) < 0)
- THROWF(system_error, errno, "sem_wait() failed: %s", strerror(errno));
-}
-
-void xbt_os_sem_release(xbt_os_sem_t sem)
-{
- if (sem_post(sem->ps) < 0)
- THROWF(system_error, errno, "sem_post() failed: %s", strerror(errno));
-}
-
-void xbt_os_sem_destroy(xbt_os_sem_t sem)
-{
-#if HAVE_SEM_INIT
- if (sem_destroy(sem->ps) < 0)
- THROWF(system_error, errno, "sem_destroy() failed: %s", strerror(errno));
-#else
- if (sem_close(sem->ps) < 0)
- THROWF(system_error, errno, "sem_close() failed: %s", strerror(errno));
- xbt_free(sem->name);
-#endif
- xbt_free(sem);
-}
-
-void xbt_os_thread_set_extra_data(void *data)
-{
- xbt_os_thread_self()->extra_data = data;
-}
-
-void *xbt_os_thread_get_extra_data(void)
-{
- xbt_os_thread_t thread = xbt_os_thread_self();
- return thread ? thread->extra_data : NULL;
-}
