Versions

[{“Name”:“C11”,“GroupName”:null}]

Syntax

• #ifndef __STDC_NO_THREADS__
• # include <threads.h>
• #endif
• void call_once(once_flag *flag, void (*func)(void));
• int cnd_broadcast(cnd_t *cond);
• void cnd_destroy(cnd_t *cond);
• int cnd_init(cnd_t *cond);
• int cnd_signal(cnd_t *cond);
• int cnd_timedwait(cnd_t *restrict cond, mtx_t *restrict mtx, const struct timespec *restrict ts);
• int cnd_wait(cnd_t *cond, mtx_t *mtx);
• void mtx_destroy(mtx_t *mtx);
• int mtx_init(mtx_t *mtx, int type);
• int mtx_lock(mtx_t *mtx);
• int mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts);
• int mtx_trylock(mtx_t *mtx);
• int mtx_unlock(mtx_t *mtx);
• int thrd_create(thrd_t *thr, thrd_start_t func, void *arg);
• thrd_t thrd_current(void);
• int thrd_detach(thrd_t thr);
• int thrd_equal(thrd_t thr0, thrd_t thr1);
• _Noreturn void thrd_exit(int res);
• int thrd_join(thrd_t thr, int *res);
• int thrd_sleep(const struct timespec *duration, struct timespec* remaining);
• void thrd_yield(void);
• int tss_create(tss_t *key, tss_dtor_t dtor);
• void tss_delete(tss_t key);
• void *tss_get(tss_t key);
• int tss_set(tss_t key, void *val);

Remarks

C11 threads are an optional feature. Their absence can be tested with __STDC__NO_THREAD__. Currently (Jul 2016) this feature is not yet implemented by all C libraries that otherwise support C11.

C libraries that are known to support C11 threads are:

• musl

C libraries that don’t support C11 threads, yet:

• gnu libc

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