cnd_wait

 

C

Language

Standard Library

Type support

Dynamic memory management

Error handling

Program utilities

Date and time utilities

Strings library

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Numerics

Input/output support

Localization support

Thread support (C11)

Atomic operations (C11)

 

Thread support library

Threads
thrd_create thrd_equal thrd_current thrd_sleep thrd_yield thrd_exit	thrd_detach thrd_join thrd_successthrd_timedout thrd_busythrd_nomemthrd_error
Mutual exclusion
mtx_init mtx_lock mtx_timedlock mtx_trylock	mtx_unlock mtx_destroy mtx_types
Call once
ONCE_FLAG_INIT	call_once
Condition variables
cnd_init cnd_signal cnd_broadcast	cnd_wait cnd_timedwait cnd_destroy
Thread-local storage
thread_local TSS_DTOR_ITERATIONS tss_create	tss_get tss_set tss_delete

 

Defined in header <threads.h>
int cnd_wait( cnd_t* cond, mtx_t* mutex );		(since C11)

Atomically unlocks the mutex pointed to by mutex and blocks on the condition variable pointed to by cond until the thread is signalled by cnd_signal or cnd_broadcast. The mutex is locked again before the function returns.

The behavior is undefined if the mutex is not already locked by the calling thread.

Parameters

cond	-	pointer to the condition variable to block on
mutex	-	pointer to the mutex to unlock for the duration of the block

Return value

thrd_success if successful, thrd_error otherwise.

See also

cnd_timedwait (C11)

blocks on a condition variable, with a timeout (function)