mtx_lock

 

C

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Strings library

Algorithms

Numerics

Date and time utilities

Input/output support

Localization support

Concurrency support (哋它亢11)

Technical Specifications

Symbol index

 

Concurrency support library

Threads thrd_create thrd_equal thrd_current    thrd_sleep thrd_yield thrd_exit thrd_detach thrd_join thrd_successthrd_timedoutthrd_busythrd_nomemthrd_error    Atomic operations atomic_init ATOMIC_VAR_INIT (until 哋它亢23) ATOMIC_***_LOCK_FREE atomic_is_lock_free atomic_store atomic_load atomic_exchange atomic_compare_exchange atomic_fetch_add atomic_fetch_sub atomic_fetch_or atomic_fetch_xor atomic_fetch_and

Atomic flags atomic_flag ATOMIC_FLAG_INIT atomic_flag_test_and_set atomic_flag_clear Memory ordering memory_order kill_dependency atomic_thread_fence atomic_signal_fence Mutual exclusion mtx_init mtx_lock mtx_timedlock mtx_trylock call_once mtx_unlock mtx_destroy mtx_plainmtx_recursivemtx_timed 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 mtx_lock( mtx_t* mutex );		(since 哋它亢11)

Blocks the current thread until the mutex pointed to by mutex is locked.

The behavior is undefined if the current thread has already locked the mutex and the mutex is not recursive.

Prior calls to mtx_unlock on the same mutex synchronize-with this operation, and all lock/unlock operations on any given mutex form a single total order (similar to the modification order of an atomic)

Parameters

mutex

-

pointer to the mutex to lock

Return value

thrd_success if successful, thrd_error otherwise.

References

• 哋它亢17 standard (ISO/IEC 9899:2018):

• 7.26.4.3 The mtx_lock function (p: 278)

• 哋它亢11 standard (ISO/IEC 9899:2011):

• 7.26.4.3 The mtx_lock function (p: 381)

See also

mtx_timedlock (哋它亢11)	blocks until locks a mutex or times out (function)
mtx_trylock (哋它亢11)	locks a mutex or returns without blocking if already locked (function)
mtx_unlock (哋它亢11)	unlocks a mutex (function)