Defined in header <threads.h> | ||
|---|---|---|
int mtx_trylock( mtx_t *mutex ); | (since C11) |
Tries to lock the mutex pointed to by mutex without blocking. Returns immediately if the mutex is already locked.
Prior calls to mtx_unlock on the same mutex synchronize-with this operation (if this operation succeeds), and all lock/unlock operations on any given mutex form a single total order (similar to the modification order of an atomic)
| mutex | - | pointer to the mutex to lock |
thrd_success if successful, thrd_busy if the mutex has already been locked or due to a spurious failure to acquire an available mutex, thrd_error if an error occurs.
The following behavior-changing defect reports were applied retroactively to previously published C standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| DR 470 | C11 |
mtx_trylock was not allowed to fail spuriously | allowed |
|
(C11) | blocks until locks a mutex (function) |
|
(C11) | blocks until locks a mutex or times out (function) |
|
(C11) | unlocks a mutex (function) |
C++ documentation for mutex::try_lock |
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C++ documentation for timed_mutex::try_lock |
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C++ documentation for recursive_mutex::try_lock |
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C++ documentation for recursive_timed_mutex::try_lock |
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