# mtx_lock

From cppreference.com
< c‎ | thread

Defined in header `<threads.h>` |  |
int mtx_lock( mtx_t * mutex ); |  | (since C11)

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

- C11 standard (ISO/IEC 9899:2011):

  - 7.26.4.3 The mtx_lock function (p: 381)

### See also

mtx_timedlock (C11) | blocks until locks a mutex or times out (function)
mtx_trylock (C11) | locks a mutex or returns without blocking if already locked (function)
mtx_unlock (C11) | unlocks a mutex (function)

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=c/thread/mtx_lock&oldid=97788"