mtx_lock(3)		   Library Functions Manual		   mtx_lock(3)

NAME
     mtx_lock – acquire a mutex

SYNOPSIS
     library “threads”
     #include <threads.h>

     int
     mtx_lock(mtx_t *mtx);

DESCRIPTION
     The function mtx_lock() will acquire a mutex mtx.	If the mutex is
     already acquired by an other thread the function will wait until the
     mutex can be acquired.

     If the mutex is already being held by the current thread and locking
     recursion was not specified to mtx_init(3) the thread will be in a
     deadlock. If recursion is enabled the thread will acquire an additional
     instance of the mutex.  In this case to unlock the mutex mtx_unlock(3)
     must be called an equal number of times as mtx_lock(), mtx_trylock(3) or
     mtx_timedlock(3) have been called from the same thread on the same mutex,
     in order to unlock the mutex for other threads.

RETURN VALUES
     Upon success mtx_lock() will return thrd_success.	In case of error
     thrd_error will be returned.

SEE ALSO
     mtx_init(3) mtx_destroy(3) mtx_unlock(3) mtx_trylock(3) mtx_timedlock(3)

HISTORY
     The mtx_lock() function first appeared in the C11 standard ISO/IEC
     9899:2011.

AUTHORS
     Jan Adelsbach <jan@jadelsbach.de>


Debian				  May 9, 2020				Debian