mtx_trylock(3)		   Library Functions Manual		mtx_trylock(3)

NAME
     mtx_trylock – attempt to acquire a mutex

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

     int
     mtx_trylock(mtx_t *mtx);

DESCRIPTION
     The function mtx_trylock() will attempt to acquire a mutex mtx if it has
     not been acquired already by an other thread.

     If the mutex is already held by the current thread and locking recursion
     was specified in mtx_init(3) an additional instance of the mutex will be
     acquired in the current thread.  In this case to unlock the mutex
     mtx_unlock(3) must be called an equal number of times as mtx_trylock(),
     mtx_lock(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_trylock() will return thrd_success if the mutex has been
     acquired or thrd_busy if the mutex is being held by an other thread.  In
     case of error thrd_error will be returned.

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

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

AUTHORS
     Jan Adelsbach <jan@jadelsbach.de>


Debian				  May 9, 2020				Debian