Multithreaded Programming Guide

Trying to Acquire a Mutex

Use mutex_trylock(3C) to attempt to lock the mutex pointed to by mp. This function is a nonblocking version of mutex_lock(). For POSIX threads, see pthread_mutex_trylock Syntax.

mutex_trylock Syntax

#include <thread.h>

int mutex_trylock(mutex_t *mp);

mutex_trylock Return Values

mutex_trylock() returns 0 if successful. When any of the following conditions is detected, mutex_trylock() fails and returns the corresponding value.



mp points to an illegal address.



The system detected an attempt to reinitialize an active mutex.