mutex_trylock(9) [centos man page]
MUTEX_TRYLOCK(9) Mutex API reference MUTEX_TRYLOCK(9) NAME
mutex_trylock - try to acquire the mutex, without waiting SYNOPSIS
int __sched mutex_trylock(struct mutex * lock); ARGUMENTS
lock the mutex to be acquired DESCRIPTION
Try to acquire the mutex atomically. Returns 1 if the mutex has been acquired successfully, and 0 on contention. NOTE
this function follows the spin_trylock convention, so it is negated from the down_trylock return values! Be careful about this when converting semaphore users to mutexes. This function must not be used in interrupt context. The mutex must be released by the same task that acquired it. AUTHOR
Rusty Russell <rusty@rustcorp.com.au> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 MUTEX_TRYLOCK(9)
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tis_mutex_trylock(3) Library Functions Manual tis_mutex_trylock(3) NAME
tis_mutex_trylock - Attempts to lock the specified mutex. LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <tis.h> int tis_mutex_trylock( pthread_mutex_t *mutex); STANDARDS
None PARAMETERS
Address of the mutex (passed by reference) to be locked. DESCRIPTION
This routine attempts to lock the specified mutex mutex. When this routine is called, an attempt is made immediately to lock the mutex. If the mutex is successfully locked, zero (0) is returned. If the specified mutex is already locked when this routine is called, the caller does not wait for the mutex to become available. [EBUSY] is returned, and the thread does not wait to acquire the lock. RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows: Successful completion. The mutex is already locked; therefore, it was not acquired. The value specified by mutex is invalid. ERRORS
None RELATED INFORMATION
Functions: tis_mutex_destroy(3), tis_mutex_init(3), tis_mutex_lock(3), tis_mutex_unlock(3) Manuals: Guide to DECthreads and Programmer's Guide delim off tis_mutex_trylock(3)