pthread_mutex_trylock3
Attempt to lock a mutex without blocking
Usage
#include <pthread.h>
int
pthread_mutex_trylock(pthread_mutex_t *mutex);
Library
POSIX Threads Library (libpthread, -lpthread)
Overview
The pthread_mutex_trylock() function locks mutex. If the mutex is already locked, pthread_mutex_trylock() will not block waiting for the mutex, but will return an error condition.
Return values
If successful, pthread_mutex_trylock() will return zero, otherwise an error number will be returned to indicate the error.
Errors
The pthread_mutex_trylock() function will fail if:
- [EINVAL]
-
The value specified by mutex is invalid.
- [EBUSY]
-
Mutex is already locked.
- [EOWNERDEAD]
-
The argument mutex points to a robust mutex and the process containing the previous owning thread terminated while holding the mutex lock. The lock was granted to the caller and it is up to the new owner to make the state consistent.
- [ENOTRECOVERABLE]
-
The state protected by the mutex is not recoverable.
Releases
79 releases since FreeBSD 2.2.8-RELEASE; the text changed 42 times.