MUTEX_UNLOCK(9) Mutex API reference MUTEX_UNLOCK(9)NAME
mutex_unlock - release the mutex
SYNOPSIS
void __sched mutex_unlock(struct mutex * lock);
ARGUMENTS
lock
the mutex to be released
DESCRIPTION
Unlock a mutex that has been locked by this task previously.
This function must not be used in interrupt context. Unlocking of a not locked mutex is not allowed.
This function is similar to (but not equivalent to) up.
AUTHOR
Rusty Russell <rusty@rustcorp.com.au>
Author.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 MUTEX_UNLOCK(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
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tis_mutex_trylock(3)