man pages section 3: Basic Library Functions

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Updated: July 2014
 
 

pthread_spin_unlock(3C)

Name

pthread_spin_unlock - unlock a spin lock object

Synopsis

cc –mt [ flag... ] file... [ library... ]
#include <pthread.h>

int pthread_spin_unlock(pthread_spinlock_t *lock);

Description

The pthread_spin_unlock() function releases the spin lock referenced by lock which was locked with the pthread_spin_lock(3C) or pthread_spin_trylock(3C) functions. The results are undefined if the lock is not held by the calling thread. If there are threads spinning on the lock when pthread_spin_unlock () is called, the lock becomes available and an unspecified spinning thread acquires the lock.

The results are undefined if this function is called with an uninitialized thread spin lock.

Return Values

Upon successful completion, the pthread_spin_unlock() function returns 0. Otherwise, an error number shall be returned to indicate the error.

Errors

The pthread_spin_unlock() function will fail if:

EINVAL

An invalid argument was specified.

EPERM

The calling thread does not hold the lock.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT-Level
MT-Safe
Standard

See Also

pthread_spin_destroy(3C), pthread_spin_lock(3C), attributes(5), standards(5)