Acquiring a Spin Lock

Use the pthread_spin_lock(3C) to lock a spin lock. The calling thread acquires the lock if it is not held by another thread. Otherwise, the thread does not return from the pthread_spin_lock() call until the lock becomes available. The results are undefined if the calling thread holds the lock at the time the call is made.

pthread_spin_lock() Syntax

int  pthread_spin_lock(pthread_spinlock_t *lock);

#include <pthread.h>

pthread_spinlock_t lock;
int ret;

ret = pthread_ spin_lock(&lock); /* lock the spinlock */

pthread_spin_lock() Return Values

Upon successful completion, the pthread_spin_lock() function returns 0. Otherwise, one of the following error codes is returned.

EDEADLK

Description:

The current thread already owns the spin lock.

EINVAL

Description:

The value specified by lock does not refer to an initialized spin lock object.