Use the pthread_spin_unlock(3C) function to release a locked spin lock.
int pthread_spin_unlock(pthread_spinlock_t *lock);
#include <pthread.h> pthread_spinlock_t lock; int ret; ret = pthread_spin_unlock(&lock); /* spinlock is unlocked */
Upon successful completion, the pthread_spin_unlock() function returns 0. Otherwise, one of the following error codes is returned.
EPERM
Description: The calling thread does not hold the lock.
EINVAL
Description: The value specified by lock does not refer to an initialized spin lock object.