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pthread_spin_unlock - unlock a spin lock object
cc -mt [ flag... ] file... [ library... ] #include <pthread.h> int pthread_spin_unlock(pthread_spinlock_t *lock);
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.
Upon successful completion, the pthread_spin_unlock() function returns 0. Otherwise, an error number shall be returned to indicate the error.
The pthread_spin_unlock() function will fail if:
EINVAL
EPERM
See attributes(5) for descriptions of the following attributes:
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pthread_spin_destroy(3C), pthread_spin_lock(3C), attributes(5), standards(5)
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