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pthread_spin_trylock(3c) [sunos man page]

pthread_spin_lock(3C)					   Standard C Library Functions 				     pthread_spin_lock(3C)

NAME
pthread_spin_lock, pthread_spin_trylock - lock a spin lock object SYNOPSIS
cc -mt [ flag... ] file... [ library... ] #include <pthread.h> int pthread_spin_lock(pthread_spinlock_t *lock); #include <pthread.h> int pthread_spin_trylock(pthread_spinlock_t *lock); DESCRIPTION
The pthread_spin_lock() function locks the spin lock referenced by lock. The calling thread acquires the lock if it is not held by another thread. Otherwise, the thread spins (that is, 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. The pthread_spin_trylock() function locks the spin lock referenced by lock if it is not held by any thread. Otherwise, the function fails. The results are undefined if either of these functions is called with an uninitialized spin lock. RETURN VALUES
Upon successful completion, these functions returns 0. Otherwise, an error number is returned to indicate the error. ERRORS
The pthread_spin_trylock() function will fail if: EBUSY A thread currently holds the lock. These functions may fail if: EINVAL The value specified by lock does not refer to an initialized spin lock object. The pthread_spin_lock() function may fail if: EDEADLK The calling thread already holds the lock. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
pthread_spin_destroy(3C), pthread_spin_unlock(3C), attributes(5), standards(5) SunOS 5.10 30 Jan 2004 pthread_spin_lock(3C)

Check Out this Related Man Page

PTHREAD_SPIN_LOCK(3)					   BSD Library Functions Manual 				      PTHREAD_SPIN_LOCK(3)

NAME
pthread_spin_lock, pthread_spin_trylock, pthread_spin_unlock -- lock or unlock a spin lock LIBRARY
POSIX Threads Library (libpthread, -lpthread) SYNOPSIS
#include <pthread.h> int pthread_spin_lock(pthread_spinlock_t *lock); int pthread_spin_trylock(pthread_spinlock_t *lock); int pthread_spin_unlock(pthread_spinlock_t *lock); DESCRIPTION
The pthread_spin_lock() function will acquire lock if it is not currently owned by another thread. If the lock cannot be acquired immedi- ately, it will spin attempting to acquire the lock (it will not sleep) until it becomes available. The pthread_spin_trylock() function is the same as pthread_spin_lock() except that if it cannot acquire lock immediately it will return with an error. The pthread_spin_unlock() function will release lock, which must have been previously locked by a call to pthread_spin_lock() or pthread_spin_trylock(). RETURN VALUES
If successful, all these functions will return zero. Otherwise, an error number will be returned to indicate the error. None of these functions will return EINTR. ERRORS
The pthread_spin_lock(), pthread_spin_trylock() and pthread_spin_unlock() functions will fail if: [EINVAL] The value specified by lock is invalid or is not initialized. The pthread_spin_lock() function may fail if: [EDEADLK] The calling thread already owns the lock. The pthread_spin_trylock() function will fail if: [EBUSY] Another thread currently holds lock. The pthread_spin_unlock() function may fail if: [EPERM] The calling thread does not own lock. SEE ALSO
pthread_spin_destroy(3), pthread_spin_init(3) HISTORY
The pthread_spin_lock(), pthread_spin_trylock() and pthread_spin_unlock() functions first appeared in N:M Threading Library (libkse, -lkse) in FreeBSD 5.2, and in 1:1 Threading Library (libthr, -lthr) in FreeBSD 5.3. BUGS
The implementation of pthread_spin_lock(), pthread_spin_trylock() and pthread_spin_unlock() is expected to conform to IEEE Std 1003.2 (``POSIX.2''). BSD
January 22, 2004 BSD
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