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(7) 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(7),
standards(7)


January 30, 2004 PTHREAD_SPIN_LOCK(3C)