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pthread_mutex_timedlock(3)

NAME

     pthread_mutex_timedlock -- lock a mutex without blocking indefinitely


LIBRARY

     POSIX Threads Library (libpthread, -lpthread)
     1:1 Threading Library (libthr, -lthr)


SYNOPSIS

     #include <pthread.h>
     #include <time.h>

     int
     pthread_mutex_timedlock(pthread_mutex_t *mutex,
	 const struct timespec *abs_timeout);


DESCRIPTION

     The pthread_mutex_timedlock() function will lock mutex.  If it is already
     locked the calling thread will block until the mutex becomes available or
     the timeout, specified by abs_timeout, expires.  The time of the timeout
     is an absolute time and is not relative to the current time.


RETURN VALUES

     If successful, pthread_mutex_timedlock() will return zero, otherwise an
     error number will be returned to indicate the error.


ERRORS

     The pthread_mutex_timedlock() function will fail if:

     [EINVAL]		The mutex was created with the protocol attribute hav-
			ing the value PTHREAD_PRIO_PROTECT and the calling
			thread's priority is higher than the mutex's current
			priority ceiling.

     [EINVAL]		The process or thread would have blocked, and
			abs_timeout specified a nanosecond value less than
			zero or greater than or equal to 1 billion.

     [EINVAL]		The mutex parameter is invalid.

     [ETIMEDOUT]	The mutex could not be locked before the timeout
			expired.

     [EAGAIN]		The mutex could not be acquired because the maximum
			number of recursive locks for the mutex has been
			exceeded.

     [EDEADLK]		The current thread already owns the mutex.


SEE ALSO

     pthread_mutex_destroy(3), pthread_mutex_init(3), pthread_mutex_lock(3),
     pthread_mutex_trylock(3), pthread_mutex_unlock(3)


STANDARDS

     The pthread_mutex_timedlock() function is expected to conform to ISO/IEC
     9945-1:1996 (``POSIX.1'').

FreeBSD 5.4		       December 30, 2003		   FreeBSD 5.4

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