09-20-2010
Not sure. We use FC (for a million reasons).
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LEARN ABOUT OPENSOLARIS
pthread_mutex_reltimedlock_np
pthread_mutex_timedlock(3C) Standard C Library Functions pthread_mutex_timedlock(3C)
NAME
pthread_mutex_timedlock, pthread_mutex_reltimedlock_np - lock a mutex
SYNOPSIS
cc -mt [ flag... ] file... [ library... ]
#include <pthread.h>
#include <time.h>
int pthread_mutex_timedlock(pthread_mutex_t *restrict mutex,
const struct timespec *restrict abs_timeout);
int pthread_mutex_reltimedlock_np(pthread_mutex_t *restrict mutex,
const struct timespec *restrict rel_timeout);
DESCRIPTION
The pthread_mutex_timedlock() function locks the mutex object referenced by mutex. If the mutex is already locked, the calling thread
blocks until the mutex becomes available as in the pthread_mutex_lock(3C). If the mutex cannot be locked without waiting for another thread
to unlock the mutex, this wait is terminated when the specified timeout expires.
The pthread_mutex_reltimedlock_np() function is identical to the pthread_mutex_timedlock() function, except that the timeout is specified
as a relative time interval.
For pthread_mutex_timedlock(), the timeout expires when the absolute time specified by abs_timeout passes, as measured by the clock on
which timeouts are based (that is, when the value of that clock equals or exceeds abs_timeout), or if the absolute time specified by
abs_timeout has already been passed at the time of the call.
For pthread_mutex_reltimedlock_np(), the timeout expires when the time interval specified by rel_timeout passes, as measured by the
CLOCK_REALTIME clock, or if the time interval specified by rel_timeout is negative at the time of the call.
The resolution of the timeout is the resolution of the CLOCK_REALTIME clock. The timespec data type is defined in the <time.h>header.
Under no circumstance will either function fail with a timeout if the mutex can be locked immediately. The validity of the timeout parame-
ter is not checked if the mutex can be locked immediately.
As a consequence of the priority inheritance rules (for mutexes initialized with the PRIO_INHERIT protocol), if a timed mutex wait is ter-
minated because its timeout expires, the priority of the owner of the mutex is adjusted as necessary to reflect the fact that this thread
is no longer among the threads waiting for the mutex.
RETURN VALUES
Upon successful completion, the pthread_mutex_timedlock() and pthread_mutex_reltimedlock_np() functions return 0. Otherwise, an error num-
ber is returned to indicate the error.
ERRORS
The pthread_mutex_timedlock() and pthread_mutex_reltimedlock_np() functions will fail for the same reasons as pthread_mutex_lock(3C). In
addition, they will fail if:
EINVAL The caller would have blocked and the timeout parameter specified a nanoseconds field value less than zero or greater than or
equal to 1,000 million.
ETIMEDOUT The mutex could not be locked before the specified timeout expired.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |See below. |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
The pthread_mutex_timedlock() is Standard. The pthread_mutex_reltimedlock_np() function is Stable.
SEE ALSO
time(2), pthread_mutex_destroy(3C), pthread_mutex_lock(3C), pthread_mutex_trylock(3C), attributes(5), standards(5)
SunOS 5.11 5 Jun 2007 pthread_mutex_timedlock(3C)