113 lines
3.3 KiB
Groff
113 lines
3.3 KiB
Groff
.\" Copyright (c) 2003 Michael Telahun Makonnen
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd December 30, 2003
|
|
.Dt PTHREAD_MUTEX_TIMEDLOCK 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pthread_mutex_timedlock
|
|
.Nd lock a mutex without blocking indefinitely
|
|
.Sh LIBRARY
|
|
.Lb libpthread
|
|
.Sh SYNOPSIS
|
|
.In pthread.h
|
|
.In time.h
|
|
.Ft int
|
|
.Fn pthread_mutex_timedlock "pthread_mutex_t *mutex" "const struct timespec *abs_timeout"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn pthread_mutex_timedlock
|
|
function will lock
|
|
.Fa 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.
|
|
.Sh IMPLEMENTATION NOTES
|
|
The
|
|
.Fn pthread_mutex_timedlock
|
|
function is only available in
|
|
.Lb libkse
|
|
and
|
|
.Lb libthr .
|
|
This function is not implemented in
|
|
.Lb libc_r .
|
|
.Sh RETURN VALUES
|
|
If successful,
|
|
.Fn pthread_mutex_timedlock
|
|
will return zero, otherwise an error number will be returned to
|
|
indicate the error.
|
|
.Sh ERRORS
|
|
The
|
|
.Fn pthread_mutex_timedlock
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
The
|
|
.Fa mutex
|
|
was created with the protocol attribute having the
|
|
value PTHREAD_PRIO_PROTECT and
|
|
the calling thread's priority is higher than the
|
|
mutex's current priority ceiling.
|
|
.It Bq Er EINVAL
|
|
The process or thread would have blocked, and
|
|
.Fa abs_timeout
|
|
specified a nanosecond value less than zero or
|
|
greater than or equal to 1 billion.
|
|
.It Bq Er EINVAL
|
|
The
|
|
.Fa mutex
|
|
parameter is invalid.
|
|
.It Bq Er ETIMEDOUT
|
|
The
|
|
.Fa mutex
|
|
could not be locked before the timeout expired.
|
|
.It Bq Er EAGAIN
|
|
The
|
|
.Fa mutex
|
|
could not be acquired because the
|
|
maximum number of recursive locks for the
|
|
.Fa mutex
|
|
has been exceeded.
|
|
.It Bq Er EDEADLK
|
|
The current thread already owns the
|
|
.Fa mutex .
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr pthread_mutex_destroy 3 ,
|
|
.Xr pthread_mutex_init 3 ,
|
|
.Xr pthread_mutex_lock 3 ,
|
|
.Xr pthread_mutex_trylock 3 ,
|
|
.Xr pthread_mutex_unlock 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn pthread_mutex_timedlock
|
|
function is expected to conform to
|
|
.St -p1003.1-96 .
|