1.\" Copyright (c) 2003 Michael Telahun Makonnen 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd August 7, 2019 28.Dt PTHREAD_MUTEX_TIMEDLOCK 3 29.Os 30.Sh NAME 31.Nm pthread_mutex_timedlock 32.Nd lock a mutex without blocking indefinitely 33.Sh LIBRARY 34.Lb libpthread 35.Sh SYNOPSIS 36.In pthread.h 37.In time.h 38.Ft int 39.Fn pthread_mutex_timedlock "pthread_mutex_t *restrict mutex" "const struct timespec *restrict abs_timeout" 40.Sh DESCRIPTION 41The 42.Fn pthread_mutex_timedlock 43function will lock 44.Fa mutex . 45If it is already locked the calling thread will block until 46the mutex becomes available or 47the timeout, 48specified by abs_timeout, 49expires. 50The time of the timeout is an absolute time and 51is not relative to the current time. 52.Sh RETURN VALUES 53If successful, 54.Fn pthread_mutex_timedlock 55will return zero, otherwise an error number will be returned to 56indicate the error. 57.Sh ERRORS 58The 59.Fn pthread_mutex_timedlock 60function will fail if: 61.Bl -tag -width Er 62.It Bq "Er ENOTRECOVERABLE" 63The 64.Fa mutex 65was created with the protocol attribute having the 66value PTHREAD_PRIO_PROTECT and 67the calling thread's priority is higher than the 68mutex's current priority ceiling. 69.It Bq Er EINVAL 70The process or thread would have blocked, and 71.Fa abs_timeout 72specified a nanosecond value less than zero or 73greater than or equal to 1 billion. 74.It Bq Er EINVAL 75The 76.Fa mutex 77parameter is invalid. 78.It Bq Er ETIMEDOUT 79The 80.Fa mutex 81could not be locked before the timeout expired. 82.It Bq Er EAGAIN 83The 84.Fa mutex 85could not be acquired because the 86maximum number of recursive locks for the 87.Fa mutex 88has been exceeded. 89.It Bq Er EDEADLK 90The current thread already owns the 91.Fa mutex . 92.It Bq Er EOWNERDEAD 93The argument 94.Fa mutex 95points to a robust mutex and the process containing the previous owning 96thread terminated while holding the mutex lock. 97The lock was granted to the caller and it is up to the new owner 98to make the state consistent. 99.It Bq Er ENOTRECOVERABLE 100The state protected by the 101.Fa mutex 102is not recoverable. 103.El 104.Sh SEE ALSO 105.Xr pthread_mutex_consistent 3 , 106.Xr pthread_mutex_destroy 3 , 107.Xr pthread_mutex_init 3 , 108.Xr pthread_mutex_lock 3 , 109.Xr pthread_mutex_trylock 3 , 110.Xr pthread_mutex_unlock 3 111.Sh STANDARDS 112The 113.Fn pthread_mutex_timedlock 114function is expected to conform to 115.St -p1003.1-96 . 116