.\" $NetBSD: pthread_condattr.3,v 1.11 2016/07/05 10:04:17 wiz Exp $ .\" .\" Copyright (c) 2002 The NetBSD Foundation, Inc. .\" 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 NETBSD FOUNDATION, INC. 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. 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Redistributions of source code must retain the above copyright .\" notice(s), this list of conditions and the following disclaimer as .\" the first lines of this file unmodified other than the possible .\" addition of one or more copyright notices. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice(s), 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 COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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: src/lib/libpthread/man/pthread_condattr.3,v 1.10 2002/09/16 19:29:28 mini Exp $ .Dd June 12, 2016 .Dt PTHREAD_CONDATTR 3 .Os .Sh NAME .Nm pthread_condattr_init , .Nm pthread_condattr_getpshared , .Nm pthread_condattr_setpshared , .Nm pthread_condattr_getclock , .Nm pthread_condattr_setclock .Nd condition attribute operations .Sh LIBRARY .Lb libpthread .Sh SYNOPSIS .In pthread.h .Ft int .Fn pthread_condattr_init "pthread_condattr_t *attr" .Ft int .Fn pthread_condattr_getclock "const pthread_condattr_t *__restrict attr" \ "clockid_t * __restrict clock_id" .Ft int .Fn pthread_condattr_setclock "pthread_condattr_t *attr" "clockid_t clock" .Ft int .Fn pthread_condattr_destroy "pthread_condattr_t *attr" .Ft int .Fn pthread_condattr_getpshared "const pthread_condattr_t * __restrict attr" "int * __restrict pshared" .Ft int .Fn pshared_condattr_setpshared "pthread_condattr_t *attr" "int pshared" .Sh DESCRIPTION Condition attribute objects are used to specify parameters to the .Xr pthread_cond_init 3 function. The .Fn pthread_condattr_init function initializes a condition attribute object with the default attributes and the .Fn pthread_condattr_destroy function destroys a condition attribute object. The .Fn pthread_condattr_getclock function shall obtain the value of the .Fa clock attributes object referenced by .Fa attr . The .Fn pthread_condattr_setclock function sets the system clock to be used for time comparisons to the one specified in .Fa clock . Valid clock values are .Dv CLOCK_MONOTONIC and .Dv CLOCK_REALTIME (the default). The .Fn pthread_condattr_getpshared function shall obtain the value of the process-shared attribute from the attributes object referenced by .Fa attr . The .Fn pthread_condattr_setpshared function shall set the process-shared attribute in an initialized attributes object referenced by .Fa attr . .Sh RETURN VALUES If successful, these functions return 0. Otherwise, an error number is returned to indicate the error. .Sh ERRORS No errors are defined for .Fn pthread_condattr_init . .Pp The .Fn pthread_condattr_destroy function may fail if: .Bl -tag -width Er .It Bq Er EINVAL The value specified by .Fa attr is invalid. .El .Pp The .Fn pthread_condattr_getclock and .Fn pthread_condattr_setclock may fail if: .Bl -tag -width Er .It Bq Er EINVAL The value specified by .Fa attr is invalid. .El .Pp The .Fn pthread_condattr_getpshared and .Fn pthread_condattr_setpshared may fail if: .Bl -tag -width Er .It Bq Er EINVAL The value specified by .Fa attr is invalid. .El .Sh SEE ALSO .Xr pthread_cond_init 3 .Sh STANDARDS Both functions conform to .St -p1003.1-2001 . .Sh CAVEATS The usefulness of the functions is questionable as the .Nx implementation does not support any non-default attributes. These functions do not conform to the .St -p1003.1-2008 revision of the standard, which mandates two additional attributes, the clock attribute and the process-shared attribute. .Sh BUGS The .Fn pthread_condattr_getpshared and .Fn pthread_condattr_setpshared functions are hidden by default since only thread shared attributes are supported.