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-.\" Copyright (c) 2003 Sergey Osokin <osa@FreeBSD.org.ru>
-.\" 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 April 11, 2003
-.Dt PTHREAD_GETCONCURRENCY 3
-.Os
-.Sh NAME
-.Nm pthread_getconcurrency ,
-.Nm pthread_setconcurrency
-.Nd get or set level of concurrency
-.Sh LIBRARY
-.Lb libc_r
-.Sh SYNOPSIS
-.In pthread.h
-.Ft int
-.Fn pthread_getconcurrency void
-.Ft int
-.Fn pthread_setconcurrency "int new_level"
-.Sh DESCRIPTION
-The
-.Fn pthread_getconcurrency
-function allows an application to inform the threads implementation
-of its desired concurrency level,
-.Fa new_level .
-The actual level of concurrency provided by the implementation
-as a result of this function call is unspecified.
-If
-.Fa new_level
-is zero, it causes the implementation to maintain the concurrency
-level at its discretion as if
-.Fn pthread_setconcurrency
-was never called.
-The
-.Fn pthread_getconcurrency
-function returns the value set by a previous call to the
-.Fn pthread_setconcurrency
-function.
-If the
-.Fn pthread_setconcurrency
-function was not previously called, this function returns zero to
-indicate that the implementation is maintaining the concurrency
-level.
-When an application calls
-.Fn pthread_setconcurrency ,
-it is informing the implementation of its desired concurrency
-level.
-The implementation uses this as a hint, not a requirement.
-.Sh RETURN VALUES
-If successful, the
-.Fn pthread_setconcurrency
-function returns zero.
-Otherwise, an error number is returned
-to indicate the error.
-The
-.Fn pthread_getconcurrency
-function always returns the concurrency level set by a previous
-call to
-.Fn pthread_setconcurrency .
-If the
-.Fn pthread_setconcurrency
-function has never been called,
-.Fn pthread_getconcurrency
-returns zero.
-.Sh ERRORS
-The
-.Fn pthread_setconcurrency
-function will fail if:
-.Bl -tag -width Er
-.It Bq Er EINVAL
-The value specified by
-.Fa new_level
-is negative.
-.It Bq Er EAGAIN
-The value specified by
-.Fa new_level
-would cause a system resource to be exceeded.
-.El
-.Sh APPLICATION USAGE
-Use of these functions changes the state of the underlying
-concurrency upon which the application depends.
-Library developers are advised to not use the
-.Fn pthread_getconcurrency
-and
-.Fn pthread_setconcurrency
-functions since their use may conflict with an application's
-use of these functions.
-.Sh STANDARDS
-The
-.Fn pthread_getconcurrency
-and
-.Fn pthread_setconcurrency
-functions conform to
-.St -susv2 .
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