Add stub implementations of pthread_[gs]etconcurrency to libc_r and
libthr. No changes were made to libpthread by request of deischen, who will soon commit a real implementation for that library. PR: standards/50848 Submitted by: Sergey A. Osokin <osa@freebsd.org.ru> MFC after: 1 week
This commit is contained in:
jdp
parent
f781b4eab2
commit
6090151f12
@ -288,6 +288,8 @@ int pthread_getschedparam(pthread_t pthread, int *,
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struct sched_param *);
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int pthread_setschedparam(pthread_t, int,
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const struct sched_param *);
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int pthread_getconcurrency(void);
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int pthread_setconcurrency(int);
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__END_DECLS
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#endif
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@ -10,6 +10,7 @@ MAN+= pthread_attr.3 \
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pthread_cancel.3 \
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pthread_cleanup_pop.3 \
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pthread_cleanup_push.3 \
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pthread_getconcurrency.3 \
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pthread_condattr.3 \
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pthread_cond_broadcast.3 \
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pthread_cond_destroy.3 \
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@ -85,6 +86,7 @@ MLINKS+= \
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pthread_attr.3 pthread_attr_setstack.3 \
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pthread_attr.3 pthread_attr_setstackaddr.3 \
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pthread_attr.3 pthread_attr_setstacksize.3 \
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pthread_getconcurrency.3 pthread_setconcurrency.3 \
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pthread_condattr.3 pthread_condattr_init.3 \
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pthread_condattr.3 pthread_condattr_destroy.3 \
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pthread_multi_np.3 pthread_single_np.3 \
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107
lib/libc_r/man/pthread_getconcurrency.3
Normal file
107
lib/libc_r/man/pthread_getconcurrency.3
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@ -0,0 +1,107 @@
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.\" Copyright (c) 2003 Sergey Osokin <osa@FreeBSD.org.ru>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd April 11, 2003
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.Dt PTHREAD_GETCONCURRENCY 3
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.Os
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.Sh NAME
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.Nm pthread_getconcurrency,
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.Nm pthread_setconcurrency
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.Nd get or set level of concurrency
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.Sh LIBRARY
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.Lb libc_r
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.Sh SYNOPSIS
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.In pthread.h
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.Ft int
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.Fn pthread_getconcurrency "void"
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.Ft int
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.Fn pthread_setconcurrency "int new_level"
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.Sh DESCRIPTION
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The
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.Fn pthread_getconcurrency
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function allows an application to inform the threads implementation
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of its desired concurrency level,
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.Va new_level .
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The actual level of concurrency provided by the implementation
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as a result of this function call is unspecified. If new_level is
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zero, it causes the implementation to maintain the concurrency
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level at its discretion as if
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.Fn pthread_setconcurrency
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was never called. The
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.Fn pthread_getconcurrency
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function returns the value set by a previous call to the
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.Fn pthread_setconcurrency
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function. If the
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.Fn pthread_setconcurrency
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function was not previously called, this function returns zero to
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indicate that the implementation is maintaining the concurrency
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level. When an application calls
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.Fn pthread_setconcurrency
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it is informing the implementation of its desired concurrency
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level. The implementation uses this as a hint, not a requirement.
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.Sh RETURN VALUES
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If successful, the
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.Fn pthread_setconcurrency
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function returns zero. Otherwise, an error number is returned
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to indicate the error. The
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.Fn pthread_getconcurrency
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function always returns the concurrency level set by a previous
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call to
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.Fn pthread_setconcurrency .
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If the
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.Fn pthread_setconcurrency
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function has never been called,
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.Fn pthread_getconcurrency
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returns zero.
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.Sh ERRORS
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The
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.Fn pthread_setconcurrency
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The value specified by
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.Va new_level
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is negative.
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.It Bq Er EAGAIN
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The value specific by
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.Va new_level
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would cause a system resource to be exceeded.
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.El
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.Sh APPLICATION USAGE
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Use of these functions changes the state of the underlying
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concurrency upon which the application depends. Library
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developers are advised to not use the
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.Fn pthread_getconcurrency
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and
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.Fn pthread_setconcurrency
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functions since their use may conflict with an applications
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use of these functions.
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.Sh STANDARDS
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The
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.Fn pthread_getconcurrency
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and
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.Fn pthread_setconcurrency
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functions conform to
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.St -susv2
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@ -37,6 +37,7 @@ SRCS+= \
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uthread_cancel.c \
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uthread_clean.c \
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uthread_close.c \
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uthread_concurrency.c \
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uthread_cond.c \
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uthread_condattr_destroy.c \
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uthread_condattr_init.c \
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60
lib/libc_r/uthread/uthread_concurrency.c
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60
lib/libc_r/uthread/uthread_concurrency.c
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@ -0,0 +1,60 @@
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/*
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* Copyright (c) 2003 Sergey Osokin <osa@FreeBSD.org.ru>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Sergey Osokin.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY SERGEY OSOKIN AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <errno.h>
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static int current_concurrency = 0;
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__weak_reference(_pthread_getconcurrency, pthread_getconcurrency);
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__weak_reference(_pthread_setconcurrency, pthread_setconcurrency);
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int
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_pthread_getconcurrency(void)
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{
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return current_concurrency;
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}
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int
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_pthread_setconcurrency(int new_level)
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{
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int ret;
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if (new_level < 0) {
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ret = EINVAL;
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} else {
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current_concurrency = new_level;
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ret = 0;
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}
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return(ret);
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}
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@ -8,6 +8,7 @@ SRCS+= \
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thr_autoinit.c \
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thr_cancel.c \
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thr_clean.c \
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thr_concurrency.c \
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thr_cond.c \
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thr_condattr_destroy.c \
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thr_condattr_init.c \
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60
lib/libthr/thread/thr_concurrency.c
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60
lib/libthr/thread/thr_concurrency.c
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@ -0,0 +1,60 @@
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/*
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* Copyright (c) 2003 Sergey Osokin <osa@FreeBSD.org.ru>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Sergey Osokin.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY SERGEY OSOKIN AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <errno.h>
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static int current_concurrency = 0;
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__weak_reference(_pthread_getconcurrency, pthread_getconcurrency);
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__weak_reference(_pthread_setconcurrency, pthread_setconcurrency);
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int
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_pthread_getconcurrency(void)
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{
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return current_concurrency;
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}
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int
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_pthread_setconcurrency(int new_level)
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{
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int ret;
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if (new_level < 0) {
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ret = EINVAL;
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} else {
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current_concurrency = new_level;
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ret = 0;
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}
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return (ret);
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}
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107
share/man/man3/pthread_getconcurrency.3
Normal file
107
share/man/man3/pthread_getconcurrency.3
Normal file
@ -0,0 +1,107 @@
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.\" Copyright (c) 2003 Sergey Osokin <osa@FreeBSD.org.ru>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd April 11, 2003
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.Dt PTHREAD_GETCONCURRENCY 3
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.Os
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.Sh NAME
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.Nm pthread_getconcurrency,
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.Nm pthread_setconcurrency
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.Nd get or set level of concurrency
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.Sh LIBRARY
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.Lb libc_r
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.Sh SYNOPSIS
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.In pthread.h
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.Ft int
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.Fn pthread_getconcurrency "void"
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.Ft int
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.Fn pthread_setconcurrency "int new_level"
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.Sh DESCRIPTION
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The
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.Fn pthread_getconcurrency
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function allows an application to inform the threads implementation
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of its desired concurrency level,
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.Va new_level .
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The actual level of concurrency provided by the implementation
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as a result of this function call is unspecified. If new_level is
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zero, it causes the implementation to maintain the concurrency
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level at its discretion as if
|
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.Fn pthread_setconcurrency
|
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was never called. The
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.Fn pthread_getconcurrency
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function returns the value set by a previous call to the
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.Fn pthread_setconcurrency
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function. If the
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.Fn pthread_setconcurrency
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function was not previously called, this function returns zero to
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indicate that the implementation is maintaining the concurrency
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level. When an application calls
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.Fn pthread_setconcurrency
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it is informing the implementation of its desired concurrency
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level. The implementation uses this as a hint, not a requirement.
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.Sh RETURN VALUES
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If successful, the
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.Fn pthread_setconcurrency
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function returns zero. Otherwise, an error number is returned
|
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to indicate the error. The
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.Fn pthread_getconcurrency
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function always returns the concurrency level set by a previous
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call to
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.Fn pthread_setconcurrency .
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If the
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.Fn pthread_setconcurrency
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function has never been called,
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.Fn pthread_getconcurrency
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returns zero.
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.Sh ERRORS
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The
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.Fn pthread_setconcurrency
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The value specified by
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.Va new_level
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is negative.
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.It Bq Er EAGAIN
|
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The value specific by
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.Va new_level
|
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would cause a system resource to be exceeded.
|
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.El
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.Sh APPLICATION USAGE
|
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Use of these functions changes the state of the underlying
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concurrency upon which the application depends. Library
|
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developers are advised to not use the
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.Fn pthread_getconcurrency
|
||||
and
|
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.Fn pthread_setconcurrency
|
||||
functions since their use may conflict with an applications
|
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use of these functions.
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.Sh STANDARDS
|
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The
|
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.Fn pthread_getconcurrency
|
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and
|
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.Fn pthread_setconcurrency
|
||||
functions conform to
|
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.St -susv2
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Loading…
Reference in New Issue
Block a user