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Implement functions pthread_getaffinity_np and pthread_setaffinity_np to

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get and set thread's cpu affinity mask.
This commit is contained in:
David Xu 2008-03-03 09:16:29 +00:00
parent 861b026781
commit 57030e1071
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=176763
3 changed files with 78 additions and 1 deletions
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4
lib/libthr/pthread.map
View File

@ -117,8 +117,8 @@ FBSD_1.0 {
pthread_rwlockattr_getpshared;
pthread_rwlockattr_init;
pthread_rwlockattr_setpshared;
pthread_self;
pthread_set_name_np;
pthread_self;
pthread_setcancelstate;
pthread_setcanceltype;
pthread_setconcurrency;
@ -388,6 +388,8 @@ FBSDprivate_1.0 {
};
FBSD_1.1 {
pthread_getaffinity_np;
pthread_setaffinity_np;
pthread_mutex_getspinloops_np;
pthread_mutex_getyieldloops_np;
pthread_mutex_isowned_np;

1
lib/libthr/thread/Makefile.inc
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@ -4,6 +4,7 @@
.PATH: ${.CURDIR}/thread
SRCS+= \
thr_affinity.c \
thr_attr.c \
thr_barrier.c \
thr_barrierattr.c \

74
lib/libthr/thread/thr_affinity.c Normal file
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@ -0,0 +1,74 @@
/*
* Copyright (c) 2008, David Xu <davidxu@freebsd.org>
* 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 unmodified, 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 ``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 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.
*
* $FreeBSD$
*
*/
#include "namespace.h"
#include <pthread.h>
#include <sys/param.h>
#include <sys/cpuset.h>
#include "un-namespace.h"
#include "thr_private.h"
__weak_reference(_pthread_getaffinity_np, pthread_getaffinity_np);
__weak_reference(_pthread_setaffinity_np, pthread_setaffinity_np);
int
_pthread_setaffinity_np(pthread_t td, size_t cpusetsize, const cpuset_t *cpuset)
{
struct pthread *curthread = _get_curthread();
lwpid_t tid;
int error;
THR_THREAD_LOCK(curthread, td);
if (td->state == PS_DEAD) {
THR_THREAD_UNLOCK(curthread, td);
return (EINVAL);
}
tid = TID(td);
error = cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, tid,
cpusetsize, cpuset);
if (error == -1)
error = errno;
THR_THREAD_UNLOCK(curthread, td);
return (error);
}
int
_pthread_getaffinity_np(pthread_t td, size_t cpusetsize, cpuset_t *cpuset)
{
lwpid_t tid;
int error;
tid = TID(td);
error = cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, tid,
cpusetsize, cpuset);
if (error == -1)
error = errno;
return (error);
}