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* posix/Makefile (routines): Add sched_cpucount.

Browse Source 
(tests): Add tst-cpucount.
	* posix/sched_cpucount.c: New file.
	* posix/tst-cpucount.c: New file.
	* posix/Versions: Export __sched_cpucount with version GLIBC_2.6.
This commit is contained in:
Ulrich Drepper 2007-04-03 23:29:18 +00:00
parent 9700b0390e
commit eab1bdfb8e
5 changed files with 92 additions and 2 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2007-04-03 Ulrich Drepper <drepper@redhat.com>
* posix/Makefile (routines): Add sched_cpucount.
(tests): Add tst-cpucount.
* posix/sched_cpucount.c: New file.
* posix/tst-cpucount.c: New file.
* posix/Versions: Export __sched_cpucount with version GLIBC_2.6.
2007-03-27 Jakub Jelinek <jakub@redhat.com>
* posix/fnmatch.c (STRUCT): Define.

4
posix/Makefile
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@ -66,7 +66,7 @@ routines := \
spawnattr_getsigmask spawnattr_getschedpolicy spawnattr_getschedparam \
spawnattr_setsigmask spawnattr_setschedpolicy spawnattr_setschedparam \
posix_madvise \
get_child_max
get_child_max sched_cpucount
include ../Makeconfig
@ -90,7 +90,7 @@ tests := tstgetopt testfnm runtests runptests \
tst-execv1 tst-execv2 tst-execl1 tst-execl2 \
tst-execve1 tst-execve2 tst-execle1 tst-execle2 \
tst-execvp3 tst-execvp4 tst-rfc3484 tst-rfc3484-2 \
tst-getaddrinfo3 tst-fnmatch2
tst-getaddrinfo3 tst-fnmatch2 tst-cpucount
xtests := bug-ga2
ifeq (yes,$(build-shared))
test-srcs := globtest

3
posix/Versions
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@ -122,6 +122,9 @@ libc {
GLIBC_2.3.4 {
regexec;
}
GLIBC_2.6 {
__sched_cpucount;
}
GLIBC_PRIVATE {
__libc_fork; __libc_pwrite;
}

52
posix/sched_cpucount.c Normal file
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@ -0,0 +1,52 @@
/* Copyright (C) 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <limits.h>
#include <sched.h>
int
__sched_cpucount (cpu_set_t *setp)
{
int s = 0;
for (unsigned int j = 0; j < __CPU_SETSIZE / __NCPUBITS; ++j)
{
__cpu_mask l = setp->__bits[j];
if (l == 0)
continue;
#if LONG_BIT > 32
l = (l & 0x5555555555555555ul) + ((l >> 1) & 0x5555555555555555ul);
l = (l & 0x3333333333333333ul) + ((l >> 2) & 0x3333333333333333ul);
l = (l & 0x0f0f0f0f0f0f0f0ful) + ((l >> 4) & 0x0f0f0f0f0f0f0f0ful);
l = (l & 0x00ff00ff00ff00fful) + ((l >> 8) & 0x00ff00ff00ff00fful);
l = (l & 0x0000ffff0000fffful) + ((l >> 16) & 0x0000ffff0000fffful);
l = (l & 0x00000000fffffffful) + ((l >> 32) & 0x00000000fffffffful);
#else
l = (l & 0x55555555ul) + ((l >> 1) & 0x55555555ul);
l = (l & 0x33333333ul) + ((l >> 2) & 0x33333333ul);
l = (l & 0x0f0f0f0ful) + ((l >> 4) & 0x0f0f0f0ful);
l = (l & 0x00ff00fful) + ((l >> 8) & 0x00ff00fful);
l = (l & 0x0000fffful) + ((l >> 16) & 0x0000fffful);
#endif
s += l;
}
return s;
}

27
posix/tst-cpucount.c Normal file
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@ -0,0 +1,27 @@
#include <sched.h>
#include <stdio.h>
static int
do_test (void)
{
cpu_set_t c;
CPU_ZERO (&c);
for (int cnt = 0; cnt < 130; ++cnt)
{
int n = CPU_COUNT (&c);
if (n != cnt)
{
printf ("expected %d, not %d\n", cnt, n);
return 1;
}
CPU_SET (cnt, &c);
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"