mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 19:00:09 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/* Copyright (C) 2020-2021 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, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <sys/auxv.h>
|
|
#include <stdbool.h>
|
|
|
|
static long int linux_sysconf (int name);
|
|
|
|
static inline bool
|
|
getauxval2_einval (unsigned long int type, unsigned long int *result)
|
|
{
|
|
if (__getauxval2 (type, result))
|
|
return true;
|
|
|
|
__set_errno (EINVAL);
|
|
|
|
return false;
|
|
}
|
|
|
|
static inline long int
|
|
sysconf_get_cache_associativity (unsigned long type)
|
|
{
|
|
unsigned long int result;
|
|
|
|
if (getauxval2_einval (type, &result))
|
|
return (result & 0xffff0000) >> 16;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static inline long int
|
|
sysconf_get_cache_linesize (unsigned long type)
|
|
{
|
|
unsigned long int result;
|
|
|
|
if (getauxval2_einval (type, &result))
|
|
return result & 0xffff;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static inline long int
|
|
sysconf_get_cache_size (unsigned long type)
|
|
{
|
|
unsigned long int result;
|
|
|
|
if (getauxval2_einval (type, &result))
|
|
return result;
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Get the value of the system variable NAME. */
|
|
long int
|
|
__sysconf (int name)
|
|
{
|
|
switch (name)
|
|
{
|
|
case _SC_LEVEL1_ICACHE_SIZE:
|
|
return sysconf_get_cache_size (AT_L1I_CACHESIZE);
|
|
case _SC_LEVEL1_ICACHE_ASSOC:
|
|
return sysconf_get_cache_associativity (AT_L1I_CACHEGEOMETRY);
|
|
case _SC_LEVEL1_ICACHE_LINESIZE:
|
|
return sysconf_get_cache_linesize (AT_L1I_CACHEGEOMETRY);
|
|
case _SC_LEVEL1_DCACHE_SIZE:
|
|
return sysconf_get_cache_size (AT_L1D_CACHESIZE);
|
|
case _SC_LEVEL1_DCACHE_ASSOC:
|
|
return sysconf_get_cache_associativity (AT_L1D_CACHEGEOMETRY);
|
|
case _SC_LEVEL1_DCACHE_LINESIZE:
|
|
return sysconf_get_cache_linesize (AT_L1D_CACHEGEOMETRY);
|
|
case _SC_LEVEL2_CACHE_SIZE:
|
|
return sysconf_get_cache_size (AT_L2_CACHESIZE);
|
|
case _SC_LEVEL2_CACHE_ASSOC:
|
|
return sysconf_get_cache_associativity (AT_L2_CACHEGEOMETRY);
|
|
case _SC_LEVEL2_CACHE_LINESIZE:
|
|
return sysconf_get_cache_linesize (AT_L2_CACHEGEOMETRY);
|
|
default:
|
|
return linux_sysconf (name);
|
|
}
|
|
}
|
|
|
|
/* Now the generic Linux version. */
|
|
#undef __sysconf
|
|
#define __sysconf static linux_sysconf
|
|
#include <sysdeps/unix/sysv/linux/sysconf.c>
|