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am cdf9ef0e: am 24214067: Merge "Add cache related sysconf queries"

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* commit 'cdf9ef0e55480d74a1b99d942c37b66f2a3f1cf5':
  Add cache related sysconf queries
This commit is contained in:
Tao Bao 2014-12-05 18:23:29 +00:00 committed by Android Git Automerger
commit 65907a22d8
2 changed files with 34 additions and 0 deletions
libc
bionic
sysconf.cpp
include/sys
sysconf.h

18
libc/bionic/sysconf.cpp

@ -178,6 +178,24 @@ long sysconf(int name) {
case _SC_XOPEN_STREAMS: return -1; // Obsolescent in POSIX.1-2008.
case _SC_XOPEN_UUCP: return -1;
// We do not have actual implementations for cache queries.
// It's valid to return 0 as the result is unknown.
case _SC_LEVEL1_ICACHE_SIZE: return 0;
case _SC_LEVEL1_ICACHE_ASSOC: return 0;
case _SC_LEVEL1_ICACHE_LINESIZE: return 0;
case _SC_LEVEL1_DCACHE_SIZE: return 0;
case _SC_LEVEL1_DCACHE_ASSOC: return 0;
case _SC_LEVEL1_DCACHE_LINESIZE: return 0;
case _SC_LEVEL2_CACHE_SIZE: return 0;
case _SC_LEVEL2_CACHE_ASSOC: return 0;
case _SC_LEVEL2_CACHE_LINESIZE: return 0;
case _SC_LEVEL3_CACHE_SIZE: return 0;
case _SC_LEVEL3_CACHE_ASSOC: return 0;
case _SC_LEVEL3_CACHE_LINESIZE: return 0;
case _SC_LEVEL4_CACHE_SIZE: return 0;
case _SC_LEVEL4_CACHE_ASSOC: return 0;
case _SC_LEVEL4_CACHE_LINESIZE: return 0;
default:
// Posix says EINVAL is the only error that shall be returned,
// but glibc uses ENOSYS.

16
libc/include/sys/sysconf.h

@ -172,6 +172,22 @@ __BEGIN_DECLS
#define _SC_XOPEN_STREAMS 0x008d
#define _SC_XOPEN_UUCP 0x008e
#define _SC_LEVEL1_ICACHE_SIZE 0x008f
#define _SC_LEVEL1_ICACHE_ASSOC 0x0090
#define _SC_LEVEL1_ICACHE_LINESIZE 0x0091
#define _SC_LEVEL1_DCACHE_SIZE 0x0092
#define _SC_LEVEL1_DCACHE_ASSOC 0x0093
#define _SC_LEVEL1_DCACHE_LINESIZE 0x0094
#define _SC_LEVEL2_CACHE_SIZE 0x0095
#define _SC_LEVEL2_CACHE_ASSOC 0x0096
#define _SC_LEVEL2_CACHE_LINESIZE 0x0097
#define _SC_LEVEL3_CACHE_SIZE 0x0098
#define _SC_LEVEL3_CACHE_ASSOC 0x0099
#define _SC_LEVEL3_CACHE_LINESIZE 0x009a
#define _SC_LEVEL4_CACHE_SIZE 0x009b
#define _SC_LEVEL4_CACHE_ASSOC 0x009c
#define _SC_LEVEL4_CACHE_LINESIZE 0x009d
long sysconf(int);
__END_DECLS