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Added CPU clock OS detection routine for Mac OS X

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git-svn-id: https://svn.code.sf.net/p/libcpuid/code/HEAD/libcpuid@48 3b4be424-7ac5-41d7-8526-f4ddcb85d872
This commit is contained in:
Veselin Georgiev 2009-01-08 16:38:39 +00:00
parent 82c5d8f66a
commit 1fe1729a1f
1 changed files with 14 additions and 0 deletions
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14
libcpuid/rdtsc.c
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@ -107,6 +107,19 @@ int cpu_clock_by_os(void)
return (int)result;
}
#else
#ifdef __APPLE__
#include <sys/types.h>
#include <sys/sysctl.h>
/* Assuming Mac OS X with hw.cpufrequency sysctl */
int cpu_clock_by_os(void)
{
long long result = -1;
size_t size = sizeof(result);
if (sysctlbyname("hw.cpufrequency", &result, &size, NULL, 0))
return -1;
return (int) (result / (long long) 1000000);
}
#else
/* Assuming Linux with /proc/cpuinfo */
int cpu_clock_by_os(void)
{
@ -129,6 +142,7 @@ int cpu_clock_by_os(void)
fclose(f);
return -1;
}
#endif /* __APPLE__ */
#endif /* _WIN32 */
/* Emulate doing useful CPU intensive work */