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fixed futures (processor-count) on OS X (was previously always returning 1)

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svn: r16924
This commit is contained in:
James Swaine 2009-11-20 16:41:07 +00:00
parent 9367b1bbad
commit 074450e268
1 changed files with 6 additions and 17 deletions
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17
src/mzscheme/src/future.c
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@ -612,6 +612,7 @@ Scheme_Object *touch(int argc, Scheme_Object *argv[])
#ifdef linux
#include <unistd.h>
#elif OS_X
#include <sys/param.h>
#include <sys/sysctl.h>
#elif WINDOWS
#include <windows.h>
@ -625,24 +626,12 @@ Scheme_Object *processor_count(int argc, Scheme_Object *argv[])
#ifdef linux
cpucount = sysconf(_SC_NPROCESSORS_ONLN);
#elif OS_X
int mib[4];
size_t len;
size_t size = sizeof(cpucount) ;
/* set the mib for hw.ncpu */
mib[0] = CTL_HW;
mib[1] = HW_AVAILCPU; // alternatively, try HW_NCPU;
/* get the number of CPUs from the system */
sysctl(mib, 2, &cpucount, &len, NULL, 0);
if (cpucount < 1)
{
mib[1] = HW_NCPU;
sysctl(mib, 2, &cpucount, &len, NULL, 0);
if(cpucount < 1)
if (sysctlbyname("hw.ncpu", &cpucount, &size, NULL, 0))
{
cpucount = 1;
}
}
#elif WINDOWS
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);