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52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
13 years ago
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#include "nvthread.h"
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#include "Thread.h"
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#define WIN32_LEAN_AND_MEAN
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#define VC_EXTRALEAN
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#include <windows.h>
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using namespace nv;
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// Find the number of cores in the system.
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// Based on: http://stackoverflow.com/questions/150355/programmatically-find-the-number-of-cores-on-a-machine
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// @@ Distinguish between logical and physical cores?
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uint nv::hardwareThreadCount() {
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#if NV_OS_WIN32
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SYSTEM_INFO sysinfo;
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GetSystemInfo( &sysinfo );
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return sysinfo.dwNumberOfProcessors;
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#elif NV_OS_XBOX
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return 3; // or 6?
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#elif NV_OS_LINUX // Linux, Solaris, & AIX
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return sysconf(_SC_NPROCESSORS_ONLN);
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#elif NV_OS_DARWIN || NV_OS_FREEBSD
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int numCPU;
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int mib[4];
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size_t len = sizeof(numCPU);
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// set the mib for hw.ncpu
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mib[0] = CTL_HW;
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mib[1] = HW_AVAILCPU; // alternatively, try HW_NCPU;
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// get the number of CPUs from the system
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sysctl(mib, 2, &numCPU, &len, NULL, 0);
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if (numCPU < 1) {
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mib[1] = HW_NCPU;
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sysctl( mib, 2, &numCPU, &len, NULL, 0 );
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if (numCPU < 1) {
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return 1; // Assume single core.
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}
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}
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return numCPU;
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#else
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return 1; // Assume single core.
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#endif
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}
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