50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
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#include <c_HardwareConcurrency.h>
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/* ================================================================================================================== */
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/* Cross-Platform OS Handle Interceptions */
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#if defined(_WIN32) || defined(_WIN64)
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#elif defined(__linux__) || defined(__ANDROID__) || defined(__hpux) || defined(_AIX)
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#include <unistd.h>
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#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#endif
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c_size_t c_HardwareConcurrency(void) {
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#if defined(_WIN32) || defined(_WIN64)
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SYSTEM_INFO sys_info;
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GetSystemInfo(&sys_info);
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return (c_size_t)sys_info.dwNumberOfProcessors > 0 ? (c_size_t)sys_info.dwNumberOfProcessors : 1;
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#elif defined(__linux__) || defined(__ANDROID__) || defined(__hpux) || defined(_AIX)
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long cores = sysconf(_SC_NPROCESSORS_ONLN);
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return (cores > 0) ? (c_size_t)cores : 1;
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#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
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int mib[2];
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mib[0] = CTL_HW;
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mib[1] = HW_NCPU; /* Fallback baseline key token selector */
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#ifdef HW_AVAILCPU
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mib[1] = HW_AVAILCPU; /* Preferred choice: online/available logical cores count query */
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#endif
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int num_cores = 0;
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size_t len = sizeof(num_cores);
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if (sysctl(mib, 2, &num_cores, &len, NULL, 0) == 0 && num_cores > 0) {
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return (c_size_t)num_cores;
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}
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return 1;
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#else
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/* Safe fallback anchor primitive for completely unknown or specialized bare-metal setups */
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return 1;
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#endif
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}
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