60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright © 2015-2016 Franklin "Snaipe" Mathieu <http://snai.pe/>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "internal.h"
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size_t get_processor_count(void)
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{
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#ifdef _WIN32
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/* This code shall return 1 until
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https://github.com/Snaipe/Criterion/issues/118 gets fixed. */
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# if 0
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SYSTEM_INFO sysinfo;
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GetSystemInfo(&sysinfo);
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return (size_t) sysinfo.dwNumberOfProcessors;
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# else
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return 1;
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# endif
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#elif defined (BSD)
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int mib[2] = { CTL_HW, HW_NCPU };
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# ifdef __APPLE__
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size_t miblen = 2;
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sysctlnametomib("hw.logicalcpu", mib, &miblen);
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# endif
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long long count = 0;
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size_t len = sizeof (count);
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int res = sysctl(mib, 2, &count, &len, NULL, 0);
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if (count < 1 || res == -1)
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count = 1;
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return (size_t) count;
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#elif defined (__linux__)
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return sysconf(_SC_NPROCESSORS_ONLN);
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#else
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# error System not supported
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#endif
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}
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