mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
/*
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* Copyright (C) 2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "CPU.h"
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#if (CPU(X86) || CPU(X86_64)) && OS(DARWIN)
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#include <mutex>
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#include <sys/sysctl.h>
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#endif
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namespace JSC {
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#if (CPU(X86) || CPU(X86_64)) && OS(DARWIN)
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bool isKernTCSMAvailable()
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{
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if (!Options::useKernTCSM())
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return false;
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uint32_t val = 0;
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size_t valSize = sizeof(val);
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int rc = sysctlbyname("kern.tcsm_available", &val, &valSize, nullptr, 0);
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if (rc < 0)
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return false;
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return !!val;
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}
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bool enableKernTCSM()
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{
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uint32_t val = 1;
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int rc = sysctlbyname("kern.tcsm_enable", nullptr, nullptr, &val, sizeof(val));
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if (rc < 0)
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return false;
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return true;
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}
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int kernTCSMAwareNumberOfProcessorCores()
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{
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static std::once_flag onceFlag;
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static int result;
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std::call_once(onceFlag, [] {
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result = WTF::numberOfProcessorCores();
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if (result <= 1)
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return;
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if (isKernTCSMAvailable())
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--result;
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});
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return result;
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}
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int64_t hwL3CacheSize()
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{
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int64_t val = 0;
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size_t valSize = sizeof(val);
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int rc = sysctlbyname("hw.l3cachesize", &val, &valSize, nullptr, 0);
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if (rc < 0)
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return 0;
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return val;
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}
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int32_t hwPhysicalCPUMax()
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{
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int32_t val = 0;
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size_t valSize = sizeof(val);
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int rc = sysctlbyname("hw.physicalcpu_max", &val, &valSize, nullptr, 0);
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if (rc < 0)
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return 0;
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return val;
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}
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#endif // #if (CPU(X86) || CPU(X86_64)) && OS(DARWIN)
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} // namespace JSC
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