forked from bartvdbraak/blender
89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
/*
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* Copyright 2011-2016 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "util_windows.h"
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#ifdef _WIN32
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CCL_NAMESPACE_BEGIN
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#ifdef _M_X64
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# include <VersionHelpers.h>
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#endif
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#if _WIN32_WINNT < 0x0601
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tGetActiveProcessorGroupCount *GetActiveProcessorGroupCount;
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tGetActiveProcessorCount *GetActiveProcessorCount;
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tSetThreadGroupAffinity *SetThreadGroupAffinity;
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#endif
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static WORD GetActiveProcessorGroupCount_stub()
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{
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return 1;
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}
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static DWORD GetActiveProcessorCount_stub(WORD /*GroupNumber*/)
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{
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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return info.dwNumberOfProcessors;
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}
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static BOOL SetThreadGroupAffinity_stub(
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HANDLE /*hThread*/,
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const GROUP_AFFINITY * /*GroupAffinity*/,
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PGROUP_AFFINITY /*PreviousGroupAffinity*/)
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{
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return TRUE;
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}
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static bool supports_numa()
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{
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#ifndef _M_X64
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return false;
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#else
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return IsWindows7OrGreater();
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#endif
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}
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void util_windows_init_numa_groups()
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{
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static bool initialized = false;
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if(initialized) {
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return;
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}
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initialized = true;
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#if _WIN32_WINNT < 0x0601
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if(!supports_numa()) {
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/* Use stubs on platforms which doesn't have rean NUMA/Groups. */
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GetActiveProcessorGroupCount = GetActiveProcessorGroupCount_stub;
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GetActiveProcessorCount = GetActiveProcessorCount_stub;
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SetThreadGroupAffinity = SetThreadGroupAffinity_stub;
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return;
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}
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HMODULE kernel = GetModuleHandleA("kernel32.dll");
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# define READ_SYMBOL(sym) sym = (t##sym*)GetProcAddress(kernel, #sym)
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READ_SYMBOL(GetActiveProcessorGroupCount);
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READ_SYMBOL(GetActiveProcessorCount);
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READ_SYMBOL(SetThreadGroupAffinity);
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# undef READ_SUMBOL
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#endif
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}
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CCL_NAMESPACE_END
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#endif /* _WIN32 */
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