| 1 | /* $Id$ */
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| 2 | /** @file
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| 3 | * win_get_processor_group_active_mask - Helper.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2020 knut st. osmundsen <[email protected]>
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 10 | * copy of this software and associated documentation files (the "Software"),
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| 11 | * to deal in the Software without restriction, including without limitation
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the
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| 14 | * Software is furnished to do so, subject to the following conditions:
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| 15 | *
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| 16 | * The above copyright notice and this permission notice shall be included
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| 17 | * in all copies or substantial portions of the Software.
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| 18 | *
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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| 22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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| 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 24 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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| 25 | * IN THE SOFTWARE.
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| 26 | *
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| 27 | * Alternatively, the content of this file may be used under the terms of the
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| 28 | * GPL version 2 or later, or LGPL version 2.1 or later.
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| 29 | */
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| 30 |
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| 31 | /*********************************************************************************************************************************
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| 32 | * Header Files *
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| 33 | *********************************************************************************************************************************/
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| 34 | #include <string.h>
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| 35 | #include <Windows.h>
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| 36 | #include "win_get_processor_group_active_mask.h"
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| 37 |
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| 38 |
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| 39 | KAFFINITY win_get_processor_group_active_mask(unsigned iGroup)
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| 40 | {
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| 41 | union
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| 42 | {
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| 43 | SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX Info;
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| 44 | SYSTEM_INFO SysInfo;
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| 45 | char ab[8192];
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| 46 | } uBuf;
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| 47 | typedef BOOL (WINAPI *PFNGETLOGICALPROCESSORINFORMATIONEX)(LOGICAL_PROCESSOR_RELATIONSHIP,
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| 48 | SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX *, DWORD *);
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| 49 | static PFNGETLOGICALPROCESSORINFORMATIONEX volatile s_pfnGetLogicalProcessorInformationEx = NULL;
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| 50 | static HMODULE volatile s_hmodKernel32 = NULL;
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| 51 | PFNGETLOGICALPROCESSORINFORMATIONEX pfnGetLogicalProcessorInformationEx = s_pfnGetLogicalProcessorInformationEx;
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| 52 | if (!pfnGetLogicalProcessorInformationEx)
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| 53 | {
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| 54 | if (!s_hmodKernel32)
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| 55 | {
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| 56 | HMODULE hmodKernel32 = GetModuleHandleW(L"KERNEL32.DLL");
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| 57 | s_hmodKernel32 = hmodKernel32;
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| 58 | s_pfnGetLogicalProcessorInformationEx
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| 59 | = pfnGetLogicalProcessorInformationEx
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| 60 | = (PFNGETLOGICALPROCESSORINFORMATIONEX)GetProcAddress(hmodKernel32, "GetLogicalProcessorInformationEx");
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | SetLastError(0);
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| 65 | if (pfnGetLogicalProcessorInformationEx)
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| 66 | {
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| 67 | DWORD cbBuf;
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| 68 | memset(&uBuf, 0, sizeof(uBuf));
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| 69 | uBuf.Info.Size = cbBuf = sizeof(uBuf);
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| 70 | if (pfnGetLogicalProcessorInformationEx(RelationGroup, &uBuf.Info, &cbBuf))
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| 71 | {
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| 72 | SetLastError(0);
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| 73 | if (iGroup < uBuf.Info.Group.MaximumGroupCount)
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| 74 | return uBuf.Info.Group.GroupInfo[iGroup].ActiveProcessorMask;
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| 75 | }
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| 76 | }
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| 77 | else if (iGroup == 0)
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| 78 | {
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| 79 | GetSystemInfo(&uBuf.SysInfo);
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| 80 | return uBuf.SysInfo.dwActiveProcessorMask;
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| 81 | }
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| 82 | return 0;
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| 83 | }
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| 84 |
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