diff options
Diffstat (limited to 'src/lib/win_get_processor_group_active_mask.c')
| -rw-r--r-- | src/lib/win_get_processor_group_active_mask.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/lib/win_get_processor_group_active_mask.c b/src/lib/win_get_processor_group_active_mask.c new file mode 100644 index 0000000..23a7d0f --- /dev/null +++ b/src/lib/win_get_processor_group_active_mask.c @@ -0,0 +1,84 @@ +/* $Id: win_get_processor_group_active_mask.c 3356 2020-06-05 02:09:14Z bird $ */ +/** @file + * win_get_processor_group_active_mask - Helper. + */ + +/* + * Copyright (c) 2020 knut st. osmundsen <bird-kBuild-spamxx@anduin.net> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Alternatively, the content of this file may be used under the terms of the + * GPL version 2 or later, or LGPL version 2.1 or later. + */ + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <string.h> +#include <Windows.h> +#include "win_get_processor_group_active_mask.h" + + +KAFFINITY win_get_processor_group_active_mask(unsigned iGroup) +{ + union + { + SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX Info; + SYSTEM_INFO SysInfo; + char ab[8192]; + } uBuf; + typedef BOOL (WINAPI *PFNGETLOGICALPROCESSORINFORMATIONEX)(LOGICAL_PROCESSOR_RELATIONSHIP, + SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX *, DWORD *); + static PFNGETLOGICALPROCESSORINFORMATIONEX volatile s_pfnGetLogicalProcessorInformationEx = NULL; + static HMODULE volatile s_hmodKernel32 = NULL; + PFNGETLOGICALPROCESSORINFORMATIONEX pfnGetLogicalProcessorInformationEx = s_pfnGetLogicalProcessorInformationEx; + if (!pfnGetLogicalProcessorInformationEx) + { + if (!s_hmodKernel32) + { + HMODULE hmodKernel32 = GetModuleHandleW(L"KERNEL32.DLL"); + s_hmodKernel32 = hmodKernel32; + s_pfnGetLogicalProcessorInformationEx + = pfnGetLogicalProcessorInformationEx + = (PFNGETLOGICALPROCESSORINFORMATIONEX)GetProcAddress(hmodKernel32, "GetLogicalProcessorInformationEx"); + } + } + + SetLastError(0); + if (pfnGetLogicalProcessorInformationEx) + { + DWORD cbBuf; + memset(&uBuf, 0, sizeof(uBuf)); + uBuf.Info.Size = cbBuf = sizeof(uBuf); + if (pfnGetLogicalProcessorInformationEx(RelationGroup, &uBuf.Info, &cbBuf)) + { + SetLastError(0); + if (iGroup < uBuf.Info.Group.MaximumGroupCount) + return uBuf.Info.Group.GroupInfo[iGroup].ActiveProcessorMask; + } + } + else if (iGroup == 0) + { + GetSystemInfo(&uBuf.SysInfo); + return uBuf.SysInfo.dwActiveProcessorMask; + } + return 0; +} + |