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116 lines
3.3 KiB
116 lines
3.3 KiB
/* XMRig
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* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
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* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
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* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
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* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
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* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
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* Copyright 2016-2017 XMRig <support@xmrig.com>
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*
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MEMORY_H__
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#define __MEMORY_H__
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#include <windows.h>
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#include "options.h"
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#include "persistent_memory.h"
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char *persistent_memory;
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int persistent_memory_flags = 0;
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/*****************************************************************
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SetLockPagesPrivilege: a function to obtain or
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release the privilege of locking physical pages.
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Inputs:
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HANDLE hProcess: Handle for the process for which the
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privilege is needed
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BOOL bEnable: Enable (TRUE) or disable?
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Return value: TRUE indicates success, FALSE failure.
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*****************************************************************/
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/**
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* AWE Example: https://msdn.microsoft.com/en-us/library/windows/desktop/aa366531(v=vs.85).aspx
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* Creating a File Mapping Using Large Pages: https://msdn.microsoft.com/en-us/library/aa366543(VS.85).aspx
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*/
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static BOOL SetLockPagesPrivilege(HANDLE hProcess, BOOL bEnable) {
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struct {
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DWORD Count;
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LUID_AND_ATTRIBUTES Privilege[1];
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} Info;
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HANDLE Token;
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BOOL result;
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if (OpenProcessToken(hProcess, TOKEN_ADJUST_PRIVILEGES, &Token) != TRUE) {
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return FALSE;
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}
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Info.Count = 1;
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Info.Privilege[0].Attributes = bEnable ? SE_PRIVILEGE_ENABLED : 0;
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if (LookupPrivilegeValue(NULL, SE_LOCK_MEMORY_NAME, &(Info.Privilege[0].Luid)) != TRUE) {
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return FALSE;
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}
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if (AdjustTokenPrivileges(Token, FALSE, (PTOKEN_PRIVILEGES) &Info, 0, NULL, NULL) != TRUE) {
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return FALSE;
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}
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if (GetLastError() != ERROR_SUCCESS) {
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return FALSE;
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}
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CloseHandle(Token);
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return TRUE;
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}
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const char * persistent_memory_allocate() {
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const int size = TWO_MB_PAGE * (opt_n_threads + 1);
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if (SetLockPagesPrivilege(GetCurrentProcess(), TRUE)) {
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persistent_memory_flags |= MEMORY_HUGEPAGES_AVAILABLE;
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}
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persistent_memory = VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE | MEM_LARGE_PAGES, PAGE_READWRITE);
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if (!persistent_memory) {
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persistent_memory = _mm_malloc(size, 4096);
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}
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else {
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persistent_memory_flags |= MEMORY_HUGEPAGES_ENABLED;
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}
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return persistent_memory;
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}
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void persistent_memory_free() {
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if (persistent_memory_flags & MEMORY_HUGEPAGES_ENABLED) {
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VirtualFree(persistent_memory, 0, MEM_RELEASE);
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}
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else {
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_mm_free(persistent_memory);
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}
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}
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#endif /* __MEMORY_H__ */
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