Add Mem class.

src/Mem_win.cpp

@@ -0,0 +1,171 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2016-2017 XMRig       <support@xmrig.com>
+ *
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <winsock2.h>
+#include <windows.h>
+#include <ntsecapi.h>
+#include <tchar.h>
+
+
+#include "Mem.h"
+#include "Console.h"
+#include "Options.h"
+
+
+/*****************************************************************
+SetLockPagesPrivilege: a function to obtain or
+release the privilege of locking physical pages.
+
+Inputs:
+
+HANDLE hProcess: Handle for the process for which the
+privilege is needed
+
+BOOL bEnable: Enable (TRUE) or disable?
+
+Return value: TRUE indicates success, FALSE failure.
+
+*****************************************************************/
+/**
+ * AWE Example: https://msdn.microsoft.com/en-us/library/windows/desktop/aa366531(v=vs.85).aspx
+ * Creating a File Mapping Using Large Pages: https://msdn.microsoft.com/en-us/library/aa366543(VS.85).aspx
+ */
+static BOOL SetLockPagesPrivilege() {
+    HANDLE token;
+
+    if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &token) != TRUE) {
+        return FALSE;
+    }
+
+    TOKEN_PRIVILEGES tp;
+    tp.PrivilegeCount = 1;
+    tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
+
+    if (LookupPrivilegeValue(NULL, SE_LOCK_MEMORY_NAME, &(tp.Privileges[0].Luid)) != TRUE) {
+        return FALSE;
+    }
+
+    BOOL rc = AdjustTokenPrivileges(token, FALSE, (PTOKEN_PRIVILEGES) &tp, 0, NULL, NULL);
+    if (rc != TRUE || GetLastError() != ERROR_SUCCESS) {
+        return FALSE;
+    }
+
+    CloseHandle(token);
+
+    return TRUE;
+}
+
+
+static LSA_UNICODE_STRING StringToLsaUnicodeString(LPCTSTR string) {
+    LSA_UNICODE_STRING lsaString;
+    DWORD dwLen = 0;
+
+    dwLen = wcslen(string);
+    lsaString.Buffer = (LPWSTR) string;
+    lsaString.Length = (USHORT)((dwLen) * sizeof(WCHAR));
+    lsaString.MaximumLength = (USHORT)((dwLen + 1) * sizeof(WCHAR));
+    return lsaString;
+}
+
+
+static BOOL ObtainLockPagesPrivilege() {
+    HANDLE token;
+    PTOKEN_USER user = NULL;
+
+    if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token) == TRUE) {
+        DWORD size = 0;
+
+        GetTokenInformation(token, TokenUser, NULL, 0, &size);
+        if (size) {
+            user = (PTOKEN_USER) LocalAlloc(LPTR, size);
+        }
+
+        GetTokenInformation(token, TokenUser, user, size, &size);
+        CloseHandle(token);
+    }
+
+    if (!user) {
+        return FALSE;
+    }
+
+    LSA_HANDLE handle;
+    LSA_OBJECT_ATTRIBUTES attributes;
+    ZeroMemory(&attributes, sizeof(attributes));
+
+    BOOL result = FALSE;
+    if (LsaOpenPolicy(NULL, &attributes, POLICY_ALL_ACCESS, &handle) == 0) {
+        LSA_UNICODE_STRING str = StringToLsaUnicodeString(_T(SE_LOCK_MEMORY_NAME));
+
+        if (LsaAddAccountRights(handle, user->User.Sid, &str, 1) == 0) {
+            LOG_DEBUG("Huge pages support was successfully enabled, but reboot required to use it");
+            result = TRUE;
+        }
+
+        LsaClose(handle);
+    }
+
+    LocalFree(user);
+    return result;
+}
+
+
+static BOOL TrySetLockPagesPrivilege() {
+    if (SetLockPagesPrivilege()) {
+        return TRUE;
+    }
+
+    return ObtainLockPagesPrivilege() && SetLockPagesPrivilege();
+}
+
+
+bool Mem::allocate(int algo, int threads, bool doubleHash)
+{
+    const int ratio = (doubleHash && algo != Options::ALGO_CRYPTONIGHT_LITE) ? 2 : 1;
+    const size_t size  = MEMORY * (threads * ratio + 1);
+
+    if (TrySetLockPagesPrivilege()) {
+        m_flags |= HUGEPAGES_AVAILABLE;
+    }
+
+    m_memory = static_cast<uint8_t*>(VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE | MEM_LARGE_PAGES, PAGE_READWRITE));
+    if (!m_memory) {
+        m_memory = static_cast<uint8_t*>(_mm_malloc(size, 16));
+    }
+    else {
+        m_flags |= HUGEPAGES_ENABLED;
+    }
+
+    return true;
+}
+
+
+void Mem::release()
+{
+    if (m_flags & HUGEPAGES_ENABLED) {
+        VirtualFree(m_memory, 0, MEM_RELEASE);
+    }
+    else {
+        _mm_free(m_memory);
+    }
+}