fb25e53b4f
Strip out Sort Transform from Libbsc copy. Reduce Libbsc memory use. Avoid redundant adler32 of data block in Libbsc.
135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
/*-----------------------------------------------------------*/
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/* Block Sorting, Lossless Data Compression Library. */
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/* Platform specific functions and constants */
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/*-----------------------------------------------------------*/
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/*--
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This file is a part of bsc and/or libbsc, a program and a library for
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lossless, block-sorting data compression.
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Copyright (c) 2009-2012 Ilya Grebnov <ilya.grebnov@gmail.com>
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See file AUTHORS for a full list of contributors.
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The bsc and libbsc is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The bsc and libbsc is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the bsc and libbsc. If not, see http://www.gnu.org/licenses/.
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Please see the files COPYING and COPYING.LIB for full copyright information.
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See also the bsc and libbsc web site:
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http://libbsc.com/ for more information.
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--*/
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#include <stdlib.h>
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#include <string.h>
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#include <memory.h>
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#include "platform.h"
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#include "../libbsc.h"
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#if defined(_WIN32)
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#include <windows.h>
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SIZE_T g_LargePageSize = 0;
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#endif
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int bsc_platform_init(int features)
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{
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#if defined(_WIN32)
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if (features & LIBBSC_FEATURE_LARGEPAGES)
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{
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HANDLE hToken = 0;
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if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &hToken))
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{
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LUID luid;
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if (LookupPrivilegeValue(NULL, TEXT("SeLockMemoryPrivilege"), &luid))
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{
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TOKEN_PRIVILEGES tp;
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tp.PrivilegeCount = 1;
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tp.Privileges[0].Luid = luid;
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tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
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AdjustTokenPrivileges(hToken, FALSE, &tp, sizeof(tp), 0, 0);
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}
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CloseHandle(hToken);
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}
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{
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if (HMODULE hKernel = GetModuleHandle(TEXT("kernel32.dll")))
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{
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typedef SIZE_T (WINAPI * GetLargePageMinimumProcT)();
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GetLargePageMinimumProcT largePageMinimumProc = (GetLargePageMinimumProcT)GetProcAddress(hKernel, "GetLargePageMinimum");
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if (largePageMinimumProc != NULL)
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{
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SIZE_T largePageSize = largePageMinimumProc();
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if ((largePageSize & (largePageSize - 1)) != 0) largePageSize = 0;
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g_LargePageSize = largePageSize;
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}
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}
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}
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}
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#endif
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return LIBBSC_NO_ERROR;
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}
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void * bsc_malloc(size_t size)
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{
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#if defined(_WIN32)
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if ((g_LargePageSize != 0) && (size >= 256 * 1024))
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{
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void * address = VirtualAlloc(0, (size + g_LargePageSize - 1) & (~(g_LargePageSize - 1)), MEM_COMMIT | MEM_LARGE_PAGES, PAGE_READWRITE);
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if (address != NULL) return address;
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}
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return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
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#else
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return malloc(size);
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#endif
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}
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void * bsc_zero_malloc(size_t size)
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{
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#if defined(_WIN32)
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if ((g_LargePageSize != 0) && (size >= 256 * 1024))
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{
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void * address = VirtualAlloc(0, (size + g_LargePageSize - 1) & (~(g_LargePageSize - 1)), MEM_COMMIT | MEM_LARGE_PAGES, PAGE_READWRITE);
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if (address != NULL) return address;
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}
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return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
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#else
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return calloc(1, size);
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#endif
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}
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void bsc_free(void * address)
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{
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#if defined(_WIN32)
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VirtualFree(address, 0, MEM_RELEASE);
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#else
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free(address);
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#endif
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}
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/*-----------------------------------------------------------*/
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/* End platform.cpp */
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/*-----------------------------------------------------------*/
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