19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// Shared file mapping class. 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#define LOG_TAG "filemap" 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <utils/FileMap.h> 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <utils/Log.h> 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <stdio.h> 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <stdlib.h> 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef HAVE_POSIX_FILEMAP 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <sys/mman.h> 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <string.h> 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <memory.h> 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <errno.h> 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <assert.h> 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectusing namespace android; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/*static*/ long FileMap::mPageSize = -1; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor. Create an empty object. 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectFileMap::FileMap(void) 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : mRefCount(1), mFileName(NULL), mBasePtr(NULL), mBaseLength(0), 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataPtr(NULL), mDataLength(0) 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Destructor. 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectFileMap::~FileMap(void) 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assert(mRefCount == 0); 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //printf("+++ removing FileMap %p %u\n", mDataPtr, mDataLength); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRefCount = -100; // help catch double-free 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFileName != NULL) { 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project free(mFileName); 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef HAVE_POSIX_FILEMAP 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (munmap(mBasePtr, mBaseLength) != 0) { 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGD("munmap(%p, %d) failed\n", mBasePtr, (int) mBaseLength); 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef HAVE_WIN32_FILEMAP 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ( UnmapViewOfFile(mBasePtr) == 0) { 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGD("UnmapViewOfFile(%p) failed, error = %ld\n", mBasePtr, 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project GetLastError() ); 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CloseHandle(mFileMapping); 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CloseHandle(mFileHandle); 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Create a new mapping on an open file. 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Closing the file descriptor does not unmap the pages, so we don't 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * claim ownership of the fd. 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns "false" on failure. 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectbool FileMap::create(const char* origFileName, int fd, off_t offset, size_t length, bool readOnly) 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef HAVE_WIN32_FILEMAP 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int adjust; 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project off_t adjOffset; 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size_t adjLength; 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mPageSize == -1) { 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SYSTEM_INFO si; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project GetSystemInfo( &si ); 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPageSize = si.dwAllocationGranularity; 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DWORD protect = readOnly ? PAGE_READONLY : PAGE_READWRITE; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFileHandle = (HANDLE) _get_osfhandle(fd); 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFileMapping = CreateFileMapping( mFileHandle, NULL, protect, 0, 0, NULL); 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFileMapping == NULL) { 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGE("CreateFileMapping(%p, %lx) failed with error %ld\n", 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFileHandle, protect, GetLastError() ); 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjust = offset % mPageSize; 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjOffset = offset - adjust; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjLength = length + adjust; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBasePtr = MapViewOfFile( mFileMapping, 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project readOnly ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS, 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 0, 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (DWORD)(adjOffset), 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjLength ); 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mBasePtr == NULL) { 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGE("MapViewOfFile(%ld, %ld) failed with error %ld\n", 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjOffset, adjLength, GetLastError() ); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CloseHandle(mFileMapping); 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFileMapping = INVALID_HANDLE_VALUE; 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef HAVE_POSIX_FILEMAP 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int prot, flags, adjust; 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project off_t adjOffset; 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size_t adjLength; 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void* ptr; 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assert(mRefCount == 1); 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assert(fd >= 0); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assert(offset >= 0); 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assert(length > 0); 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* init on first use */ 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mPageSize == -1) { 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#if NOT_USING_KLIBC 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPageSize = sysconf(_SC_PAGESIZE); 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mPageSize == -1) { 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGE("could not get _SC_PAGESIZE\n"); 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#else 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* this holds for Linux, Darwin, Cygwin, and doesn't pain the ARM */ 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPageSize = 4096; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjust = offset % mPageSize; 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projecttry_again: 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjOffset = offset - adjust; 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjLength = length + adjust; 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project flags = MAP_SHARED; 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prot = PROT_READ; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!readOnly) 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prot |= PROT_WRITE; 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ptr = mmap(NULL, adjLength, prot, flags, fd, adjOffset); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ptr == MAP_FAILED) { 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Cygwin does not seem to like file mapping files from an offset. 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // So if we fail, try again with offset zero 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adjOffset > 0) { 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjust = offset; 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project goto try_again; 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGE("mmap(%ld,%ld) failed: %s\n", 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (long) adjOffset, (long) adjLength, strerror(errno)); 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBasePtr = ptr; 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif /* HAVE_POSIX_FILEMAP */ 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFileName = origFileName != NULL ? strdup(origFileName) : NULL; 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBaseLength = adjLength; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataOffset = offset; 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataPtr = (char*) mBasePtr + adjust; 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataLength = length; 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assert(mBasePtr != NULL); 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGV("MAP: base %p/%d data %p/%d\n", 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBasePtr, (int) mBaseLength, mDataPtr, (int) mDataLength); 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Provide guidance to the system. 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectint FileMap::advise(MapAdvice advice) 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#if HAVE_MADVISE 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int cc, sysAdvice; 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (advice) { 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case NORMAL: sysAdvice = MADV_NORMAL; break; 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case RANDOM: sysAdvice = MADV_RANDOM; break; 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case SEQUENTIAL: sysAdvice = MADV_SEQUENTIAL; break; 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case WILLNEED: sysAdvice = MADV_WILLNEED; break; 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case DONTNEED: sysAdvice = MADV_DONTNEED; break; 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assert(false); 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return -1; 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cc = madvise(mBasePtr, mBaseLength, sysAdvice); 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (cc != 0) 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGW("madvise(%d) failed: %s\n", sysAdvice, strerror(errno)); 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return cc; 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#else 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return -1; 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif // HAVE_MADVISE 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 223