MemoryHeapBase.cpp revision d4851d74ac9c737acda85f1fdbc028c68f481a36
1edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 2edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 3edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 4edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * you may not use this file except in compliance with the License. 6edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * You may obtain a copy of the License at 7edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 8edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 10edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * See the License for the specific language governing permissions and 14edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * limitations under the License. 15edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 16edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 17edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define LOG_TAG "MemoryHeapBase" 18edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 19edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdlib.h> 20edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdint.h> 21edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <unistd.h> 22edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <fcntl.h> 23edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <errno.h> 24edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/types.h> 25edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/stat.h> 26edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/ioctl.h> 27edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 28edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <cutils/log.h> 29edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <cutils/ashmem.h> 30edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <cutils/atomic.h> 31edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 32c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/MemoryHeapBase.h> 33edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 34edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if HAVE_ANDROID_OS 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <linux/android_pmem.h> 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 37edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 38edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 39edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 40edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 41edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// --------------------------------------------------------------------------- 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 43edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase() 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice(NULL), mNeedUnmap(false) 46edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase(size_t size, uint32_t flags, char const * name) 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice(0), mNeedUnmap(false) 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t pagesize = getpagesize(); 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = ashmem_create_region(name == NULL ? "MemoryHeapBase" : name, size); 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE_IF(fd<0, "error creating ashmem region: %s", strerror(errno)); 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mapfd(fd, size) == NO_ERROR) { 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (flags & READ_ONLY) { 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ashmem_set_prot_region(fd, PROT_READ); 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 63edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 64edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 65edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 66edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase(const char* device, size_t size, uint32_t flags) 67edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 68edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice(0), mNeedUnmap(false) 69edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 70edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = open(device, O_RDWR); 71edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE_IF(fd<0, "error opening %s: %s", device, strerror(errno)); 72edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 73edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t pagesize = getpagesize(); 74edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 75edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mapfd(fd, size) == NO_ERROR) { 76edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice = device; 77edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 78edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 79edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 80edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 81d4851d74ac9c737acda85f1fdbc028c68f481a36Benny WongMemoryHeapBase::MemoryHeapBase(int fd, size_t size, uint32_t flags, uint32_t offset) 82edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 83edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice(0), mNeedUnmap(false) 84edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 85edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t pagesize = getpagesize(); 86edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 87d4851d74ac9c737acda85f1fdbc028c68f481a36Benny Wong mapfd(dup(fd), size, offset); 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t MemoryHeapBase::init(int fd, void *base, int size, int flags, const char* device) 91edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 92edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mFD != -1) { 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return INVALID_OPERATION; 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mFD = fd; 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = base; 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mSize = size; 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mFlags = flags; 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice = device; 100edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 101edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 102edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 103d4851d74ac9c737acda85f1fdbc028c68f481a36Benny Wongstatus_t MemoryHeapBase::mapfd(int fd, size_t size, uint32_t offset) 104edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 105edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (size == 0) { 106edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // try to figure out the size automatically 107edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if HAVE_ANDROID_OS 108edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // first try the PMEM ioctl 109edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pmem_region reg; 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int err = ioctl(fd, PMEM_GET_TOTAL_SIZE, ®); 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (err == 0) 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = reg.len; 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (size == 0) { // try fstat 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project struct stat sb; 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fstat(fd, &sb) == 0) 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = sb.st_size; 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // if it didn't work, let mmap() fail. 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if ((mFlags & DONT_MAP_LOCALLY) == 0) { 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* base = (uint8_t*)mmap(0, size, 124d4851d74ac9c737acda85f1fdbc028c68f481a36Benny Wong PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset); 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (base == MAP_FAILED) { 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("mmap(fd=%d, size=%u) failed (%s)", 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd, uint32_t(size), strerror(errno)); 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return -errno; 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //LOGD("mmap(fd=%d, base=%p, size=%lu)", fd, base, size); 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = base; 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mNeedUnmap = true; 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = 0; // not MAP_FAILED 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mNeedUnmap = false; 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mFD = fd; 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mSize = size; 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMemoryHeapBase::~MemoryHeapBase() 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dispose(); 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid MemoryHeapBase::dispose() 149edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 150edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = android_atomic_or(-1, &mFD); 151edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 152edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mNeedUnmap) { 153edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //LOGD("munmap(fd=%d, base=%p, size=%lu)", fd, mBase, mSize); 154edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project munmap(mBase, mSize); 155edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 156edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = 0; 157edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mSize = 0; 158edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 159edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 162edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint MemoryHeapBase::getHeapID() const { 163edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mFD; 164edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid* MemoryHeapBase::getBase() const { 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mBase; 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsize_t MemoryHeapBase::getSize() const { 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mSize; 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 174edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectuint32_t MemoryHeapBase::getFlags() const { 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mFlags; 176edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectconst char* MemoryHeapBase::getDevice() const { 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mDevice; 180edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 181edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 182edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// --------------------------------------------------------------------------- 183edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 184