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 Projectnamespace android { 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// --------------------------------------------------------------------------- 37edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 385728a92e29c1c9729017a82c5d0bc18fc1069923Anu SundararajanMemoryHeapBase::MemoryHeapBase() 39edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), 405728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan mDevice(NULL), mNeedUnmap(false), mOffset(0) 41edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 43edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase(size_t size, uint32_t flags, char const * name) 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 465728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan mDevice(0), mNeedUnmap(false), mOffset(0) 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t pagesize = getpagesize(); 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = ashmem_create_region(name == NULL ? "MemoryHeapBase" : name, size); 51e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE_IF(fd<0, "error creating ashmem region: %s", strerror(errno)); 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mapfd(fd, size) == NO_ERROR) { 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (flags & READ_ONLY) { 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ashmem_set_prot_region(fd, PROT_READ); 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase(const char* device, size_t size, uint32_t flags) 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 635728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan mDevice(0), mNeedUnmap(false), mOffset(0) 64edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 650db1a8931bb24b4f240c19210e70844af8c1e9ffIliyan Malchev int open_flags = O_RDWR; 660db1a8931bb24b4f240c19210e70844af8c1e9ffIliyan Malchev if (flags & NO_CACHING) 670db1a8931bb24b4f240c19210e70844af8c1e9ffIliyan Malchev open_flags |= O_SYNC; 680db1a8931bb24b4f240c19210e70844af8c1e9ffIliyan Malchev 690db1a8931bb24b4f240c19210e70844af8c1e9ffIliyan Malchev int fd = open(device, open_flags); 70e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE_IF(fd<0, "error opening %s: %s", device, strerror(errno)); 71edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 72edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t pagesize = getpagesize(); 73edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 74edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mapfd(fd, size) == NO_ERROR) { 75edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice = device; 76edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 77edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 78edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 79edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 80d4851d74ac9c737acda85f1fdbc028c68f481a36Benny WongMemoryHeapBase::MemoryHeapBase(int fd, size_t size, uint32_t flags, uint32_t offset) 81edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 825728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan mDevice(0), mNeedUnmap(false), mOffset(0) 83edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 84edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t pagesize = getpagesize(); 85edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 86d4851d74ac9c737acda85f1fdbc028c68f481a36Benny Wong mapfd(dup(fd), size, offset); 87edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t MemoryHeapBase::init(int fd, void *base, int size, int flags, const char* device) 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 91edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mFD != -1) { 92edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return INVALID_OPERATION; 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mFD = fd; 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = base; 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mSize = size; 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mFlags = flags; 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDevice = device; 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 100edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 101edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 102d4851d74ac9c737acda85f1fdbc028c68f481a36Benny Wongstatus_t MemoryHeapBase::mapfd(int fd, size_t size, uint32_t offset) 103edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 104edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (size == 0) { 105edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // try to figure out the size automatically 106a5a13a3ecf72554120ce5e856d514b72b70f5cf1Elliott Hughes struct stat sb; 107a5a13a3ecf72554120ce5e856d514b72b70f5cf1Elliott Hughes if (fstat(fd, &sb) == 0) 108a5a13a3ecf72554120ce5e856d514b72b70f5cf1Elliott Hughes size = sb.st_size; 109edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // if it didn't work, let mmap() fail. 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if ((mFlags & DONT_MAP_LOCALLY) == 0) { 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* base = (uint8_t*)mmap(0, size, 114d4851d74ac9c737acda85f1fdbc028c68f481a36Benny Wong PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset); 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (base == MAP_FAILED) { 116e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("mmap(fd=%d, size=%u) failed (%s)", 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd, uint32_t(size), strerror(errno)); 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return -errno; 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 1219d4536835248525f32f1504a3d28d5bbfa0a2910Steve Block //ALOGD("mmap(fd=%d, base=%p, size=%lu)", fd, base, size); 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = base; 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mNeedUnmap = true; 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = 0; // not MAP_FAILED 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mNeedUnmap = false; 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mFD = fd; 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mSize = size; 1305728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan mOffset = offset; 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMemoryHeapBase::~MemoryHeapBase() 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dispose(); 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid MemoryHeapBase::dispose() 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = android_atomic_or(-1, &mFD); 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mNeedUnmap) { 1449d4536835248525f32f1504a3d28d5bbfa0a2910Steve Block //ALOGD("munmap(fd=%d, base=%p, size=%lu)", fd, mBase, mSize); 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project munmap(mBase, mSize); 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBase = 0; 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mSize = 0; 149edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 150edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 151edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 152edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 153edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint MemoryHeapBase::getHeapID() const { 154edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mFD; 155edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 156edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 157edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid* MemoryHeapBase::getBase() const { 158edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mBase; 159edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsize_t MemoryHeapBase::getSize() const { 162edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mSize; 163edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 164edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectuint32_t MemoryHeapBase::getFlags() const { 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mFlags; 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectconst char* MemoryHeapBase::getDevice() const { 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mDevice; 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 1735728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajanuint32_t MemoryHeapBase::getOffset() const { 1745728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan return mOffset; 1755728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan} 1765728a92e29c1c9729017a82c5d0bc18fc1069923Anu Sundararajan 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// --------------------------------------------------------------------------- 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 179