SharedMemoryParcelable.h revision 478d5df3a0e1693669f5809176d5c7f6e8c9aa88
1828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk/* 2828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * Copyright 2016 The Android Open Source Project 3828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * 4828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * Licensed under the Apache License, Version 2.0 (the "License"); 5828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * you may not use this file except in compliance with the License. 6828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * You may obtain a copy of the License at 7828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * 8828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * http://www.apache.org/licenses/LICENSE-2.0 9828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * 10828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * Unless required by applicable law or agreed to in writing, software 11828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * distributed under the License is distributed on an "AS IS" BASIS, 12828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * See the License for the specific language governing permissions and 14828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * limitations under the License. 15828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk */ 16828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 17828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#ifndef BINDING_SHAREDMEMORYPARCELABLE_H 18828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#define BINDING_SHAREDMEMORYPARCELABLE_H 19828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 20828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#include <stdint.h> 21828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 22828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#include <sys/mman.h> 23828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#include <binder/Parcel.h> 24828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#include <binder/Parcelable.h> 25828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 26828bea5f61f3c40d24759cd8739dd95570883b56Phil Burkusing android::status_t; 27828bea5f61f3c40d24759cd8739dd95570883b56Phil Burkusing android::Parcel; 28828bea5f61f3c40d24759cd8739dd95570883b56Phil Burkusing android::Parcelable; 29828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 305ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burknamespace aaudio { 31828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 32828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk// Arbitrary limits for sanity checks. TODO remove after debugging. 33828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#define MAX_SHARED_MEMORIES (32) 343df348fbaca567ca891503213ff8c344a1ea2e05Phil Burk#define MAX_MMAP_OFFSET_BYTES (32 * 1024 * 8) 353df348fbaca567ca891503213ff8c344a1ea2e05Phil Burk#define MAX_MMAP_SIZE_BYTES (32 * 1024 * 8) 36828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 37828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk/** 38828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * This is a parcelable description of a shared memory referenced by a file descriptor. 39828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk * It may be divided into several regions. 40828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk */ 41828bea5f61f3c40d24759cd8739dd95570883b56Phil Burkclass SharedMemoryParcelable : public Parcelable { 42828bea5f61f3c40d24759cd8739dd95570883b56Phil Burkpublic: 43828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk SharedMemoryParcelable(); 44828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk virtual ~SharedMemoryParcelable(); 45828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 46828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk void setup(int fd, int32_t sizeInBytes); 47828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 48828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk virtual status_t writeToParcel(Parcel* parcel) const override; 49828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 50828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk virtual status_t readFromParcel(const Parcel* parcel) override; 51828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 52c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk // mmap() shared memory 535ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk aaudio_result_t resolve(int32_t offsetInBytes, int32_t sizeInBytes, void **regionAddressPtr); 54828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 55c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk // munmap() any mapped memory 56c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk aaudio_result_t close(); 57c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk 58c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk bool isFileDescriptorSafe(); 59c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk 60828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk int32_t getSizeInBytes(); 61828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 625ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk aaudio_result_t validate(); 63828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 64828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk void dump(); 65828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 66828bea5f61f3c40d24759cd8739dd95570883b56Phil Burkprotected: 67478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk 68478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk#define MMAP_UNRESOLVED_ADDRESS reinterpret_cast<uint8_t*>(MAP_FAILED) 69478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk 70828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk int mFd = -1; 71828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk int32_t mSizeInBytes = 0; 72478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk uint8_t *mResolvedAddress = MMAP_UNRESOLVED_ADDRESS; 73828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk}; 74828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 755ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk} /* namespace aaudio */ 76828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk 77828bea5f61f3c40d24759cd8739dd95570883b56Phil Burk#endif //BINDING_SHAREDMEMORYPARCELABLE_H 78