| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * Implementation of the user-space ashmem API for devices, which have our |
| * ashmem-enabled kernel. See ashmem-sim.c for the "fake" tmp-based version, |
| * used by the simulator. |
| */ |
| |
| #include "IPCListener.h" |
| #include "Buffering/IPCBuffer.h" |
| #include "IPCArguments.h" |
| #include "IPCCommunicator.h" |
| #include "IPCException.h" |
| #include "IPCHandler.h" |
| #include "IPCResult.h" |
| #include "IPCType.h" |
| #include <unistd.h> |
| |
| namespace { |
| class IPCListenerImpl : public IPCCommunicator, |
| public IPCListener { |
| public: |
| IPCListenerImpl(IPCFutexPageQueue* futexPageQueue, IPCHandler* handler); |
| ~IPCListenerImpl() override; |
| void listen() override; |
| |
| private: |
| int m_fd; |
| IPCHandler* m_handler; |
| }; |
| |
| IPCListenerImpl::IPCListenerImpl(IPCFutexPageQueue* futexPageQueue, IPCHandler* handler) |
| : IPCCommunicator(futexPageQueue) |
| , m_handler(handler) |
| { |
| } |
| |
| IPCListenerImpl::~IPCListenerImpl() |
| { |
| } |
| |
| void IPCListenerImpl::listen() |
| { |
| while (true) { |
| uint32_t msg = doReadPackage(); |
| bool isAsync = !!(msg & MSG_FLAG_ASYNC); |
| msg &= MSG_MASK; |
| if (msg == MSG_END) |
| throw IPCException("unexpected MSG_END"); |
| else if (msg == MSG_TERMINATE) { |
| releaseBlob(); |
| throw IPCException("peer terminates"); |
| } |
| std::unique_ptr<IPCArguments> arguments = assembleArguments(); |
| releaseBlob(); |
| std::unique_ptr<IPCResult> sendBack = m_handler->handle(msg, arguments.get()); |
| if (!isAsync) { |
| std::unique_ptr<IPCBuffer> resultBuffer = generateResultBuffer(sendBack.get()); |
| doSendBufferOnly(resultBuffer.get()); |
| } |
| } |
| } |
| } |
| |
| std::unique_ptr<IPCListener> createIPCListener(IPCFutexPageQueue* futexPageQueue, IPCHandler* handler) |
| { |
| return std::unique_ptr<IPCListener>(new IPCListenerImpl(futexPageQueue, handler)); |
| } |