/* * Copyright (C) 2010 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. */ #include <stdint.h> #include <sys/types.h> #include <unistd.h> #include <fcntl.h> #include <utils/Errors.h> #include <binder/Parcel.h> #include <gui/SensorChannel.h> namespace android { // ---------------------------------------------------------------------------- SensorChannel::SensorChannel() : mSendFd(-1), mReceiveFd(-1) { int fds[2]; if (pipe(fds) == 0) { mReceiveFd = fds[0]; mSendFd = fds[1]; fcntl(mReceiveFd, F_SETFL, O_NONBLOCK); fcntl(mSendFd, F_SETFL, O_NONBLOCK); } } SensorChannel::SensorChannel(const Parcel& data) : mSendFd(-1), mReceiveFd(-1) { mReceiveFd = dup(data.readFileDescriptor()); fcntl(mReceiveFd, F_SETFL, O_NONBLOCK); } SensorChannel::~SensorChannel() { if (mSendFd >= 0) close(mSendFd); if (mReceiveFd >= 0) close(mReceiveFd); } int SensorChannel::getFd() const { return mReceiveFd; } ssize_t SensorChannel::write(void const* vaddr, size_t size) { ssize_t len = ::write(mSendFd, vaddr, size); if (len < 0) return -errno; return len; } ssize_t SensorChannel::read(void* vaddr, size_t size) { ssize_t len = ::read(mReceiveFd, vaddr, size); if (len < 0) return -errno; return len; } status_t SensorChannel::writeToParcel(Parcel* reply) const { if (mReceiveFd < 0) return -EINVAL; status_t result = reply->writeDupFileDescriptor(mReceiveFd); close(mReceiveFd); mReceiveFd = -1; return result; } // ---------------------------------------------------------------------------- }; // namespace android