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/*
* Copyright (C) 2011 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.
*/
#define LOG_TAG "LibAAH_RTP"
#include <utils/Log.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <unistd.h>
#include "pipe_event.h"
namespace android {
PipeEvent::PipeEvent() {
pipe_[0] = -1;
pipe_[1] = -1;
// Create the pipe.
if (pipe(pipe_) >= 0) {
// Set non-blocking mode on the read side of the pipe so we can
// easily drain it whenever we wakeup.
fcntl(pipe_[0], F_SETFL, O_NONBLOCK);
} else {
ALOGE("Failed to create pipe event %d %d %d",
pipe_[0], pipe_[1], errno);
pipe_[0] = -1;
pipe_[1] = -1;
}
}
PipeEvent::~PipeEvent() {
if (pipe_[0] >= 0) {
close(pipe_[0]);
}
if (pipe_[1] >= 0) {
close(pipe_[1]);
}
}
void PipeEvent::clearPendingEvents() {
char drain_buffer[16];
while (read(pipe_[0], drain_buffer, sizeof(drain_buffer)) > 0) {
// No body.
}
}
bool PipeEvent::wait(int timeout) {
struct pollfd wait_fd;
wait_fd.fd = getWakeupHandle();
wait_fd.events = POLLIN;
wait_fd.revents = 0;
int res = poll(&wait_fd, 1, timeout);
if (res < 0) {
ALOGE("Wait error in PipeEvent; sleeping to prevent overload!");
usleep(1000);
}
return (res > 0);
}
void PipeEvent::setEvent() {
char foo = 'q';
write(pipe_[1], &foo, 1);
}
} // namespace android
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