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/*
* Copyright (C) 2015 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 "hwc-drm-worker"
#include "worker.h"
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/resource.h>
#include <sys/signal.h>
#include <cutils/log.h>
namespace android {
Worker::Worker(const char *name, int priority)
: name_(name), priority_(priority), exit_(false), initialized_(false) {
}
Worker::~Worker() {
if (!initialized_)
return;
pthread_kill(thread_, SIGTERM);
pthread_cond_destroy(&cond_);
pthread_mutex_destroy(&lock_);
}
int Worker::InitWorker() {
int ret = pthread_cond_init(&cond_, NULL);
if (ret) {
ALOGE("Failed to int thread %s condition %d", name_.c_str(), ret);
return ret;
}
ret = pthread_mutex_init(&lock_, NULL);
if (ret) {
ALOGE("Failed to init thread %s lock %d", name_.c_str(), ret);
pthread_cond_destroy(&cond_);
return ret;
}
ret = pthread_create(&thread_, NULL, InternalRoutine, this);
if (ret) {
ALOGE("Could not create thread %s %d", name_.c_str(), ret);
pthread_mutex_destroy(&lock_);
pthread_cond_destroy(&cond_);
return ret;
}
initialized_ = true;
return 0;
}
bool Worker::initialized() const {
return initialized_;
}
int Worker::Lock() {
return pthread_mutex_lock(&lock_);
}
int Worker::Unlock() {
return pthread_mutex_unlock(&lock_);
}
int Worker::SignalLocked() {
return SignalThreadLocked(false);
}
int Worker::ExitLocked() {
int signal_ret = SignalThreadLocked(true);
if (signal_ret)
ALOGE("Failed to signal thread %s with exit %d", name_.c_str(), signal_ret);
int join_ret = pthread_join(thread_, NULL);
if (join_ret && join_ret != ESRCH)
ALOGE("Failed to join thread %s in exit %d", name_.c_str(), join_ret);
return signal_ret | join_ret;
}
int Worker::Signal() {
int ret = Lock();
if (ret) {
ALOGE("Failed to acquire lock in Signal() %d\n", ret);
return ret;
}
int signal_ret = SignalLocked();
ret = Unlock();
if (ret) {
ALOGE("Failed to release lock in Signal() %d\n", ret);
return ret;
}
return signal_ret;
}
int Worker::Exit() {
int ret = Lock();
if (ret) {
ALOGE("Failed to acquire lock in Exit() %d\n", ret);
return ret;
}
int exit_ret = ExitLocked();
ret = Unlock();
if (ret) {
ALOGE("Failed to release lock in Exit() %d\n", ret);
return ret;
}
return exit_ret;
}
int Worker::WaitForSignalOrExitLocked() {
if (exit_)
return -EINTR;
int ret = pthread_cond_wait(&cond_, &lock_);
if (exit_)
return -EINTR;
return ret;
}
// static
void *Worker::InternalRoutine(void *arg) {
Worker *worker = (Worker *)arg;
setpriority(PRIO_PROCESS, 0, worker->priority_);
while (true) {
int ret = worker->Lock();
if (ret) {
ALOGE("Failed to lock %s thread %d", worker->name_.c_str(), ret);
continue;
}
bool exit = worker->exit_;
ret = worker->Unlock();
if (ret) {
ALOGE("Failed to unlock %s thread %d", worker->name_.c_str(), ret);
break;
}
if (exit)
break;
worker->Routine();
}
return NULL;
}
int Worker::SignalThreadLocked(bool exit) {
if (exit)
exit_ = exit;
int ret = pthread_cond_signal(&cond_);
if (ret) {
ALOGE("Failed to signal condition on %s thread %d", name_.c_str(), ret);
return ret;
}
return 0;
}
}
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