mock-ril/src/cpp/worker.cpp - platform/hardware/ril - Git at Google

 /**
  * 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 "logging.h"
 #include "status.h"
 #include "worker.h"

 #include <time.h>

 //#define WORKER_DEBUG
 #ifdef  WORKER_DEBUG

 #define DBG(...) ALOGD(__VA_ARGS__)

 #else

 #define DBG(...)

 #endif

 void * WorkerThread::Work(void *param) {
     WorkerThread *t = (WorkerThread *)param;
     android_atomic_acquire_store(STATE_RUNNING, &t->state_);
     void * v = t->Worker(t->workerParam_);
     android_atomic_acquire_store(STATE_STOPPED, &t->state_);
     return v;
 }

 bool WorkerThread::isRunning() {
     DBG("WorkerThread::isRunning E");
     bool ret_value = android_atomic_acquire_load(&state_) == STATE_RUNNING;
     DBG("WorkerThread::isRunning X ret_value=%d", ret_value);
     return ret_value;
 }

 WorkerThread::WorkerThread() {
     DBG("WorkerThread::WorkerThread E");
     state_ = STATE_INITIALIZED;
     pthread_mutex_init(&mutex_, NULL);
     pthread_cond_init(&cond_, NULL);
     DBG("WorkerThread::WorkerThread X");
 }

 WorkerThread::~WorkerThread() {
     DBG("WorkerThread::~WorkerThread E");
     Stop();
     pthread_mutex_destroy(&mutex_);
     DBG("WorkerThread::~WorkerThread X");
 }

 // Return true if changed from STATE_RUNNING to STATE_STOPPING
 bool WorkerThread::BeginStopping() {
     DBG("WorkerThread::BeginStopping E");
     bool ret_value = (android_atomic_acquire_cas(STATE_RUNNING, STATE_STOPPING, &state_) == 0);
     DBG("WorkerThread::BeginStopping X ret_value=%d", ret_value);
     return ret_value;
 }

 // Wait until state is not STATE_STOPPING
 void WorkerThread::WaitUntilStopped() {
     DBG("WorkerThread::WaitUntilStopped E");
     pthread_cond_signal(&cond_);
     while(android_atomic_release_load(&state_) == STATE_STOPPING) {
         usleep(200000);
     }
     DBG("WorkerThread::WaitUntilStopped X");
 }

 void WorkerThread::Stop() {
     DBG("WorkerThread::Stop E");
     if (BeginStopping()) {
         WaitUntilStopped();
     }
     DBG("WorkerThread::Stop X");
 }

 int WorkerThread::Run(void *workerParam) {
     DBG("WorkerThread::Run E workerParam=%p", workerParam);
     int status;
     int ret;

     workerParam_ = workerParam;

     ret = pthread_attr_init(&attr_);
     if (ret != 0) {
         ALOGE("RIL_Init X: pthread_attr_init failed err=%s", strerror(ret));
         return STATUS_ERR;
     }
     ret = pthread_attr_setdetachstate(&attr_, PTHREAD_CREATE_DETACHED);
     if (ret != 0) {
         ALOGE("RIL_Init X: pthread_attr_setdetachstate failed err=%s",
                 strerror(ret));
         return STATUS_ERR;
     }
     ret = pthread_create(&tid_, &attr_,
                 (void * (*)(void *))&WorkerThread::Work, this);
     if (ret != 0) {
         ALOGE("RIL_Init X: pthread_create failed err=%s", strerror(ret));
         return STATUS_ERR;
     }

     // Wait until worker is running
     while (android_atomic_acquire_load(&state_) == STATE_INITIALIZED) {
         usleep(200000);
     }

     DBG("WorkerThread::Run X workerParam=%p", workerParam);
     return STATUS_OK;
 }


 class WorkerQueueThread : public WorkerThread {
   private:
     friend class WorkerQueue;

   public:
     WorkerQueueThread() {
     }

     virtual ~WorkerQueueThread() {
         Stop();
     }

     void * Worker(void *param) {
         DBG("WorkerQueueThread::Worker E");
         WorkerQueue *wq = (WorkerQueue *)param;

         // Do the work until we're told to stop
         while (isRunning()) {
             pthread_mutex_lock(&mutex_);
             while (isRunning() && wq->q_.size() == 0) {
                 if (wq->delayed_q_.size() == 0) {
                     // Both queue's are empty so wait
                     pthread_cond_wait(&cond_, &mutex_);
                 } else {
                     // delayed_q_ is not empty, move any
                     // timed out records to q_.
                     int64_t now = android::elapsedRealtime();
                     while((wq->delayed_q_.size() != 0) &&
                             ((wq->delayed_q_.top()->time - now) <= 0)) {
                         struct WorkerQueue::Record *r = wq->delayed_q_.top();
                         DBG("WorkerQueueThread::Worker move p=%p time=%lldms",
                                 r->p, r->time);
                         wq->delayed_q_.pop();
                         wq->q_.push_back(r);
                     }

                     if ((wq->q_.size() == 0) && (wq->delayed_q_.size() != 0)) {
                         // We need to do a timed wait
                         struct timeval tv;
                         struct timespec ts;
                         struct WorkerQueue::Record *r = wq->delayed_q_.top();
                         int64_t delay_ms = r->time - now;
                         DBG("WorkerQueueThread::Worker wait"
                             " p=%p time=%lldms delay_ms=%lldms",
                                 r->p, r->time, delay_ms);
                         gettimeofday(&tv, NULL);
                         ts.tv_sec = tv.tv_sec + (delay_ms / 1000);
                         ts.tv_nsec = (tv.tv_usec +
                                         ((delay_ms % 1000) * 1000)) * 1000;
                         pthread_cond_timedwait(&cond_, &mutex_, &ts);
                     }
                 }
             }
             if (isRunning()) {
                 struct WorkerQueue::Record *r = wq->q_.front();
                 wq->q_.pop_front();
                 void *p = r->p;
                 wq->release_record(r);
                 pthread_mutex_unlock(&mutex_);
                 wq->Process(r->p);
             } else {
                 pthread_mutex_unlock(&mutex_);
             }
         }
         DBG("WorkerQueueThread::Worker X");
         return NULL;
     }
 };

 WorkerQueue::WorkerQueue() {
     DBG("WorkerQueue::WorkerQueue E");
     wqt_ = new WorkerQueueThread();
     DBG("WorkerQueue::WorkerQueue X");
 }

 WorkerQueue::~WorkerQueue() {
     DBG("WorkerQueue::~WorkerQueue E");
     Stop();

     Record *r;
     pthread_mutex_lock(&wqt_->mutex_);
     while(free_list_.size() != 0) {
         r = free_list_.front();
         free_list_.pop_front();
         DBG("WorkerQueue::~WorkerQueue delete free_list_ r=%p", r);
         delete r;
     }
     while(delayed_q_.size() != 0) {
         r = delayed_q_.top();
         delayed_q_.pop();
         DBG("WorkerQueue::~WorkerQueue delete delayed_q_ r=%p", r);
         delete r;
     }
     pthread_mutex_unlock(&wqt_->mutex_);

     delete wqt_;
     DBG("WorkerQueue::~WorkerQueue X");
 }

 int WorkerQueue::Run() {
     return wqt_->Run(this);
 }

 void WorkerQueue::Stop() {
     wqt_->Stop();
 }

 /**
  * Obtain a record from free_list if it is not empty, fill in the record with provided
  * information: *p and delay_in_ms
  */
 struct WorkerQueue::Record *WorkerQueue::obtain_record(void *p, int delay_in_ms) {
     struct Record *r;
     if (free_list_.size() == 0) {
         r = new Record();
         DBG("WorkerQueue::obtain_record new r=%p", r);
     } else {
         r = free_list_.front();
         DBG("WorkerQueue::obtain_record reuse r=%p", r);
         free_list_.pop_front();
     }
     r->p = p;
     if (delay_in_ms != 0) {
         r->time = android::elapsedRealtime() + delay_in_ms;
     } else {
         r->time = 0;
     }
     return r;
 }

 /**
  * release a record and insert into the front of the free_list
  */
 void WorkerQueue::release_record(struct Record *r) {
     DBG("WorkerQueue::release_record r=%p", r);
     free_list_.push_front(r);
 }

 /**
  * Add a record to processing queue q_
  */
 void WorkerQueue::Add(void *p) {
     DBG("WorkerQueue::Add E:");
     pthread_mutex_lock(&wqt_->mutex_);
     struct Record *r = obtain_record(p, 0);
     q_.push_back(r);
     if (q_.size() == 1) {
         pthread_cond_signal(&wqt_->cond_);
     }
     pthread_mutex_unlock(&wqt_->mutex_);
     DBG("WorkerQueue::Add X:");
 }

 void WorkerQueue::AddDelayed(void *p, int delay_in_ms) {
     DBG("WorkerQueue::AddDelayed E:");
     if (delay_in_ms <= 0) {
         Add(p);
     } else {
         pthread_mutex_lock(&wqt_->mutex_);
         struct Record *r = obtain_record(p, delay_in_ms);
         delayed_q_.push(r);
 #ifdef WORKER_DEBUG
         int64_t now = android::elapsedRealtime();
         DBG("WorkerQueue::AddDelayed"
             " p=%p delay_in_ms=%d now=%lldms top->p=%p"
             " top->time=%lldms diff=%lldms",
                 p, delay_in_ms, now, delayed_q_.top()->p,
                 delayed_q_.top()->time, delayed_q_.top()->time - now);
 #endif
         if ((q_.size() == 0) && (delayed_q_.top() == r)) {
             // q_ is empty and the new record is at delayed_q_.top
             // so we signal the waiting thread so it can readjust
             // the wait time.
             DBG("WorkerQueue::AddDelayed signal");
             pthread_cond_signal(&wqt_->cond_);
         }
         pthread_mutex_unlock(&wqt_->mutex_);
     }
     DBG("WorkerQueue::AddDelayed X:");
 }


 class TestWorkerQueue : public WorkerQueue {
     virtual void Process(void *p) {
         ALOGD("TestWorkerQueue::Process: EX p=%p", p);
     }
 };

 class TesterThread : public WorkerThread {
   public:
     void * Worker(void *param)
     {
         ALOGD("TesterThread::Worker E param=%p", param);
         WorkerQueue *wq = (WorkerQueue *)param;

         // Test AddDelayed
         wq->AddDelayed((void *)1000, 1000);
         wq->Add((void *)0);
         wq->Add((void *)0);
         wq->Add((void *)0);
         wq->Add((void *)0);
         wq->AddDelayed((void *)100, 100);
         wq->AddDelayed((void *)2000, 2000);

         for (int i = 1; isRunning(); i++) {
             ALOGD("TesterThread: looping %d", i);
             wq->Add((void *)i);
             wq->Add((void *)i);
             wq->Add((void *)i);
             wq->Add((void *)i);
             sleep(1);
         }

         ALOGD("TesterThread::Worker X param=%p", param);

         return NULL;
     }
 };

 void testWorker() {
     ALOGD("testWorker E: ********");

     // Test we can create a thread and delete it
     TesterThread *tester = new TesterThread();
     delete tester;

     TestWorkerQueue *wq = new TestWorkerQueue();
     if (wq->Run() == STATUS_OK) {
         ALOGD("testWorker WorkerQueue %p running", wq);

         // Test we can run a thread, stop it then delete it
         tester = new TesterThread();
         tester->Run(wq);
         ALOGD("testWorker tester %p running", tester);
         sleep(10);
         ALOGD("testWorker tester %p stopping", tester);
         tester->Stop();
         ALOGD("testWorker tester %p stopped", tester);
         wq->Stop();
         ALOGD("testWorker wq %p stopped", wq);
     }
     ALOGD("testWorker X: ********\n");
 }
	/**
	* 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 "logging.h"
	#include "status.h"
	#include "worker.h"

	#include <time.h>

	//#define WORKER_DEBUG
	#ifdef WORKER_DEBUG

	#define DBG(...) ALOGD(__VA_ARGS__)

	#else

	#define DBG(...)

	#endif

	void * WorkerThread::Work(void *param) {
	WorkerThread t = (WorkerThread )param;
	android_atomic_acquire_store(STATE_RUNNING, &t->state_);
	void * v = t->Worker(t->workerParam_);
	android_atomic_acquire_store(STATE_STOPPED, &t->state_);
	return v;
	}

	bool WorkerThread::isRunning() {
	DBG("WorkerThread::isRunning E");
	bool ret_value = android_atomic_acquire_load(&state_) == STATE_RUNNING;
	DBG("WorkerThread::isRunning X ret_value=%d", ret_value);
	return ret_value;
	}

	WorkerThread::WorkerThread() {
	DBG("WorkerThread::WorkerThread E");
	state_ = STATE_INITIALIZED;
	pthread_mutex_init(&mutex_, NULL);
	pthread_cond_init(&cond_, NULL);
	DBG("WorkerThread::WorkerThread X");
	}

	WorkerThread::~WorkerThread() {
	DBG("WorkerThread::~WorkerThread E");
	Stop();
	pthread_mutex_destroy(&mutex_);
	DBG("WorkerThread::~WorkerThread X");
	}

	// Return true if changed from STATE_RUNNING to STATE_STOPPING
	bool WorkerThread::BeginStopping() {
	DBG("WorkerThread::BeginStopping E");
	bool ret_value = (android_atomic_acquire_cas(STATE_RUNNING, STATE_STOPPING, &state_) == 0);
	DBG("WorkerThread::BeginStopping X ret_value=%d", ret_value);
	return ret_value;
	}

	// Wait until state is not STATE_STOPPING
	void WorkerThread::WaitUntilStopped() {
	DBG("WorkerThread::WaitUntilStopped E");
	pthread_cond_signal(&cond_);
	while(android_atomic_release_load(&state_) == STATE_STOPPING) {
	usleep(200000);
	}
	DBG("WorkerThread::WaitUntilStopped X");
	}

	void WorkerThread::Stop() {
	DBG("WorkerThread::Stop E");
	if (BeginStopping()) {
	WaitUntilStopped();
	}
	DBG("WorkerThread::Stop X");
	}

	int WorkerThread::Run(void *workerParam) {
	DBG("WorkerThread::Run E workerParam=%p", workerParam);
	int status;
	int ret;

	workerParam_ = workerParam;

	ret = pthread_attr_init(&attr_);
	if (ret != 0) {
	ALOGE("RIL_Init X: pthread_attr_init failed err=%s", strerror(ret));
	return STATUS_ERR;
	}
	ret = pthread_attr_setdetachstate(&attr_, PTHREAD_CREATE_DETACHED);
	if (ret != 0) {
	ALOGE("RIL_Init X: pthread_attr_setdetachstate failed err=%s",
	strerror(ret));
	return STATUS_ERR;
	}
	ret = pthread_create(&tid_, &attr_,
	(void * ()(void ))&WorkerThread::Work, this);
	if (ret != 0) {
	ALOGE("RIL_Init X: pthread_create failed err=%s", strerror(ret));
	return STATUS_ERR;
	}

	// Wait until worker is running
	while (android_atomic_acquire_load(&state_) == STATE_INITIALIZED) {
	usleep(200000);
	}

	DBG("WorkerThread::Run X workerParam=%p", workerParam);
	return STATUS_OK;
	}


	class WorkerQueueThread : public WorkerThread {
	private:
	friend class WorkerQueue;

	public:
	WorkerQueueThread() {
	}

	virtual ~WorkerQueueThread() {
	Stop();
	}

	void * Worker(void *param) {
	DBG("WorkerQueueThread::Worker E");
	WorkerQueue wq = (WorkerQueue )param;

	// Do the work until we're told to stop
	while (isRunning()) {
	pthread_mutex_lock(&mutex_);
	while (isRunning() && wq->q_.size() == 0) {
	if (wq->delayed_q_.size() == 0) {
	// Both queue's are empty so wait
	pthread_cond_wait(&cond_, &mutex_);
	} else {
	// delayed_q_ is not empty, move any
	// timed out records to q_.
	int64_t now = android::elapsedRealtime();
	while((wq->delayed_q_.size() != 0) &&
	((wq->delayed_q_.top()->time - now) <= 0)) {
	struct WorkerQueue::Record *r = wq->delayed_q_.top();
	DBG("WorkerQueueThread::Worker move p=%p time=%lldms",
	r->p, r->time);
	wq->delayed_q_.pop();
	wq->q_.push_back(r);
	}

	if ((wq->q_.size() == 0) && (wq->delayed_q_.size() != 0)) {
	// We need to do a timed wait
	struct timeval tv;
	struct timespec ts;
	struct WorkerQueue::Record *r = wq->delayed_q_.top();
	int64_t delay_ms = r->time - now;
	DBG("WorkerQueueThread::Worker wait"
	" p=%p time=%lldms delay_ms=%lldms",
	r->p, r->time, delay_ms);
	gettimeofday(&tv, NULL);
	ts.tv_sec = tv.tv_sec + (delay_ms / 1000);
	ts.tv_nsec = (tv.tv_usec +
	((delay_ms % 1000) * 1000)) * 1000;
	pthread_cond_timedwait(&cond_, &mutex_, &ts);
	}
	}
	}
	if (isRunning()) {
	struct WorkerQueue::Record *r = wq->q_.front();
	wq->q_.pop_front();
	void *p = r->p;
	wq->release_record(r);
	pthread_mutex_unlock(&mutex_);
	wq->Process(r->p);
	} else {
	pthread_mutex_unlock(&mutex_);
	}
	}
	DBG("WorkerQueueThread::Worker X");
	return NULL;
	}
	};

	WorkerQueue::WorkerQueue() {
	DBG("WorkerQueue::WorkerQueue E");
	wqt_ = new WorkerQueueThread();
	DBG("WorkerQueue::WorkerQueue X");
	}

	WorkerQueue::~WorkerQueue() {
	DBG("WorkerQueue::~WorkerQueue E");
	Stop();

	Record *r;
	pthread_mutex_lock(&wqt_->mutex_);
	while(free_list_.size() != 0) {
	r = free_list_.front();
	free_list_.pop_front();
	DBG("WorkerQueue::~WorkerQueue delete free_list_ r=%p", r);
	delete r;
	}
	while(delayed_q_.size() != 0) {
	r = delayed_q_.top();
	delayed_q_.pop();
	DBG("WorkerQueue::~WorkerQueue delete delayed_q_ r=%p", r);
	delete r;
	}
	pthread_mutex_unlock(&wqt_->mutex_);

	delete wqt_;
	DBG("WorkerQueue::~WorkerQueue X");
	}

	int WorkerQueue::Run() {
	return wqt_->Run(this);
	}

	void WorkerQueue::Stop() {
	wqt_->Stop();
	}

	/**
	* Obtain a record from free_list if it is not empty, fill in the record with provided
	* information: *p and delay_in_ms
	*/
	struct WorkerQueue::Record WorkerQueue::obtain_record(void p, int delay_in_ms) {
	struct Record *r;
	if (free_list_.size() == 0) {
	r = new Record();
	DBG("WorkerQueue::obtain_record new r=%p", r);
	} else {
	r = free_list_.front();
	DBG("WorkerQueue::obtain_record reuse r=%p", r);
	free_list_.pop_front();
	}
	r->p = p;
	if (delay_in_ms != 0) {
	r->time = android::elapsedRealtime() + delay_in_ms;
	} else {
	r->time = 0;
	}
	return r;
	}

	/**
	* release a record and insert into the front of the free_list
	*/
	void WorkerQueue::release_record(struct Record *r) {
	DBG("WorkerQueue::release_record r=%p", r);
	free_list_.push_front(r);
	}

	/**
	* Add a record to processing queue q_
	*/
	void WorkerQueue::Add(void *p) {
	DBG("WorkerQueue::Add E:");
	pthread_mutex_lock(&wqt_->mutex_);
	struct Record *r = obtain_record(p, 0);
	q_.push_back(r);
	if (q_.size() == 1) {
	pthread_cond_signal(&wqt_->cond_);
	}
	pthread_mutex_unlock(&wqt_->mutex_);
	DBG("WorkerQueue::Add X:");
	}

	void WorkerQueue::AddDelayed(void *p, int delay_in_ms) {
	DBG("WorkerQueue::AddDelayed E:");
	if (delay_in_ms <= 0) {
	Add(p);
	} else {
	pthread_mutex_lock(&wqt_->mutex_);
	struct Record *r = obtain_record(p, delay_in_ms);
	delayed_q_.push(r);
	#ifdef WORKER_DEBUG
	int64_t now = android::elapsedRealtime();
	DBG("WorkerQueue::AddDelayed"
	" p=%p delay_in_ms=%d now=%lldms top->p=%p"
	" top->time=%lldms diff=%lldms",
	p, delay_in_ms, now, delayed_q_.top()->p,
	delayed_q_.top()->time, delayed_q_.top()->time - now);
	#endif
	if ((q_.size() == 0) && (delayed_q_.top() == r)) {
	// q_ is empty and the new record is at delayed_q_.top
	// so we signal the waiting thread so it can readjust
	// the wait time.
	DBG("WorkerQueue::AddDelayed signal");
	pthread_cond_signal(&wqt_->cond_);
	}
	pthread_mutex_unlock(&wqt_->mutex_);
	}
	DBG("WorkerQueue::AddDelayed X:");
	}


	class TestWorkerQueue : public WorkerQueue {
	virtual void Process(void *p) {
	ALOGD("TestWorkerQueue::Process: EX p=%p", p);
	}
	};

	class TesterThread : public WorkerThread {
	public:
	void * Worker(void *param)
	{
	ALOGD("TesterThread::Worker E param=%p", param);
	WorkerQueue wq = (WorkerQueue )param;

	// Test AddDelayed
	wq->AddDelayed((void *)1000, 1000);
	wq->Add((void *)0);
	wq->Add((void *)0);
	wq->Add((void *)0);
	wq->Add((void *)0);
	wq->AddDelayed((void *)100, 100);
	wq->AddDelayed((void *)2000, 2000);

	for (int i = 1; isRunning(); i++) {
	ALOGD("TesterThread: looping %d", i);
	wq->Add((void *)i);
	wq->Add((void *)i);
	wq->Add((void *)i);
	wq->Add((void *)i);
	sleep(1);
	}

	ALOGD("TesterThread::Worker X param=%p", param);

	return NULL;
	}
	};

	void testWorker() {
	ALOGD("testWorker E: ********");

	// Test we can create a thread and delete it
	TesterThread *tester = new TesterThread();
	delete tester;

	TestWorkerQueue *wq = new TestWorkerQueue();
	if (wq->Run() == STATUS_OK) {
	ALOGD("testWorker WorkerQueue %p running", wq);

	// Test we can run a thread, stop it then delete it
	tester = new TesterThread();
	tester->Run(wq);
	ALOGD("testWorker tester %p running", tester);
	sleep(10);
	ALOGD("testWorker tester %p stopping", tester);
	tester->Stop();
	ALOGD("testWorker tester %p stopped", tester);
	wq->Stop();
	ALOGD("testWorker wq %p stopped", wq);
	}
	ALOGD("testWorker X: ********\n");
	}