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#include "MCOperationQueue.h"
#include <libetpan/libetpan.h>
#include "MCOperation.h"
#include "MCOperationCallback.h"
#include "MCOperationQueueCallback.h"
#include "MCMainThread.h"
#include "MCUtils.h"
#include "MCArray.h"
#include "MCLog.h"
#include "MCAutoreleasePool.h"
#include "MCMainThreadAndroid.h"
#include "MCAssert.h"
using namespace mailcore;
OperationQueue::OperationQueue()
{
mOperations = new Array();
mStarted = false;
pthread_mutex_init(&mLock, NULL);
mWaiting = false;
mOperationSem = mailsem_new();
mStartSem = mailsem_new();
mStopSem = mailsem_new();
mWaitingFinishedSem = mailsem_new();
mQuitting = false;
mCallback = NULL;
#if __APPLE__
mDispatchQueue = dispatch_get_main_queue();
#endif
_pendingCheckRunning = false;
}
OperationQueue::~OperationQueue()
{
#if __APPLE__
if (mDispatchQueue != NULL) {
dispatch_release(mDispatchQueue);
}
#endif
MC_SAFE_RELEASE(mOperations);
pthread_mutex_destroy(&mLock);
mailsem_free(mOperationSem);
mailsem_free(mStartSem);
mailsem_free(mStopSem);
mailsem_free(mWaitingFinishedSem);
}
void OperationQueue::addOperation(Operation * op)
{
pthread_mutex_lock(&mLock);
mOperations->addObject(op);
pthread_mutex_unlock(&mLock);
mailsem_up(mOperationSem);
startThread();
}
void OperationQueue::cancelAllOperations()
{
pthread_mutex_lock(&mLock);
for (unsigned int i = 0 ; i < mOperations->count() ; i ++) {
Operation * op = (Operation *) mOperations->objectAtIndex(i);
op->cancel();
}
pthread_mutex_unlock(&mLock);
}
void OperationQueue::runOperationsOnThread(OperationQueue * queue)
{
queue->runOperations();
}
void OperationQueue::runOperations()
{
#if defined(__ANDROID) || defined(ANDROID)
androidSetupThread();
#endif
MCLog("start thread");
mailsem_up(mStartSem);
while (true) {
Operation * op = NULL;
bool needsCheckRunning = false;
bool quitting;
AutoreleasePool * pool = new AutoreleasePool();
mailsem_down(mOperationSem);
pthread_mutex_lock(&mLock);
if (mOperations->count() > 0) {
op = (Operation *) mOperations->objectAtIndex(0);
}
quitting = mQuitting;
pthread_mutex_unlock(&mLock);
//MCLog("quitting %i %p", mQuitting, op);
if ((op == NULL) && quitting) {
MCLog("stopping %p", this);
mailsem_up(mStopSem);
retain(); // (2)
#if __APPLE__
performMethodOnDispatchQueue((Object::Method) &OperationQueue::stoppedOnMainThread, NULL, mDispatchQueue, true);
#else
performMethodOnMainThread((Object::Method) &OperationQueue::stoppedOnMainThread, NULL, true);
#endif
pool->release();
break;
}
MCAssert(op != NULL);
performOnCallbackThread(op, (Object::Method) &OperationQueue::beforeMain, op, true);
if (!op->isCancelled() || op->shouldRunWhenCancelled()) {
op->main();
}
op->retain()->autorelease();
pthread_mutex_lock(&mLock);
mOperations->removeObjectAtIndex(0);
if (mOperations->count() == 0) {
if (mWaiting) {
mailsem_up(mWaitingFinishedSem);
}
needsCheckRunning = true;
}
pthread_mutex_unlock(&mLock);
if (!op->isCancelled()) {
performOnCallbackThread(op, (Object::Method) &OperationQueue::callbackOnMainThread, op, true);
}
if (needsCheckRunning) {
retain(); // (1)
//MCLog("check running %p", this);
#if __APPLE__
performMethodOnDispatchQueue((Object::Method) &OperationQueue::checkRunningOnMainThread, this, mDispatchQueue);
#else
performMethodOnMainThread((Object::Method) &OperationQueue::checkRunningOnMainThread, this);
#endif
}
pool->release();
}
MCLog("cleanup thread %p", this);
#if defined(__ANDROID) || defined(ANDROID)
androidUnsetupThread();
#endif
}
void OperationQueue::performOnCallbackThread(Operation * op, Method method, void * context, bool waitUntilDone)
{
#if __APPLE__
dispatch_queue_t queue = op->callbackDispatchQueue();
if (queue == NULL) {
queue = dispatch_get_main_queue();
}
performMethodOnDispatchQueue(method, context, queue, waitUntilDone);
#else
performMethodOnMainThread(method, context, waitUntilDone);
#endif
}
void OperationQueue::beforeMain(Operation * op)
{
op->beforeMain();
}
void OperationQueue::callbackOnMainThread(Operation * op)
{
op->afterMain();
if (op->isCancelled())
return;
if (op->callback() != NULL) {
op->callback()->operationFinished(op);
}
}
void OperationQueue::checkRunningOnMainThread(void * context)
{
retain(); // (4)
if (_pendingCheckRunning) {
#if __APPLE__
cancelDelayedPerformMethodOnDispatchQueue((Object::Method) &OperationQueue::checkRunningAfterDelay, NULL, mDispatchQueue);
#else
cancelDelayedPerformMethod((Object::Method) &OperationQueue::checkRunningAfterDelay, NULL);
#endif
release(); // (4)
}
_pendingCheckRunning = true;
#if __APPLE__
performMethodOnDispatchQueueAfterDelay((Object::Method) &OperationQueue::checkRunningAfterDelay, NULL, mDispatchQueue, 1);
#else
performMethodAfterDelay((Object::Method) &OperationQueue::checkRunningAfterDelay, NULL, 1);
#endif
release(); // (1)
}
void OperationQueue::checkRunningAfterDelay(void * context)
{
_pendingCheckRunning = false;
pthread_mutex_lock(&mLock);
if (!mQuitting) {
if (mOperations->count() == 0) {
MCLog("trying to quit %p", this);
mailsem_up(mOperationSem);
mQuitting = true;
}
}
pthread_mutex_unlock(&mLock);
// Number of operations can't be changed because it runs on main thread.
// And addOperation() should also be called from main thread.
release(); // (4)
}
void OperationQueue::stoppedOnMainThread(void * context)
{
MCLog("thread stopped %p", this);
mailsem_down(mStopSem);
mStarted = false;
if (mCallback) {
mCallback->queueStoppedRunning();
}
if (mOperations->count() > 0) {
//Operations have been added while thread was quitting, so restart automatically
startThread();
}
release(); // (2)
release(); // (3)
}
void OperationQueue::startThread()
{
if (mStarted)
return;
if (mCallback) {
mCallback->queueStartRunning();
}
retain(); // (3)
mQuitting = false;
mStarted = true;
pthread_create(&mThreadID, NULL, (void * (*)(void *)) OperationQueue::runOperationsOnThread, this);
pthread_detach(mThreadID);
mailsem_down(mStartSem);
}
unsigned int OperationQueue::count()
{
unsigned int count;
pthread_mutex_lock(&mLock);
count = mOperations->count();
pthread_mutex_unlock(&mLock);
return count;
}
void OperationQueue::setCallback(OperationQueueCallback * callback)
{
mCallback = callback;
}
OperationQueueCallback * OperationQueue::callback()
{
return mCallback;
}
#if 0
void OperationQueue::waitUntilAllOperationsAreFinished()
{
bool waiting = false;
pthread_mutex_lock(&mLock);
if (mOperations->count() > 0) {
mWaiting = true;
waiting = true;
}
pthread_mutex_unlock(&mLock);
if (waiting) {
sem_wait(&mWaitingFinishedSem);
}
mWaiting = false;
}
#endif
#if __APPLE__
void OperationQueue::setDispatchQueue(dispatch_queue_t dispatchQueue)
{
if (mDispatchQueue != NULL) {
dispatch_release(mDispatchQueue);
}
mDispatchQueue = dispatchQueue;
if (mDispatchQueue != NULL) {
dispatch_retain(mDispatchQueue);
}
}
dispatch_queue_t OperationQueue::dispatchQueue()
{
return mDispatchQueue;
}
#endif
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