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/*
* Copyright (c) 2010-2015 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/EventLoop/EventLoop.h>
#include <algorithm>
#include <cassert>
#include <boost/bind.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/optional.hpp>
#include <boost/thread/locks.hpp>
#include <Swiften/Base/Log.h>
namespace lambda = boost::lambda;
namespace Swift {
inline void invokeCallback(const Event& event) {
try {
assert(!event.callback.empty());
event.callback();
}
catch (const std::exception& e) {
SWIFT_LOG(error) << "Uncaught exception in event loop: " << e.what() << std::endl;
}
catch (...) {
SWIFT_LOG(error) << "Uncaught non-exception in event loop" << std::endl;
}
}
EventLoop::EventLoop() : nextEventID_(0) {
}
EventLoop::~EventLoop() {
}
void EventLoop::handleNextEvent() {
bool callEventPosted = false;
{
boost::recursive_mutex::scoped_lock lock(removeEventsMutex_);
{
boost::optional<Event> nextEvent;
{
boost::recursive_mutex::scoped_lock lock(eventsMutex_);
if (!events_.empty()) {
nextEvent = events_.front();
events_.pop_front();
}
}
callEventPosted = !events_.empty();
if (nextEvent) {
invokeCallback(nextEvent.get());
}
}
}
if (callEventPosted) {
eventPosted();
}
}
void EventLoop::postEvent(boost::function<void ()> callback, boost::shared_ptr<EventOwner> owner) {
Event event(owner, callback);
bool callEventPosted = false;
{
boost::recursive_mutex::scoped_lock lock(eventsMutex_);
callEventPosted = events_.empty();
event.id = nextEventID_;
nextEventID_++;
events_.push_back(event);
}
if (callEventPosted) {
eventPosted();
}
}
void EventLoop::removeEventsFromOwner(boost::shared_ptr<EventOwner> owner) {
boost::recursive_mutex::scoped_lock removeLock(removeEventsMutex_);
boost::recursive_mutex::scoped_lock lock(eventsMutex_);
events_.remove_if(lambda::bind(&Event::owner, lambda::_1) == owner);
}
}
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Swift