Initial commit

backends/networking/http/connectionmanager.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "backends/networking/http/connectionmanager.h"
+#include "backends/networking/http/networkreadstream.h"
+#include "common/debug.h"
+#include "common/system.h"
+#include "common/timer.h"
+
+namespace Common {
+
+DECLARE_SINGLETON(Networking::ConnectionManager);
+
+/* The makeInstance function is defined in the platform specific source file */
+
+} // namespace Common
+
+namespace Networking {
+ConnectionManager::ConnectionManager() : _timerStarted(false), _frame(0) {}
+
+ConnectionManager::~ConnectionManager() {
+	stopTimer();
+
+	// terminate all added requests which haven't been processed yet
+	_addedRequestsMutex.lock();
+	for (auto &curRequest : _addedRequests) {
+		Request *request = curRequest.request;
+		RequestCallback callback = curRequest.onDeleteCallback;
+		if (request)
+			request->finish();
+		delete request;
+		if (callback) {
+			(*callback)(request);
+			delete callback;
+		}
+	}
+	_addedRequests.clear();
+	_addedRequestsMutex.unlock();
+
+	// terminate all requests
+	_handleMutex.lock();
+	for (auto &curRequest : _requests) {
+		Request *request = curRequest.request;
+		RequestCallback callback = curRequest.onDeleteCallback;
+		if (request)
+			request->finish();
+		delete request;
+		if (callback) {
+			(*callback)(request);
+			delete callback;
+		}
+	}
+	_requests.clear();
+
+	_handleMutex.unlock();
+}
+
+Request *ConnectionManager::addRequest(Request *request, RequestCallback callback) {
+	_addedRequestsMutex.lock();
+	_addedRequests.push_back(RequestWithCallback(request, callback));
+	if (!_timerStarted)
+		startTimer();
+	_addedRequestsMutex.unlock();
+	return request;
+}
+
+uint32 ConnectionManager::getCloudRequestsPeriodInMicroseconds() {
+	return TIMER_INTERVAL * ITERATION_PERIOD;
+}
+
+// private goes here:
+
+void connectionsThread(void *ignored) {
+	ConnMan.handle();
+}
+
+void ConnectionManager::startTimer(int interval) {
+	Common::TimerManager *manager = g_system->getTimerManager();
+	if (manager->installTimerProc(connectionsThread, interval, nullptr, "Networking::ConnectionManager's Timer")) {
+		_timerStarted = true;
+	} else {
+		warning("Failed to install Networking::ConnectionManager's timer");
+	}
+}
+
+void ConnectionManager::stopTimer() {
+	debug(9, "timer stopped");
+	Common::TimerManager *manager = g_system->getTimerManager();
+	manager->removeTimerProc(connectionsThread);
+	_timerStarted = false;
+}
+
+bool ConnectionManager::hasAddedRequests() {
+	_addedRequestsMutex.lock();
+	bool hasNewRequests = !_addedRequests.empty();
+	_addedRequestsMutex.unlock();
+	return hasNewRequests;
+}
+
+void ConnectionManager::handle() {
+	// lock mutex here (in case another handle() would be called before this one ends)
+	_handleMutex.lock();
+	++_frame;
+	if (_frame % ITERATION_PERIOD == 0)
+		iterateRequests();
+	if (_frame % PROCESSING_PERIOD == 0)
+		processTransfers();
+
+	if (_requests.empty() && !hasAddedRequests())
+		stopTimer();
+	_handleMutex.unlock();
+}
+
+void ConnectionManager::iterateRequests() {
+	// add new requests
+	_addedRequestsMutex.lock();
+	for (auto &addedRequest : _addedRequests) {
+		_requests.push_back(addedRequest);
+	}
+	_addedRequests.clear();
+	_addedRequestsMutex.unlock();
+
+	// call handle() of all running requests (so they can do their work)
+	if (_frame % DEBUG_PRINT_PERIOD == 0)
+		debug(9, "handling %d request(s)", _requests.size());
+	for (Common::Array<RequestWithCallback>::iterator i = _requests.begin(); i != _requests.end();) {
+		Request *request = i->request;
+		if (request) {
+			if (request->state() == PROCESSING)
+				request->handle();
+			else if (request->state() == RETRY)
+				request->handleRetry();
+		}
+
+		if (!request || request->state() == FINISHED) {
+			delete (i->request);
+			if (i->onDeleteCallback) {
+				(*i->onDeleteCallback)(i->request); // that's not a mistake (we're passing an address and that method knows there is no object anymore)
+				delete i->onDeleteCallback;
+			}
+			_requests.erase(i);
+			continue;
+		}
+
+		++i;
+	}
+}
+
+} // End of namespace Networking