mirror of
https://github.com/strawberrymusicplayer/strawberry
synced 2024-12-22 21:48:03 +01:00
95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/* This file is part of Strawberry.
|
|
Copyright 2011, David Sansome <me@davidsansome.com>
|
|
|
|
Strawberry 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.
|
|
|
|
Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef MESSAGEREPLY_H
|
|
#define MESSAGEREPLY_H
|
|
|
|
#include <QtGlobal>
|
|
#include <QObject>
|
|
#include <QSemaphore>
|
|
#include <QString>
|
|
|
|
#include "core/logging.h"
|
|
|
|
// Base QObject for a reply future class that is returned immediately for requests that will occur in the background.
|
|
// Similar to QNetworkReply. Use MessageReply instead.
|
|
class _MessageReplyBase : public QObject {
|
|
Q_OBJECT
|
|
|
|
public:
|
|
_MessageReplyBase(QObject *parent = nullptr);
|
|
|
|
virtual int id() const = 0;
|
|
bool is_finished() const { return finished_; }
|
|
bool is_successful() const { return success_; }
|
|
|
|
// Waits for the reply to finish by waiting on a semaphore. Never call this from the MessageHandler's thread or it will block forever.
|
|
// Returns true if the call was successful.
|
|
bool WaitForFinished();
|
|
|
|
void Abort();
|
|
|
|
signals:
|
|
void Finished(bool success);
|
|
|
|
protected:
|
|
bool finished_;
|
|
bool success_;
|
|
|
|
QSemaphore semaphore_;
|
|
};
|
|
|
|
// A reply future class that is returned immediately for requests that will occur in the background. Similar to QNetworkReply.
|
|
template <typename MessageType>
|
|
class MessageReply : public _MessageReplyBase {
|
|
public:
|
|
MessageReply(const MessageType& request_message, QObject *parent = nullptr);
|
|
|
|
int id() const { return request_message_.id(); }
|
|
const MessageType& request_message() const { return request_message_; }
|
|
const MessageType& message() const { return reply_message_; }
|
|
|
|
void SetReply(const MessageType& message);
|
|
|
|
private:
|
|
MessageType request_message_;
|
|
MessageType reply_message_;
|
|
};
|
|
|
|
|
|
template<typename MessageType>
|
|
MessageReply<MessageType>::MessageReply(const MessageType& request_message, QObject *parent)
|
|
: _MessageReplyBase(parent)
|
|
{
|
|
request_message_.MergeFrom(request_message);
|
|
}
|
|
|
|
template<typename MessageType>
|
|
void MessageReply<MessageType>::SetReply(const MessageType& message) {
|
|
Q_ASSERT(!finished_);
|
|
|
|
reply_message_.MergeFrom(message);
|
|
finished_ = true;
|
|
success_ = true;
|
|
|
|
emit Finished(success_);
|
|
qLog(Debug) << "Releasing ID" << id() << "(finished)";
|
|
semaphore_.release();
|
|
}
|
|
|
|
#endif // MESSAGEREPLY_H
|