File indexing completed on 2024-06-16 04:50:12

 /*
     SPDX-FileCopyrightText: 2018 Daniel Vrátil <dvratil@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #pragma once
 
 class QObject;
 
 #include <QMutex>
 #include <QQueue>
 
 #include "private/protocol_p.h"
 
 #include "akonadicore_debug.h"
 
 namespace Akonadi
 {
 class CommandBufferLocker;
 class CommandBufferNotifyBlocker;
 
 class CommandBuffer
 {
     friend class CommandBufferLocker;
     friend class CommandBufferNotifyBlocker;
 
 public:
     struct Command {
         qint64 tag;
         Protocol::CommandPtr command;
     };
 
     CommandBuffer(QObject *parent, const char *notifySlot)
         : mParent(parent)
         , mNotifySlot(notifySlot)
     {
     }
 
     void enqueue(qint64 tag, const Protocol::CommandPtr &command)
     {
         mCommands.enqueue({tag, command});
         if (mNotify) {
             const bool ok = QMetaObject::invokeMethod(mParent, mNotifySlot.constData(), Qt::QueuedConnection);
             Q_ASSERT(ok);
             Q_UNUSED(ok)
         }
     }
 
     inline Command dequeue()
     {
         return mCommands.dequeue();
     }
 
     inline bool isEmpty() const
     {
         return mCommands.isEmpty();
     }
 
     inline int size() const
     {
         return mCommands.size();
     }
 
 private:
     Q_DISABLE_COPY_MOVE(CommandBuffer)
 
     QObject *mParent = nullptr;
     QByteArray mNotifySlot;
 
     QQueue<Command> mCommands;
     QMutex mLock;
 
     bool mNotify = true;
 };
 
 class CommandBufferLocker
 {
 public:
     explicit CommandBufferLocker(CommandBuffer *buffer)
         : mBuffer(buffer)
     {
         relock();
     }
 
     ~CommandBufferLocker()
     {
         unlock();
     }
 
     inline void unlock()
     {
         if (mLocked) {
             mBuffer->mLock.unlock();
             mLocked = false;
         }
     }
 
     inline void relock()
     {
         if (!mLocked) {
             mBuffer->mLock.lock();
             mLocked = true;
         }
     }
 
 private:
     Q_DISABLE_COPY_MOVE(CommandBufferLocker)
 
     CommandBuffer *mBuffer = nullptr;
     bool mLocked = false;
 };
 
 class CommandBufferNotifyBlocker
 {
 public:
     explicit CommandBufferNotifyBlocker(CommandBuffer *buffer)
         : mBuffer(buffer)
     {
         mBuffer->mNotify = false;
     }
 
     ~CommandBufferNotifyBlocker()
     {
         unblock();
     }
 
     void unblock()
     {
         mBuffer->mNotify = true;
     }
 
 private:
     Q_DISABLE_COPY_MOVE(CommandBufferNotifyBlocker)
 
     CommandBuffer *mBuffer;
 };
 
 } // namespace