#pragma once

#ifndef TTHREADMESSAGE_H

#define TTHREADMESSAGE_H

//! HOW TO USE: subclass TThread::Message (MyMessage, in example) defining what

//! to execute in onDeliver method and than, to send a message to be executed in

//! the main thread:

//  MyMessage().send();

#ifndef TNZCORE_LIGHT

#include <qmutex></qmutex>

#else

#include <windows.h></windows.h>

#endif

#undef DVAPI

#undef DVVAR

#ifdef TNZCORE_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

#include "tcommon.h"

namespace TThread {

bool DVAPI isMainThread();

// This class is used for communication between different threads. Calling the

// 'send' method in a thread, the user defined method 'onDeliver' is executed in

// the mainThread.

// using 'sendblocking', the calling thread will block until the main thread has

// executed the onDeliver function.

// WARNING!! the sendblocking method will cause a deadlock if used in a

// executable without main loop! (such as composer, cleanupper, etc.)

// NOTE: if the 'send' is called in the main thread, then onDeliver is executed

// immediately.

class DVAPI Message {

public:

  Message();

  virtual ~Message(){};

  virtual Message *clone() const = 0;

  virtual void onDeliver()       = 0;

  void send();

  void sendBlocking();

};

#ifdef TNZCORE_LIGHT

class DVAPI Mutex {

public:

  HANDLE m_mutex;

  Mutex() { m_mutex = CreateMutex(NULL, FALSE, NULL); }

  ~Mutex() { CloseHandle(m_mutex); }

  void lock() {

    WaitForSingleObject(m_mutex,  // handle to mutex

                        INFINITE);

  }

  void unlock() { ReleaseMutex(m_mutex); }

private:

  // not implemented

  Mutex(const Mutex &);

  Mutex &operator=(const Mutex &);

};

class DVAPI MutexLocker {

  HANDLE m_mutex;

public:

  MutexLocker(Mutex *mutex) : m_mutex(mutex->m_mutex) {

    WaitForSingleObject(m_mutex, INFINITE);

  }

  ~MutexLocker() { ReleaseMutex(m_mutex); }

};

#else

class DVAPI Mutex final : public QMutex {

public:

  Mutex() : QMutex(QMutex::Recursive) {}

private:

  // not implemented

  Mutex(const Mutex &);

  Mutex &operator=(const Mutex &);

};

typedef QMutexLocker MutexLocker;

#endif

}  // namespace  TThread

//------------------------------------------------------------------------------

//------------------------------------------------------------------------------

#endif