zmusic/source/musicformats/win32/helperthread.h
Christoph Oelckers a4eae42ec5 - initial commit
2020-01-02 17:52:30 +01:00

85 lines
2.7 KiB
C++

/*
** helperthread.h
**
**---------------------------------------------------------------------------
** Copyright 1998-2006 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#ifndef __HELPERTHREAD_H__
#define __HELPERTHREAD_H__
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
class FHelperThread
{
struct Message
{
DWORD Method;
DWORD Parm1, Parm2, Parm3;
HANDLE CompletionEvent; // Set to signalled when message is finished processing
DWORD Return;
};
enum { MSG_QUEUE_SIZE = 8 };
public:
FHelperThread ();
virtual ~FHelperThread ();
void DestroyThread ();
bool LaunchThread ();
DWORD SendMessage (DWORD method, DWORD parm1, DWORD parm2,
DWORD parm3, bool wait);
bool HaveThread () const;
protected:
enum EThreadEvents { THREAD_NewMessage, THREAD_KillSelf };
virtual bool Init () { return true; }
virtual void Deinit () {}
virtual void DefaultDispatch () {}
virtual DWORD Dispatch (DWORD method, DWORD parm1=0, DWORD parm2=0, DWORD parm3=0) = 0;
virtual const char *ThreadName () = 0;
HANDLE ThreadHandle;
DWORD ThreadID;
HANDLE Thread_Events[2];
CRITICAL_SECTION Thread_Critical;
Message Messages[MSG_QUEUE_SIZE];
DWORD MessageHead;
DWORD MessageTail;
private:
void ReleaseSynchronizers ();
static DWORD WINAPI ThreadLaunch (LPVOID me);
DWORD ThreadLoop ();
};
#endif //__HELPERTHREAD_H__