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/***************************************************************************
SyncObject.h - Declaration of a synchroniser - similar to Java's
object synchronisation functionality.
begin : August 2006
copyright : (C) 2006 by Phil Cairns
email : oti169@hotmail.com
$Id: SyncObject.h 2080 2006-08-18 01:53:19Z phil $
This code may be used in compiled form in any way you desire (including
commercial use). The code may be redistributed unmodified by any means
providing it is not sold for profit without the authors written consent,
and providing that this notice and the authors name and all copyright
notices remains intact.
This software is provided "as is" without express or implied warranty. Use
it at your own risk!
***************************************************************************/
#pragma once
namespace Pagaros
{
class SyncObject
{
public:
SyncObject(void)
{
_mutex = CreateMutex(0, FALSE, 0);
_eventOne = CreateEvent(0, FALSE, FALSE, 0);
_eventAll = CreateEvent(0, TRUE, FALSE, 0);
}
~SyncObject(void)
{
CloseHandle(_eventOne);
CloseHandle(_eventAll);
CloseHandle(_mutex);
}
bool lock(void)
{
//ATLTRACE("Locking ... ");
return (WAIT_OBJECT_0 == WaitForSingleObject(_mutex, INFINITE));
}
bool unlock(void)
{
//ATLTRACE("unlocked\n");
return (TRUE == ReleaseMutex(_mutex));
}
virtual bool wait(DWORD millis = INFINITE)
{
HANDLE handles[2] = { _eventOne, _eventAll };
DWORD dwRet = WaitForMultipleObjects(2, handles, FALSE, millis);
return ((WAIT_OBJECT_0 == dwRet) || (WAIT_OBJECT_0 + 1 == dwRet));
}
bool notify(void)
{
return (TRUE == SetEvent(_eventOne));
}
bool notifyAll(void)
{
return (TRUE == SetEvent(_eventAll));
}
bool resetAll(void)
{
return (TRUE == ResetEvent(_eventAll));
}
protected:
HANDLE getEventOne() const { return _eventOne; }
HANDLE getEventAll() const { return _eventAll; }
HANDLE getMutex() const { return _mutex; }
private:
HANDLE _mutex;
HANDLE _eventOne;
HANDLE _eventAll;
};
class SyncLock
{
public:
SyncLock(SyncObject* so) : _so(so) { _so->lock(); }
SyncLock(SyncObject& so) : _so(&so) { _so->lock(); }
~SyncLock() { _so->unlock(); }
bool wait(DWORD millis = INFINITE)
{
bool ret = false;
_so->unlock();
ret = _so->wait(millis);
_so->lock();
return ret;
}
void notify()
{
_so->notify();
}
void notifyAll()
{
_so->notifyAll();
}
void resetAll()
{
_so->resetAll();
}
private:
SyncObject* _so;
};
};
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