GameCodingCompleteLinux/Source/GCC4/EventManager/EventManager.cpp

//========================================================================
// EventManager.cpp : implements a multi-listener multi-sender event system
//
// Part of the GameCode4 Application
//
// GameCode4 is the sample application that encapsulates much of the source code
// discussed in "Game Coding Complete - 4th Edition" by Mike McShaffry and David
// "Rez" Graham, published by Charles River Media. 
// ISBN-10: 1133776574 | ISBN-13: 978-1133776574
//
// If this source code has found it's way to you, and you think it has helped you
// in any way, do the authors a favor and buy a new copy of the book - there are 
// detailed explanations in it that compliment this code well. Buy a copy at Amazon.com
// by clicking here: 
//    http://www.amazon.com/gp/product/1133776574/ref=olp_product_details?ie=UTF8&me=&seller=
//
// There's a companion web site at http://www.mcshaffry.com/GameCode/
// 
// The source code is managed and maintained through Google Code: 
//    http://code.google.com/p/gamecode4/
//
// (c) Copyright 2012 Michael L. McShaffry and David Graham
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser GPL v3
// as published by the Free Software Foundation.
//
// This program 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 
// http://www.gnu.org/licenses/lgpl-3.0.txt for more details.
//
// You should have received a copy of the GNU Lesser GPL v3
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
//========================================================================


#include "../Unix/GameCodeStd.h"
#include "EventManager.h"

static IEventManager* g_pEventMgr = NULL;

//GCC_MEMORY_WATCHER_DEFINITION(IEventData);

IEventManager* IEventManager::Get(void)
{
	GCC_ASSERT(g_pEventMgr);
	return g_pEventMgr;
}

IEventManager::IEventManager(const char* pName, bool setAsGlobal)
{
	if (setAsGlobal)
    {
        if (g_pEventMgr)
        {
            GCC_ERROR("Attempting to create two global event managers! The old one will be destroyed and overwritten with this one.");
            delete g_pEventMgr;
        }

		g_pEventMgr = this;
    }
}

IEventManager::~IEventManager(void)
{
	if (g_pEventMgr == this)
		g_pEventMgr = NULL;
}