dolphin/Source/Plugins/Plugin_DSP_NULL/Src/MailHandler.cpp

// Copyright (C) 2003-2008 Dolphin Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.

// 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 the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#include "MailHandler.h"

CMailHandler::CMailHandler()
{

}

CMailHandler::~CMailHandler()
{
	Clear();
}

void CMailHandler::PushMail(u32 _Mail)
{
	m_Mails.push(_Mail);

	Update();
}

u16 CMailHandler::ReadDSPMailboxHigh()
{
	// check if we have a mail for the core
	if (!m_Mails.empty())
	{
		u16 result = (m_Mails.front() >> 16) & 0xFFFF;
		Update();
		return result;
	}

	return 0x00;
}

u16 CMailHandler::ReadDSPMailboxLow()
{
	// check if we have a mail for the core
	if (!m_Mails.empty())
	{
		u16 result = m_Mails.front() & 0xFFFF;
		m_Mails.pop();

		Update();

		return(result);
	}

	return 0x00;
}

void CMailHandler::Clear()
{
	while (!m_Mails.empty())
		m_Mails.pop();
}

bool CMailHandler::IsEmpty()
{
	return m_Mails.empty();
}

void CMailHandler::Halt(bool _Halt)
{
	if (_Halt)
	{
		Clear();
		m_Mails.push(0x80544348);
	}

	Update();
}

void CMailHandler::Update()
{
	if (!IsEmpty())
	{
		//       g_dspInitialize.pGenerateDSPInterrupt();
	}
}