dsp.cpp

multi-line Adjunct Communication Server

// Copyright (C) 1999-2000 Open Source Telecom Corporation.
//  
// 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; either version 2 of the License, or
// (at your option) any later version.
// 
// 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 for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software 
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// As a special exception to the GNU General Public License, permission is
// granted for additional uses of the text contained in its release
// of ACS as noted here.
//
// This exception is that permission is hereby granted to link ACS with
// the Pika MonteCarlo static libraries to produce a executable image
// without requiring MonteCarlo itself to be supplied in source form so
// long as each source file so linked contains this exclusion.
//
// This exception does not however invalidate any other reasons why
// the resulting executable file might be covered by the GNU General
// public license or invalidate the licensing requirements of any
// other component or library.
//
// This exception applies only to the code released by OST under the
// name ACS.  If you copy code from other releases into a copy of
// ACS, as the General Public License permits, the exception does not
// apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own to ACS, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice, at which
// point the terms of your modification would be covered under the GPL
// as explicitly stated in "COPYING".

#include <config.h>
#include "server.h"
#include "pika.h"

DSPDevice *DSPDevice::first = NULL;
DSPDevice *DSPDevice::last = NULL;

DSPDevice::DSPDevice()
{
	if(!first)
	{
		card = PKCard::first;
		last = first = this;
	}
	else
	{
		card = last->card;
		last->next = this;
		last = this;
	}
	next = NULL;

	while(card->dspused >= card->dspcount)
	{
		card = card->next;
		if(!card)
			throw(this);
	}

	id = card->id;
	dsp = card->dspused++;
	hDsp = PK_DSP_GetDeviceHandle(id, dsp);
	if(!hDsp)
		throw(this);
	if(!dsp)
		card->dspdevice = this;
}

DSPDevice::~DSPDevice()
{
	if(!dsp)
		PK_DSP_StopDriver(id);

//	PK_DSP_ReleasePort(hDsp);
}

TResourceHandle getDspResource(PK_WORD tag, DSPDevice *dsp)
{
	TResourceHandle hRes;

	while(dsp)
	{
		hRes = PK_DSP_SeizePort(dsp->hDsp, tag);
		if(hRes)
			break;

		dsp = dsp->next;
	}
	return hRes;
}