/*
 *	PROGRAM:	JRD Access Method
 *	MODULE:		isc_i_proto.h
 *	DESCRIPTION:	Prototype header file for isc_ipc.c
 *
 * The contents of this file are subject to the Interbase Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy
 * of the License at http://www.Inprise.com/IPL.html
 *
 * Software distributed under the License is distributed on an
 * "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
 * or implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code was created by Inprise Corporation
 * and its predecessors. Portions created by Inprise Corporation are
 * Copyright (C) Inprise Corporation.
 *
 * All Rights Reserved.
 * Contributor(s): ______________________________________.
 */

#ifndef JRD_ISC_I_PROTO_H
#define JRD_ISC_I_PROTO_H

// This will install FP overflow signal handler
void	ISC_enter(void);
void	ISC_exit(void);

#ifdef WIN_NT
// This will poke event
int		ISC_kill(SLONG, SLONG, void *);
#else
// And that are functions to manage UNIX signals
int		ISC_kill(SLONG, SLONG);
bool	ISC_signal(int, FPTR_VOID_PTR, void *);
void	ISC_signal_cancel(int, FPTR_VOID_PTR, void *);
#endif

void	ISC_signal_init(void);


class SignalInhibit
//
// This class inhibits signals' processing during I/O 
// activity and re-enables it afterwards.
//
{
public:
#ifndef WIN_NT
	// Constructor inhibits processing of signals.  
	// Signals will be retained until signals are 
	// eventually re-enabled, then re-posted.
    SignalInhibit() throw();
	// Destructor enables signal processing
	// and re-posts any pending signals.
    ~SignalInhibit() throw()
	{
	    enable();
	}
	// Let one re-enable signals in advance
	void enable() throw();
#else
	// Just stubs
    SignalInhibit() throw() { }
    ~SignalInhibit() throw() { }
	void enable() throw() { }
#endif
private:
	// Forbid copy constructor
	SignalInhibit(const SignalInhibit&);
#ifndef WIN_NT
	bool enabled;
#endif
};

#endif /* JRD_ISC_I_PROTO_H */