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/*
 *	Ivy, C interface
 *
 *	Copyright (C) 1997-2000
 *	Centre d'Études de la Navigation Aérienne
 *
 * 	Main loop based on the Gtk Toolkit
 *
 *	Authors: François-Régis Colin <fcolin@cena.fr>
 *
 *	$Id$
 * 
 *	Please refer to file version.h for the
 *	copyright notice regarding this software
 */

#ifdef WIN32
#include <windows.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#else
#include <signal.h>
#endif

#include <glib.h>

#include "ivyglibloop.h"

struct _channel {
	guint id_read;
	guint id_delete;
	gpointer data;
	ChannelHandleDelete handle_delete;
	ChannelHandleRead handle_read;
	};

static int channel_initialized = 0;

ChannelInit channel_init = IvyGlibChannelInit;
ChannelSetUp channel_setup = IvyGlibChannelSetUp;
ChannelClose channel_close = IvyGlibChannelClose;

static gboolean IvyGlibHandleChannelRead(GIOChannel *source,
					 GIOCondition condition,
					 gpointer data);

static gboolean IvyGlibHandleChannelDelete(GIOChannel *source,
					 GIOCondition condition,
					   gpointer data);


void IvyGlibChannelInit(void) {
  if ( channel_initialized ) return;
  /* fixes bug when another app coredumps */
#ifndef WIN32
  signal( SIGPIPE, SIG_IGN);
#endif
  channel_initialized = 1;
}



Channel IvyGlibChannelSetUp(HANDLE fd, void *data,
			   ChannelHandleDelete handle_delete,
			   ChannelHandleRead handle_read
			   ) {
  Channel channel;
  channel = (Channel)g_new(struct _channel, 1);

  channel->handle_delete = handle_delete;
  channel->handle_read = handle_read;
  channel->data = data;

  {
    GIOChannel* io_channel = g_io_channel_unix_new(fd);

    channel->id_read = g_io_add_watch( io_channel, G_IO_IN, 
				       IvyGlibHandleChannelRead, channel);
    channel->id_delete = g_io_add_watch( io_channel, G_IO_ERR | G_IO_HUP, 
					 IvyGlibHandleChannelDelete, channel);
  }
  return channel;
}




void IvyGlibChannelClose( Channel channel ) {
  if ( channel->handle_delete )
    (*channel->handle_delete)( channel->data );
  g_source_remove( channel->id_read );
  g_source_remove( channel->id_delete );
}
 

static gboolean IvyGlibHandleChannelRead(GIOChannel *source,
					 GIOCondition condition,
					 gpointer data) {
  Channel channel = (Channel)data;
#ifdef DEBUG
  printf("Handle Channel read %d\n",source );
#endif
  (*channel->handle_read)(channel, g_io_channel_unix_get_fd(source), channel->data);
  return TRUE;
}

static gboolean IvyGlibHandleChannelDelete(GIOChannel *source,
					 GIOCondition condition,
					 gpointer data) {
  Channel channel = (Channel)data;
#ifdef DEBUG
  printf("Handle Channel delete %d\n",source );
#endif
  (*channel->handle_delete)(channel->data);
  return TRUE;
}


void
IvyStop ()
{
  /* To be implemented */
}