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/*
* Ivy, C interface
*
* Copyright (C) 1997-2000
* Centre d'Études de la Navigation Aérienne
*
* Main loop based on the X Toolkit
*
* Authors: François-Régis Colin <fcolin@cena.dgac.fr>
* Stéphane Chatty <chatty@cena.dgac.fr>
*
* $Id$
*
* Please refer to file version.h for the
* copyright notice regarding this software
*/
#ifdef WIN32
#include <windows.h>
#endif
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#ifdef WIN32
#else
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <signal.h>
#endif
#include <X11/Intrinsic.h>
#include "ivydebug.h"
#include "ivychannel.h"
#include "ivyxtloop.h"
struct _channel {
XtInputId id_read;
XtInputId id_write;
XtInputId id_delete;
HANDLE fd;
void *data;
ChannelHandleDelete handle_delete;
ChannelHandleRead handle_read;
ChannelHandleWrite handle_write;
};
static int channel_initialized = 0;
static XtAppContext app = NULL;
void IvyChannelInit(void)
{
if ( channel_initialized ) return;
/* pour eviter les plantages quand les autres applis font core-dump */
#ifndef WIN32
signal( SIGPIPE, SIG_IGN);
#endif
/* verifie si init correct */
if ( !app )
{
fprintf( stderr, "You must call IvyXtChannelAppContext before XtMainLoop. Exiting.\n");
exit(-1);
}
channel_initialized = 1;
}
void IvyChannelRemove( Channel channel )
{
if ( channel->handle_delete )
(*channel->handle_delete)( channel->data );
XtRemoveInput( channel->id_read );
XtRemoveInput( channel->id_delete );
}
static void IvyXtHandleChannelRead( XtPointer closure, int* source, XtInputId* id )
{
Channel channel = (Channel)closure;
TRACE("Handle Channel read %d\n",*source );
(*channel->handle_read)(channel,*source,channel->data);
}
static void IvyXtHandleChannelWrite( XtPointer closure, int* source, XtInputId* id )
{
Channel channel = (Channel)closure;
TRACE("Handle Channel write %d\n",*source );
(*channel->handle_write)(channel,*source,channel->data);
}
static void IvyXtHandleChannelDelete( XtPointer closure, int* source, XtInputId* id )
{
Channel channel = (Channel)closure;
TRACE("Handle Channel delete %d\n",*source );
(*channel->handle_delete)(channel->data);
}
void IvyXtChannelAppContext( XtAppContext cntx )
{
app = cntx;
}
Channel IvyChannelAdd(HANDLE fd, void *data,
ChannelHandleDelete handle_delete,
ChannelHandleRead handle_read,
ChannelHandleWrite handle_write
)
{
Channel channel;
channel = XtNew( struct _channel );
if ( !channel )
{
fprintf(stderr,"NOK Memory Alloc Error\n");
exit(0);
}
channel->handle_delete = handle_delete;
channel->handle_read = handle_read;
channel->handle_write = handle_write;
channel->data = data;
channel->fd = fd;
channel->id_read = XtAppAddInput( app, fd, (XtPointer)XtInputReadMask, IvyXtHandleChannelRead, channel);
channel->id_delete = XtAppAddInput( app, fd, (XtPointer)XtInputExceptMask, IvyXtHandleChannelDelete, channel);
return channel;
}
void IvyChannelAddWritableEvent(Channel channel)
{
channel->id_write = XtAppAddInput( app, channel->fd, (XtPointer)XtInputWriteMask, IvyXtHandleChannelWrite, channel);
}
void IvyChannelClearWritableEvent(Channel channel)
{
XtRemoveInput( channel->id_write );
}
void
IvyChannelStop ()
{
/* To be implemented */
}
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