1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/drivers/io_glib.c	Tue Feb 07 14:27:13 2012 +1000
     1.3 @@ -0,0 +1,85 @@
     1.4 +/**
     1.5 + * $Id$
     1.6 + *
     1.7 + * Glib-based networking support functions. Currently this is just for activity callbacks.
     1.8 + *
     1.9 + * Copyright (c) 2009 Nathan Keynes.
    1.10 + *
    1.11 + * This program is free software; you can redistribute it and/or modify
    1.12 + * it under the terms of the GNU General Public License as published by
    1.13 + * the Free Software Foundation; either version 2 of the License, or
    1.14 + * (at your option) any later version.
    1.15 + *
    1.16 + * This program is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.19 + * GNU General Public License for more details.
    1.20 + */
    1.21 +
    1.22 +#include <assert.h>
    1.23 +#include <glib.h>
    1.24 +#include <stdlib.h>
    1.25 +#include "ioutil.h"
    1.26 +
    1.27 +struct io_glib_cbinfo {
    1.28 +    io_callback_t callback;
    1.29 +    guint sourceid;
    1.30 +    void * cbdata;
    1.31 +    void (*cbdealloc)(void *);
    1.32 +};
    1.33 +
    1.34 +static gboolean io_glib_callback( GIOChannel *source, GIOCondition cond, gpointer data )
    1.35 +{
    1.36 +    struct io_glib_cbinfo *cbinfo = (struct io_glib_cbinfo *)data;
    1.37 +    return cbinfo->callback( g_io_channel_unix_get_fd(source), cbinfo->cbdata);
    1.38 +}
    1.39 +
    1.40 +static void io_glib_release( void *data )
    1.41 +{
    1.42 +    struct io_glib_cbinfo *cbinfo = (struct io_glib_cbinfo *)data;
    1.43 +    if( cbinfo->cbdealloc ) {
    1.44 +        cbinfo->cbdealloc( cbinfo->cbdata );
    1.45 +    }
    1.46 +    free(cbinfo);
    1.47 +}
    1.48 +
    1.49 +/**
    1.50 + * Register a TCP server socket listener on an already open (and listening) 
    1.51 + * socket. The socket must not have been previously registered.
    1.52 + * @return TRUE on success, FALSE on failure.
    1.53 + * 
    1.54 + * Defined in netutil.h
    1.55 + */ 
    1.56 +io_listener_t io_register_tcp_listener( int fd, io_callback_t callback, void *data, void (*dealloc)(void*) )
    1.57 +{
    1.58 +    return io_register_listener( fd, callback, data, dealloc );
    1.59 +}
    1.60 +
    1.61 +io_listener_t io_register_listener( int fd, io_callback_t callback, void *data, void (*dealloc)(void *) )
    1.62 +{
    1.63 +    struct io_glib_cbinfo *cbinfo = malloc( sizeof(struct io_glib_cbinfo) );
    1.64 +    assert(cbinfo != NULL);
    1.65 +    
    1.66 +    cbinfo->callback = callback;
    1.67 +    cbinfo->cbdata = data;
    1.68 +    cbinfo->cbdealloc = dealloc;
    1.69 +
    1.70 +    /**
    1.71 +     * Note magic here: the watch creates an event source which holds a 
    1.72 +     * reference to the channel. We unref the channel so that the channel then
    1.73 +     * is automatically released when the event source goes away.
    1.74 +     */
    1.75 +    GIOChannel *chan = g_io_channel_unix_new(fd);
    1.76 +    g_io_channel_set_encoding( chan, NULL, NULL );
    1.77 +    g_io_channel_set_buffered(chan, FALSE);
    1.78 +    cbinfo->sourceid = g_io_add_watch_full( chan, 0, G_IO_IN, io_glib_callback, cbinfo, io_glib_release );
    1.79 +    g_io_channel_unref( chan );
    1.80 +    return cbinfo;
    1.81 +}
    1.82 +
    1.83 +
    1.84 +void io_unregister_listener( io_listener_t data )
    1.85 +{
    1.86 +    struct io_glib_cbinfo *cbinfo = (struct io_glib_cbinfo *)data;
    1.87 +    g_source_remove(cbinfo->sourceid);
    1.88 +}