client_event.c

/*
 * Copyright (C) 2010 Bjoern Biesenbach <bjoern@bjoern-b.de> (minor changes)
 * Copyright (C) 2003-2010 The Music Player Daemon Project
 * http://www.musicpd.org
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "client_internal.h"
#include "command.h"

#include <assert.h>

static gboolean
client_out_event(G_GNUC_UNUSED GIOChannel *source, GIOCondition condition,
         gpointer data)
{
    struct client *client = data;

    assert(!client_is_expired(client));

    if (condition != G_IO_OUT) {
        client_set_expired(client);
        return false;
    }

    client_write_deferred(client);

    if (client_is_expired(client)) {
        client_close(client);
        return false;
    }

    g_timer_start(client->last_activity);

    if (g_queue_is_empty(client->deferred_send)) {
        /* done sending deferred buffers exist: schedule
           read */
        client->source_id = g_io_add_watch(client->channel,
                           G_IO_IN|G_IO_ERR|G_IO_HUP,
                           client_in_event, client);
        return false;
    }

    /* write more */
    return true;
}

gboolean
client_in_event(G_GNUC_UNUSED GIOChannel *source, GIOCondition condition,
        gpointer data)
{
    struct client *client = data;
    enum command_return ret;

    assert(!client_is_expired(client));

    if (condition != G_IO_IN) {
        client_set_expired(client);
        return false;
    }

    g_timer_start(client->last_activity);

    ret = client_read(client);
    switch (ret) {
    case COMMAND_RETURN_OK:
    case COMMAND_RETURN_ERROR:
        break;

    case COMMAND_RETURN_KILL:
        client_close(client);
        //g_main_loop_quit(main_loop);
        return false;

    case COMMAND_RETURN_CLOSE:
        client_close(client);
        return false;
    }

    if (client_is_expired(client)) {
        client_close(client);
        return false;
    }

    if (!g_queue_is_empty(client->deferred_send)) {
        /* deferred buffers exist: schedule write */
        client->source_id = g_io_add_watch(client->channel,
                           G_IO_OUT|G_IO_ERR|G_IO_HUP,
                           client_out_event, client);
        return false;
    }

    /* read more */
    return true;
}