/*
 * This file is part of QCluster.
 *
 * QCluster 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.
 *
 * QCluster 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 QCluster; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Peter Harper <peter.harper@open-msg.com>
 *
 * $Id: message.h,v 1.1 2003/12/02 06:17:38 rmello Exp $
 */

#include "ns.h"
#include "cluster.h"

#ifndef _MESSAGE_H
#define _MESSAGE_H

extern struct q_message_type * q_register_msg_type(
                       int msg_type_id, char *msg_type_name,
                       int (*construct_in_func)(void *, int, void *, int *),
                       int (*construct_out_func)(void *, int, void *, int *));
extern void q_set_can_process_p(struct q_group *group_ptr, int can_process_p);
extern void q_remote_set_can_process_val(struct q_server *remote_server_ptr,
                                struct q_group *group_ptr, int can_process_p);

extern struct q_group *q_get_group_ptr(struct q_server *server_ptr,
                                       char  *group_name);
extern struct q_message_type *q_get_msg_type_ptr(int msg_type_id);
extern int    q_queue_msg(struct q_message_type *msg_type_ptr,
                          struct q_group *group_ptr,
                          char * msg_id, int msg_status,
                          void *msg_buf, int msg_size,
                          int cur_hops);
extern int    q_msg_status_update(char *msg_id, struct q_group *group_ptr,
                                  int new_status);
struct q_message *q_get_msg_and_set_status(struct q_group *group_ptr,
                                           int    cur_status,
                                           int    old_status);

/*
 * Functions used for internal qcluster use.  These functions are used
 * by the cluster communications functions in clustercomms file.
 */
extern int q_remote_queue_msg(struct q_message_type *msg_type_ptr,
                              struct q_group *group_ptr,
                              char * msg_id, int msg_status,
                              void *msg_buf, int msg_size);
extern int q_recover_msg(struct q_server *failed_server_ptr,
                         struct q_message *msg_ptr);
extern int q_remote_msg_status_update(char *msg_id, struct q_group *group_ptr,
                                      int   new_status);

extern Ns_RWLock     g_msg_types_mutex;
extern Tcl_HashTable g_msg_types;

#endif