/*
 * Ouroboros - Copyright (C) 2016 - 2017
 *
 * CDAP - CDAP request management
 *
 *    Dimitri Staessens <dimitri.staessens@ugent.be>
 *    Sander Vrijders   <sander.vrijders@ugent.be>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * version 2.1 as published by the Free Software Foundation.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., http://www.fsf.org/about/contact/.
 */

#ifndef OUROBOROS_CDAP_REQ_H
#define OUROBOROS_CDAP_REQ_H

#include <ouroboros/cdap.h>
#include <ouroboros/list.h>
#include <ouroboros/utils.h>

#include <pthread.h>

typedef cdap_key_t invoke_id_t;

enum creq_state {
        REQ_NULL = 0,
        REQ_INIT,
        REQ_INIT_PENDING,
        REQ_PENDING,
        REQ_RESPONSE,
        REQ_DONE,
        REQ_DESTROY
};

struct cdap_req {
        struct list_head next;

        int              fd;
        struct timespec  birth;
        cdap_key_t       key;
        invoke_id_t      iid;

        int              response;
        buffer_t         data;

        enum creq_state  state;
        pthread_cond_t   cond;
        pthread_mutex_t  lock;
};

struct cdap_req * cdap_req_create(int         fd,
                                  cdap_key_t  key,
                                  invoke_id_t iid);

void              cdap_req_destroy(struct cdap_req * creq);

int               cdap_req_wait(struct cdap_req * creq);

void              cdap_req_respond(struct cdap_req * creq,
                                   int               response,
                                   buffer_t          data);

void              cdap_req_cancel(struct cdap_req * creq);

#endif /* OUROBOROS_CDAP_REQ_H */