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/*
* Ouroboros - Copyright (C) 2016
*
* CDAP - CDAP request management
*
* Sander Vrijders <sander.vrijders@intec.ugent.be>
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ouroboros/config.h>
#include <ouroboros/time_utils.h>
#include <ouroboros/errno.h>
#include "cdap_req.h"
#include <stdlib.h>
#include <assert.h>
struct cdap_req * cdap_req_create(cdap_key_t key)
{
struct cdap_req * creq = malloc(sizeof(*creq));
pthread_condattr_t cattr;
if (creq == NULL)
return NULL;
creq->key = key;
creq->state = REQ_INIT;
creq->response = -1;
creq->data.data = NULL;
creq->data.len = 0;
pthread_condattr_init(&cattr);
#ifndef __APPLE__
pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
#endif
pthread_cond_init(&creq->cond, &cattr);
pthread_mutex_init(&creq->lock, NULL);
list_head_init(&creq->next);
clock_gettime(PTHREAD_COND_CLOCK, &creq->birth);
return creq;
}
void cdap_req_destroy(struct cdap_req * creq)
{
assert(creq);
pthread_mutex_lock(&creq->lock);
if (creq->state == REQ_DESTROY) {
pthread_mutex_unlock(&creq->lock);
return;
}
if (creq->state == REQ_INIT)
creq->state = REQ_NULL;
if (creq->state == REQ_PENDING) {
creq->state = REQ_DESTROY;
pthread_cond_broadcast(&creq->cond);
}
while (creq->state != REQ_NULL)
pthread_cond_wait(&creq->cond, &creq->lock);
pthread_mutex_unlock(&creq->lock);
pthread_cond_destroy(&creq->cond);
pthread_mutex_destroy(&creq->lock);
free(creq);
}
int cdap_req_wait(struct cdap_req * creq)
{
struct timespec timeout = {(CDAP_REPLY_TIMEOUT / 1000),
(CDAP_REPLY_TIMEOUT % 1000) * MILLION};
struct timespec abstime;
int ret = -1;
assert(creq);
ts_add(&creq->birth, &timeout, &abstime);
pthread_mutex_lock(&creq->lock);
if (creq->state != REQ_INIT) {
pthread_mutex_unlock(&creq->lock);
return -EINVAL;
}
creq->state = REQ_PENDING;
while (creq->state == REQ_PENDING) {
ret = -pthread_cond_timedwait(&creq->cond,
&creq->lock,
&abstime);
if (ret == -ETIMEDOUT)
break;
}
if (creq->state == REQ_DESTROY) {
ret = -1;
creq->state = REQ_NULL;
pthread_cond_broadcast(&creq->cond);
} else {
creq->state = REQ_DONE;
pthread_cond_broadcast(&creq->cond);
}
pthread_mutex_unlock(&creq->lock);
return ret;
}
void cdap_req_respond(struct cdap_req * creq, int response, buffer_t data)
{
assert(creq);
pthread_mutex_lock(&creq->lock);
if (creq->state != REQ_PENDING) {
pthread_mutex_unlock(&creq->lock);
return;
}
creq->state = REQ_RESPONSE;
creq->response = response;
creq->data = data;
pthread_cond_broadcast(&creq->cond);
while (creq->state == REQ_RESPONSE)
pthread_cond_wait(&creq->cond, &creq->lock);
creq->state = REQ_NULL;
pthread_cond_broadcast(&creq->cond);
pthread_mutex_unlock(&creq->lock);
}
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