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/*
* Ouroboros - Copyright (C) 2016
*
* The IPC Resource Manager - Flows
*
* 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ouroboros/config.h>
#include "irm_flow.h"
#include <stdlib.h>
#include <stdbool.h>
struct irm_flow * irm_flow_create()
{
struct irm_flow * f = malloc(sizeof(*f));
if (f == NULL)
return NULL;
f->n_api = -1;
f->n_1_api = -1;
f->port_id = -1;
f->state = FLOW_NULL;
if (pthread_cond_init(&f->state_cond, NULL)) {
free(f);
return NULL;
}
if (pthread_mutex_init(&f->state_lock, NULL)) {
free(f);
return NULL;
}
f->t0.tv_sec = 0;
f->t0.tv_nsec = 0;
return f;
}
void irm_flow_destroy(struct irm_flow * f)
{
pthread_mutex_lock(&f->state_lock);
if (f->state == FLOW_DESTROY) {
pthread_mutex_unlock(&f->state_lock);
return;
}
if (f->state == FLOW_ALLOC_PENDING)
f->state = FLOW_DESTROY;
else
f->state = FLOW_NULL;
pthread_cond_signal(&f->state_cond);
while (f->state != FLOW_NULL)
pthread_cond_wait(&f->state_cond, &f->state_lock);
pthread_mutex_unlock(&f->state_lock);
pthread_cond_destroy(&f->state_cond);
pthread_mutex_destroy(&f->state_lock);
free(f);
}
enum flow_state irm_flow_get_state(struct irm_flow * f)
{
enum flow_state state;
pthread_mutex_lock(&f->state_lock);
state = f->state;
pthread_mutex_unlock(&f->state_lock);
return state;
}
void irm_flow_set_state(struct irm_flow * f, enum flow_state state)
{
pthread_mutex_lock(&f->state_lock);
f->state = state;
pthread_cond_broadcast(&f->state_cond);
pthread_mutex_unlock(&f->state_lock);
}
enum flow_state irm_flow_wait_state(struct irm_flow * f, enum flow_state state)
{
pthread_mutex_lock(&f->state_lock);
while (!(f->state == state || f->state == FLOW_DESTROY))
pthread_cond_wait(&f->state_cond, &f->state_lock);
if (state == FLOW_DESTROY) {
f->state = FLOW_NULL;
pthread_cond_broadcast(&f->state_cond);
}
state = f->state;
pthread_mutex_unlock(&f->state_lock);
return state;
}
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