/* * 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->n_rb = NULL; f->n_1_rb = NULL; 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); shm_rbuff_destroy(f->n_rb); shm_rbuff_destroy(f->n_1_rb); 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; }