/* * Ouroboros - Copyright (C) 2016 - 2017 * * The IPC Resource Manager - Application Instance Table * * 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/list.h> #include <ouroboros/errno.h> #include <ouroboros/time_utils.h> #include "api_table.h" #include "registry.h" #include <stdlib.h> #include <unistd.h> #include <limits.h> struct api_entry * api_entry_create(pid_t api, char * apn) { struct api_entry * e; if (apn == NULL) return NULL; e = malloc(sizeof(*e)); if (e == NULL) return NULL; list_head_init(&e->next); list_head_init(&e->names); e->api = api; e->apn = apn; e->daf_name = NULL; e->re = NULL; e->state = API_INIT; pthread_mutex_init(&e->state_lock, NULL); pthread_cond_init(&e->state_cond, NULL); return e; } void api_entry_destroy(struct api_entry * e) { struct list_head * p; struct list_head * h; if (e == NULL) return; pthread_mutex_lock(&e->state_lock); if (e->state == API_DESTROY) { pthread_mutex_unlock(&e->state_lock); return; } if (e->state == API_SLEEP) e->state = API_DESTROY; pthread_cond_signal(&e->state_cond); while (e->state != API_INIT) pthread_cond_wait(&e->state_cond, &e->state_lock); pthread_mutex_unlock(&e->state_lock); pthread_cond_destroy(&e->state_cond); pthread_mutex_destroy(&e->state_lock); if (e->apn != NULL) free(e->apn); list_for_each_safe(p, h, &e->names) { struct str_el * n = list_entry(p, struct str_el, next); list_del(&n->next); if (n->str != NULL) free(n->str); free(n); } free(e); } int api_entry_add_name(struct api_entry * e, char * name) { struct str_el * s; if (e == NULL || name == NULL) return -EINVAL; s = malloc(sizeof(*s)); if (s == NULL) return -ENOMEM; s->str = name; list_add(&s->next, &e->names); return 0; } void api_entry_del_name(struct api_entry * e, char * name) { struct list_head * p = NULL; struct list_head * h = NULL; list_for_each_safe(p, h, &e->names) { struct str_el * s = list_entry(p, struct str_el, next); if (!wildcard_match(name, s->str)) { list_del(&s->next); if (s->str != NULL) free(s->str); free(s); } } } int api_entry_sleep(struct api_entry * e) { struct timespec timeout = {(IRMD_ACCEPT_TIMEOUT / 1000), (IRMD_ACCEPT_TIMEOUT % 1000) * MILLION}; struct timespec now; struct timespec dl; int ret = 0; if (e == NULL) return -EINVAL; e->re = NULL; clock_gettime(CLOCK_REALTIME, &now); ts_add(&now, &timeout, &dl); pthread_mutex_lock(&e->state_lock); if (e->state != API_INIT) { pthread_mutex_unlock(&e->state_lock); return -EINVAL; } e->state = API_SLEEP; while (e->state == API_SLEEP) { if ((ret = -pthread_cond_timedwait(&e->state_cond, &e->state_lock, &dl)) == -ETIMEDOUT) { break; } } if (e->state == API_DESTROY) ret = -1; e->state = API_INIT; pthread_cond_broadcast(&e->state_cond); pthread_mutex_unlock(&e->state_lock); return ret; } void api_entry_wake(struct api_entry * e, struct reg_entry * re) { if (e == NULL) return; pthread_mutex_lock(&e->state_lock); if (e->state != API_SLEEP) { pthread_mutex_unlock(&e->state_lock); return; } e->state = API_WAKE; e->re = re; pthread_cond_broadcast(&e->state_cond); while (e->state == API_WAKE) pthread_cond_wait(&e->state_cond, &e->state_lock); pthread_mutex_unlock(&e->state_lock); } int api_table_add(struct list_head * api_table, struct api_entry * e) { if (api_table == NULL || e == NULL) return -EINVAL; list_add(&e->next, api_table); return 0; } void api_table_del(struct list_head * api_table, pid_t api) { struct list_head * p; struct list_head * h; list_for_each_safe(p, h, api_table) { struct api_entry * e = list_entry(p, struct api_entry, next); if (api == e->api) { list_del(&e->next); api_entry_destroy(e); } } } struct api_entry * api_table_get(struct list_head * api_table, pid_t api) { struct list_head * h; list_for_each(h, api_table) { struct api_entry * e = list_entry(h, struct api_entry, next); if (api == e->api) return e; } return NULL; }