/******************************************************************************* Eurecom OpenAirInterface Copyright(c) 1999 - 2012 Eurecom This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, version 2, as published by the Free Software Foundation. This program is distributed in the hope 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., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. The full GNU General Public License is included in this distribution in the file called "COPYING". Contact Information Openair Admin: openair_admin@eurecom.fr Openair Tech : openair_tech@eurecom.fr Forums : http://forums.eurecom.fr/openairinterface Address : EURECOM, Campus SophiaTech, 450 Route des Chappes 06410 Biot FRANCE *******************************************************************************/ #include #include #include #include #include #include #include #include #include "assertions.h" #include "intertask_interface.h" #include "timer.h" #include "log.h" #include "queue.h" #if defined (LOG_D) && defined (LOG_E) # define TMR_DEBUG(x, args...) LOG_D(TMR, x, ##args) # define TMR_ERROR(x, args...) LOG_E(TMR, x, ##args) #endif #ifndef TMR_DEBUG # define TMR_DEBUG(x, args...) do { fprintf(stdout, "[TMR][D]"x, ##args); } while(0) #endif #ifndef TMR_ERROR # define TMR_ERROR(x, args...) do { fprintf(stdout, "[TMR][E]"x, ##args); } while(0) #endif int timer_handle_signal(siginfo_t *info); struct timer_elm_s { task_id_t task_id; ///< Task ID which has requested the timer int32_t instance; ///< Instance of the task which has requested the timer timer_t timer; ///< Unique timer id timer_type_t type; ///< Timer type void *timer_arg; ///< Optional argument that will be passed when timer expires STAILQ_ENTRY(timer_elm_s) entries; ///< Pointer to next element }; typedef struct timer_desc_s { STAILQ_HEAD(timer_list_head, timer_elm_s) timer_queue; pthread_mutex_t timer_list_mutex; struct timespec timeout; } timer_desc_t; static timer_desc_t timer_desc; #define TIMER_SEARCH(vAR, tIMERfIELD, tIMERvALUE, tIMERqUEUE) \ do { \ STAILQ_FOREACH(vAR, tIMERqUEUE, entries) { \ if (((vAR)->tIMERfIELD == tIMERvALUE)) \ break; \ } \ } while(0) int timer_handle_signal(siginfo_t *info) { #if !defined(RTAI) struct timer_elm_s *timer_p; MessageDef *message_p; timer_has_expired_t *timer_expired_p; task_id_t task_id; int32_t instance; /* Get back pointer to timer list element */ timer_p = (struct timer_elm_s *)info->si_ptr; TMR_DEBUG("Timer with id 0x%lx has expired\n", (long)timer_p->timer); task_id = timer_p->task_id; instance = timer_p->instance; message_p = itti_alloc_new_message(TASK_TIMER, TIMER_HAS_EXPIRED); timer_expired_p = &message_p->ittiMsg.timer_has_expired; timer_expired_p->timer_id = (long)timer_p->timer; timer_expired_p->arg = timer_p->timer_arg; /* Timer is a one shot timer, remove it */ if (timer_p->type == TIMER_ONE_SHOT) { // if (timer_delete(timer_p->timer) < 0) { // TMR_DEBUG("Failed to delete timer 0x%lx\n", (long)timer_p->timer); // } // TMR_DEBUG("Removed timer 0x%lx\n", (long)timer_p->timer); // pthread_mutex_lock(&timer_desc.timer_list_mutex); // STAILQ_REMOVE(&timer_desc.timer_queue, timer_p, timer_elm_s, entries); // pthread_mutex_unlock(&timer_desc.timer_list_mutex); // free(timer_p); // timer_p = NULL; if (timer_remove((long)timer_p->timer) != 0) { TMR_DEBUG("Failed to delete timer 0x%lx\n", (long)timer_p->timer); } } /* Notify task of timer expiry */ if (itti_send_msg_to_task(task_id, instance, message_p) < 0) { TMR_DEBUG("Failed to send msg TIMER_HAS_EXPIRED to task %u\n", task_id); free(message_p); return -1; } #endif return 0; } int timer_setup( uint32_t interval_sec, uint32_t interval_us, task_id_t task_id, int32_t instance, timer_type_t type, void *timer_arg, long *timer_id) { #if !defined(RTAI) struct sigevent se; struct itimerspec its; struct timer_elm_s *timer_p; timer_t timer; if (timer_id == NULL) { return -1; } DevAssert(type < TIMER_TYPE_MAX); /* Allocate new timer list element */ timer_p = malloc(sizeof(struct timer_elm_s)); if (timer_p == NULL) { TMR_ERROR("Failed to create new timer element\n"); return -1; } memset(&timer, 0, sizeof(timer_t)); memset(&se, 0, sizeof(struct sigevent)); timer_p->task_id = task_id; timer_p->instance = instance; timer_p->type = type; timer_p->timer_arg = timer_arg; /* Setting up alarm */ /* Set and enable alarm */ se.sigev_notify = SIGEV_SIGNAL; se.sigev_signo = SIGTIMER; se.sigev_value.sival_ptr = timer_p; /* At the timer creation, the timer structure will be filled in with timer_id, * which is unique for this process. This id is allocated by kernel and the * value might be used to distinguish timers. */ if (timer_create(CLOCK_REALTIME, &se, &timer) < 0) { TMR_ERROR("Failed to create timer: (%s:%d)\n", strerror(errno), errno); free(timer_p); return -1; } /* Fill in the first expiration value. */ its.it_value.tv_sec = interval_sec; its.it_value.tv_nsec = interval_us * 1000; if (type == TIMER_PERIODIC) { /* Asked for periodic timer. We set the interval time */ its.it_interval.tv_sec = interval_sec; its.it_interval.tv_nsec = interval_us * 1000; } else { /* Asked for one-shot timer. Do not set the interval field */ its.it_interval.tv_sec = 0; its.it_interval.tv_nsec = 0; } timer_settime(timer, 0, &its, NULL); /* Simply set the timer_id argument. so it can be used by caller */ *timer_id = (long)timer; TMR_DEBUG("Requesting new %s timer with id 0x%lx that expires within " "%d sec and %d usec\n", type == TIMER_PERIODIC ? "periodic" : "single shot", *timer_id, interval_sec, interval_us); timer_p->timer = timer; /* Lock the queue and insert the timer at the tail */ pthread_mutex_lock(&timer_desc.timer_list_mutex); STAILQ_INSERT_TAIL(&timer_desc.timer_queue, timer_p, entries); pthread_mutex_unlock(&timer_desc.timer_list_mutex); #else return -1; #endif return 0; } int timer_remove(long timer_id) { int rc = 0; #if !defined(RTAI) struct timer_elm_s *timer_p; TMR_DEBUG("Removing timer 0x%lx\n", timer_id); pthread_mutex_lock(&timer_desc.timer_list_mutex); TIMER_SEARCH(timer_p, timer, ((timer_t)timer_id), &timer_desc.timer_queue); /* We didn't find the timer in list */ if (timer_p == NULL) { pthread_mutex_unlock(&timer_desc.timer_list_mutex); TMR_ERROR("Didn't find timer 0x%lx in list\n", (long)timer_p->timer); return -1; } STAILQ_REMOVE(&timer_desc.timer_queue, timer_p, timer_elm_s, entries); pthread_mutex_unlock(&timer_desc.timer_list_mutex); if (timer_delete(timer_p->timer) < 0) { TMR_ERROR("Failed to delete timer 0x%lx\n", (long)timer_p->timer); rc = -1; } free(timer_p); timer_p = NULL; #endif return rc; } int timer_init(void) { TMR_DEBUG("Initializing TIMER task interface\n"); memset(&timer_desc, 0, sizeof(timer_desc_t)); STAILQ_INIT(&timer_desc.timer_queue); pthread_mutex_init(&timer_desc.timer_list_mutex, NULL); TMR_DEBUG("Initializing TIMER task interface: DONE\n"); return 0; }