/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
#define _GNU_SOURCE
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
#if !defined(TRUE)
#define TRUE 1
#endif
#include "liblfds611.h"
#include "assertions.h"
#include "intertask_interface.h"
#include "intertask_interface_dump.h"
#if T_TRACER
#include "T.h"
#endif
/* Includes "intertask_interface_init.h" to check prototype coherence, but
* disable threads and messages information generation.
*/
#define CHECK_PROTOTYPE_ONLY
#include "intertask_interface_init.h"
#undef CHECK_PROTOTYPE_ONLY
#include "signals.h"
#include "timer.h"
/* ITTI DEBUG groups */
#define ITTI_DEBUG_POLL (1<<0)
#define ITTI_DEBUG_SEND (1<<1)
#define ITTI_DEBUG_EVEN_FD (1<<2)
#define ITTI_DEBUG_INIT (1<<3)
#define ITTI_DEBUG_EXIT (1<<4)
#define ITTI_DEBUG_ISSUES (1<<5)
#define ITTI_DEBUG_MP_STATISTICS (1<<6)
const int itti_debug = (ITTI_DEBUG_ISSUES | ITTI_DEBUG_MP_STATISTICS);
# define ITTI_DEBUG(m, x, args...) do { if ((m) & itti_debug) {fprintf(stdout, "[ITTI][D]"x, ##args); fflush (stdout);} } while(0);
#define ITTI_ERROR(x, args...) do { fprintf(stdout, "[ITTI][E]"x, ##args); fflush (stdout); } while(0);
/* Global message size */
#define MESSAGE_SIZE(mESSAGEiD) (sizeof(MessageHeader) + itti_desc.messages_info[mESSAGEiD].size)
typedef enum task_state_s {
TASK_STATE_NOT_CONFIGURED, TASK_STATE_STARTING, TASK_STATE_READY, TASK_STATE_ENDED, TASK_STATE_MAX,
} task_state_t;
/* This list acts as a FIFO of messages received by tasks (RRC, NAS, ...) */
typedef struct message_list_s {
MessageDef *msg; ///< Pointer to the message
message_number_t message_number; ///< Unique message number
uint32_t message_priority; ///< Message priority
} message_list_t;
typedef struct thread_desc_s {
/* pthread associated with the thread */
pthread_t task_thread;
/* State of the thread */
volatile task_state_t task_state;
/* This fd is used internally by ITTI. */
int epoll_fd;
/* The thread fd */
int task_event_fd;
/* Number of events to monitor */
uint16_t nb_events;
/* Array of events monitored by the task.
* By default only one fd is monitored (the one used to received messages
* from other tasks).
* More events can be suscribed later by the task itself.
*/
struct epoll_event *events;
int epoll_nb_events;
/* Flag to mark real time thread */
unsigned real_time;
/* Counter to indicate that messages are pending for the thread */
unsigned messages_pending;
} thread_desc_t;
typedef struct task_desc_s {
/* Queue of messages belonging to the task */
struct lfds611_queue_state *message_queue;
} task_desc_t;
typedef struct itti_desc_s {
thread_desc_t *threads;
task_desc_t *tasks;
/* Current message number. Incremented every call to send_msg_to_task */
message_number_t message_number __attribute__((aligned(8)));
thread_id_t thread_max;
task_id_t task_max;
MessagesIds messages_id_max;
boolean_t thread_handling_signals;
pthread_t thread_ref;
const task_info_t *tasks_info;
const message_info_t *messages_info;
itti_lte_time_t lte_time;
int running;
volatile uint32_t created_tasks;
volatile uint32_t ready_tasks;
volatile int wait_tasks;
} itti_desc_t;
static itti_desc_t itti_desc;
void *itti_malloc(task_id_t origin_task_id, task_id_t destination_task_id, ssize_t size)
{
void *ptr = NULL;
ptr = malloc (size);
if (ptr) memset(ptr,0,size);
AssertFatal (ptr != NULL, "Memory allocation of %d bytes failed (%d -> %d)!\n", (int) size, origin_task_id, destination_task_id);
return ptr;
}
int itti_free(task_id_t task_id, void *ptr)
{
int result = EXIT_SUCCESS;
AssertFatal (ptr != NULL, "Trying to free a NULL pointer (%d)!\n", task_id);
free (ptr);
return (result);
}
static inline message_number_t itti_increment_message_number(void)
{
/* Atomic operation supported by GCC: returns the current message number
* and then increment it by 1.
* This can be done without mutex.
*/
return __sync_fetch_and_add (&itti_desc.message_number, 1);
}
static inline uint32_t itti_get_message_priority(MessagesIds message_id)
{
AssertFatal (message_id < itti_desc.messages_id_max, "Message id (%d) is out of range (%d)!\n", message_id, itti_desc.messages_id_max);
return (itti_desc.messages_info[message_id].priority);
}
const char *itti_get_message_name(MessagesIds message_id)
{
AssertFatal (message_id < itti_desc.messages_id_max, "Message id (%d) is out of range (%d)!\n", message_id, itti_desc.messages_id_max);
return (itti_desc.messages_info[message_id].name);
}
const char *itti_get_task_name(task_id_t task_id)
{
if (itti_desc.task_max > 0) {
AssertFatal (task_id < itti_desc.task_max, "Task id (%d) is out of range (%d)!\n", task_id, itti_desc.task_max);
} else {
return ("ITTI NOT INITIALIZED !!!");
}
return (itti_desc.tasks_info[task_id].name);
}
static task_id_t itti_get_current_task_id(void)
{
task_id_t task_id;
thread_id_t thread_id;
pthread_t thread = pthread_self ();
for (task_id = TASK_FIRST; task_id < itti_desc.task_max; task_id++) {
thread_id = TASK_GET_THREAD_ID(task_id);
if (itti_desc.threads[thread_id].task_thread == thread) {
return task_id;
}
}
return TASK_UNKNOWN;
}
void itti_update_lte_time(uint32_t frame, uint8_t slot)
{
itti_desc.lte_time.frame = frame;
itti_desc.lte_time.slot = slot;
}
int itti_send_broadcast_message(MessageDef *message_p)
{
task_id_t destination_task_id;
task_id_t origin_task_id;
thread_id_t origin_thread_id;
uint32_t thread_id;
int ret = 0;
int result;
AssertFatal (message_p != NULL, "Trying to broadcast a NULL message!\n");
origin_task_id = message_p->ittiMsgHeader.originTaskId;
origin_thread_id = TASK_GET_THREAD_ID(origin_task_id);
destination_task_id = TASK_FIRST;
for (thread_id = THREAD_FIRST; thread_id < itti_desc.thread_max; thread_id++) {
MessageDef *new_message_p;
while (thread_id != TASK_GET_THREAD_ID(destination_task_id)) {
destination_task_id++;
}
/* Skip task that broadcast the message */
if (thread_id != origin_thread_id) {
/* Skip tasks which are not running */
if (itti_desc.threads[thread_id].task_state == TASK_STATE_READY) {
size_t size = sizeof(MessageHeader) + message_p->ittiMsgHeader.ittiMsgSize;
new_message_p = itti_malloc( origin_task_id, destination_task_id, size );
AssertFatal (new_message_p != NULL, "New message allocation failed!\n");
memcpy( new_message_p, message_p, size );
result = itti_send_msg_to_task (destination_task_id, INSTANCE_DEFAULT, new_message_p);
AssertFatal (result >= 0, "Failed to send message %d to thread %d (task %d)!\n", message_p->ittiMsgHeader.messageId, thread_id, destination_task_id);
}
}
}
result = itti_free (ITTI_MSG_ORIGIN_ID(message_p), message_p);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
return ret;
}
MessageDef *itti_alloc_new_message_sized(task_id_t origin_task_id, MessagesIds message_id, MessageHeaderSize size)
{
MessageDef *temp = NULL;
AssertFatal (message_id < itti_desc.messages_id_max, "Message id (%d) is out of range (%d)!\n", message_id, itti_desc.messages_id_max);
if (origin_task_id == TASK_UNKNOWN) {
/* Try to identify real origin task ID */
origin_task_id = itti_get_current_task_id();
}
temp = itti_malloc (origin_task_id, TASK_UNKNOWN, sizeof(MessageHeader) + size);
temp->ittiMsgHeader.messageId = message_id;
temp->ittiMsgHeader.originTaskId = origin_task_id;
temp->ittiMsgHeader.ittiMsgSize = size;
return temp;
}
MessageDef *itti_alloc_new_message(task_id_t origin_task_id, MessagesIds message_id)
{
return itti_alloc_new_message_sized(origin_task_id, message_id, itti_desc.messages_info[message_id].size);
}
int itti_send_msg_to_task(task_id_t destination_task_id, instance_t instance, MessageDef *message)
{
thread_id_t destination_thread_id;
task_id_t origin_task_id;
message_list_t *new;
uint32_t priority;
message_number_t message_number;
uint32_t message_id;
AssertFatal (message != NULL, "Message is NULL!\n");
AssertFatal (destination_task_id < itti_desc.task_max, "Destination task id (%d) is out of range (%d)\n", destination_task_id, itti_desc.task_max);
destination_thread_id = TASK_GET_THREAD_ID(destination_task_id);
message->ittiMsgHeader.destinationTaskId = destination_task_id;
message->ittiMsgHeader.instance = instance;
message->ittiMsgHeader.lte_time.frame = itti_desc.lte_time.frame;
message->ittiMsgHeader.lte_time.slot = itti_desc.lte_time.slot;
message_id = message->ittiMsgHeader.messageId;
AssertFatal (message_id < itti_desc.messages_id_max, "Message id (%d) is out of range (%d)!\n", message_id, itti_desc.messages_id_max);
origin_task_id = ITTI_MSG_ORIGIN_ID(message);
priority = itti_get_message_priority (message_id);
/* Increment the global message number */
message_number = itti_increment_message_number ();
#if 0
/* itti dump is disabled */
itti_dump_queue_message (origin_task_id, message_number, message, itti_desc.messages_info[message_id].name,
sizeof(MessageHeader) + message->ittiMsgHeader.ittiMsgSize);
#endif
if (destination_task_id != TASK_UNKNOWN) {
if (itti_desc.threads[destination_thread_id].task_state == TASK_STATE_ENDED) {
ITTI_DEBUG(ITTI_DEBUG_ISSUES, " Message %s, number %lu with priority %d can not be sent from %s to queue (%u:%s), ended destination task!\n",
itti_desc.messages_info[message_id].name,
message_number,
priority,
itti_get_task_name(origin_task_id),
destination_task_id,
itti_get_task_name(destination_task_id));
} else {
/* We cannot send a message if the task is not running */
AssertFatal (itti_desc.threads[destination_thread_id].task_state == TASK_STATE_READY,
"Task %s Cannot send message %s (%d) to thread %d, it is not in ready state (%d)!\n",
itti_get_task_name(origin_task_id),
itti_desc.messages_info[message_id].name,
message_id,
destination_thread_id,
itti_desc.threads[destination_thread_id].task_state);
/* Allocate new list element */
new = (message_list_t *) itti_malloc (origin_task_id, destination_task_id, sizeof(struct message_list_s));
/* Fill in members */
new->msg = message;
new->message_number = message_number;
new->message_priority = priority;
/* Enqueue message in destination task queue */
if (lfds611_queue_enqueue(itti_desc.tasks[destination_task_id].message_queue, new) == 0) {
AssertFatal(0, "Error: lfds611_queue_enqueue returns 0, queue is full, exiting\n");
}
{
/* Only use event fd for tasks, subtasks will pool the queue */
if (TASK_GET_PARENT_TASK_ID(destination_task_id) == TASK_UNKNOWN) {
ssize_t write_ret;
eventfd_t sem_counter = 1;
/* Call to write for an event fd must be of 8 bytes */
write_ret = write (itti_desc.threads[destination_thread_id].task_event_fd, &sem_counter, sizeof(sem_counter));
AssertFatal (write_ret == sizeof(sem_counter), "Write to task message FD (%d) failed (%d/%d)\n",
destination_thread_id, (int) write_ret, (int) sizeof(sem_counter));
}
}
ITTI_DEBUG(ITTI_DEBUG_SEND, " Message %s, number %lu with priority %d successfully sent from %s to queue (%u:%s)\n",
itti_desc.messages_info[message_id].name,
message_number,
priority,
itti_get_task_name(origin_task_id),
destination_task_id,
itti_get_task_name(destination_task_id));
}
} else {
/* This is a debug message to TASK_UNKNOWN, we can release safely release it */
int result = itti_free(origin_task_id, message);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
}
return 0;
}
/* same as itti_send_msg_to_task but returns -1 in case of failure instead of crashing */
/* TODO: this is a hack - the whole logic needs a proper rework. */
/* look for HACK_RLC_UM_LIMIT for others places related to the hack. Please do not remove this comment. */
int itti_try_send_msg_to_task(task_id_t destination_task_id, instance_t instance, MessageDef *message)
{
thread_id_t destination_thread_id;
task_id_t origin_task_id;
message_list_t *new;
uint32_t priority;
message_number_t message_number;
uint32_t message_id;
AssertFatal (message != NULL, "Message is NULL!\n");
AssertFatal (destination_task_id < itti_desc.task_max, "Destination task id (%d) is out of range (%d)\n", destination_task_id, itti_desc.task_max);
destination_thread_id = TASK_GET_THREAD_ID(destination_task_id);
message->ittiMsgHeader.destinationTaskId = destination_task_id;
message->ittiMsgHeader.instance = instance;
message->ittiMsgHeader.lte_time.frame = itti_desc.lte_time.frame;
message->ittiMsgHeader.lte_time.slot = itti_desc.lte_time.slot;
message_id = message->ittiMsgHeader.messageId;
AssertFatal (message_id < itti_desc.messages_id_max, "Message id (%d) is out of range (%d)!\n", message_id, itti_desc.messages_id_max);
origin_task_id = ITTI_MSG_ORIGIN_ID(message);
priority = itti_get_message_priority (message_id);
/* Increment the global message number */
message_number = itti_increment_message_number ();
#if 0
/* itti dump is disabled */
itti_dump_queue_message (origin_task_id, message_number, message, itti_desc.messages_info[message_id].name,
sizeof(MessageHeader) + message->ittiMsgHeader.ittiMsgSize);
#endif
if (destination_task_id != TASK_UNKNOWN) {
if (itti_desc.threads[destination_thread_id].task_state == TASK_STATE_ENDED) {
ITTI_DEBUG(ITTI_DEBUG_ISSUES, " Message %s, number %lu with priority %d can not be sent from %s to queue (%u:%s), ended destination task!\n",
itti_desc.messages_info[message_id].name,
message_number,
priority,
itti_get_task_name(origin_task_id),
destination_task_id,
itti_get_task_name(destination_task_id));
} else {
/* We cannot send a message if the task is not running */
AssertFatal (itti_desc.threads[destination_thread_id].task_state == TASK_STATE_READY,
"Task %s Cannot send message %s (%d) to thread %d, it is not in ready state (%d)!\n",
itti_get_task_name(origin_task_id),
itti_desc.messages_info[message_id].name,
message_id,
destination_thread_id,
itti_desc.threads[destination_thread_id].task_state);
/* Allocate new list element */
new = (message_list_t *) itti_malloc (origin_task_id, destination_task_id, sizeof(struct message_list_s));
/* Fill in members */
new->msg = message;
new->message_number = message_number;
new->message_priority = priority;
/* Enqueue message in destination task queue */
if (lfds611_queue_enqueue(itti_desc.tasks[destination_task_id].message_queue, new) == 0) {
itti_free(origin_task_id, new);
return -1;
}
{
/* Only use event fd for tasks, subtasks will pool the queue */
if (TASK_GET_PARENT_TASK_ID(destination_task_id) == TASK_UNKNOWN) {
ssize_t write_ret;
eventfd_t sem_counter = 1;
/* Call to write for an event fd must be of 8 bytes */
write_ret = write (itti_desc.threads[destination_thread_id].task_event_fd, &sem_counter, sizeof(sem_counter));
AssertFatal (write_ret == sizeof(sem_counter), "Write to task message FD (%d) failed (%d/%d)\n",
destination_thread_id, (int) write_ret, (int) sizeof(sem_counter));
}
}
ITTI_DEBUG(ITTI_DEBUG_SEND, " Message %s, number %lu with priority %d successfully sent from %s to queue (%u:%s)\n",
itti_desc.messages_info[message_id].name,
message_number,
priority,
itti_get_task_name(origin_task_id),
destination_task_id,
itti_get_task_name(destination_task_id));
}
} else {
/* This is a debug message to TASK_UNKNOWN, we can release safely release it */
int result = itti_free(origin_task_id, message);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
}
return 0;
}
void itti_subscribe_event_fd(task_id_t task_id, int fd)
{
thread_id_t thread_id;
struct epoll_event event;
AssertFatal (task_id < itti_desc.task_max, "Task id (%d) is out of range (%d)!\n", task_id, itti_desc.task_max);
thread_id = TASK_GET_THREAD_ID(task_id);
itti_desc.threads[thread_id].nb_events++;
/* Reallocate the events */
itti_desc.threads[thread_id].events = realloc(
itti_desc.threads[thread_id].events,
itti_desc.threads[thread_id].nb_events * sizeof(struct epoll_event));
event.events = EPOLLIN | EPOLLERR;
event.data.u64 = 0;
event.data.fd = fd;
/* Add the event fd to the list of monitored events */
if (epoll_ctl(itti_desc.threads[thread_id].epoll_fd, EPOLL_CTL_ADD, fd,
&event) != 0) {
/* Always assert on this condition */
AssertFatal (0, "epoll_ctl (EPOLL_CTL_ADD) failed for task %s, fd %d: %s!\n",
itti_get_task_name(task_id), fd, strerror(errno));
}
ITTI_DEBUG(ITTI_DEBUG_EVEN_FD, " Successfully subscribed fd %d for task %s\n", fd, itti_get_task_name(task_id));
}
void itti_unsubscribe_event_fd(task_id_t task_id, int fd)
{
thread_id_t thread_id;
AssertFatal (task_id < itti_desc.task_max, "Task id (%d) is out of range (%d)!\n", task_id, itti_desc.task_max);
AssertFatal (fd >= 0, "File descriptor (%d) is invalid!\n", fd);
thread_id = TASK_GET_THREAD_ID(task_id);
/* Add the event fd to the list of monitored events */
if (epoll_ctl(itti_desc.threads[thread_id].epoll_fd, EPOLL_CTL_DEL, fd, NULL) != 0) {
/* Always assert on this condition */
AssertFatal (0, "epoll_ctl (EPOLL_CTL_DEL) failed for task %s, fd %d: %s!\n",
itti_get_task_name(task_id), fd, strerror(errno));
}
itti_desc.threads[thread_id].nb_events--;
itti_desc.threads[thread_id].events = realloc(
itti_desc.threads[thread_id].events,
itti_desc.threads[thread_id].nb_events * sizeof(struct epoll_event));
}
int itti_get_events(task_id_t task_id, struct epoll_event **events)
{
thread_id_t thread_id;
AssertFatal (task_id < itti_desc.task_max, "Task id (%d) is out of range (%d)\n", task_id, itti_desc.task_max);
thread_id = TASK_GET_THREAD_ID(task_id);
*events = itti_desc.threads[thread_id].events;
return itti_desc.threads[thread_id].epoll_nb_events;
}
static inline void itti_receive_msg_internal_event_fd(task_id_t task_id, uint8_t polling, MessageDef **received_msg)
{
thread_id_t thread_id;
int epoll_ret = 0;
int epoll_timeout = 0;
int i;
AssertFatal (task_id < itti_desc.task_max, "Task id (%d) is out of range (%d)!\n", task_id, itti_desc.task_max);
AssertFatal (received_msg != NULL, "Received message is NULL!\n");
thread_id = TASK_GET_THREAD_ID(task_id);
*received_msg = NULL;
if (polling) {
/* In polling mode we set the timeout to 0 causing epoll_wait to return
* immediately.
*/
epoll_timeout = 0;
} else {
/* timeout = -1 causes the epoll_wait to wait indefinitely.
*/
epoll_timeout = -1;
}
do {
epoll_ret = epoll_wait(itti_desc.threads[thread_id].epoll_fd,
itti_desc.threads[thread_id].events,
itti_desc.threads[thread_id].nb_events,
epoll_timeout);
} while (epoll_ret < 0 && errno == EINTR);
if (epoll_ret < 0) {
AssertFatal (0, "epoll_wait failed for task %s: %s!\n", itti_get_task_name(task_id), strerror(errno));
}
if (epoll_ret == 0 && polling) {
/* No data to read -> return */
return;
}
itti_desc.threads[thread_id].epoll_nb_events = epoll_ret;
for (i = 0; i < epoll_ret; i++) {
/* Check if there is an event for ITTI for the event fd */
if ((itti_desc.threads[thread_id].events[i].events & EPOLLIN) &&
(itti_desc.threads[thread_id].events[i].data.fd == itti_desc.threads[thread_id].task_event_fd)) {
struct message_list_s *message = NULL;
eventfd_t sem_counter;
ssize_t read_ret;
int result;
/* Read will always return 1 */
read_ret = read (itti_desc.threads[thread_id].task_event_fd, &sem_counter, sizeof(sem_counter));
AssertFatal (read_ret == sizeof(sem_counter), "Read from task message FD (%d) failed (%d/%d)!\n", thread_id, (int) read_ret, (int) sizeof(sem_counter));
if (lfds611_queue_dequeue (itti_desc.tasks[task_id].message_queue, (void **) &message) == 0) {
/* No element in list -> this should not happen */
AssertFatal (0, "No message in queue for task %d while there are %d events and some for the messages queue!\n", task_id, epoll_ret);
}
AssertFatal(message != NULL, "Message from message queue is NULL!\n");
*received_msg = message->msg;
result = itti_free (ITTI_MSG_ORIGIN_ID(*received_msg), message);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
/* Mark that the event has been processed */
itti_desc.threads[thread_id].events[i].events &= ~EPOLLIN;
return;
}
}
}
void itti_receive_msg(task_id_t task_id, MessageDef **received_msg)
{
itti_receive_msg_internal_event_fd(task_id, 0, received_msg);
}
void itti_poll_msg(task_id_t task_id, MessageDef **received_msg)
{
AssertFatal (task_id < itti_desc.task_max, "Task id (%d) is out of range (%d)!\n", task_id, itti_desc.task_max);
*received_msg = NULL;
{
struct message_list_s *message;
if (lfds611_queue_dequeue (itti_desc.tasks[task_id].message_queue, (void **) &message) == 1) {
int result;
*received_msg = message->msg;
result = itti_free (ITTI_MSG_ORIGIN_ID(*received_msg), message);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
}
}
if (*received_msg == NULL) {
ITTI_DEBUG(ITTI_DEBUG_POLL, " No message in queue[(%u:%s)]\n", task_id, itti_get_task_name(task_id));
}
}
int itti_create_task(task_id_t task_id, void *(*start_routine)(void *), void *args_p)
{
thread_id_t thread_id = TASK_GET_THREAD_ID(task_id);
int result;
AssertFatal (start_routine != NULL, "Start routine is NULL!\n");
AssertFatal (thread_id < itti_desc.thread_max, "Thread id (%d) is out of range (%d)!\n", thread_id, itti_desc.thread_max);
AssertFatal (itti_desc.threads[thread_id].task_state == TASK_STATE_NOT_CONFIGURED, "Task %d, thread %d state is not correct (%d)!\n",
task_id, thread_id, itti_desc.threads[thread_id].task_state);
itti_desc.threads[thread_id].task_state = TASK_STATE_STARTING;
ITTI_DEBUG(ITTI_DEBUG_INIT, " Creating thread for task %s ...\n", itti_get_task_name(task_id));
result = pthread_create (&itti_desc.threads[thread_id].task_thread, NULL, start_routine, args_p);
AssertFatal (result >= 0, "Thread creation for task %d, thread %d failed (%d)!\n", task_id, thread_id, result);
char name[16];
snprintf( name, sizeof(name), "ITTI %d", thread_id );
pthread_setname_np( itti_desc.threads[thread_id].task_thread, name );
itti_desc.created_tasks ++;
/* Wait till the thread is completely ready */
while (itti_desc.threads[thread_id].task_state != TASK_STATE_READY)
usleep (1000);
return 0;
}
void itti_set_task_real_time(task_id_t task_id)
{
thread_id_t thread_id = TASK_GET_THREAD_ID(task_id);
DevCheck(thread_id < itti_desc.thread_max, thread_id, itti_desc.thread_max, 0);
itti_desc.threads[thread_id].real_time = TRUE;
}
void itti_wait_ready(int wait_tasks)
{
itti_desc.wait_tasks = wait_tasks;
ITTI_DEBUG(ITTI_DEBUG_INIT,
" wait for tasks: %s, created tasks %d, ready tasks %d\n",
itti_desc.wait_tasks ? "yes" : "no",
itti_desc.created_tasks,
itti_desc.ready_tasks);
AssertFatal (itti_desc.created_tasks == itti_desc.ready_tasks, "Number of created tasks (%d) does not match ready tasks (%d), wait task %d!\n",
itti_desc.created_tasks, itti_desc.ready_tasks, itti_desc.wait_tasks);
}
void itti_mark_task_ready(task_id_t task_id)
{
thread_id_t thread_id = TASK_GET_THREAD_ID(task_id);
AssertFatal (thread_id < itti_desc.thread_max, "Thread id (%d) is out of range (%d)!\n", thread_id, itti_desc.thread_max);
#if 0
/* itti dump is disabled */
/* Register the thread in itti dump */
itti_dump_thread_use_ring_buffer();
#endif
/* Mark the thread as using LFDS queue */
lfds611_queue_use(itti_desc.tasks[task_id].message_queue);
itti_desc.threads[thread_id].task_state = TASK_STATE_READY;
itti_desc.ready_tasks ++;
while (itti_desc.wait_tasks != 0) {
usleep (10000);
}
ITTI_DEBUG(ITTI_DEBUG_INIT, " task %s started\n", itti_get_task_name(task_id));
}
void itti_exit_task(void)
{
task_id_t task_id = itti_get_current_task_id();
thread_id_t thread_id = TASK_GET_THREAD_ID(task_id);
#if defined(OAI_EMU) || defined(RTAI)
if (task_id > TASK_UNKNOWN) {
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLE_ITTI_RECV_MSG,
__sync_and_and_fetch (&itti_desc.vcd_receive_msg, ~(1L << task_id)));
}
#endif
itti_desc.threads[thread_id].task_state = TASK_STATE_NOT_CONFIGURED;
itti_desc.created_tasks--;
ITTI_DEBUG(ITTI_DEBUG_EXIT, "Thread for task %s (%d) exits\n", itti_get_task_name(task_id), task_id);
pthread_exit (NULL);
}
void itti_terminate_tasks(task_id_t task_id)
{
// Sends Terminate signals to all tasks.
itti_send_terminate_message (task_id);
if (itti_desc.thread_handling_signals) {
pthread_kill (itti_desc.thread_ref, SIGUSR1);
}
pthread_exit (NULL);
}
int itti_init(task_id_t task_max, thread_id_t thread_max, MessagesIds messages_id_max, const task_info_t *tasks_info,
const message_info_t *messages_info, const char * const messages_definition_xml, const char * const dump_file_name)
{
task_id_t task_id;
thread_id_t thread_id;
int ret;
itti_desc.message_number = 1;
ITTI_DEBUG(ITTI_DEBUG_INIT, " Init: %d tasks, %d threads, %d messages\n", task_max, thread_max, messages_id_max);
CHECK_INIT_RETURN(signal_mask());
/* Saves threads and messages max values */
itti_desc.task_max = task_max;
itti_desc.thread_max = thread_max;
itti_desc.messages_id_max = messages_id_max;
itti_desc.thread_handling_signals = FALSE;
itti_desc.tasks_info = tasks_info;
itti_desc.messages_info = messages_info;
/* Allocates memory for tasks info */
itti_desc.tasks = calloc (itti_desc.task_max, sizeof(task_desc_t));
/* Allocates memory for threads info */
itti_desc.threads = calloc (itti_desc.thread_max, sizeof(thread_desc_t));
/* Initializing each queue and related stuff */
for (task_id = TASK_FIRST; task_id < itti_desc.task_max; task_id++) {
ITTI_DEBUG(ITTI_DEBUG_INIT, " Initializing %stask %s%s%s\n",
itti_desc.tasks_info[task_id].parent_task != TASK_UNKNOWN ? "sub-" : "",
itti_desc.tasks_info[task_id].name,
itti_desc.tasks_info[task_id].parent_task != TASK_UNKNOWN ? " with parent " : "",
itti_desc.tasks_info[task_id].parent_task != TASK_UNKNOWN ?
itti_get_task_name(itti_desc.tasks_info[task_id].parent_task) : "");
ITTI_DEBUG(ITTI_DEBUG_INIT, " Creating queue of message of size %u\n", itti_desc.tasks_info[task_id].queue_size);
ret = lfds611_queue_new(&itti_desc.tasks[task_id].message_queue, itti_desc.tasks_info[task_id].queue_size);
if (0 == ret) {
AssertFatal (0, "lfds611_queue_new failed for task %s!\n", itti_get_task_name(task_id));
}
}
/* Initializing each thread */
for (thread_id = THREAD_FIRST; thread_id < itti_desc.thread_max; thread_id++) {
itti_desc.threads[thread_id].task_state = TASK_STATE_NOT_CONFIGURED;
itti_desc.threads[thread_id].epoll_fd = epoll_create1(0);
if (itti_desc.threads[thread_id].epoll_fd == -1) {
/* Always assert on this condition */
AssertFatal (0, "Failed to create new epoll fd: %s!\n", strerror(errno));
}
itti_desc.threads[thread_id].task_event_fd = eventfd(0, EFD_SEMAPHORE);
if (itti_desc.threads[thread_id].task_event_fd == -1) {
/* Always assert on this condition */
AssertFatal (0, " eventfd failed: %s!\n", strerror(errno));
}
itti_desc.threads[thread_id].nb_events = 1;
itti_desc.threads[thread_id].events = calloc(1, sizeof(struct epoll_event));
itti_desc.threads[thread_id].events->events = EPOLLIN | EPOLLERR;
itti_desc.threads[thread_id].events->data.fd = itti_desc.threads[thread_id].task_event_fd;
/* Add the event fd to the list of monitored events */
if (epoll_ctl(itti_desc.threads[thread_id].epoll_fd, EPOLL_CTL_ADD,
itti_desc.threads[thread_id].task_event_fd, itti_desc.threads[thread_id].events) != 0) {
/* Always assert on this condition */
AssertFatal (0, " epoll_ctl (EPOLL_CTL_ADD) failed: %s!\n", strerror(errno));
}
ITTI_DEBUG(ITTI_DEBUG_EVEN_FD, " Successfully subscribed fd %d for thread %d\n",
itti_desc.threads[thread_id].task_event_fd, thread_id);
}
itti_desc.running = 1;
itti_desc.wait_tasks = 0;
itti_desc.created_tasks = 0;
itti_desc.ready_tasks = 0;
#if 0
/* itti dump is disabled */
itti_dump_init (messages_definition_xml, dump_file_name);
#endif
CHECK_INIT_RETURN(timer_init ());
return 0;
}
void itti_wait_tasks_end(void)
{
int end = 0;
int thread_id;
task_id_t task_id;
int ready_tasks;
int result;
int retries = 10;
itti_desc.thread_handling_signals = TRUE;
itti_desc.thread_ref=pthread_self ();
/* Handle signals here */
while (end == 0) {
signal_handle (&end);
}
printf("closing all tasks\n");
sleep(1);
do {
ready_tasks = 0;
task_id = TASK_FIRST;
for (thread_id = THREAD_FIRST; thread_id < itti_desc.thread_max; thread_id++) {
/* Skip tasks which are not running */
if (itti_desc.threads[thread_id].task_state == TASK_STATE_READY) {
while (thread_id != TASK_GET_THREAD_ID(task_id)) {
task_id++;
}
result = pthread_tryjoin_np (itti_desc.threads[thread_id].task_thread, NULL);
ITTI_DEBUG(ITTI_DEBUG_EXIT, " Thread %s join status %d\n", itti_get_task_name(task_id), result);
if (result == 0) {
/* Thread has terminated */
itti_desc.threads[thread_id].task_state = TASK_STATE_ENDED;
} else {
/* Thread is still running, count it */
ready_tasks++;
}
}
}
if (ready_tasks > 0) {
usleep (100 * 1000);
}
} while ((ready_tasks > 0) && (retries--)&& (!end) );
printf("ready_tasks %d\n",ready_tasks);
itti_desc.running = 0;
if (ready_tasks > 0) {
ITTI_DEBUG(ITTI_DEBUG_ISSUES, " Some threads are still running, force exit\n");
exit (0);
}
#if 0
/* itti dump is disabled */
itti_dump_exit();
#endif
}
void itti_send_terminate_message(task_id_t task_id)
{
MessageDef *terminate_message_p;
terminate_message_p = itti_alloc_new_message (task_id, TERMINATE_MESSAGE);
itti_send_broadcast_message (terminate_message_p);
}