/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2015 Eurecom
OpenAirInterface 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 3 of the License, or
(at your option) any later version.
OpenAirInterface 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 OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see .
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@eurecom.fr
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
*******************************************************************************/
/*! \file link_manager.c
* \brief this is the implementation of a link manager
* \author Cedric Roux
* \date November 2015
* \version 1.0
* \email: cedric.roux@eurecom.fr
* @ingroup _mac
*/
//#ifndef SERVER_TEST
//#define SERVER_TEST
//#endif
#include "link_manager.h"
#include "log.h"
#include
#include
#include
/* that thread reads messages in the queue and sends them to the link */
static void *link_manager_sender_thread(void *_manager)
{
link_manager_t *manager = _manager;
void *data;
int size;
int priority;
LOG_D(MAC, "starting link manager sender thread\n");
while (manager->run) {
while (message_get(manager->send_queue, &data, &size, &priority) == 0) {
link_send_packet(manager->socket_link, data, size);
free(data);
}
// if (message_get(manager->send_queue, &data, &size, &priority))
// goto error;
//if (link_send_packet(manager->socket_link, data, size))
// goto error;
//free(data);
}
LOG_D(MAC, "link manager sender thread quits\n");
return NULL;
error:
LOG_E(MAC, "%s: error\n", __FUNCTION__);
return NULL;
}
/* that thread receives messages from the link and puts them in the queue */
static void *link_manager_receiver_thread(void *_manager)
{
link_manager_t *manager = _manager;
void *data;
int size;
LOG_D(MAC, "starting link manager receiver thread\n");
while (manager->run) {
if (link_receive_packet(manager->socket_link, &data, &size))
goto error;
/* todo: priority */
if (message_put(manager->receive_queue, data, size, 0))
goto error;
}
LOG_D(MAC, "link manager receiver thread quits\n");
return NULL;
error:
LOG_E(MAC, "%s: error\n", __FUNCTION__);
return NULL;
}
link_manager_t *create_link_manager(
message_queue_t *send_queue,
message_queue_t *receive_queue,
socket_link_t *link)
{
link_manager_t *ret = NULL;
pthread_attr_t attr;
pthread_t t;
LOG_D(MAC, "create new link manager\n");
ret = calloc(1, sizeof(link_manager_t));
if (ret == NULL)
goto error;
ret->send_queue = send_queue;
ret->receive_queue = receive_queue;
ret->socket_link = link;
ret->run = 1;
if (pthread_attr_init(&attr))
goto error;
// Make the async interface threads real-time
//#ifndef LOWLATENCY
struct sched_param sched_param_recv_thread;
struct sched_param sched_param_send_thread;
sched_param_recv_thread.sched_priority = sched_get_priority_max(SCHED_RR) - 1;
pthread_attr_setschedparam(&attr, &sched_param_recv_thread);
pthread_attr_setschedpolicy(&attr, SCHED_RR);
//#endif
if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED))
goto error;
if (pthread_create(&t, &attr, link_manager_sender_thread, ret))
goto error;
ret->sender = t;
if (pthread_create(&t, &attr, link_manager_receiver_thread, ret))
/* we should destroy the other thread here */
goto error;
ret->receiver = t;
if (pthread_attr_destroy(&attr))
/* to be clean we should destroy the threads at this point,
* even if in practice we never reach it */
goto error;
return ret;
error:
LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
free(ret);
return NULL;
}
void destroy_link_manager(link_manager_t *manager)
{
LOG_D(MAC, "destroying link manager\n");
manager->run = 0;
/* todo: force threads to stop (using a dummy message?) */
}
#ifdef SERVER_TEST
#include
int main(void)
{
socket_link_t *link;
message_queue_t *send_queue;
message_queue_t *receive_queue;
link_manager_t *manager;
void *data;
int size;
int priority;
printf("starting server\n");
link = new_link_server(2210);
if (link == NULL) goto error;
send_queue = new_message_queue();
if (send_queue == NULL) goto error;
receive_queue = new_message_queue();
if (receive_queue == NULL) goto error;
manager = create_link_manager(send_queue, receive_queue, link);
if (manager == NULL) goto error;
data = strdup("hello"); if (data == NULL) goto error;
if (message_put(send_queue, data, 6, 100)) goto error;
if (message_get(receive_queue, &data, &size, &priority)) goto error;
printf("received message:\n");
printf(" data: %s\n", (char *)data);
printf(" size: %d\n", size);
printf(" priority: %d\n", priority);
printf("server ends\n");
return 0;
error:
printf("there was an error\n");
return 1;
}
#endif
#ifdef CLIENT_TEST
#include
#include
int main(void)
{
socket_link_t *link;
message_queue_t *send_queue;
message_queue_t *receive_queue;
link_manager_t *manager;
void *data;
int size;
int priority;
printf("starting client\n");
link = new_link_client("127.0.0.1", 2210);
if (link == NULL) goto error;
send_queue = new_message_queue();
if (send_queue == NULL) goto error;
receive_queue = new_message_queue();
if (receive_queue == NULL) goto error;
manager = create_link_manager(send_queue, receive_queue, link);
if (manager == NULL) goto error;
if (message_get(receive_queue, &data, &size, &priority)) goto error;
printf("received message:\n");
printf(" data: %s\n", (char *)data);
printf(" size: %d\n", size);
printf(" priority: %d\n", priority);
data = strdup("world"); if (data == NULL) goto error;
if (message_put(send_queue, data, 6, 200)) goto error;
/* let's wait for the message to be sent (unreliable sleep, but does it for the test) */
sleep(1);
printf("client ends\n");
return 0;
error:
printf("there was an error\n");
return 1;
}
#endif