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/*
* 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
*/
/*! \file ringbuffer_queue.c
* \brief Lock-free ringbuffer used for async message passing of agent
* \author Xenofon Foukas
* \date March 2016
* \version 1.0
* \email: x.foukas@sms.ed.ac.uk
* @ingroup _mac
*/
#include "ringbuffer_queue.h"
#include "common/utils/LOG/log.h"
message_queue_t * new_message_queue(int size) {
message_queue_t *ret = NULL;
ret = calloc(1, sizeof(message_queue_t));
if (ret == NULL)
goto error;
lfds700_misc_library_init_valid_on_current_logical_core();
lfds700_misc_prng_init(&(ret->ps));
ret->ringbuffer_array = malloc(sizeof(struct lfds700_ringbuffer_element) * size);
lfds700_ringbuffer_init_valid_on_current_logical_core(&(ret->ringbuffer_state),
ret->ringbuffer_array,
size,
&(ret->ps),
NULL);
return ret;
error:
LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
if (ret != NULL) {
free(ret->ringbuffer_array);
memset(ret, 0, sizeof(message_queue_t));
free(ret);
}
return NULL;
}
int message_put(message_queue_t *queue, void *data, int size, int priority) {
struct lfds700_misc_prng_state ls;
enum lfds700_misc_flag overwrite_occurred_flag;
message_t *overwritten_msg;
message_t *m = NULL;
LFDS700_MISC_MAKE_VALID_ON_CURRENT_LOGICAL_CORE_INITS_COMPLETED_BEFORE_NOW_ON_ANY_OTHER_LOGICAL_CORE;
lfds700_misc_prng_init(&ls);
m = calloc(1, sizeof(message_t));
if (m == NULL)
goto error;
m->data = data;
m->size = size;
m->priority = priority;
lfds700_ringbuffer_write(&(queue->ringbuffer_state),
NULL,
(void *) m,
&overwrite_occurred_flag,
NULL,
(void **) &overwritten_msg,
&ls);
if (overwrite_occurred_flag == LFDS700_MISC_FLAG_RAISED) {
free(overwritten_msg->data);
free(overwritten_msg);
}
return 0;
error:
free(m);
LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
return -1;
}
int message_get(message_queue_t *queue, void **data, int *size, int *priority) {
message_t *m;
struct lfds700_misc_prng_state ls;
LFDS700_MISC_MAKE_VALID_ON_CURRENT_LOGICAL_CORE_INITS_COMPLETED_BEFORE_NOW_ON_ANY_OTHER_LOGICAL_CORE;
lfds700_misc_prng_init(&ls);
if (lfds700_ringbuffer_read(&(queue->ringbuffer_state), NULL, (void **) &m, &ls) == 0) {
return -1;
}
*data = m->data;
*size = m->size;
*priority = m->priority;
free(m);
return 0;
}
void destroy_message_queue(message_queue_t *queue) {
struct lfds700_misc_prng_state ls;
message_t *m;
LFDS700_MISC_MAKE_VALID_ON_CURRENT_LOGICAL_CORE_INITS_COMPLETED_BEFORE_NOW_ON_ANY_OTHER_LOGICAL_CORE;
lfds700_misc_prng_init(&ls);
while (lfds700_ringbuffer_read(&(queue->ringbuffer_state), NULL, (void **) &m, &ls) != 0) {
free(m->data);
memset(m, 0, sizeof(message_t));
free(m);
}
free(queue->ringbuffer_array);
memset(queue, 0, sizeof(message_queue_t));
free(queue);
}