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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <synch.h>
#include "isns_server.h"
#include "isns_msgq.h"
#include "isns_cache.h"
#include "isns_obj.h"
#include "isns_log.h"
msg_queue_t *
queue_calloc(
)
{
msg_queue_t *q;
q = (msg_queue_t *)calloc(1, sizeof (msg_queue_t));
if (q) {
if (sema_init(&q->q_sema, 0, USYNC_THREAD, NULL) ||
pthread_mutex_init(&q->q_mutex, NULL)) {
free(q);
q = NULL;
}
}
return (q);
}
int
queue_msg_set(
msg_queue_t *q,
msg_id_t id,
void *data
)
{
msg_text_t *msg;
msg = (msg_text_t *)calloc(1, sizeof (msg_text_t));
if (!msg) {
return (1);
}
msg->id = id;
msg->data = data;
(void) pthread_mutex_lock(&q->q_mutex);
if (q->q_head == NULL) {
ASSERT(!q->q_tail);
q->q_head = msg;
q->q_tail = msg;
} else {
ASSERT(q->q_tail);
q->q_tail->next = msg;
msg->prev = q->q_tail;
q->q_tail = msg;
}
(void) pthread_mutex_unlock(&q->q_mutex);
(void) sema_post(&q->q_sema);
return (0);
}
msg_text_t *
queue_msg_get(
msg_queue_t *q
)
{
msg_text_t *msg;
while (sema_wait(&q->q_sema)) {
(void) sleep(1);
}
(void) pthread_mutex_lock(&q->q_mutex);
msg = q->q_head;
ASSERT(msg);
q->q_head = msg->next;
if (q->q_head == NULL) {
q->q_tail = NULL;
}
(void) pthread_mutex_unlock(&q->q_mutex);
return (msg);
}
void
queue_msg_free(
msg_text_t *msg
)
{
free(msg);
}
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