X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fmeshlink_queue.h;h=d075f1c8497b887ea17cc0e171c39a6c4fcda7f0;hb=4c57e6902219ecca1872e18e34365d8e54a0f407;hp=c86bf660ed22af5c4ea262932cf4e0a3de640ab0;hpb=196806f90f40fcc0cf727abd4bed6bc5aefff5ff;p=meshlink

diff --git a/src/meshlink_queue.h b/src/meshlink_queue.h
index c86bf660..d075f1c8 100644
--- a/src/meshlink_queue.h
+++ b/src/meshlink_queue.h
@@ -1,6 +1,9 @@
+#ifndef MESHLINK_QUEUE_H
+#define MESHLINK_QUEUE_H
+
 /*
     queue.h -- Thread-safe queue
-    Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
+    Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -17,9 +20,6 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifndef MESHLINK_QUEUE_H
-#define MESHLINK_QUEUE_H
-
 #include <pthread.h>
 #include <stdbool.h>
 #include <stddef.h>
@@ -36,30 +36,53 @@ typedef struct meshlink_queue_item {
 	struct meshlink_queue_item *next;
 } meshlink_queue_item_t;
 
-static inline bool meshlink_queue_push(meshlink_queue_t *queue, void *data) {
-	meshlink_queue_item_t *item = malloc(sizeof *item);
-	if(!item)
+static inline void meshlink_queue_init(meshlink_queue_t *queue) {
+	queue->head = NULL;
+	queue->tail = NULL;
+	pthread_mutexattr_t attr;
+	pthread_mutexattr_init(&attr);
+	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_DEFAULT);
+	pthread_mutex_init(&queue->mutex, &attr);
+}
+
+static inline void meshlink_queue_exit(meshlink_queue_t *queue) {
+	pthread_mutex_destroy(&queue->mutex);
+}
+
+static inline __attribute__((__warn_unused_result__)) bool meshlink_queue_push(meshlink_queue_t *queue, void *data) {
+	meshlink_queue_item_t *item = malloc(sizeof(*item));
+
+	if(!item) {
 		return false;
+	}
+
 	item->data = data;
 	item->next = NULL;
 	pthread_mutex_lock(&queue->mutex);
-	if(!queue->tail)
+
+	if(!queue->tail) {
 		queue->head = queue->tail = item;
-	else
+	} else {
 		queue->tail = queue->tail->next = item;
+	}
+
 	pthread_mutex_unlock(&queue->mutex);
 	return true;
 }
 
-static inline void *meshlink_queue_pop(meshlink_queue_t *queue) {
+static inline __attribute__((__warn_unused_result__)) void *meshlink_queue_pop(meshlink_queue_t *queue) {
 	meshlink_queue_item_t *item;
 	void *data;
 	pthread_mutex_lock(&queue->mutex);
+
 	if((item = queue->head)) {
 		queue->head = item->next;
-		if(!queue->head)
+
+		if(!queue->head) {
 			queue->tail = NULL;
+		}
 	}
+
 	pthread_mutex_unlock(&queue->mutex);
 	data = item ? item->data : NULL;
 	free(item);