1 files changed, 49 insertions, 0 deletions
diff --git a/rdns_scan/zmap4rdns/lib/queue.h b/rdns_scan/zmap4rdns/lib/queue.h
new file mode 100644
index 0000000..da7f218
--- /dev/null
+++ b/rdns_scan/zmap4rdns/lib/queue.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2021 Regents of the University of Michigan
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+#ifndef ZMAP_QUEUE_H
+#define ZMAP_QUEUE_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+
+typedef struct zqueue_node {
+	char *data;
+	struct zqueue_node *prev;
+	struct zqueue_node *next;
+} znode_t;
+
+typedef struct zqueue {
+	struct zqueue_node *front;
+	struct zqueue_node *back;
+	size_t size;
+	// Threading utilities
+	pthread_mutex_t lock;
+	pthread_cond_t empty;
+} zqueue_t;
+
+zqueue_t *queue_init();
+int is_empty(zqueue_t *queue);
+void push_back(char *data, zqueue_t *queue);
+znode_t *pop_front(zqueue_t *queue);
+znode_t *pop_front_unsafe(zqueue_t *queue);
+znode_t *get_front(zqueue_t *queue);
+znode_t *get_back(zqueue_t *queue);
+size_t get_size(zqueue_t *queue);
+
+#endif /* ZMAP_QUEUE_H */