Move queue_t into it own .h, .c

openair2/PHY_INTERFACE/queue.h

@@ -0,0 +1,45 @@
+/*
+  queue_t is a basic thread-safe non-blocking fixed-size queue.
+
+  put_queue returns false if the queue is full.
+  get_queue returns NULL if the queue is empty.
+
+  Example usage:
+
+    // Initialization:
+    queue_t fooq;
+    init_queue(&fooq);
+
+    // Producer:
+    foo_t *item = new_foo();
+    if (!put_queue(&fooq, item))
+      delete_foo(item);
+
+    // Consumer:
+    foo_t *item = get_queue(&fooq);
+    if (item)
+    {
+      do_something_with_foo(item);
+      delete_foo(item);
+    }
+*/
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <pthread.h>
+
+#define MAX_QUEUE_SIZE 512
+
+typedef struct queue_t {
+  void *items[MAX_QUEUE_SIZE];
+  size_t read_index, write_index;
+  size_t num_items;
+  pthread_mutex_t mutex;
+} queue_t;
+
+
+void init_queue(queue_t *q);
+bool put_queue(queue_t *q, void *item);
+void *get_queue(queue_t *q);