rb_clear initial

ringbuf.c

@@ -45,6 +45,14 @@ rb_destroy(struct RingBuf *rb, void(free)())
   free(rb->buffer);
 }
 
+void
+rb_clear(struct RingBuf *rb)
+{
+  rb->count = 0;
+  rb->write_head = rb->buffer;
+  rb->read_head = rb->buffer;
+}
+
 enum WriteResult
 rb_push_back(struct RingBuf *rb, const void *item, MEMCPY_T memcpy_fn)
 {

ringbuf.h

@@ -39,6 +39,13 @@ enum ReadResult { Empty, ReadOk };  /** Result of a read */
 void rb_init(struct RingBuf *rb, rb_size_t capacity, ALLOC_T alloc,
              rb_size_t struct_size);
 
+/**
+ * @brief Clear the ring buffer
+ * @details This function will reset the read and write heads to the beginning
+ * of the buffer, and set the count to 0. It will not free the buffer.
+ * @param rb The ring buffer
+ */
+void rb_clear(struct RingBuf *rb);
 
 /**
  * @brief Insert data to the ring buffer