chap4

bac2/os/chap4/RingBuffer.c

@@ -0,0 +1,20 @@
+#include "RingBuffer.h"
+
+void rb_push(rb_t* rb, int el){
+	if(rb->filled)
+		return;
+	rb->data[rb->w_pos] = el; 
+	rb->w_pos = (rb->w_pos + 1) % rb->size;
+	if(rb->w_pos == rb->r_pos)
+		rb->filled = true;
+}
+int rb_pop(rb_t* rb){
+	if(rb->w_pos == rb->r_pos && !rb->filled){
+		rb->error = true;
+		return 0;
+	}
+	int ret = rb->data[rb->r_pos];
+	rb->r_pos = (rb->r_pos + 1) % rb->size;
+	rb->filled = false;
+	return ret;
+}