ringbuffer: datacount function

src/include/ringbuffer.h

@@ -12,6 +12,7 @@ typedef struct{
 } ringbuffer_t;
 
 
+size_t ringbuffer_datacount(ringbuffer_t* ringubffer);
 int ringbuffer_init(ringbuffer_t* ringbuffer, size_t size);
 size_t ringbuffer_read(ringbuffer_t* ringbuffer, void* buffer, size_t count);
 size_t ringbuffer_write(ringbuffer_t* ringbuffer, void* buffer, size_t count);

src/include/ringbuffer/ringbuffer.c

@@ -42,6 +42,17 @@ size_t ringbuffer_read(ringbuffer_t* ringbuffer, void* buffer, size_t count){
 
 }
 
+size_t ringbuffer_datacount(ringbuffer_t* ringbuffer){
+	spinlock_acquire(&ringbuffer->lock);
+	
+	size_t c = ringbuffer->write - ringbuffer->read;
+
+	spinlock_release(&ringbuffer->lock);
+	
+	return c;
+
+}
+
 size_t ringbuffer_write(ringbuffer_t* ringbuffer, void* buffer, size_t count){
 	
 	spinlock_acquire(&ringbuffer->lock);