Merge branch 'solutions' into 'master'

Finished function dequeue. Pushing to branch solutions from now on.

See merge request !1

src/ring_buffer.c

@@ -82,22 +82,23 @@ ssize_t ring_buffer_dequeue(so_ring_buffer_t *ring, void *data, size_t size)
 	// try getting the mutex and locking it
 	pthread_mutex_lock(&ring->mutex);
 
-	// we have space and we are running so we copi the data inside ring buffer
-	memcpy(ring->data + ring->write_pos, data, size);
+	// we have something and we are running so we copy the data from
+	// the ring buffer to the data parameter
+	memcpy(data, ring->data + ring->read_pos, size);
 
-	// lenght is increased
-	ring->len ++;
+	// lenght is decreased
+	ring->len --;
 
-	// write possition is increased and looped if necessarily
-	ring->write_pos ++;
-	if (ring->write_pos >= ring->cap)
-		ring->write_pos %= ring->cap; // operaation might fail sometimes based on my web research
+	// read possition is increased and looped if necessarily
+	ring->read_pos ++;
+	if (ring->read_pos >= ring->cap)
+		ring->read_pos %= ring->cap; // operaation might fail sometimes based on my web research
 
-	// notify sleeping threads that the buffer has at least one element in it
-	// that can be removed
-	sem_post(&ring->rb_empty);
+	// notify sleeping threads that the buffer
+	// has room for one element to be added
+	sem_post(&ring->rb_full);
 
-	// unlock the mutex of my adding operation
+	// unlock the mutex of my removing operation
 	pthread_mutex_unlock(&ring->mutex);
 	return -1;
 }