1 files changed, 23 insertions, 0 deletions
diff --git a/src/libk/include/shared/ring.h b/src/libk/include/shared/ring.h
new file mode 100644
index 0000000..dbaf331
--- /dev/null
+++ b/src/libk/include/shared/ring.h
@@ -0,0 +1,23 @@
+#pragma once
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct {
+	char *buf;
+	size_t capacity;
+	size_t _head, _tail;
+} ring_t;
+
+/** Returns amount of bytes stored in the buffer. */
+size_t	ring_used(ring_t*);
+/** Returns amount of space left in the buffer. */
+size_t	ring_avail(ring_t*);
+
+void	ring_put(ring_t*, const void*, size_t);
+void	ring_put1b(ring_t*, uint8_t);
+
+size_t	ring_get(ring_t*, void*, size_t);
+
+/** Consumes up to `len` bytes, and returns a pointer to the buffer where it's stored.
+ * Not thread-safe. */
+void*	ring_contig(ring_t*, size_t *len);