Initial commit

kernel/spinlock.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "kernel/lib.h"
+
+struct Spinlock
+{
+    volatile uint32_t next_ticket;
+    volatile uint32_t serving;
+    uint32_t          locking;
+};
+typedef struct Spinlock Spinlock;
+
+void spinlock_init(Spinlock* lock);
+void spinlock_acquire(Spinlock* lock);
+void spinlock_release(Spinlock* lock);