kernel: spinlocks

kernel-src/include/spinlock.h

@@ -0,0 +1,22 @@
+#ifndef _SPINLOCK_H
+#define _SPINLOCK_H
+
+#include <stdbool.h>
+
+typedef int spinlock_t;
+
+#define SPINLOCK_INIT(x) x = 0;
+
+static inline void spinlock_acquire(spinlock_t *lock){
+	while(!__sync_bool_compare_and_swap(lock, 0, 1)) asm("pause");
+}
+
+static inline bool spinlock_try(spinlock_t *lock){
+	return __sync_bool_compare_and_swap(lock, 0, 1);
+}
+
+static inline void spinlock_release(spinlock_t *lock){
+	*lock = 0;
+}
+
+#endif