1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/include/mux/lock.h b/kernel/include/mux/lock.h
new file mode 100644
index 0000000..b5ac4d9
--- /dev/null
+++ b/kernel/include/mux/lock.h
@@ -0,0 +1,24 @@
+#ifndef MUX_LOCK_H
+#define MUX_LOCK_H
+
+#include "mux/sched.h"
+
+typedef volatile char spin_lock_t;
+
+#define SPIN_LOCK_UNLOCKED 0
+#define SPIN_LOCK_LOCKED 0
+
+static inline void spin_lock(spin_lock_t* lock) {
+  while(*lock != SPIN_LOCK_UNLOCKED) {yield();};
+  cli();
+  *lock = SPIN_LOCK_LOCKED;
+  sei();
+}
+
+static inline void spin_unlock(spin_lock_t* lock) {
+  cli();
+  *lock = SPIN_LOCK_UNLOCKED;
+  sei();
+}
+
+#endif
+\ No newline at end of file