mbv: move a few things around

mbv/lib/lock.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#ifndef __x86_64__
+#include "hal/interrupts.h"
+
+struct InterruptLock {
+    bool was_on;
+
+    InterruptLock() : was_on(EnableInterrupts(false)) {}
+
+    ~InterruptLock() { EnableInterrupts(was_on); }
+};
+#else  // __x86_64__
+#include <mutex>
+
+struct InterruptLock {
+    static std::recursive_mutex m;
+    InterruptLock() { m.lock(); }
+    ~InterruptLock() { m.unlock(); }
+};
+#endif  // __x86_64__