mutex: stub implementation

No threading yet, so no real locking

Makefile

@@ -21,6 +21,7 @@ drivers += elf.o
 
 objects = exceptions.o
 objects += entry.o
+objects += mutex.o
 
 libc = libc/string/strcmp.o
 

mutex.cc

+#include "mutex.hh"
+
+void mutex::lock()
+{
+    // dummy - no threads yet
+}
+
+bool mutex::try_lock()
+{
+    // dummy - no threads yet
+    return true;
+}
+
+void mutex::unlock()
+{
+    // dummy - no threads yet
+}

mutex.hh

+#ifndef MUTEX_HH
+#define MUTEX_HH
+
+class mutex {
+public:
+    void lock();
+    bool try_lock();
+    void unlock();
+};
+
+#endif