1 files changed, 17 insertions, 0 deletions
diff --git a/include/util/mutex.h b/include/util/mutex.h
new file mode 100644
index 0000000..524a461
--- /dev/null
+++ b/include/util/mutex.h
@@ -0,0 +1,17 @@
+#ifndef UTIL_MUTEX_H
+#define UTIL_MUTEX_H
+
+#define NULL_PID 0
+#define SYS_PID 1
+#define SCHED_PID 2
+
+struct Mutex {
+	void* addr;
+	unsigned long pid;
+} __attribute__((packed, aligned(4)));;
+
+unsigned char lock_mutex(struct Mutex*, unsigned long);
+unsigned char release_mutex(struct Mutex*, unsigned long);
+struct Mutex* create_mutex(void* addr);
+
+#endif