2 files changed, 16 insertions, 1 deletions
diff --git a/src/common/include/sched.h b/src/common/include/sched.h
new file mode 100644
index 0000000..0f8f8f4
--- /dev/null
+++ b/src/common/include/sched.h
@@ -0,0 +1,15 @@
+#ifndef DEF_MUTEX_H
+#define DEF_MUTEX_H
+
+#include <types.h>
+
+#define MUTEX_LOCKED 1
+#define MUTEX_UNLOCKED 0
+
+//A mutex is just an uint32_t
+
+int mutex_lock(uint32_t* mutex);	//wait for mutex to be free
+int mutex_lockE(uint32_t* mutex);	//lock mutex only if free, returns !0 if locked, 0 if was busy
+void mutex_unlock(uint32_t* mutex);
+
+#endif
diff --git a/src/common/include/stdlib.h b/src/common/include/stdlib_common.h
index 2c5e6dd..80c188f 100644
--- a/src/common/include/stdlib.h
+++ b/src/common/include/stdlib_common.h
@@ -7,7 +7,7 @@
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 
 void *memcpy(void *dest, const void *src, int count);
-uint8_t *memset(uint8_t *dest, uint8_t val, int count);
+void *memset(void *dest, int val, int count);
 uint16_t *memsetw(uint16_t *dest, uint16_t val, int count);
 
 #endif