update

os.h

@@ -17,4 +17,12 @@ bool os_fileAppend(Arena *arena, string filename, const byte *contents, size_t c
 // ### Standard IO ###
 void os_print(StdStream target, const char *fmt, va_list argList);
 
+// ### Multithreading ###
+typedef struct OS_Thread OS_Thread;
+struct OS_Thread {
+    uint64 id;
+};
+
+OS_Thread os_createThread(void *(*entry)(void *ctx), void *ctx);
+
 #endif