sleep; appl + kappl do smth more or less usefull

kernel/syscall/stub.h

@@ -6,17 +6,17 @@ namespace Syscall {
  *  \note the syscall number must correspond to the values in the syscall stub!
  */
 enum class ID : size_t {
-	TEST = 0,
-	WRITE = 1,
-	READ = 2,
-  //SLEEP =3,
-  SEM_INIT=4,
-  SEM_DESTROY=5,
-  SEM_WAIT=6,
-  SEM_SIGNAL=7,
-  //SYS_GETPID=8,
-  //SYS_EXIT= 9,
-  //SYS_KILL=10
+    TEST = 0,
+    WRITE = 1,
+    READ = 2,
+    SLEEP = 3,
+    SEM_INIT=4,
+    SEM_DESTROY=5,
+    SEM_WAIT=6,
+    SEM_SIGNAL=7,
+    //SYS_GETPID=8,
+    //SYS_EXIT= 9,
+    //SYS_KILL=10
 };
 }  // namespace Syscall
 
@@ -41,6 +41,10 @@ extern "C" ssize_t sys_safe_call(Syscall::ID id, size_t p1, size_t p2,
 	return sys_call(Syscall::ID::READ, fd, (size_t)buf, len, 0, 0);
 }
 
+[[gnu::always_inline]] static inline int sleep(size_t ms){
+	return sys_call(Syscall::ID::SLEEP, ms,0,0,0,0);
+}
+
 [[gnu::always_inline]] static inline int sem_init(int fd, int semid, int value) {
   return sys_call(Syscall::ID::SEM_INIT, fd, semid, value, 0,0);
 }