Add a Sleep() function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64101 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/System/Alarm.h

@@ -39,6 +39,11 @@ namespace sys {
   /// @returns -1=cancelled, 0=untriggered, 1=triggered
   int AlarmStatus();
 
+  /// Sleep for n seconds.
+  /// @returns nothing.
+  void Sleep(unsigned n);
+
+
 } // End sys namespace
 } // End llvm namespace
 

lib/System/Unix/Alarm.inc

@@ -66,3 +66,7 @@ int sys::AlarmStatus() {
     return 1;
   return 0;
 }
+
+void Sleep(unsigned n) {
+  ::sleep(n);
+}

lib/System/Win32/Alarm.inc

@@ -34,3 +34,7 @@ int sys::AlarmStatus() {
   // FIXME: Implement for Win32
   return 0;
 }
+
+void Sleep(unsigned n) {
+  Sleep(n*1000);
+}