Add some comments explaining what MVT and EVT are, and how they differ.

[oota-llvm.git] / include / llvm / System / Alarm.h

diff --git a/include/llvm/System/Alarm.h b/include/llvm/System/Alarm.h
index 2b78da6dba2b932e77e513012ad73dd9866795a1..7c284167c2ce28318c5429d08c072a454e748dcd 100644 (file)
--- a/include/llvm/System/Alarm.h
+++ b/include/llvm/System/Alarm.h
@@ -2,13 +2,13 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
-// This file provides an operating system independent interface to alarm(2) 
-// type functionality. The Alarm class allows a one-shot alarm to be set up 
+// This file provides an operating system independent interface to alarm(2)
+// type functionality. The Alarm class allows a one-shot alarm to be set up
 // at some number of seconds in the future. When the alarm triggers, a method
 // is called to process the event
 //
@@ -17,12 +17,10 @@
 #ifndef LLVM_SYSTEM_ALARM_H
 #define LLVM_SYSTEM_ALARM_H
 
-#include "llvm/System/IncludeFile.h"
-
 namespace llvm {
 namespace sys {
 
-  /// This function registers an alarm to trigger some number of \p seconds in 
+  /// This function registers an alarm to trigger some number of \p seconds in
   /// the future. When that time arrives, the AlarmStatus function will begin
   /// to return 1 instead of 0. The user must poll the status of the alarm by
   /// making occasional calls to AlarmStatus. If the user sends an interrupt
@@ -33,17 +31,21 @@ namespace sys {
     unsigned seconds ///< Number of seconds in future when alarm arrives
   );
 
-  /// This function terminates the alarm previously set up 
+  /// This function terminates the alarm previously set up
   /// @returns nothing
   void TerminateAlarm();
 
-  /// This function acquires the status of the alarm. 
+  /// This function acquires the status of the alarm.
   /// @returns -1=cancelled, 0=untriggered, 1=triggered
   int AlarmStatus();
 
+  /// Sleep for n seconds. Warning: mixing calls to Sleep() and other *Alarm
+  /// calls may be a bad idea on some platforms (source: Linux man page).
+  /// @returns nothing.
+  void Sleep(unsigned n);
+
+
 } // End sys namespace
 } // End llvm namespace
 
-FORCE_DEFINING_FILE_TO_BE_LINKED(SystemAlarm)
-
 #endif