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diff src/share/vm/runtime/os.hpp @ 342:37f87013dfd8

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6711316: Open source the Garbage-First garbage collector Summary: First mercurial integration of the code for the Garbage-First garbage collector. Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author ysr
date Thu, 05 Jun 2008 15:57:56 -0700
parents fcbfc50865ab
children 1ee8caae33af
line wrap: on
line diff
--- a/src/share/vm/runtime/os.hpp	Wed Jun 04 13:51:09 2008 -0700
+++ b/src/share/vm/runtime/os.hpp	Thu Jun 05 15:57:56 2008 -0700
@@ -105,6 +105,18 @@
   static jlong elapsed_counter();
   static jlong elapsed_frequency();
 
+  // The "virtual time" of a thread is the amount of time a thread has
+  // actually run.  The first function indicates whether the OS supports
+  // this functionality for the current thread, and if so:
+  //   * the second enables vtime tracking (if that is required).
+  //   * the third tells whether vtime is enabled.
+  //   * the fourth returns the elapsed virtual time for the current
+  //     thread.
+  static bool supports_vtime();
+  static bool enable_vtime();
+  static bool vtime_enabled();
+  static double elapsedVTime();
+
   // Return current local time in a string (YYYY-MM-DD HH:MM:SS).
   // It is MT safe, but not async-safe, as reading time zone
   // information may require a lock on some platforms.