src/os/windows/vm/os_windows.cpp

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -626,12 +626,10 @@
   CloseHandle(osthread->thread_handle());
   CloseHandle(osthread->interrupt_event());
   delete osthread;
 }
 
-
-static int    has_performance_count = 0;
 static jlong first_filetime;
 static jlong initial_performance_count;
 static jlong performance_frequency;
 
 

@@ -643,11 +641,11 @@
 }
 
 
 jlong os::elapsed_counter() {
   LARGE_INTEGER count;
-  if (has_performance_count) {
+  if (win32::_has_performance_count) {
     QueryPerformanceCounter(&count);
     return as_long(count) - initial_performance_count;
   } else {
     FILETIME wt;
     GetSystemTimeAsFileTime(&wt);

@@ -655,11 +653,11 @@
   }
 }
 
 
 jlong os::elapsed_frequency() {
-  if (has_performance_count) {
+  if (win32::_has_performance_count) {
     return performance_frequency;
   } else {
    // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601.
    return 10000000;
   }

@@ -734,19 +732,19 @@
 bool os::bind_to_processor(uint processor_id) {
   // Not yet implemented.
   return false;
 }
 
-static void initialize_performance_counter() {
+void os::win32::initialize_performance_counter() {
   LARGE_INTEGER count;
   if (QueryPerformanceFrequency(&count)) {
-    has_performance_count = 1;
+    win32::_has_performance_count = 1;
     performance_frequency = as_long(count);
     QueryPerformanceCounter(&count);
     initial_performance_count = as_long(count);
   } else {
-    has_performance_count = 0;
+    win32::_has_performance_count = 0;
     FILETIME wt;
     GetSystemTimeAsFileTime(&wt);
     first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
   }
 }

@@ -837,11 +835,11 @@
     return windows_to_java_time(wt);
   }
 }
 
 jlong os::javaTimeNanos() {
-  if (!has_performance_count) {
+  if (!win32::_has_performance_count) {
     return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do.
   } else {
     LARGE_INTEGER current_count;
     QueryPerformanceCounter(&current_count);
     double current = as_long(current_count);

@@ -850,11 +848,11 @@
     return time;
   }
 }
 
 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
-  if (!has_performance_count) {
+  if (!win32::_has_performance_count) {
     // javaTimeMillis() doesn't have much percision,
     // but it is not going to wrap -- so all 64 bits
     info_ptr->max_value = ALL_64_BITS;
 
     // this is a wall clock timer, so may skip

@@ -3680,10 +3678,12 @@
 
 bool   os::win32::_is_nt              = false;
 bool   os::win32::_is_windows_2003    = false;
 bool   os::win32::_is_windows_server  = false;
 
+bool   os::win32::_has_performance_count = 0;
+
 void os::win32::initialize_system_info() {
   SYSTEM_INFO si;
   GetSystemInfo(&si);
   _vm_page_size    = si.dwPageSize;
   _vm_allocation_granularity = si.dwAllocationGranularity;