1 /*
   2  * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef OS_WINDOWS_VM_PDH_INTERFACE_HPP
  26 #define OS_WINDOWS_VM_PDH_INTERFACE_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include <pdh.h>
  30 #include <pdhmsg.h>
  31 
  32 class PdhDll: public AllStatic {
  33  private:
  34   static LONG       _pdh_reference_count;
  35   static LONG       _critical_section;
  36   static LONG       _initialized;
  37   static HMODULE    _hModule;
  38   static void       initialize();
  39   static PDH_STATUS (WINAPI *_PdhAddCounter)(HQUERY, LPCSTR, DWORD, HCOUNTER*);
  40   static PDH_STATUS (WINAPI *_PdhOpenQuery)(LPCWSTR, DWORD, HQUERY*);
  41   static DWORD      (WINAPI *_PdhCloseQuery)(HQUERY);
  42   static PDH_STATUS (WINAPI *_PdhCollectQueryData)(HQUERY);
  43   static DWORD      (WINAPI *_PdhGetFormattedCounterValue)(HCOUNTER, DWORD, LPDWORD, PPDH_FMT_COUNTERVALUE);
  44   static PDH_STATUS (WINAPI *_PdhEnumObjectItems)(LPCTSTR, LPCTSTR, LPCTSTR, LPTSTR, LPDWORD, LPTSTR, LPDWORD, DWORD, DWORD);
  45   static PDH_STATUS (WINAPI *_PdhRemoveCounter)(HCOUNTER);
  46   static PDH_STATUS (WINAPI *_PdhLookupPerfNameByIndex)(LPCSTR, DWORD, LPSTR, LPDWORD);
  47   static PDH_STATUS (WINAPI *_PdhMakeCounterPath)(PPDH_COUNTER_PATH_ELEMENTS, LPTSTR, LPDWORD, DWORD);
  48 
  49  public:
  50   static PDH_STATUS PdhAddCounter(HQUERY, LPCSTR, DWORD, HCOUNTER*);
  51   static PDH_STATUS PdhOpenQuery(LPCWSTR, DWORD, HQUERY*);
  52   static DWORD      PdhCloseQuery(HQUERY);
  53   static PDH_STATUS PdhCollectQueryData(HQUERY);
  54   static DWORD      PdhGetFormattedCounterValue(HCOUNTER, DWORD, LPDWORD, PPDH_FMT_COUNTERVALUE);
  55   static PDH_STATUS PdhEnumObjectItems(LPCTSTR, LPCTSTR, LPCTSTR, LPTSTR, LPDWORD, LPTSTR, LPDWORD, DWORD, DWORD);
  56   static PDH_STATUS PdhRemoveCounter(HCOUNTER);
  57   static PDH_STATUS PdhLookupPerfNameByIndex(LPCSTR, DWORD, LPSTR, LPDWORD);
  58   static PDH_STATUS PdhMakeCounterPath(PPDH_COUNTER_PATH_ELEMENTS, LPTSTR, LPDWORD, DWORD);
  59   static bool       PdhStatusFail(PDH_STATUS pdhStat);
  60   static bool       PdhAttach();
  61   static bool       PdhDetach();
  62 };
  63 
  64 #endif // OS_WINDOWS_VM_PDH_INTERFACE_HPP