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