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GitHub Repository: PojavLauncherTeam/openjdk-multiarch-jdk8u
 Path: blob/aarch64-shenandoah-jdk8u272-b10/hotspot/src/os/windows/vm/pdh_interface.hpp
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/*

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 * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * This code is free software; you can redistribute it and/or modify it

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 * under the terms of the GNU General Public License version 2 only, as

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 * published by the Free Software Foundation.

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 *

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 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 * version 2 for more details (a copy is included in the LICENSE file that

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 * accompanied this code).

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 *

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 * You should have received a copy of the GNU General Public License version

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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 *

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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 * or visit www.oracle.com if you need additional information or have any

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 * questions.

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 *

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 */

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#ifndef OS_WINDOWS_VM_PDH_INTERFACE_HPP

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#define OS_WINDOWS_VM_PDH_INTERFACE_HPP

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#include "memory/allocation.hpp"

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#include <pdh.h>

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#include <pdhmsg.h>

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class PdhDll: public AllStatic {

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 private:

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  static LONG       _pdh_reference_count;

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  static LONG       _critical_section;

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  static LONG       _initialized;

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  static HMODULE    _hModule;

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  static void       initialize();

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  static PDH_STATUS (WINAPI *_PdhAddCounter)(HQUERY, LPCSTR, DWORD, HCOUNTER*);

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  static PDH_STATUS (WINAPI *_PdhOpenQuery)(LPCWSTR, DWORD, HQUERY*);

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  static DWORD      (WINAPI *_PdhCloseQuery)(HQUERY);

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  static PDH_STATUS (WINAPI *_PdhCollectQueryData)(HQUERY);

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  static DWORD      (WINAPI *_PdhGetFormattedCounterValue)(HCOUNTER, DWORD, LPDWORD, PPDH_FMT_COUNTERVALUE);

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  static PDH_STATUS (WINAPI *_PdhEnumObjectItems)(LPCTSTR, LPCTSTR, LPCTSTR, LPTSTR, LPDWORD, LPTSTR, LPDWORD, DWORD, DWORD);

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  static PDH_STATUS (WINAPI *_PdhRemoveCounter)(HCOUNTER);

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  static PDH_STATUS (WINAPI *_PdhLookupPerfNameByIndex)(LPCSTR, DWORD, LPSTR, LPDWORD);

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  static PDH_STATUS (WINAPI *_PdhMakeCounterPath)(PPDH_COUNTER_PATH_ELEMENTS, LPTSTR, LPDWORD, DWORD);

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 public:

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  static PDH_STATUS PdhAddCounter(HQUERY, LPCSTR, DWORD, HCOUNTER*);

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  static PDH_STATUS PdhOpenQuery(LPCWSTR, DWORD, HQUERY*);

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  static DWORD      PdhCloseQuery(HQUERY);

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  static PDH_STATUS PdhCollectQueryData(HQUERY);

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  static DWORD      PdhGetFormattedCounterValue(HCOUNTER, DWORD, LPDWORD, PPDH_FMT_COUNTERVALUE);

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  static PDH_STATUS PdhEnumObjectItems(LPCTSTR, LPCTSTR, LPCTSTR, LPTSTR, LPDWORD, LPTSTR, LPDWORD, DWORD, DWORD);

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  static PDH_STATUS PdhRemoveCounter(HCOUNTER);

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  static PDH_STATUS PdhLookupPerfNameByIndex(LPCSTR, DWORD, LPSTR, LPDWORD);

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  static PDH_STATUS PdhMakeCounterPath(PPDH_COUNTER_PATH_ELEMENTS, LPTSTR, LPDWORD, DWORD);

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  static bool       PdhStatusFail(PDH_STATUS pdhStat);

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  static bool       PdhAttach();

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  static bool       PdhDetach();

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};

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#endif // OS_WINDOWS_VM_PDH_INTERFACE_HPP

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