| 1 | /**************************************************************************
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| 2 | * Copyright (C) 2004-2007 by Michael Medin <michael@medin.name> *
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| 3 | * *
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| 4 | * This code is part of NSClient++ - http://trac.nakednuns.org/nscp *
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| 5 | * *
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| 6 | * This program is free software; you can redistribute it and/or modify *
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| 7 | * it under the terms of the GNU General Public License as published by *
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| 8 | * the Free Software Foundation; either version 2 of the License, or *
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| 9 | * (at your option) any later version. *
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| 10 | * *
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| 11 | * This program is distributed in the hope that it will be useful, *
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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| 14 | * GNU General Public License for more details. *
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| 15 | * *
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| 16 | * You should have received a copy of the GNU General Public License *
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| 17 | * along with this program; if not, write to the *
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| 18 | * Free Software Foundation, Inc., *
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| 19 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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| 20 | ***************************************************************************/
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| 21 | #pragma once
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| 22 |
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| 23 | #include <pdh/core.hpp>
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| 24 | #include <error.hpp>
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| 25 | #include <pdh/basic_impl.hpp>
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| 26 | #include <Mutex.h>
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| 27 |
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| 28 | namespace PDH {
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| 29 |
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| 30 | class ThreadedSafePDH : public PDH::NativeExternalPDH {
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| 31 | MutexHandler mutex_;
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| 32 | typedef std::list<PDHImplSubscriber*> subscriber_list;
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| 33 | subscriber_list subscribers_;
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| 34 | private:
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| 35 |
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| 36 | public:
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| 37 | ThreadedSafePDH() : NativeExternalPDH() {
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| 38 | }
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| 39 |
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| 40 | bool reload() {
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| 41 | MutexLock lock(mutex_);
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| 42 | if (!lock.hasMutex())
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| 43 | throw PDHException(_T("Failed to get mutex for reload"));
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| 44 | return reload_unsafe();
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| 45 | }
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| 46 |
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| 47 | bool reload_unsafe() {
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| 48 | for(subscriber_list::const_iterator cit = subscribers_.begin(); cit != subscribers_.end(); ++cit)
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| 49 | (*cit)->on_unload();
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| 50 | unload_procs();
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| 51 | load_procs();
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| 52 | for(subscriber_list::const_iterator cit = subscribers_.begin(); cit != subscribers_.end(); ++cit)
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| 53 | (*cit)->on_reload();
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| 54 | return true;
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| 55 | }
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| 56 | public:
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| 57 |
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| 58 | virtual void add_listener(PDHImplSubscriber* sub) {
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| 59 | MutexLock lock(mutex_);
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| 60 | if (!lock.hasMutex())
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| 61 | throw PDHException(_T("Failed to get mutex for reload"));
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| 62 | subscribers_.push_back(sub);
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| 63 | }
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| 64 | virtual void remove_listener(PDHImplSubscriber* sub) {
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| 65 | MutexLock lock(mutex_);
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| 66 | if (!lock.hasMutex())
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| 67 | throw PDHException(_T("Failed to get mutex for reload"));
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| 68 | for(subscriber_list::iterator it = subscribers_.begin(); it != subscribers_.end(); ++it) {
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| 69 | if ( (*it) == sub)
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| 70 | it = subscribers_.erase(it);
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| 71 | if (it == subscribers_.end())
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| 72 | break;
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| 73 | }
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| 74 | }
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| 75 |
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| 76 | virtual PDHError PdhLookupPerfIndexByName(LPCTSTR szMachineName,LPCTSTR szName,DWORD *dwIndex) {
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| 77 | MutexLock lock(mutex_);
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| 78 | if (!lock.hasMutex())
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| 79 | throw PDHException(_T("Failed to get mutex for PdhLookupPerfIndexByName"));
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| 80 | if (pPdhLookupPerfIndexByName == NULL)
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| 81 | throw PDHException(_T("Failed to initalize PdhLookupPerfIndexByName"));
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| 82 | return PDH::PDHError(pPdhLookupPerfIndexByName(szMachineName,szName,dwIndex));
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| 83 | }
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| 84 |
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| 85 | virtual PDHError PdhLookupPerfNameByIndex(LPCTSTR szMachineName,DWORD dwNameIndex,LPTSTR szNameBuffer,LPDWORD pcchNameBufferSize) {
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| 86 | MutexLock lock(mutex_);
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| 87 | if (!lock.hasMutex())
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| 88 | throw PDHException(_T("Failed to get mutex for PdhLookupPerfNameByIndex"));
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| 89 | if (pPdhLookupPerfNameByIndex == NULL)
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| 90 | throw PDHException(_T("Failed to initalize PdhLookupPerfNameByIndex :("));
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| 91 | return PDH::PDHError(pPdhLookupPerfNameByIndex(szMachineName,dwNameIndex,szNameBuffer,pcchNameBufferSize));
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| 92 | }
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| 93 |
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| 94 | virtual PDHError PdhExpandCounterPath(LPCTSTR szWildCardPath, LPTSTR mszExpandedPathList, LPDWORD pcchPathListLength) {
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| 95 | MutexLock lock(mutex_);
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| 96 | if (!lock.hasMutex())
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| 97 | throw PDHException(_T("Failed to get mutex for PdhExpandCounterPath"));
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| 98 | if (pPdhExpandCounterPath == NULL)
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| 99 | throw PDHException(_T("Failed to initalize PdhLookupPerfNameByIndex :("));
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| 100 | return PDH::PDHError(pPdhExpandCounterPath(szWildCardPath,mszExpandedPathList,pcchPathListLength));
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| 101 | }
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| 102 | virtual PDHError PdhGetCounterInfo(PDH::PDH_HCOUNTER hCounter, BOOLEAN bRetrieveExplainText, LPDWORD pdwBufferSize, PDH_COUNTER_INFO *lpBuffer) {
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| 103 | MutexLock lock(mutex_);
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| 104 | if (!lock.hasMutex())
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| 105 | throw PDHException(_T("Failed to get mutex for PdhGetCounterInfo"));
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| 106 | if (pPdhGetCounterInfo == NULL)
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| 107 | throw PDHException(_T("Failed to initalize PdhGetCounterInfo :("));
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| 108 | return PDH::PDHError(pPdhGetCounterInfo(hCounter,bRetrieveExplainText,pdwBufferSize,lpBuffer));
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| 109 | }
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| 110 | virtual PDHError PdhAddCounter(PDH::PDH_HQUERY hQuery, LPCWSTR szFullCounterPath, DWORD_PTR dwUserData, PDH::PDH_HCOUNTER * phCounter) {
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| 111 | MutexLock lock(mutex_);
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| 112 | if (!lock.hasMutex())
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| 113 | throw PDHException(_T("Failed to get mutex for PdhAddCounter"));
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| 114 | if (pPdhAddCounter == NULL)
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| 115 | throw PDHException(_T("Failed to initalize PdhAddCounter :("));
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| 116 | return PDH::PDHError(pPdhAddCounter(hQuery,szFullCounterPath,dwUserData,phCounter));
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| 117 | }
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| 118 | virtual PDHError PdhRemoveCounter(PDH::PDH_HCOUNTER hCounter) {
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| 119 | MutexLock lock(mutex_);
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| 120 | if (!lock.hasMutex())
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| 121 | throw PDHException(_T("Failed to get mutex for PdhRemoveCounter"));
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| 122 | if (pPdhRemoveCounter == NULL)
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| 123 | throw PDHException(_T("Failed to initalize PdhRemoveCounter :("));
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| 124 | return PDH::PDHError(pPdhRemoveCounter(hCounter));
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| 125 | }
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| 126 | virtual PDHError PdhGetFormattedCounterValue(PDH_HCOUNTER hCounter, DWORD dwFormat, LPDWORD lpdwType, PPDH_FMT_COUNTERVALUE pValue) {
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| 127 | MutexLock lock(mutex_);
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| 128 | if (!lock.hasMutex())
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| 129 | throw PDHException(_T("Failed to get mutex for PdhGetFormattedCounterValue"));
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| 130 | if (pPdhGetFormattedCounterValue == NULL)
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| 131 | throw PDHException(_T("Failed to initalize PdhGetFormattedCounterValue :("));
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| 132 | return PDH::PDHError(pPdhGetFormattedCounterValue(hCounter, dwFormat, lpdwType, pValue));
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| 133 | }
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| 134 | virtual PDHError PdhOpenQuery(LPCWSTR szDataSource, DWORD_PTR dwUserData, PDH::PDH_HQUERY * phQuery) {
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| 135 | MutexLock lock(mutex_);
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| 136 | if (!lock.hasMutex())
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| 137 | throw PDHException(_T("Failed to get mutex for PdhOpenQuery"));
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| 138 | if (pPdhOpenQuery == NULL)
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| 139 | throw PDHException(_T("Failed to initalize PdhOpenQuery :("));
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| 140 | return PDH::PDHError(pPdhOpenQuery(szDataSource, dwUserData, phQuery));
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| 141 | }
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| 142 | virtual PDHError PdhCloseQuery(PDH_HQUERY hQuery) {
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| 143 | MutexLock lock(mutex_);
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| 144 | if (!lock.hasMutex())
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| 145 | throw PDHException(_T("Failed to get mutex for PdhCloseQuery"));
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| 146 | if (pPdhCloseQuery == NULL)
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| 147 | throw PDHException(_T("Failed to initalize PdhCloseQuery :("));
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| 148 | return PDH::PDHError(pPdhCloseQuery(hQuery));
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| 149 | }
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| 150 | virtual PDHError PdhCollectQueryData(PDH_HQUERY hQuery) {
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| 151 | MutexLock lock(mutex_);
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| 152 | if (!lock.hasMutex())
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| 153 | throw PDHException(_T("Failed to get mutex for PdhCollectQueryData"));
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| 154 | if (pPdhCollectQueryData == NULL)
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| 155 | throw PDHException(_T("Failed to initalize PdhCollectQueryData :("));
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| 156 | return PDH::PDHError(pPdhCollectQueryData(hQuery));
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| 157 | }
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| 158 | virtual PDHError PdhValidatePath(LPCWSTR szFullPathBuffer, bool force_reload) {
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| 159 | MutexLock lock(mutex_);
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| 160 | if (!lock.hasMutex())
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| 161 | throw PDHException(_T("Failed to get mutex for PdhValidatePath"));
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| 162 | if (pPdhValidatePath == NULL)
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| 163 | throw PDHException(_T("Failed to initalize PdhValidatePath :("));
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| 164 | PDH::PDHError status = PDH::PDHError(pPdhValidatePath(szFullPathBuffer));
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| 165 | if (status.is_error() && force_reload) {
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| 166 | reload_unsafe();
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| 167 | status = PDH::PDHError(pPdhValidatePath(szFullPathBuffer));
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| 168 | }
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| 169 | return status;
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| 170 | }
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| 171 | virtual PDHError PdhEnumObjects(LPCWSTR szDataSource, LPCWSTR szMachineName, LPWSTR mszObjectList, LPDWORD pcchBufferSize, DWORD dwDetailLevel, BOOL bRefresh) {
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| 172 | MutexLock lock(mutex_);
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| 173 | if (!lock.hasMutex())
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| 174 | throw PDHException(_T("Failed to get mutex for PdhEnumObjects"));
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| 175 | if (pPdhEnumObjects == NULL)
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| 176 | throw PDHException(_T("Failed to initalize PdhEnumObjects :("));
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| 177 | return PDH::PDHError(pPdhEnumObjects(szDataSource, szMachineName, mszObjectList, pcchBufferSize, dwDetailLevel, bRefresh));
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| 178 | }
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| 179 | virtual PDHError PdhEnumObjectItems(LPCWSTR szDataSource, LPCWSTR szMachineName, LPCWSTR szObjectName, LPWSTR mszCounterList, LPDWORD pcchCounterListLength, LPWSTR mszInstanceList, LPDWORD pcchInstanceListLength, DWORD dwDetailLevel, DWORD dwFlags) {
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| 180 | MutexLock lock(mutex_);
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| 181 | if (!lock.hasMutex())
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| 182 | throw PDHException(_T("Failed to get mutex for PdhEnumObjectItems"));
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| 183 | if (pPdhEnumObjectItems == NULL)
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| 184 | throw PDHException(_T("Failed to initalize PdhEnumObjectItems :("));
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| 185 | return PDH::PDHError(pPdhEnumObjectItems(szDataSource, szMachineName, szObjectName, mszCounterList, pcchCounterListLength, mszInstanceList, pcchInstanceListLength, dwDetailLevel, dwFlags));
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| 186 | }
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| 187 | };
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| 188 | } |
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