/*++ Copyright (C) 1996-1999 Microsoft Corporation Module Name: perfutil.c Abstract: Performance registry interface functions --*/ #include #include #include #include #include "pdhitype.h" #include "pdhidef.h" #include "perfdata.h" #include "perftype.h" #include "pdhmsg.h" #include "strings.h" DWORD PdhiMakePerfLangId( IN LANGID lID, OUT LPWSTR szBuffer ); PPERF_MACHINE PdhiAddNewMachine ( IN PPERF_MACHINE pLastMachine, IN LPWSTR szMachineName ); PPERF_MACHINE pFirstMachine = NULL; PDH_STATUS ConnectMachine ( PPERF_MACHINE pThisMachine ) { PDH_STATUS pdhStatus; LONG lStatus = ERROR_SUCCESS; LONGLONG llCurrentTime; WCHAR szOsVer[8]; HKEY hKeyRemMachine; HKEY hKeyRemCurrentVersion; DWORD dwBufSize; DWORD dwType; BOOL bUpdateRetryTime = FALSE; DWORD dwReconnecting; if (pThisMachine == NULL) { pdhStatus = PDH_INVALID_ARGUMENT; } else { pdhStatus = WAIT_FOR_AND_LOCK_MUTEX(pThisMachine->hMutex); } if (pdhStatus == ERROR_SUCCESS) { // connect to system's performance registry if (lstrcmpiW(pThisMachine->szName, szStaticLocalMachineName) == 0) { // only one thread at a time can try to connect to a machine. pThisMachine->dwRefCount++; // assign default OS version // assume NT4 unless found otherwise lstrcpyW (pThisMachine->szOsVer, (LPCWSTR)L"4.0"); // this is the local machine so use the local reg key pThisMachine->hKeyPerformanceData = HKEY_PERFORMANCE_DATA; // look up the OS version and save it lStatus = RegOpenKeyExW ( HKEY_LOCAL_MACHINE, cszCurrentVersionKey, 0L, KEY_READ, &hKeyRemCurrentVersion); if (lStatus == ERROR_SUCCESS) { dwType=0; dwBufSize = sizeof (szOsVer); lStatus = RegQueryValueExW ( hKeyRemCurrentVersion, cszCurrentVersionValueName, 0L, &dwType, (LPBYTE)&szOsVer[0], &dwBufSize); if ((lStatus == ERROR_SUCCESS) && (dwType == REG_SZ)) { lstrcpyW(pThisMachine->szOsVer, szOsVer); } RegCloseKey (hKeyRemCurrentVersion); } } else { // now try to connect if the retry timeout has elapzed GetLocalFileTime (&llCurrentTime); dwReconnecting = (DWORD)InterlockedCompareExchange ( (PLONG)&pThisMachine->dwRetryFlags, TRUE, FALSE); if (!dwReconnecting) { if ((pThisMachine->llRetryTime == 0) || (pThisMachine->llRetryTime < llCurrentTime)) { // only one thread at a time can try to connect to a machine. pThisMachine->dwRefCount++; bUpdateRetryTime = TRUE; // only update after an attempt has been made __try { // close any open keys if (pThisMachine->hKeyPerformanceData != NULL) { RegCloseKey (pThisMachine->hKeyPerformanceData); pThisMachine->hKeyPerformanceData = NULL; } } __except (EXCEPTION_EXECUTE_HANDLER) { lStatus = GetExceptionCode(); } if (lStatus != ERROR_SUCCESS) { pThisMachine->hKeyPerformanceData = NULL; } else { // get OS version of remote machine lStatus = RegConnectRegistryW ( pThisMachine->szName, HKEY_LOCAL_MACHINE, &hKeyRemMachine); if (lStatus == ERROR_SUCCESS) { // look up the OS version and save it lStatus = RegOpenKeyExW ( hKeyRemMachine, cszCurrentVersionKey, 0L, KEY_READ, &hKeyRemCurrentVersion); if (lStatus == ERROR_SUCCESS) { dwType=0; dwBufSize = sizeof (szOsVer); lStatus = RegQueryValueExW ( hKeyRemCurrentVersion, cszCurrentVersionValueName, 0L, &dwType, (LPBYTE)&szOsVer[0], &dwBufSize); if ((lStatus == ERROR_SUCCESS) && (dwType == REG_SZ)) { lstrcpyW(pThisMachine->szOsVer, szOsVer); } RegCloseKey (hKeyRemCurrentVersion); } RegCloseKey (hKeyRemMachine); } } if (lStatus == ERROR_SUCCESS) { __try { // Connect to remote registry lStatus = RegConnectRegistryW ( pThisMachine->szName, HKEY_PERFORMANCE_DATA, &pThisMachine->hKeyPerformanceData); } __except (EXCEPTION_EXECUTE_HANDLER) { lStatus = GetExceptionCode(); } } // else pass error through } else { // not time to reconnect yet so save the old status and // clear the registry key pThisMachine->hKeyPerformanceData = NULL; lStatus = pThisMachine->dwStatus; } // clear the reconnecting flag InterlockedExchange ((LONG *)&pThisMachine->dwRetryFlags, FALSE); } else { // some other thread is trying to connect return (PDH_CANNOT_CONNECT_MACHINE); } } if ((pThisMachine->hKeyPerformanceData != NULL) && (pThisMachine->dwRetryFlags == 0)) { // successfully connected to computer's registry, so // get the performance names from that computer and cache them /* the shortcut of mapping local strings cannot be used reliably until more synchronization of the mapped file is implemented. Just Mapping to the file and not locking it or checking for updates leaves it vulnerable to the mapped file being changed by an external program and invalidating the pointer table built by the BuildLocalNameTable function. Until this synchronization and locking is implemented, the BuildLocalNameTable function should not be used. */ if (pThisMachine->hKeyPerformanceData != HKEY_PERFORMANCE_DATA) { if (pThisMachine->szPerfStrings != NULL) { // reload the perf strings, incase new ones have been // installed if ( pThisMachine->sz009PerfStrings != NULL && pThisMachine->sz009PerfStrings != pThisMachine->szPerfStrings) { G_FREE(pThisMachine->sz009PerfStrings); } if (pThisMachine->typePerfStrings) { G_FREE(pThisMachine->typePerfStrings); } G_FREE (pThisMachine->szPerfStrings); pThisMachine->sz009PerfStrings = NULL; pThisMachine->typePerfStrings = NULL; pThisMachine->szPerfStrings = NULL; } BuildNameTable(pThisMachine->szName, GetUserDefaultUILanguage(), pThisMachine); if (pThisMachine->szPerfStrings == NULL) { BuildNameTable(pThisMachine->szName, MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), pThisMachine); } } else { if (pThisMachine->szPerfStrings != NULL) { // reload the perf strings, incase new ones have been // installed if ( pThisMachine->sz009PerfStrings != NULL && pThisMachine->sz009PerfStrings != pThisMachine->szPerfStrings) { G_FREE(pThisMachine->sz009PerfStrings); } if (pThisMachine->typePerfStrings) { G_FREE(pThisMachine->typePerfStrings); } G_FREE (pThisMachine->szPerfStrings); pThisMachine->sz009PerfStrings = NULL; pThisMachine->typePerfStrings = NULL; pThisMachine->szPerfStrings = NULL; } BuildNameTable(NULL, GetUserDefaultUILanguage(), pThisMachine); if (pThisMachine->szPerfStrings == NULL) { BuildNameTable(NULL, MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), pThisMachine); } pThisMachine->pLocalNameInfo = NULL; } if (pThisMachine->szPerfStrings != NULL) { pdhStatus = ERROR_SUCCESS; pThisMachine->dwStatus = ERROR_SUCCESS; } else { // unable to read system counter name strings pdhStatus = PDH_CANNOT_READ_NAME_STRINGS; memset (&pThisMachine->LastStringUpdateTime, 0, sizeof(pThisMachine->LastStringUpdateTime)); pThisMachine->dwLastPerfString = 0; pThisMachine->dwStatus = PDH_CSTATUS_NO_MACHINE; } } else { // unable to connect to the specified machine pdhStatus = PDH_CANNOT_CONNECT_MACHINE; // Set error to either // "PDH_CSTATUS_NO_MACHINE" if no connection could be made // or // PDH_ACCESS_DENIED if ERROR_ACCESS_DENIED status is returned // since if ERROR_ACCESS_DENIED is returned, then reconnection will // probably be futile. if ((lStatus == ERROR_ACCESS_DENIED) || (lStatus == PDH_ACCESS_DENIED)) { pThisMachine->dwStatus = PDH_ACCESS_DENIED; } else { pThisMachine->dwStatus = PDH_CSTATUS_NO_MACHINE; } } if (pdhStatus != ERROR_SUCCESS) { if (bUpdateRetryTime) { // this attempt didn't work so reset retry counter to // wait some more for the machine to come back up. GetLocalFileTime (&llCurrentTime); pThisMachine->llRetryTime = llCurrentTime + llRemoteRetryTime; } } else { // clear the retry counter to allow function calls pThisMachine->llRetryTime = 0; } pThisMachine->dwRefCount--; RELEASE_MUTEX(pThisMachine->hMutex); } return pdhStatus; } PPERF_MACHINE PdhiAddNewMachine ( IN PPERF_MACHINE pLastMachine, IN LPWSTR szMachineName ) { PPERF_MACHINE pNewMachine = NULL; LPWSTR szNameBuffer = NULL; PERF_DATA_BLOCK *pdbBuffer = NULL; LPWSTR szIdList = NULL; DWORD dwNameSize = 0; BOOL bUseLocalName = TRUE; // reset the last error value SetLastError (ERROR_SUCCESS); if (szMachineName != NULL) { if (*szMachineName != 0) { bUseLocalName = FALSE; } } if (bUseLocalName) { dwNameSize = lstrlenW (szStaticLocalMachineName); } else { dwNameSize = lstrlenW (szMachineName); } dwNameSize += 1; dwNameSize *= sizeof (WCHAR); pNewMachine = (PPERF_MACHINE) G_ALLOC(sizeof(PERF_MACHINE) + SMALL_BUFFER_SIZE + (sizeof(WCHAR) * (dwNameSize + 1))); if (pNewMachine != NULL) { szIdList = (LPWSTR) ((LPBYTE) pNewMachine + sizeof(PERF_MACHINE)); szNameBuffer = (LPWSTR) ((LPBYTE) szIdList + SMALL_BUFFER_SIZE); pdbBuffer = G_ALLOC (LARGE_BUFFER_SIZE); if (pdbBuffer != NULL) { // initialize the new buffer pNewMachine->hKeyPerformanceData = NULL; pNewMachine->pLocalNameInfo = NULL; pNewMachine->szName = szNameBuffer; if (bUseLocalName) { lstrcpyW (pNewMachine->szName, szStaticLocalMachineName); } else { lstrcpyW (pNewMachine->szName, szMachineName); } pNewMachine->pSystemPerfData = pdbBuffer; pNewMachine->szPerfStrings = NULL; pNewMachine->sz009PerfStrings = NULL; pNewMachine->typePerfStrings = NULL; pNewMachine->dwLastPerfString = 0; pNewMachine->dwRefCount = 0; pNewMachine->szQueryObjects = szIdList; pNewMachine->dwStatus = PDH_CSTATUS_NO_MACHINE; // not connected yet pNewMachine->llRetryTime = 1; // retry connection immediately pNewMachine->dwRetryFlags = 0; // Not attempting a connection. pNewMachine->dwMachineFlags = 0; pNewMachine->hMutex = CreateMutex (NULL, FALSE, NULL); // everything went OK so far so add this entry to the list if (pLastMachine != NULL) { pNewMachine->pNext = pLastMachine->pNext; pLastMachine->pNext = pNewMachine; pNewMachine->pPrev = pLastMachine; pNewMachine->pNext->pPrev = pNewMachine; } else { // this is the first item in the list so it // points to itself pNewMachine->pNext = pNewMachine; pNewMachine->pPrev = pNewMachine; } return pNewMachine; } else { // unable to allocate perf data buffer SetLastError (PDH_MEMORY_ALLOCATION_FAILURE); // clean up and bail out. if (pNewMachine != NULL) { G_FREE (pNewMachine); } return NULL; } } else { // unable to allocate machine data memory SetLastError (PDH_MEMORY_ALLOCATION_FAILURE); // clean up and bail out. if (pNewMachine != NULL) { G_FREE (pNewMachine); } return NULL; } } PPERF_MACHINE GetMachineW ( IN LPWSTR szMachineName, IN DWORD dwFlags ) { PPERF_MACHINE pThisMachine = NULL; PPERF_MACHINE pLastMachine; BOOL bFound = FALSE; LPWSTR szFnMachineName; BOOL bNew = FALSE; // true if this is a new machine to the list BOOL bUseLocalName = TRUE; DWORD dwLocalStatus; // reset the last error value SetLastError (ERROR_SUCCESS); if (WAIT_FOR_AND_LOCK_MUTEX (hPdhDataMutex) == ERROR_SUCCESS) { if (szMachineName != NULL) { if (*szMachineName != 0) { bUseLocalName = FALSE; } } if (bUseLocalName) { szFnMachineName = szStaticLocalMachineName; } else { szFnMachineName = szMachineName; } // walk down list to find this machine pThisMachine = pFirstMachine; pLastMachine = NULL; // walk around entire list if (pThisMachine != NULL) { do { // walk down the list and look for a match if (lstrcmpiW(szFnMachineName, pThisMachine->szName) != 0) { pLastMachine = pThisMachine; pThisMachine = pThisMachine->pNext; } else { if (dwFlags & PDH_GM_UPDATE_NAME) { if (szMachineName != NULL) { // match found so update name string if a real string was passed in lstrcpyW (szMachineName, pThisMachine->szName); } } // and break now bFound = TRUE; break; } } while (pThisMachine != pFirstMachine); } // if thismachine == the first machine, then we couldn't find a match in // the list, if this machine is NULL, then there is no list if (!bFound) { // then this machine was not found so add it. pThisMachine = PdhiAddNewMachine ( pLastMachine, szFnMachineName); if (pThisMachine != NULL) { bNew = TRUE; if (pFirstMachine == NULL) { // then update the first pointer pFirstMachine = pThisMachine; } } } if (pThisMachine->dwThreadId != GetCurrentThreadId()) { dwFlags |= PDH_GM_UPDATE_PERFDATA; pThisMachine->dwThreadId = GetCurrentThreadId(); } if ((pThisMachine != NULL) && (((!bFound) || (dwFlags & PDH_GM_UPDATE_PERFDATA)) || (pThisMachine->dwStatus != ERROR_SUCCESS))) { // then this is a new machine // or // the caller wants the data refreshed // or // the machine has an entry, but is not yet on line // first try to connect to the machine // the call to ConnectMachine updates the machine status // so there's no need to keep it here. if (ConnectMachine (pThisMachine) == ERROR_SUCCESS) { // connected to the machine so // then lock access to it // the caller of this function must release the mutex dwLocalStatus = WAIT_FOR_AND_LOCK_MUTEX (pThisMachine->hMutex); if (dwLocalStatus == ERROR_SUCCESS) { // get the current system counter info pThisMachine->dwStatus = GetSystemPerfData ( pThisMachine->hKeyPerformanceData, &pThisMachine->pSystemPerfData, (LPWSTR)cszGlobal, (BOOL)(dwFlags & PDH_GM_READ_COSTLY_DATA) ); if ((dwFlags & PDH_GM_READ_COSTLY_DATA) && (pThisMachine->dwStatus == ERROR_SUCCESS)) { pThisMachine->dwMachineFlags |= PDHIPM_FLAGS_HAVE_COSTLY; } else { pThisMachine->dwMachineFlags &= ~PDHIPM_FLAGS_HAVE_COSTLY; } SetLastError (pThisMachine->dwStatus); } else { pThisMachine = NULL; SetLastError (WAIT_TIMEOUT); } } else { SetLastError (pThisMachine->dwStatus); } } if (pThisMachine != NULL) { // machine found so bump the ref count // NOTE!!! the caller must release this!!! pThisMachine->dwRefCount++; } // at this point if pThisMachine is NULL then it was not found, nor // could it be added otherwise it is pointing to the matching machine // structure RELEASE_MUTEX (hPdhDataMutex); } else { SetLastError (WAIT_TIMEOUT); } return pThisMachine; } BOOL FreeMachine ( PPERF_MACHINE pMachine, BOOL bForceRelease, BOOL bProcessExit ) { PPERF_MACHINE pPrev; PPERF_MACHINE pNext; HANDLE hMutex; // unlink if this isn't the only one in the list if ((!bForceRelease) && (pMachine->dwRefCount)) return FALSE; hMutex = pMachine->hMutex; if (WAIT_FOR_AND_LOCK_MUTEX (hMutex) != ERROR_SUCCESS) { SetLastError(WAIT_TIMEOUT); return FALSE; } pPrev = pMachine->pPrev; pNext = pMachine->pNext; if ((pPrev != pMachine) && (pNext != pMachine)) { // this is not the only entry in the list pPrev->pNext = pNext; pNext->pPrev = pPrev; if (pMachine == pFirstMachine) { // then we are deleting the first one in the list so // update the list head to point to the next one in line pFirstMachine = pNext; } } else { // this is the only entry so clear the head pointer pFirstMachine = NULL; } // now free all allocated memory if (pMachine->pSystemPerfData != NULL) { G_FREE (pMachine->pSystemPerfData); } if (pMachine->typePerfStrings != NULL) { G_FREE (pMachine->typePerfStrings); } if ( pMachine->sz009PerfStrings != NULL && pMachine->sz009PerfStrings != pMachine->szPerfStrings) { G_FREE (pMachine->sz009PerfStrings); } if (pMachine->szPerfStrings != NULL) { G_FREE (pMachine->szPerfStrings); } // close key if (pMachine->hKeyPerformanceData != NULL) { if ( (! bProcessExit) || pMachine->hKeyPerformanceData != HKEY_PERFORMANCE_DATA) { RegCloseKey (pMachine->hKeyPerformanceData); } pMachine->hKeyPerformanceData = NULL; } // free memory block G_FREE (pMachine); // release and close mutex RELEASE_MUTEX (hMutex); if (hMutex != NULL) { CloseHandle (hMutex); } return TRUE; } BOOL FreeAllMachines ( BOOL bProcessExit ) { PPERF_MACHINE pThisMachine; // free any machines in the machine list if (pFirstMachine != NULL) { if (WAIT_FOR_AND_LOCK_MUTEX (hPdhDataMutex) == ERROR_SUCCESS) { pThisMachine = pFirstMachine; while (pFirstMachine != pFirstMachine->pNext) { // delete from list // the deletion routine updates the prev pointer as it // removes the specified entry. FreeMachine (pThisMachine->pPrev, TRUE, bProcessExit); if (pFirstMachine == NULL) break; } // remove last query if (pFirstMachine) FreeMachine (pFirstMachine, TRUE, bProcessExit); pFirstMachine = NULL; RELEASE_MUTEX (hPdhDataMutex); } else { SetLastError (WAIT_TIMEOUT); return FALSE; } } return TRUE; } DWORD GetObjectId ( IN PPERF_MACHINE pMachine, IN LPWSTR szObjectName, IN BOOL *bInstances ) { PERF_OBJECT_TYPE * pObject; pObject = GetObjectDefByName ( pMachine->pSystemPerfData, pMachine->dwLastPerfString, pMachine->szPerfStrings, szObjectName); if (pObject != NULL) { // copy name string LPCWSTR szTmpObjectName = PdhiLookupPerfNameByIndex( pMachine, pObject->ObjectNameTitleIndex); if (szObjectName != NULL && szTmpObjectName != NULL) { lstrcpyW (szObjectName, szTmpObjectName); } if (bInstances != NULL) { *bInstances = (pObject->NumInstances != PERF_NO_INSTANCES ? TRUE : FALSE); } return pObject->ObjectNameTitleIndex; } else { return (DWORD)-1; } } DWORD GetCounterId ( PPERF_MACHINE pMachine, DWORD dwObjectId, LPWSTR szCounterName ) { PERF_OBJECT_TYPE *pObject; PERF_COUNTER_DEFINITION *pCounter; pObject = GetObjectDefByTitleIndex( pMachine->pSystemPerfData, dwObjectId); if (pObject != NULL) { pCounter = GetCounterDefByName ( pObject, pMachine->dwLastPerfString, pMachine->szPerfStrings, szCounterName); if (pCounter != NULL) { // update counter name string LPCWSTR szTmpCounterName = PdhiLookupPerfNameByIndex( pMachine, pCounter->CounterNameTitleIndex); if (szCounterName != NULL && szTmpCounterName != NULL) { lstrcpyW (szCounterName, szTmpCounterName); } return pCounter->CounterNameTitleIndex; } else { return (DWORD)-1; } } else { return (DWORD)-1; } } BOOL InitPerflibCounterInfo ( IN PPDHI_COUNTER pCounter ) /*++ Routine Description: Initializes the perflib related fields of the counter structure Arguments: IN PPDHI_COUNTER pCounter pointer to the counter structure to initialize Return Value: TRUE --*/ { PERF_OBJECT_TYPE *pPerfObject = NULL; PERF_COUNTER_DEFINITION *pPerfCounter = NULL; if (pCounter->pQMachine->pMachine == NULL) { pCounter->ThisValue.CStatus = PDH_CSTATUS_NO_MACHINE; return FALSE; } else if (pCounter->pQMachine->pMachine->dwStatus != ERROR_SUCCESS) { // machine not initialized return FALSE; } // get perf object definition from system data structure pPerfObject = GetObjectDefByTitleIndex ( pCounter->pQMachine->pMachine->pSystemPerfData, pCounter->plCounterInfo.dwObjectId); if (pPerfObject != NULL) { // object was found now look up counter definition pPerfCounter = GetCounterDefByTitleIndex (pPerfObject, 0, pCounter->plCounterInfo.dwCounterId); if (pPerfCounter != NULL) { // get system perf data info // (pack into a DWORD) pCounter->CVersion = pCounter->pQMachine->pMachine->pSystemPerfData->Version; pCounter->CVersion &= 0x0000FFFF; pCounter->CVersion <<= 16; pCounter->CVersion &= 0xFFFF0000; pCounter->CVersion |= (pCounter->pQMachine->pMachine->pSystemPerfData->Revision & 0x0000FFFF); // get the counter's time base if (pPerfCounter->CounterType & PERF_TIMER_100NS) { pCounter->TimeBase = (LONGLONG)10000000; } else if (pPerfCounter->CounterType & PERF_OBJECT_TIMER) { // then get the time base freq from the object pCounter->TimeBase = pPerfObject->PerfFreq.QuadPart; } else { // if (pPerfCounter->CounterType & PERF_TIMER_TICK or other) pCounter->TimeBase = pCounter->pQMachine->pMachine->pSystemPerfData->PerfFreq.QuadPart; } // look up info from counter definition pCounter->plCounterInfo.dwCounterType = pPerfCounter->CounterType; pCounter->plCounterInfo.dwCounterSize = pPerfCounter->CounterSize; pCounter->plCounterInfo.lDefaultScale = pPerfCounter->DefaultScale; // // get explain text pointer pCounter->szExplainText = (LPWSTR)PdhiLookupPerfNameByIndex ( pCounter->pQMachine->pMachine, pPerfCounter->CounterHelpTitleIndex); // // now clear/initialize the raw counter info // pCounter->ThisValue.TimeStamp.dwLowDateTime = 0; pCounter->ThisValue.TimeStamp.dwHighDateTime = 0; pCounter->ThisValue.MultiCount = 1; pCounter->ThisValue.FirstValue = 0; pCounter->ThisValue.SecondValue = 0; // pCounter->LastValue.TimeStamp.dwLowDateTime = 0; pCounter->LastValue.TimeStamp.dwHighDateTime = 0; pCounter->LastValue.MultiCount = 1; pCounter->LastValue.FirstValue = 0; pCounter->LastValue.SecondValue = 0; // // clear data array pointers // pCounter->pThisRawItemList = NULL; pCounter->pLastRawItemList = NULL; // // lastly update status // if (pCounter->ThisValue.CStatus == 0) { // don't overwrite any other status values pCounter->ThisValue.CStatus = PDH_CSTATUS_VALID_DATA; } return TRUE; } else { // unable to find counter pCounter->ThisValue.CStatus = PDH_CSTATUS_NO_COUNTER; return FALSE; } } else { // unable to find object pCounter->ThisValue.CStatus = PDH_CSTATUS_NO_OBJECT; return FALSE; } } #pragma warning ( disable : 4127 ) STATIC_BOOL IsNumberInUnicodeList ( IN DWORD dwNumber, IN LPWSTR lpwszUnicodeList ) /*++ IsNumberInUnicodeList Arguments: IN dwNumber DWORD number to find in list IN lpwszUnicodeList Null terminated, Space delimited list of decimal numbers Return Value: TRUE: dwNumber was found in the list of unicode number strings FALSE: dwNumber was not found in the list. --*/ { DWORD dwThisNumber; WCHAR *pwcThisChar; BOOL bValidNumber; BOOL bNewItem; WCHAR wcDelimiter; // could be an argument to be more flexible if (lpwszUnicodeList == 0) return FALSE; // null pointer, # not founde pwcThisChar = lpwszUnicodeList; dwThisNumber = 0; wcDelimiter = SPACE_L; bValidNumber = FALSE; bNewItem = TRUE; while (TRUE) { switch (EvalThisChar (*pwcThisChar, wcDelimiter)) { case DIGIT: // if this is the first digit after a delimiter, then // set flags to start computing the new number if (bNewItem) { bNewItem = FALSE; bValidNumber = TRUE; } if (bValidNumber) { dwThisNumber *= 10; dwThisNumber += (*pwcThisChar - (WCHAR)'0'); } break; case DELIMITER: // a delimter is either the delimiter character or the // end of the string ('\0') if when the delimiter has been // reached a valid number was found, then compare it to the // number from the argument list. if this is the end of the // string and no match was found, then return. // if (bValidNumber) { if (dwThisNumber == dwNumber) return TRUE; bValidNumber = FALSE; } if (*pwcThisChar == 0) { return FALSE; } else { bNewItem = TRUE; dwThisNumber = 0; } break; case INVALID: // if an invalid character was encountered, ignore all // characters up to the next delimiter and then start fresh. // the invalid number is not compared. bValidNumber = FALSE; break; default: break; } pwcThisChar++; } } // IsNumberInUnicodeList #pragma warning ( default : 4127 ) BOOL AppendObjectToValueList ( DWORD dwObjectId, PWSTR pwszValueList ) /*++ AppendObjectToValueList Arguments: IN dwNumber DWORD number to insert in list IN PWSTR pointer to wide char string that contains buffer that is Null terminated, Space delimited list of decimal numbers that may have this number appended to. Return Value: TRUE: dwNumber was added to list FALSE: dwNumber was not added. (because it's already there or an error occured) --*/ { WCHAR tempString [16] ; BOOL bReturn = FALSE; LPWSTR szFormatString; if (!pwszValueList) { bReturn = FALSE; } else if (IsNumberInUnicodeList(dwObjectId, pwszValueList)) { bReturn = FALSE; // object already in list } else { __try { if (*pwszValueList == 0) { // then this is the first string so no delimiter szFormatString = (LPWSTR)fmtDecimal; } else { // this is being added to the end so include the delimiter szFormatString = (LPWSTR)fmtSpaceDecimal; } // format number and append the new object id the value list swprintf (tempString, szFormatString, dwObjectId) ; lstrcatW (pwszValueList, tempString); bReturn = TRUE; } __except (EXCEPTION_EXECUTE_HANDLER) { bReturn = FALSE; } } return bReturn; } BOOL GetInstanceByNameMatch ( IN PPERF_MACHINE pMachine, IN PPDHI_COUNTER pCounter ) { PPERF_INSTANCE_DEFINITION pInstanceDef; PPERF_OBJECT_TYPE pObjectDef; LONG lInstanceId = PERF_NO_UNIQUE_ID; // get the instances object pObjectDef = GetObjectDefByTitleIndex( pMachine->pSystemPerfData, pCounter->plCounterInfo.dwObjectId); if (pObjectDef != NULL) { pInstanceDef = FirstInstance (pObjectDef); if (pInstanceDef->UniqueID == PERF_NO_UNIQUE_ID) { // get instance in that object by comparing names // if there is no parent specified, then just look it up by name pInstanceDef = GetInstanceByName ( pMachine->pSystemPerfData, pObjectDef, pCounter->pCounterPath->szInstanceName, pCounter->pCounterPath->szParentName, pCounter->pCounterPath->dwIndex); } else { // get numeric equivalent of Instance ID if (pCounter->pCounterPath->szInstanceName != NULL) { lInstanceId = wcstol ( pCounter->pCounterPath->szInstanceName, NULL, 10); } pInstanceDef = GetInstanceByUniqueId ( pObjectDef, lInstanceId); } // update counter fields pCounter->plCounterInfo.lInstanceId = lInstanceId; if (lInstanceId == -1) { // use instance NAME // GetInstanceNameStr (pInstanceDef, // pCounter->pCounterPath->szInstanceName, // pObjectDef->CodePage); pCounter->plCounterInfo.szInstanceName = pCounter->pCounterPath->szInstanceName; pCounter->plCounterInfo.szParentInstanceName = pCounter->pCounterPath->szParentName; } else { // use instance ID number pCounter->plCounterInfo.szInstanceName = NULL; pCounter->plCounterInfo.szParentInstanceName = NULL; } if (pInstanceDef != NULL) { // instance found return TRUE; } else { // unable to find instance return FALSE; } } else { return FALSE; } } BOOL GetObjectPerfInfo ( IN PPERF_DATA_BLOCK pPerfData, IN DWORD dwObjectId, IN LONGLONG *pPerfTime, IN LONGLONG *pPerfFreq ) { PERF_OBJECT_TYPE * pObject; BOOL bReturn = FALSE; pObject = GetObjectDefByTitleIndex (pPerfData, dwObjectId); if (pObject != NULL) { __try { *pPerfTime = pObject->PerfTime.QuadPart; *pPerfFreq = pObject->PerfFreq.QuadPart; bReturn = TRUE; } __except (EXCEPTION_EXECUTE_HANDLER) { bReturn = FALSE; } } return bReturn; } PDH_STATUS ValidateMachineConnection ( IN PPERF_MACHINE pMachine ) { PDH_STATUS pdhStatus; HANDLE hThread; DWORD ThreadId; DWORD dwWaitStatus; DWORD dwReconnecting; LONGLONG llCurrentTime; // if a connection or request has failed, this will be // set to an error status if (pMachine != NULL) { if (pMachine->dwStatus != ERROR_SUCCESS) { // get the current time GetLocalFileTime (&llCurrentTime); if (pMachine->llRetryTime < llCurrentTime) { if (pMachine->llRetryTime != 0) { // see what's up by trying to reconnect // dwReconnecting = (DWORD)InterlockedCompareExchange ( // (PLONG)&pMachine->dwRetryFlags, TRUE, FALSE); dwReconnecting = pMachine->dwRetryFlags; if (!dwReconnecting) { // start another thread to connect to the machine then // wait for the thread to return. If it returns in time, then // use it, otherwise indicate it's not available and continue hThread = CreateThread ( NULL, 0, (LPTHREAD_START_ROUTINE)ConnectMachine, (LPVOID)pMachine, 0, &ThreadId); if (hThread != NULL) { // wait for the thread to complete or the timeout to expire dwWaitStatus = WaitForSingleObject (hThread, 500); if (dwWaitStatus == WAIT_TIMEOUT) { // then this is taking too long so set an error and // continue. If the machine is off line, then the // thread will eventually complete and the machine // status will indicate that it's offline. If the // machine connects after the timeout, it'll be // picked up on the next scan. pdhStatus = PDH_CSTATUS_NO_MACHINE; } else { // get the thread's exit code GetExitCodeThread (hThread, (LPDWORD)&pdhStatus); } CloseHandle (hThread); } else { // unable to creat thread to connect to machine // so return not available status pdhStatus = PDH_CANNOT_CONNECT_MACHINE; } } else { // a connection attempt is in process so do nothing here pdhStatus = PDH_CANNOT_CONNECT_MACHINE; } } else { // everything's fine pdhStatus = ERROR_SUCCESS; } } else { // it's not retry time, yet so machine is off line still pdhStatus = PDH_CSTATUS_NO_MACHINE; } } else { // everything's fine pdhStatus = ERROR_SUCCESS; } } else { pdhStatus = PDH_CSTATUS_NO_MACHINE; } return pdhStatus; }