pdh_error ThreadedSafePDH::PdhOpenQuery(LPCWSTR szDataSource, DWORD_PTR dwUserData, PDH::PDH_HQUERY * phQuery) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhOpenQuery");
if (pPdhOpenQuery == NULL)
throw pdh_exception("Failed to initialize PdhOpenQuery :(");
return pdh_error(pPdhOpenQuery(szDataSource, dwUserData, phQuery));
}
pdh_error ThreadedSafePDH::PdhAddCounter(PDH::PDH_HQUERY hQuery, LPCWSTR szFullCounterPath, DWORD_PTR dwUserData, PDH::PDH_HCOUNTER * phCounter) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhAddCounter");
if (pPdhAddCounter == NULL)
throw pdh_exception("Failed to initialize PdhAddCounter :(");
return pdh_error(pPdhAddCounter(hQuery,szFullCounterPath,dwUserData,phCounter));
}
pdh_error ThreadedSafePDH::PdhEnumObjectItems(LPCWSTR szDataSource, LPCWSTR szMachineName, LPCWSTR szObjectName, LPWSTR mszCounterList, LPDWORD pcchCounterListLength, LPWSTR mszInstanceList, LPDWORD pcchInstanceListLength, DWORD dwDetailLevel, DWORD dwFlags) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhEnumObjectItems");
if (pPdhEnumObjectItems == NULL)
throw pdh_exception("Failed to initialize PdhEnumObjectItems :(");
return pdh_error(pPdhEnumObjectItems(szDataSource, szMachineName, szObjectName, mszCounterList, pcchCounterListLength, mszInstanceList, pcchInstanceListLength, dwDetailLevel, dwFlags));
}
pdh_error ThreadedSafePDH::PdhExpandCounterPath(LPCTSTR szWildCardPath, LPTSTR mszExpandedPathList, LPDWORD pcchPathListLength) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhExpandCounterPath");
if (pPdhExpandCounterPath == NULL)
throw pdh_exception("Failed to initialize PdhLookupPerfNameByIndex :(");
return pdh_error(pPdhExpandCounterPath(szWildCardPath,mszExpandedPathList,pcchPathListLength));
}
pdh_error ThreadedSafePDH::PdhEnumObjects(LPCWSTR szDataSource, LPCWSTR szMachineName, LPWSTR mszObjectList, LPDWORD pcchBufferSize, DWORD dwDetailLevel, BOOL bRefresh) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhEnumObjects");
if (pPdhEnumObjects == NULL)
throw pdh_exception("Failed to initialize PdhEnumObjects :(");
return pdh_error(pPdhEnumObjects(szDataSource, szMachineName, mszObjectList, pcchBufferSize, dwDetailLevel, bRefresh));
}
pdh_error ThreadedSafePDH::PdhLookupPerfNameByIndex(LPCTSTR szMachineName,DWORD dwNameIndex,LPTSTR szNameBuffer,LPDWORD pcchNameBufferSize) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhLookupPerfNameByIndex");
if (pPdhLookupPerfNameByIndex == NULL)
throw pdh_exception("Failed to initialize PdhLookupPerfNameByIndex :(");
return pdh_error(pPdhLookupPerfNameByIndex(szMachineName,dwNameIndex,szNameBuffer,pcchNameBufferSize));
}
pdh_error ThreadedSafePDH::PdhRemoveCounter(PDH::PDH_HCOUNTER hCounter) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhRemoveCounter");
if (pPdhRemoveCounter == NULL)
throw pdh_exception("Failed to initialize PdhRemoveCounter :(");
return pdh_error(pPdhRemoveCounter(hCounter));
}
pdh_error ThreadedSafePDH::PdhGetFormattedCounterValue(PDH_HCOUNTER hCounter, DWORD dwFormat, LPDWORD lpdwType, PPDH_FMT_COUNTERVALUE pValue) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhGetFormattedCounterValue");
if (pPdhGetFormattedCounterValue == NULL)
throw pdh_exception("Failed to initialize PdhGetFormattedCounterValue :(");
return pdh_error(pPdhGetFormattedCounterValue(hCounter, dwFormat, lpdwType, pValue));
}
pdh_error ThreadedSafePDH::PdhGetCounterInfo(PDH::PDH_HCOUNTER hCounter, BOOLEAN bRetrieveExplainText, LPDWORD pdwBufferSize, PDH_COUNTER_INFO *lpBuffer) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhGetCounterInfo");
if (pPdhGetCounterInfo == NULL)
throw pdh_exception("Failed to initialize PdhGetCounterInfo :(");
return pdh_error(pPdhGetCounterInfo(hCounter,bRetrieveExplainText,pdwBufferSize,lpBuffer));
}
virtual PDHError PdhCloseQuery(PDH_HQUERY hQuery) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhCloseQuery");
if (pPdhCloseQuery == NULL)
throw pdh_exception("Failed to initialize PdhCloseQuery :(");
return PDH::PDHError(pPdhCloseQuery(hQuery));
}
pdh_error ThreadedSafePDH::PdhLookupPerfIndexByName(LPCTSTR szMachineName,LPCTSTR szName,DWORD *dwIndex) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhLookupPerfIndexByName");
if (pPdhLookupPerfIndexByName == NULL)
throw pdh_exception("Failed to initialize PdhLookupPerfIndexByName");
return pdh_error(pPdhLookupPerfIndexByName(szMachineName,szName,dwIndex));
}
pdh_error ThreadedSafePDH::PdhCollectQueryData(PDH_HQUERY hQuery) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhCollectQueryData");
if (pPdhCollectQueryData == NULL)
throw pdh_exception("Failed to initialize PdhCollectQueryData :(");
return pdh_error(pPdhCollectQueryData(hQuery));
}
counter_info PDHCounter::getCounterInfo(BOOL bExplainText) {
if (hCounter_ == NULL)
throw pdh_exception("Counter is null!");
BYTE *lpBuffer = new BYTE[1025];
DWORD bufSize = 1024;
pdh_error status = factory::get_impl()->PdhGetCounterInfo(hCounter_, bExplainText, &bufSize, (PDH_COUNTER_INFO*)lpBuffer);
if (status.is_error())
throw pdh_exception(getName() + " getCounterInfo failed (no query)", status);
return counter_info(lpBuffer, bufSize, TRUE);
}
pdh_error ThreadedSafePDH::PdhValidatePath(LPCWSTR szFullPathBuffer, bool force_reload) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for PdhValidatePath");
if (pPdhValidatePath == NULL)
throw pdh_exception("Failed to initialize PdhValidatePath :(");
pdh_error status = pdh_error(pPdhValidatePath(szFullPathBuffer));
if (status.is_error() && force_reload) {
reload_unsafe();
status = pdh_error(pPdhValidatePath(szFullPathBuffer));
}
return status;
}
void close() {
if (hQuery_ == NULL)
throw pdh_exception("query is null!");
PDH::PDHFactory::get_impl()->remove_listener(this);
on_unload();
counters_.clear();
}
void PDHCounter::remove() {
if (hCounter_ == NULL)
return;
pdh_error status = factory::get_impl()->PdhRemoveCounter(hCounter_);
if (status.is_error())
throw pdh_exception(getName() + " PdhRemoveCounter failed", status);
hCounter_ = NULL;
}
void PDHCounter::addToQuery(PDH::PDH_HQUERY hQuery) {
if (hQuery == NULL)
throw pdh_exception(getName(), "addToQuery failed (no query).");
if (hCounter_ != NULL)
throw pdh_exception(getName(), "addToQuery failed (already opened).");
pdh_error status = factory::get_impl()->PdhAddCounter(hQuery, utf8::cvt<std::wstring>(counter_->get_counter()).c_str(), 0, &hCounter_);
if (status.is_not_found()) {
hCounter_ = NULL;
status = factory::get_impl()->PdhAddEnglishCounter(hQuery, utf8::cvt<std::wstring>(counter_->get_counter()).c_str(), 0, &hCounter_);
}
if (status.is_error()) {
hCounter_ = NULL;
throw pdh_exception(getName() + " PdhAddCounter failed", status);
}
if (hCounter_ == NULL)
throw pdh_exception("Counter is null!");
}
void gatherData() {
collect();
for (CounterList::iterator it = counters_.begin(); it != counters_.end(); it++) {
PDH::PDHError status = (*it)->collect();
if (status.is_negative_denominator()) {
Sleep(500);
collect();
status = (*it)->collect();
}
if (status.is_negative_denominator()) {
if (!hasDisplayedInvalidCOunter_) {
hasDisplayedInvalidCOunter_ = true;
throw pdh_exception((*it)->getName(), "Negative denominator issue (check FAQ for ways to solve this): ", status);
}
} else if (status.is_error()) {
throw pdh_exception((*it)->getName(), "Failed to poll counter", status);
}
}
}
virtual void on_reload() {
if (hQuery_ != NULL)
return;
PDH::PDHError status = PDH::PDHFactory::get_impl()->PdhOpenQuery( NULL, 0, &hQuery_ );
if (status.is_error())
throw pdh_exception("PdhOpenQuery failed", status);
for (CounterList::iterator it = counters_.begin(); it != counters_.end(); it++) {
(*it)->addToQuery(getQueryHandle());
}
}
virtual void on_unload() {
if (hQuery_ == NULL)
return;
for (CounterList::iterator it = counters_.begin(); it != counters_.end(); it++) {
(*it)->remove();
}
PDH::PDHError status = PDH::PDHFactory::get_impl()->PdhCloseQuery(hQuery_);
if (status.is_error())
throw pdh_exception("PdhCloseQuery failed", status);
hQuery_ = NULL;
}
void ThreadedSafePDH::remove_listener(subscriber* sub) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for reload");
for(subscriber_list::iterator it = subscribers_.begin(); it != subscribers_.end(); ++it) {
if ( (*it) == sub)
it = subscribers_.erase(it);
if (it == subscribers_.end())
break;
}
}
inline void collect() {
PDH::PDHError status = PDH::PDHFactory::get_impl()->PdhCollectQueryData(hQuery_);
if (status.is_error())
throw pdh_exception("PdhCollectQueryData failed: ", status);
}
virtual void add_listener(PDHImplSubscriber* sub) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for reload");
subscribers_.push_back(sub);
}
void open() {
if (hQuery_ != NULL)
throw pdh_exception("query is not null!");
PDH::PDHFactory::get_impl()->add_listener(this);
on_reload();
}
bool ThreadedSafePDH::reload() {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for reload");
return reload_unsafe();
}
void ThreadedSafePDH::add_listener(subscriber* sub) {
boost::unique_lock<boost::shared_mutex> lock(mutex_);
if (!lock.owns_lock())
throw pdh_exception("Failed to get mutex for reload");
subscribers_.push_back(sub);
}
