QString str = QString::number(dwObjectIndex);
wchar_t* keyName = new wchar_t[str.length()];
str.toWCharArray(keyName);
В чём может быть ошибка?
Всем привет!
Вот 2ой день разбираюсь с CpuUsage (Qt + WinApi)
Наконец-то при сборке нет ошибок
Но толку мало
Есть код:
В Visual Studio он выполняется, само собой, корректно, и в результате выполнения
pPerfData->TotalByteLength = 1232
и
pPerfData->NumObjectTypes = 1
Как и должно быть
Чтобы этот код работал в Qt, я его немного подправил:
В итоге, код стал отрабатывать неправильно
Важные значения
pPerfData->TotalByteLength = 104
и
pPerfData->NumObjectTypes = 0
Через Watch смотрел все переменные - значения те же
НО - работает по-другому
Может кто-то может сказать, что я в чём-то ошибся, или что-то сделал некорректно?
Буду благодарен за любые советы!
Вот 2ой день разбираюсь с CpuUsage (Qt + WinApi)
Наконец-то при сборке нет ошибок
Но толку мало
Есть код:
Код:
//
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex, DWORD dwCounterIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
char keyName[32];
sprintf(keyName,"%d",dwObjectIndex);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
keyName,
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex, DWORD dwCounterIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
char keyName[32];
sprintf(keyName,"%d",dwObjectIndex);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
keyName,
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
В Visual Studio он выполняется, само собой, корректно, и в результате выполнения
pPerfData->TotalByteLength = 1232
и
pPerfData->NumObjectTypes = 1
Как и должно быть
Чтобы этот код работал в Qt, я его немного подправил:
Код:
//
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
QString str = QString::number(dwObjectIndex);
wchar_t* keyName = new wchar_t[str.length()];
str.toWCharArray(keyName);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
keyName,
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
QString str = QString::number(dwObjectIndex);
wchar_t* keyName = new wchar_t[str.length()];
str.toWCharArray(keyName);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
keyName,
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
В итоге, код стал отрабатывать неправильно
Важные значения
pPerfData->TotalByteLength = 104
и
pPerfData->NumObjectTypes = 0
Через Watch смотрел все переменные - значения те же
НО - работает по-другому
Может кто-то может сказать, что я в чём-то ошибся, или что-то сделал некорректно?
Буду благодарен за любые советы!
Попробуй
Или
И чему у тебя равно TOTALBYTES?
Код:
#ifndef Q_OS_WIN
#error Windows only
#endif
//
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
QString str = QString::number(dwObjectIndex);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
(wchar_t*)str.utf16(),
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
#error Windows only
#endif
//
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
QString str = QString::number(dwObjectIndex);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
(wchar_t*)str.utf16(),
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
Или
Код:
#ifndef Q_OS_WIN
#error Windows only
#endif
//
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
QString str = QString::number(dwObjectIndex);
wchar_t* keyName = new wchar_t[str.length()+1];
keyName[str.length()] = 0;
str.toWCharArray(keyName);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
keyName,
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
#error Windows only
#endif
//
// The performance data is accessed through the registry key
// HKEY_PEFORMANCE_DATA.
// However, although we use the registry to collect performance data,
// the data is not stored in the registry database.
// Instead, calling the registry functions with the HKEY_PEFORMANCE_DATA key
// causes the system to collect the data from the appropriate system
// object managers.
//
// QueryPerformanceData allocates memory block for getting the
// performance data.
//
//
void QueryPerformanceData(PERF_DATA_BLOCK **pPerfData, DWORD dwObjectIndex) {
//
// Since i want to use the same allocated area for each query,
// i declare CBuffer as static.
// The allocated is changed only when RegQueryValueEx return ERROR_MORE_DATA
//
static CBuffer Buffer(TOTALBYTES);
DWORD BufferSize = Buffer.GetSize();
LONG lRes;
QString str = QString::number(dwObjectIndex);
wchar_t* keyName = new wchar_t[str.length()+1];
keyName[str.length()] = 0;
str.toWCharArray(keyName);
Buffer.Reset();
while( (lRes = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
keyName,
NULL,
NULL,
Buffer,
&BufferSize )) == ERROR_MORE_DATA ) {
// Get a buffer that is big enough.
BufferSize += BYTEINCREMENT;
Buffer.Realloc(BufferSize);
}
*pPerfData = (PPERF_DATA_BLOCK) Buffer.m_pBuffer;
}
И чему у тебя равно TOTALBYTES?
ДА! Я как раз так же написал, как и ты, и это кусок заработал:)
Спасибо большое, прям респект тебе:)
Спасибо большое, прям респект тебе:)
Я бы обратил внимание на этот фрагмент кода.
Вероятно читаются не те данные.
Код:
Вероятно читаются не те данные.
Ну всё, вопрос решён
Дело был в том, что не проставлял завершающий 0
В итоге получилось:
Дело был в том, что не проставлял завершающий 0
Код:
QString str = QString::number(dwObjectIndex);
wchar_t* keyName = new wchar_t[str.length()];
str.toWCharArray(keyName);
wchar_t* keyName = new wchar_t[str.length()];
str.toWCharArray(keyName);
В итоге получилось:
Код:
QString str = QString::number(dwObjectIndex);
wchar_t* keyName = new wchar_t[str.length() + 1];
str.toWCharArray(keyName);
keyName[str.length()] = '\0';
wchar_t* keyName = new wchar_t[str.length() + 1];
str.toWCharArray(keyName);
keyName[str.length()] = '\0';