Applies to: desktop apps only
Retrieves timing information for the specified process.
Syntax
BOOL WINAPI GetProcessTimes( __in HANDLE hProcess, __out LPFILETIME lpCreationTime, __out LPFILETIME lpExitTime, __out LPFILETIME lpKernelTime, __out LPFILETIME lpUserTime );
Parameters
- hProcess [in]
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A handle to the process whose timing information is sought. The handle must have the PROCESS_QUERY_INFORMATION or PROCESS_QUERY_LIMITED_INFORMATION access right. For more information, see Process Security and Access Rights.
Windows Server 2003 and Windows XP: The handle must have the PROCESS_QUERY_INFORMATION access right. - lpCreationTime [out]
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A pointer to a FILETIME structure that receives the creation time of the process.
- lpExitTime [out]
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A pointer to a FILETIME structure that receives the exit time of the process. If the process has not exited, the content of this structure is undefined.
- lpKernelTime [out]
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A pointer to a FILETIME structure that receives the amount of time that the process has executed in kernel mode. The time that each of the threads of the process has executed in kernel mode is determined, and then all of those times are summed together to obtain this value.
- lpUserTime [out]
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A pointer to a FILETIME structure that receives the amount of time that the process has executed in user mode. The time that each of the threads of the process has executed in user mode is determined, and then all of those times are summed together to obtain this value.
Return value
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Remarks
All times are expressed using FILETIME data structures. Such a structure contains two 32-bit values that combine to form a 64-bit count of 100-nanosecond time units.
Process creation and exit times are points in time expressed as the amount of time that has elapsed since midnight on January 1, 1601 at Greenwich, England. There are several functions that an application can use to convert such values to more generally useful forms.
Process kernel mode and user mode times are amounts of time. For example, if a process has spent one second in kernel mode, this function will fill the FILETIME structure specified by lpKernelTime with a 64-bit value of ten million. That is the number of 100-nanosecond units in one second.
To retrieve the number of CPU clock cycles used by the threads of the process, use the QueryProcessCycleTime function.
Requirements
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Minimum supported client | Windows XP |
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Minimum supported server | Windows Server 2003 |
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Header |
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Library |
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DLL |
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See also
- FILETIME
- FileTimeToDosDateTime
- FileTimeToLocalFileTime
- FileTimeToSystemTime
- Process and Thread Functions
- Processes
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Build date: 3/7/2012
[DllImport("kernel32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public static extern bool GetProcessTimes(IntPtr handle, out long creation, out long exit, out long kernel, out long user);
<DllImport("kernel32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
Public Shared Function GetProcessTimes(ByVal handle As IntPtr, <Out> ByRef creation As Long, <Out> ByRef lpexit As Long, <Out> ByRef kernel As Long, <Out> ByRef user As Long) As Boolean
End Function