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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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GetProcessTimes
The GetProcessTimes function obtains timing information about a specified process.
BOOL GetProcessTimes(
HANDLE hProcess,
| // specifies the process of interest
| LPFILETIME lpCreationTime,
| // when the process was created
| LPFILETIME lpExitTime,
| // when the process exited
| LPFILETIME lpKernelTime,
| // time the process has spent in kernel mode
| LPFILETIME lpUserTime
| // time the process has spent in user mode
| );
|
|
Parameters
hProcess
An open handle that specifies the process whose timing information is sought.
This handle must be created with PROCESS_QUERY_INFORMATION access. For more
information, see Process Objects.
lpCreationTime
Points to a FILETIME structure that receives the creation time of the process.
lpExitTime
Points 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
Points 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
Points 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 Values
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.
The Win32 API provides 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.
See Also
FILETIME, FileTimeToDosDateTime, FileTimeToLocalFileTime, FileTimeToSystemTime
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