Platform SDK: DLLs, Processes, and Threads

GetThreadTimes

The GetThreadTimes function retrieves timing information for the specified thread.

BOOL GetThreadTimes(
  HANDLE hThread,             // handle to thread
  LPFILETIME lpCreationTime,  // thread creation time
  LPFILETIME lpExitTime,      // thread exit time
  LPFILETIME lpKernelTime,    // thread kernel-mode time
  LPFILETIME lpUserTime       // thread user-mode time
);

Parameters

hThread: [in] Handle to the thread whose timing information is sought. This handle must be created with THREAD_QUERY_INFORMATION access. For more information, see Thread Security and Access Rights.
lpCreationTime: [out] Pointer to a FILETIME structure that receives the creation time of the thread.
lpExitTime: [out] Pointer to a FILETIME structure that receives the exit time of the thread. If the thread has not exited, the content of this structure is undefined.
lpKernelTime: [out] Pointer to a FILETIME structure that receives the amount of time that the thread has executed in kernel mode.
lpUserTime: [out] Pointer to a FILETIME structure that receives the amount of time that the thread has executed in user mode.

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.

Thread 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; see Time Functions, particularly those noted in the following See Also section.

Thread kernel mode and user mode times are amounts of time. For example, if a thread 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.

Requirements

  Windows NT/2000: Requires Windows NT 3.5 or later.
  Windows 95/98: Unsupported.
  Header: Declared in Winbase.h; include Windows.h.
  Library: Use Kernel32.lib.