TimerCallback callback function

Applications implement this callback if they call the SetThreadpoolTimer function to start a worker thread for the timer object.

The PTP_TIMER_CALLBACK type defines a pointer to this callback function. TimerCallback is a placeholder for the application-defined function name.

Syntax

VOID CALLBACK TimerCallback(
  _Inout_     PTP_CALLBACK_INSTANCE Instance,
  _Inout_opt_ PVOID                 Context,
  _Inout_     PTP_TIMER             Timer
);

Parameters

• Instance [in, out]
  A TP_CALLBACK_INSTANCE structure that defines the callback instance. Applications do not modify the members of this structure.

  This structure can be passed to one of the following functions:

  • CallbackMayRunLong
  • DisassociateCurrentThreadFromCallback
  • FreeLibraryWhenCallbackReturns
  • LeaveCriticalSectionWhenCallbackReturns
  • ReleaseMutexWhenCallbackReturns
  • ReleaseSemaphoreWhenCallbackReturns
  • SetEventWhenCallbackReturns

• Context [in, out, optional]
  The application-defined data.

• Timer [in, out]
  A TP_TIMER structure that defines the timer object that generated the callback.

Return value

This function does not return a value.

Requirements

Minimum supported client	Windows Vista [desktop apps | UWP apps]
Minimum supported server	Windows Server 2008 [desktop apps | UWP apps]
Header	WinBase.h on Windows Vista, Windows 7, Windows Server 2008 and Windows Server 2008 R2 (include Windows.h); Threadpoolapiset.h on Windows 8 and Windows Server 2012

See also

SetThreadpoolTimer