118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
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/*++
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Copyright (c) 1995-1996 Microsoft Corporation
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Module Name :
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issched.hxx
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Abstract:
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This header file declares schedulable work item and functions for
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scheduling work items. These work items execute (once or periodically)
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on a set of worker threads maintained by the scheduler
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Author:
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Murali R. Krishnan ( MuraliK ) 31-July-1995
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Environment:
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Win32 -- User Mode
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Project:
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Internet Information Services RunTime Library DLL
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Revision History:
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--*/
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# ifndef _ISSCHED_HXX_
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# define _ISSCHED_HXX_
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/************************************************************
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* Include Headers
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************************************************************/
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# include <windows.h>
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# include <timer.h>
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/************************************************************
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* Type Definitions
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************************************************************/
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//
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// The callback functions you provide must have this signature
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//
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typedef
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VOID
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(WINAPI * PFN_SCHED_CALLBACK)(
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IN OUT PVOID pContext
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);
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//
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// Typically, you use the Scheduler like this:
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// g_dwCookie = ScheduleWorkItem(MyCallback, &ctxt, 30 * 1000);
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//
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// VOID
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// MyCallback(
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// VOID* pvContext)
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// {
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// g_dwCookie = 0; // free the cookie
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// CContext* pctxt = (CContext*) pvContext;
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// // whatever...
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// }
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//
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// If you need to cleanup, possibly before the scheduler has been
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// called, do this
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// if (g_dwCookie != 0)
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// {
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// RemoveWorkItem(g_dwCookie);
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// g_dwCookie = 0;
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// }
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// Effective with IIS 5.0, the scheduler is part of the IISRTL module.
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// IISRTL takes care of init/cleanup business of the scheduler, but you
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// must make sure to call InitializeIISRTL() and TerminateIISRTL() from
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// your own code if you want to use the scheduler APIs. Note: these
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// initialization/termination routines must *not* be called from your DllMain
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// if you want to avoid deadlocks. (DllMains are not re-entrant, so you cannot
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// create or shut down threads within them.)
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// Schedule a work item. For COM uses, note that the worker thread has been
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// CoInitialized as COINIT_MULTITHREADED. Returns a unique cookie that can
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// be used as the parameter to ScheduleAdjustTime and RemoveWorkItem.
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DWORD
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WINAPI
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ScheduleWorkItem(
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IN PFN_SCHED_CALLBACK pfnCallback,
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IN PVOID pContext,
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IN DWORD msecTimeInterval, // delta
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IN BOOL fPeriodic = FALSE
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);
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// Adjust the execution time of an already-scheduled workitem
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DWORD
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WINAPI
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ScheduleAdjustTime(
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IN DWORD dwCookie, // as returned by ScheduleWorkItem
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IN DWORD msecNewTime // delta
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);
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BOOL
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WINAPI
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RemoveWorkItem(
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IN DWORD dwCookie // as returned by ScheduleWorkItem
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);
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# endif // _ISSCHED_HXX_
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/************************ End of File ***********************/
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