176 lines
2.8 KiB
C
176 lines
2.8 KiB
C
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/*++
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Copyright (c) 1993 Microsoft Corporation
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Module Name:
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vwasync.c
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Abstract:
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ntVdm netWare (Vw) IPX/SPX Functions
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Vw: The peoples' network
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Contains Asyncrhonous Event Scheduler (thread)
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Contents:
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VwAesThread
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(CheckPendingIpxRequests)
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Author:
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Richard L Firth (rfirth) 30-Sep-1993
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Environment:
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User-mode Win32
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Revision History:
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30-Sep-1993 rfirth
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Created
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--*/
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#include "vw.h"
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#pragma hdrstop
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//
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// private routine prototypes
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//
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PRIVATE
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VOID
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CheckPendingIpxRequests(
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VOID
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);
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//
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// global data
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//
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WORD AesTickCount;
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//
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// functions
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//
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#if _MSC_FULL_VER >= 13008827
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#pragma warning(push)
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#pragma warning(disable:4715) // Not all control paths return (due to infinite loop)
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#endif
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DWORD
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VwAesThread(
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IN LPVOID Parameters
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)
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/*++
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Routine Description:
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Provides the functionality of the Asynchronous Event Scheduler (AES) in the
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Netware world:
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- updates the tick count
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- completes any matured timer events
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- checks any pending requests and schedules the next action
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This thread wakes up every PC tick (1/18 second)
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Arguments:
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Parameters - unused
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Return Value:
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DWORD
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0
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--*/
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{
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BOOL fOperationPerformed = FALSE ;
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static int n = 1 ;
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UNREFERENCED_PARAMETER(Parameters);
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while (TRUE)
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{
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//
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// we will always yield in this loop to be friendly to others,
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// but occasionally we will forcefully do a non zero sleep for
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// lower priority threads to run.
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//
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if ((n % 100) == 0)
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{
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Sleep(ONE_TICK) ;
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n = 1 ;
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}
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if (!fOperationPerformed && ((n % 4) == 0))
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{
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Sleep(10) ;
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n++ ;
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}
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else
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{
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Sleep(0) ;
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n++ ;
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}
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++AesTickCount;
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ScanTimerList();
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CheckPendingIpxRequests();
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CheckPendingSpxRequests(&fOperationPerformed);
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}
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return 0; // compiler-pacifier
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}
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#if _MSC_FULL_VER >= 13008827
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#pragma warning(pop)
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#endif
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PRIVATE
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VOID
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CheckPendingIpxRequests(
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VOID
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)
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/*++
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Routine Description:
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Polls the opened, active non-blocking IPX sockets to see if there is anything
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to do (data to receive, availability to send, timeouts)
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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LPSOCKET_INFO pActiveSocket = NULL;
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//
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// search SOCKET_INFO structures for something to do. Could do select()
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// but we have most of the info anyway. We use the BFI filter mechanism
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//
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while (pActiveSocket = FindActiveSocket(pActiveSocket)) {
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if (pActiveSocket->Flags & SOCKET_FLAG_SENDING) {
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IpxSendNext(pActiveSocket);
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}
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if (pActiveSocket->Flags & SOCKET_FLAG_LISTENING) {
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IpxReceiveNext(pActiveSocket);
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}
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}
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}
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