762 lines
25 KiB
C
762 lines
25 KiB
C
/*++
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Copyright (c) 1990 - 1996 Microsoft Corporation
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Module Name:
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schedule.c
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Abstract:
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This module provides all the scheduling services for the Local Spooler
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Author:
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Dave Snipp (DaveSn) 15-Mar-1991
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Revision History:
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Krishna Ganugapati (KrishnaG) 07-Dec-1993 - rewrote the scheduler thread to
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gracefully kill off port threads if there are no jobs assigned to ports and
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to recreate the port thread if the port receives a job and is without a thread.
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Matthew A Felton (MattFe) June 1994 RapidPrint implemented
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MattFe April 96 Chained Jobs
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--*/
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#include <precomp.h>
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#define MIDNIGHT (60 * 60 * 24)
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#if DBG
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/* For the debug message:
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*/
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#define HOUR_FROM_SECONDS(Time) (((Time) / 60) / 60)
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#define MINUTE_FROM_SECONDS(Time) (((Time) / 60) % 60)
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#define SECOND_FROM_SECONDS(Time) (((Time) % 60) % 60)
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/* Format for %02d:%02d:%02d replaceable string:
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*/
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#define FORMAT_HOUR_MIN_SEC(Time) HOUR_FROM_SECONDS(Time), \
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MINUTE_FROM_SECONDS(Time), \
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SECOND_FROM_SECONDS(Time)
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/* Format for %02d:%02d replaceable string:
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*/
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#define FORMAT_HOUR_MIN(Time) HOUR_FROM_SECONDS(Time), \
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MINUTE_FROM_SECONDS(Time)
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#endif
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HANDLE SchedulerSignal = NULL;
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VOID
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DbgPrintTime(
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);
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DWORD
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GetTimeToWait(
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DWORD CurrentTime,
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PINIPRINTER pIniPrinter,
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PINIJOB pIniJob
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);
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DWORD
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GetCurrentTimeInSeconds(
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);
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PINIJOB
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AssignFreeJobToFreePort(
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PINIPORT pIniJob,
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DWORD *pSecsToWait
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);
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DWORD
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SchedulerThread(
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PINISPOOLER pIniSpooler
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)
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{
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PINIPORT pIniPort;
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PINIJOB pIniJob;
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DWORD SchedulerTimeout = INFINITE; // In seconds
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DWORD ThisPortTimeToWait; // In seconds
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PINIPORT pIniNextPort = NULL;
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for( ; ; ) {
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if (SchedulerTimeout == INFINITE) {
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DBGMSG(DBG_TRACE, ("Scheduler thread waiting indefinitely\n"));
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} else {
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DBGMSG(DBG_TRACE, ("Scheduler thread waiting for %02d:%02d:%02d\n",
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FORMAT_HOUR_MIN_SEC(SchedulerTimeout)));
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//
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// The SchedulerTimeout is in seconds, so we need to multiply
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// by 1000.
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//
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SchedulerTimeout *= 1000;
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}
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if (WaitForSingleObject(SchedulerSignal,
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SchedulerTimeout) == WAIT_FAILED) {
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DBGMSG(DBG_WARNING, ("SchedulerThread:WaitforSingleObject failed: Error %d\n",
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GetLastError()));
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}
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/* The timeout will be reset if there are jobs to be printed
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* at a later time. This will result in WaitForSingleObject
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* timing out when the first one is due to be printed.
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*/
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SchedulerTimeout = INFINITE;
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EnterSplSem();
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pIniPort = pIniSpooler->pIniPort;
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while (pIniPort) {
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DBGMSG(DBG_TRACE, ("Now Processing Port %ws\n", pIniPort->pName));
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SPLASSERT( pIniPort->signature == IPO_SIGNATURE );
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// Check conditions based on which we can assign this
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// port a job.
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//
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// Rule 1 - if there is a job being processed by this
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// port, then leave this port alone.
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//
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if ( (pIniPort->pIniJob) &&
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!(pIniPort->Status & PP_WAITING )){
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SPLASSERT( pIniPort->pIniJob->signature == IJ_SIGNATURE );
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//
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// If this port has a job which has timed out AND
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// there is another job waiting on this port then
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// push the timed out job out by setting JOB_ABANDON
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// see spooler.c LocalReadPrinter
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if (( pIniPort->pIniJob->Status & JOB_TIMEOUT ) &&
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( pIniPort->pIniJob->WaitForWrite != INVALID_HANDLE_VALUE ) &&
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( NULL != AssignFreeJobToFreePort( pIniPort, &ThisPortTimeToWait ) )) {
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pIniPort->pIniJob->Status |= JOB_ABANDON;
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ReallocSplStr(&pIniPort->pIniJob->pStatus, szFastPrintTimeout);
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LogJobInfo( pIniSpooler,
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MSG_DOCUMENT_TIMEOUT,
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pIniPort->pIniJob->JobId,
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pIniPort->pIniJob->pDocument,
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pIniPort->pIniJob->pUser,
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pIniPort->pIniJob->pIniPrinter->pName,
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dwFastPrintWaitTimeout );
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SetEvent( pIniPort->pIniJob->WaitForWrite );
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SetPrinterChange(pIniPort->pIniJob->pIniPrinter,
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pIniPort->pIniJob,
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NVJobStatusAndString,
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PRINTER_CHANGE_SET_JOB,
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pIniPort->pIniSpooler);
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}
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pIniPort = pIniPort->pNext;
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continue;
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}
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//
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// Is there any job that can be scheduled to this port
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//
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pIniJob = AssignFreeJobToFreePort(pIniPort, &ThisPortTimeToWait);
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SchedulerTimeout = min(ThisPortTimeToWait, SchedulerTimeout);
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if (pIniPort->Status & PP_THREADRUNNING) {
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if (pIniPort->Status & PP_WAITING) {
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// If we are working on a Chained Job then the job has already
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// been assigned by the port thread from the last job on this port
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// so ignore any other job found for us
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if ( pIniPort->pIniJob ) {
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pIniJob = pIniPort->pIniJob;
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DBGMSG( DBG_TRACE, ("ScheduleThread NextJob pIniPort %x JoId %d pIniJob %x\n",
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pIniPort, pIniJob->JobId, pIniJob ));
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}
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if ( pIniJob ) {
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DBGMSG(DBG_TRACE, ("ScheduleThread pIniJob %x Size %d pDocument %ws\n",
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pIniJob, pIniJob->Size, pIniJob->pDocument));
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if (pIniPort != pIniJob->pIniPort) {
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++pIniPort->cJobs;
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pIniJob->pIniPort = pIniPort;
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}
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pIniPort->pIniJob = pIniJob;
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// Chained Jobs
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// Point the Master Jobs Current Pointer to the first
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// in the chain.
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if ( pIniJob->pCurrentIniJob == NULL &&
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pIniJob->NextJobId != 0 ) {
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pIniJob->pCurrentIniJob = pIniJob;
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}
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pIniPort->Status &= ~PP_WAITING;
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// If the job is still spooling then we will need
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// to create an event to synchronize the port thread
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if ( !( pIniJob->Status & JOB_DIRECT ) ) {
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pIniJob->WaitForWrite = INVALID_HANDLE_VALUE;
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if ( pIniJob->Status & JOB_SPOOLING ) {
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pIniJob->WaitForWrite = CreateEvent( NULL,
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EVENT_RESET_MANUAL,
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EVENT_INITIAL_STATE_NOT_SIGNALED,
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NULL );
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}
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}
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// Update cRef so that nobody can delete this job
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// before the Port Thread Starts up
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SplInSem();
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INCJOBREF(pIniJob);
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SetEvent(pIniPort->Semaphore);
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pIniJob->Status |= JOB_DESPOOLING;
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} else {
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//
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// If the port thread is running and it is waiting
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// for a job and there is no job to assign, then
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// kill the port thread
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//
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DBGMSG(DBG_TRACE, ("Now destroying the new port thread %.8x\n", pIniPort));
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DestroyPortThread(pIniPort, FALSE);
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pIniPort->Status &= ~PP_WAITING;
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if (pIniPort->Status & PP_FILE) {
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//
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// We should destroy the Pseudo-File Port at this
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// point. There are no jobs assigned to this Port
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// and we are in Critical Section
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//
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//
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// Now deleting the pIniPort entry for the Pseudo-Port
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//
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DBGMSG(DBG_TRACE, ("Now deleting the Pseudo-Port %ws\n", pIniPort->pName));
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pIniNextPort = pIniPort->pNext;
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DBGMSG(DBG_TRACE, ("The Next Port that will be processed is %ws\n", pIniNextPort->pName));
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if ( !pIniPort->cJobs )
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DeletePortEntry(pIniPort);
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pIniPort = pIniNextPort;
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continue;
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}
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}
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}
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} else if (!(pIniPort->Status & PP_THREADRUNNING) && pIniJob) {
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//
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// If the port thread is not running, and there is a job to
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// assign, then create a port thread. REMEMBER do not assign
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// the job to the port because we are in a Spooler Section and
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// if we release the Spooler Section, the first thing the port
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// thread does is reinitialize its pIniPort->pIniJob to NULL
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// Wait the next time around we execute the for loop to assign
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// the job to this port. Should we set SchedulerTimeOut to zero??
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//
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DBGMSG( DBG_TRACE, ("ScheduleThread Now creating the new port thread pIniPot %x\n", pIniPort));
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CreatePortThread( pIniPort );
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}
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//
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// Now go to the next port
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//
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pIniPort = pIniPort->pNext;
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}
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//
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// Leave Spooler Semaphore
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//
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LeaveSplSem();
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}
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return 0;
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}
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PINIJOB
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AssignFreeJobToFreePort(
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PINIPORT pIniPort,
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DWORD *pSecsToWait
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)
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/*++
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Note: You must ensure that the port is free. This function will not
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assign a job to this port, but if there exists one, it will return a
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pointer to the INIJOB. Irrespective of whether it finds a job or not,
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it will return the minimum timeout value that the scheduler thread
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should sleep for.
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--*/
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{
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DWORD CurrentTime; // Time in seconds
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DWORD Timeout = INFINITE; // Time in seconds
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DWORD SecsToWait; // Time in seconds
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PINIPRINTER pTopIniPrinter, pIniPrinter;
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PINIJOB pTopIniJob, pIniJob;
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PINIJOB pTopIniJobOnThisPrinter, pTopIniJobSpooling;
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DWORD i;
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SplInSem();
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if ( pIniPort->Status & PP_ERROR ) {
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return NULL;
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}
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pTopIniPrinter = NULL;
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pTopIniJob = NULL;
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for (i = 0; i < pIniPort->cPrinters ; i++) {
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pIniPrinter = pIniPort->ppIniPrinter[i];
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//
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// if this printer is in a state not to print skip it
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//
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if ( PrinterStatusBad(pIniPrinter->Status) ) {
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continue;
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}
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//
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// if we haven't found a top-priority printer yet,
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// or this printer is higher priority than the top-priority
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// printer, see if it has jobs to go. If we find any, the
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// highest priority one will become the top priority job and
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// this printer will become the top-priority printer.
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//
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if (!pTopIniPrinter ||
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(pIniPrinter->Priority > pTopIniPrinter->Priority)) {
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pTopIniJobOnThisPrinter = NULL;
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pTopIniJobSpooling = NULL;
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pIniJob = pIniPrinter->pIniFirstJob;
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while (pIniJob) {
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if (!(pIniPort->Status & PP_FILE) &&
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(pIniJob->Status & JOB_PRINT_TO_FILE)) {
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pIniJob = pIniJob->pIniNextJob;
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continue;
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}
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if ((pIniPort->Status & PP_FILE) &&
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!(pIniJob->Status & JOB_PRINT_TO_FILE)) {
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pIniJob = pIniJob->pIniNextJob;
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continue;
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}
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// Find a job which is not PAUSED, PRINTING etc.
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// For RapidPrint also allow SPOOLING jobs to print
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if ( ( !( pIniJob->pIniPrinter->Attributes & PRINTER_ATTRIBUTE_DIRECT ) &&
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!( pIniJob->pIniPrinter->Attributes & PRINTER_ATTRIBUTE_QUEUED ) &&
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( pIniJob->Status & JOB_SPOOLING ) &&
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!( pIniJob->Status & ( JOB_PAUSED | JOB_PRINTING |
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JOB_PRINTED | JOB_TIMEOUT |
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JOB_DESPOOLING | JOB_PENDING_DELETION |
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JOB_BLOCKED_DEVQ | JOB_COMPOUND ))) ||
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// OR //
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!(pIniJob->Status & ( JOB_SPOOLING |
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JOB_PAUSED | JOB_PRINTING |
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JOB_PRINTED | JOB_TIMEOUT |
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JOB_DESPOOLING | JOB_PENDING_DELETION |
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JOB_BLOCKED_DEVQ | JOB_COMPOUND ))) {
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//
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// if we find such a job, then determine how much
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// time, we need to wait before this job can actually
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// print.
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//
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CurrentTime = GetCurrentTimeInSeconds();
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#if DBG
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if (MODULE_DEBUG & DBG_TIME)
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DbgPrintTime();
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#endif
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SecsToWait = GetTimeToWait(CurrentTime, pIniPrinter, pIniJob);
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if (SecsToWait == 0) {
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//
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// if we needn't wait at all, then we make this job the
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// TopIniJob if either there is no TopIniJob or this job
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// has a higher priority than an existing TopIniJob on this
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// printer.
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//
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// Keep both the Highest Priority Spooling and Non
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// spooling job in case we want to favour non spooling
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// jobs over spooling jobs
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if ( pIniJob->Status & JOB_SPOOLING ) {
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if ( pTopIniJobSpooling == NULL ) {
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pTopIniJobSpooling = pIniJob;
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} else if ( pIniJob->pIniPrinter->Attributes & PRINTER_ATTRIBUTE_DO_COMPLETE_FIRST ) {
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//
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// For DO_COMPLETE_FIRST we'll take larger jobs
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// first over pure priority based
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//
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if (( pIniJob->Size > pTopIniJobSpooling->Size ) ||
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(( pIniJob->Size == pTopIniJobSpooling->Size ) &&
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( pIniJob->Priority > pTopIniJobSpooling->Priority ))) {
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pTopIniJobSpooling = pIniJob;
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}
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// For Priority Based, pick a higher priority job if it has some
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// at least our minimum requirement
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} else if (( pIniJob->Priority > pTopIniJobSpooling->Priority ) &&
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( pIniJob->Size >= dwFastPrintSlowDownThreshold )) {
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pTopIniJobSpooling = pIniJob;
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}
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} else {
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if (!pTopIniJobOnThisPrinter ||
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(pIniJob->Priority > pTopIniJobOnThisPrinter->Priority)) {
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pTopIniJobOnThisPrinter = pIniJob;
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}
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}
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} else {
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//
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// if we have to wait then keep track of how long we
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// can doze off before the next job that is to be
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// scheduled later.
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//
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Timeout = min(Timeout, SecsToWait);
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}
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}
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//
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// loop thru all jobs on this printer.
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//
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pIniJob = pIniJob->pIniNextJob;
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}
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//
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// We've already established that this printer has a
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// higher priority than any previous TopIniPrinter or
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// that there is no TopIniPrinter yet.
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// if we did find a TopIniJobOnThisPrinter for this pIniPrinter
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// update the TopIniPrinter and TopIniJob pointers
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//
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// We don't want to schedule Spooling Jobs whose size doesn't meet
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// our minimum size requirement
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if (( pTopIniJobSpooling != NULL ) &&
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( dwFastPrintSlowDownThreshold > pTopIniJobSpooling->Size )) {
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pTopIniJobSpooling = NULL ;
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}
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if ( pTopIniJobOnThisPrinter == NULL ) {
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pTopIniJobOnThisPrinter = pTopIniJobSpooling;
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} else {
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// For FastPrint we can choose to favour Completed jobs over
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// Spooling jobs
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if ( !( pIniPrinter->Attributes & PRINTER_ATTRIBUTE_DO_COMPLETE_FIRST ) &&
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( pTopIniJobSpooling ) &&
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( pTopIniJobSpooling->Priority > pTopIniJobOnThisPrinter->Priority )) {
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pTopIniJobOnThisPrinter = pTopIniJobSpooling;
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}
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}
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if (pTopIniJobOnThisPrinter) {
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pTopIniPrinter = pIniPrinter;
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pTopIniJob = pTopIniJobOnThisPrinter;
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}
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}
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//
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// This ends the if clause for finding a printer with higher priority
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// than the current TopIniPrinter. Loop back and process all printers
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}
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//
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// End of For Loop for all Printers
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//
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//
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// if we have a TopIniJob at this stage, it means we have a job that can be
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// assigned to the IniPort. We will return a pointer to this job back
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// We will also copy the Timeout value that has been computed for this
|
|
// IniPort back to the SchedulerThread.
|
|
|
|
*pSecsToWait = Timeout;
|
|
|
|
return(pTopIniJob);
|
|
|
|
}
|
|
|
|
DWORD
|
|
GetCurrentTimeInSeconds(
|
|
)
|
|
/*++
|
|
|
|
Note: This function returns a value representing the time in seconds
|
|
|
|
|
|
--*/
|
|
{
|
|
SYSTEMTIME st;
|
|
|
|
GetSystemTime(&st);
|
|
|
|
return ((((st.wHour * 60) + st.wMinute) * 60) + st.wSecond);
|
|
}
|
|
|
|
/* GetTimeToWait
|
|
*
|
|
* Determines how long it is in seconds from the current time
|
|
* before the specified job should be printed on the specified printer.
|
|
*
|
|
* Parameters:
|
|
*
|
|
* CurrentTime - Current system time in seconds
|
|
*
|
|
* pIniPrinter - Pointer to INIPRINTER structure for the printer.
|
|
* This contains the StartTime and UntilTime fields.
|
|
*
|
|
* pIniJob - Pointer to INIJOB structure for the job.
|
|
* This contains the StartTime and UntilTime fields.
|
|
*
|
|
* Return value:
|
|
*
|
|
* The number of seconds till the job should be printed.
|
|
* If the job can be printed immediately, this will be 0.
|
|
* We don't support specifying the day the job should be printed,
|
|
* so the return value should always be in the following range:
|
|
*
|
|
* 0 <= return value < 86400 (60 * 60 * 24)
|
|
*
|
|
* Remarks:
|
|
*
|
|
* The user can specify hours on both the printer and the job.
|
|
* Thus a printer may be configured to print only at night,
|
|
* say between the hours 20:00 and 06:00.
|
|
* Any job submitted to the printer outside those hours
|
|
* will not print until 20:00.
|
|
* If, in addition, the user specifies the hours when the job
|
|
* may print (e.g. through Printer Properties -> Details
|
|
* in Print Manager), the job will print when the two periods
|
|
* overlap.
|
|
*
|
|
* This routine finds the two wait periods determined by the
|
|
* printer hours and the job hours respectively.
|
|
* The actual time to wait is the longer of the two.
|
|
* It therefore assumes that the two periods overlap.
|
|
* This doesn't matter if the routine is called again
|
|
* when the scheduler thread wakes up again.
|
|
*
|
|
* CHANGED: 14 June 1993
|
|
*
|
|
* The printer times are now ignored.
|
|
* When a job is submitted it inherits the printer's hours.
|
|
* These are all we need to check. Now if the printer's hours
|
|
* are changed, any already existing jobs on that printer
|
|
* will still print within the originally assigned times.
|
|
*
|
|
*
|
|
*/
|
|
DWORD
|
|
GetTimeToWait(
|
|
DWORD CurrentTime,
|
|
PINIPRINTER pIniPrinter,
|
|
PINIJOB pIniJob
|
|
)
|
|
{
|
|
/* Printer and job start and until times are in minutes.
|
|
* Convert them to seconds, so that we can start printing
|
|
* bang on the minute.
|
|
*/
|
|
DWORD PrinterStartTime = (pIniPrinter->StartTime * 60);
|
|
DWORD PrinterUntilTime = (pIniPrinter->UntilTime * 60);
|
|
DWORD JobStartTime = (pIniJob->StartTime * 60);
|
|
DWORD JobUntilTime = (pIniJob->UntilTime * 60);
|
|
DWORD PrinterTimeToWait = 0;
|
|
DWORD JobTimeToWait = 0;
|
|
DWORD TimeToWait = 0;
|
|
|
|
/* Current time must be within the window between StartTime and UntilTime
|
|
* of both the printer and the job.
|
|
* But if StartTime and UntilTime are identical, any time is valid.
|
|
*/
|
|
|
|
#ifdef IGNORE_PRINTER_TIMES
|
|
|
|
if (PrinterStartTime > PrinterUntilTime) {
|
|
|
|
/* E.g. StartTime = 20:00
|
|
* UntilTime = 06:00
|
|
*
|
|
* This spans midnight, so check we're not in the period
|
|
* between UntilTime and StartTime:
|
|
*/
|
|
if ((CurrentTime < PrinterStartTime)
|
|
&&(CurrentTime >= PrinterUntilTime)) {
|
|
|
|
/* It's after 06:00, but before 20:00:
|
|
*/
|
|
PrinterTimeToWait = (PrinterStartTime - CurrentTime);
|
|
}
|
|
|
|
} else if (PrinterStartTime < PrinterUntilTime) {
|
|
|
|
/* E.g. StartTime = 08:00
|
|
* UntilTime = 18:00
|
|
*/
|
|
if (CurrentTime < PrinterStartTime) {
|
|
|
|
/* It's after midnight, but before printing hours:
|
|
*/
|
|
PrinterTimeToWait = (PrinterStartTime - CurrentTime);
|
|
|
|
} else if (CurrentTime >= PrinterUntilTime) {
|
|
|
|
/* It's before midnight, and after printing hours.
|
|
* In this case, time to wait is the period until
|
|
* midnight plus the start time:
|
|
*/
|
|
PrinterTimeToWait = ((MIDNIGHT - CurrentTime) + PrinterStartTime);
|
|
}
|
|
}
|
|
|
|
#endif /* IGNORE_PRINTER_TIMES
|
|
|
|
/* Do the same for the job time constraints:
|
|
*/
|
|
if (JobStartTime > JobUntilTime) {
|
|
|
|
if ((CurrentTime < JobStartTime)
|
|
&&(CurrentTime >= JobUntilTime)) {
|
|
|
|
JobTimeToWait = (JobStartTime - CurrentTime);
|
|
}
|
|
|
|
} else if (JobStartTime < JobUntilTime) {
|
|
|
|
if (CurrentTime < JobStartTime) {
|
|
|
|
JobTimeToWait = (JobStartTime - CurrentTime);
|
|
|
|
} else if (CurrentTime >= JobUntilTime) {
|
|
|
|
JobTimeToWait = ((MIDNIGHT - CurrentTime) + JobStartTime);
|
|
}
|
|
}
|
|
|
|
|
|
TimeToWait = max(PrinterTimeToWait, JobTimeToWait);
|
|
|
|
DBGMSG(DBG_TRACE, ("Checking time to print %ws\n"
|
|
"\tCurrent time: %02d:%02d:%02d\n"
|
|
"\tPrinter hours: %02d:%02d to %02d:%02d\n"
|
|
"\tJob hours: %02d:%02d to %02d:%02d\n"
|
|
"\tTime to wait: %02d:%02d:%02d\n\n",
|
|
pIniJob->pDocument ?
|
|
pIniJob->pDocument :
|
|
L"(NULL)",
|
|
FORMAT_HOUR_MIN_SEC(CurrentTime),
|
|
FORMAT_HOUR_MIN(PrinterStartTime),
|
|
FORMAT_HOUR_MIN(PrinterUntilTime),
|
|
FORMAT_HOUR_MIN(JobStartTime),
|
|
FORMAT_HOUR_MIN(JobUntilTime),
|
|
FORMAT_HOUR_MIN_SEC(TimeToWait)));
|
|
|
|
return TimeToWait;
|
|
}
|
|
|
|
|
|
#if DBG
|
|
VOID DbgPrintTime(
|
|
)
|
|
{
|
|
SYSTEMTIME st;
|
|
|
|
GetLocalTime(&st);
|
|
|
|
DBGMSG( DBG_TIME,
|
|
( "Time: %02d:%02d:%02d\n", st.wHour, st.wMinute, st.wSecond ));
|
|
}
|
|
#endif
|