220 lines
5.9 KiB
C
220 lines
5.9 KiB
C
/*++
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Copyright (c) 1994 - 1995 Microsoft Corporation
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Module Name:
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sizethrd.c
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Abstract:
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The NT server share for downlevel jobs does not set the size whilst
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spooling. The SizeDetectionThread periodically wakes walks all the
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actively spooling jobs and if necessary updates the size.
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Author:
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Matthew Felton (mattfe) May 1994
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Revision History:
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--*/
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#include <precomp.h>
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#define SIZE_THREAD_WAIT_PERIOD 2.5*1000 // period size thread sleeps
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// for polling file sizes
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VOID
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SizeDetectionThread(
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PINISPOOLER pIniSpooler
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);
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VOID
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CheckSizeDetectionThread(
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PINISPOOLER pIniSpooler
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)
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{
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DWORD ThreadId;
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SplInSem();
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if ( ( pIniSpooler->hSizeDetectionThread == INVALID_HANDLE_VALUE ) ||
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( pIniSpooler->hSizeDetectionThread == NULL )) {
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pIniSpooler->hSizeDetectionThread = CreateThread(NULL,
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0,
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(LPTHREAD_START_ROUTINE)SizeDetectionThread,
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pIniSpooler,
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0,
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&ThreadId);
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}
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}
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VOID
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SizeDetectionThread(
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PINISPOOLER pIniSpooler
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)
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{
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PINIPRINTER pIniPrinter = NULL;
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PINIJOB pIniJob = NULL;
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PINIJOB pIniNextJob;
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WCHAR szFileName[MAX_PATH];
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HANDLE hFile = INVALID_HANDLE_VALUE;
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DWORD dwFileSize = 0;
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DWORD dwOldSize = 0;
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BOOL bJobsSpooling = TRUE;
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EnterSplSem();
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//
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// Outer Loop
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// This thread stays active until there are no more jobs spooling
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//
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while ( ( pIniSpooler->hSizeDetectionThread != INVALID_HANDLE_VALUE ) &&
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( pIniSpooler->pIniPrinter != NULL ) &&
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( bJobsSpooling ) ) {
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bJobsSpooling = FALSE;
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//
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// Middle Loop
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// Walk printers
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//
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pIniPrinter = pIniSpooler->pIniPrinter;
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while ( pIniPrinter != NULL ) {
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//
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// Inner Loop
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// Walk all Jobs looking for a Spooling Job
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//
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pIniJob = pIniPrinter->pIniFirstJob;
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INCPRINTERREF(pIniPrinter);
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while (pIniJob) {
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INCJOBREF(pIniJob);
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SplInSem();
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if ((pIniJob->Status & JOB_SPOOLING) &&
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(pIniJob->Status & JOB_TYPE_ADDJOB)) {
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bJobsSpooling = TRUE;
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GetFullNameFromId (pIniPrinter,
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pIniJob->JobId,
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TRUE,
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szFileName,
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FALSE);
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// Increment the reference count so the IniJob doesn't
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// go away whilst we are outside CriticalSection
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SPLASSERT( pIniJob->signature == IJ_SIGNATURE );
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SPLASSERT( pIniPrinter->signature == IP_SIGNATURE );
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LeaveSplSem();
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SplOutSem();
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dwFileSize = 0;
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hFile = CreateFile(szFileName, 0, FILE_SHARE_WRITE, NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL, 0);
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if ( hFile != INVALID_HANDLE_VALUE ) {
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dwFileSize = GetFileSize( hFile, 0 );
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CloseHandle( hFile );
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}
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EnterSplSem();
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SplInSem();
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SPLASSERT( pIniJob->signature == IJ_SIGNATURE );
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if ( pIniJob->Size < dwFileSize ) {
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dwOldSize = pIniJob->Size;
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pIniJob->Size = dwFileSize;
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//
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// Wait until Jobs reach our size threshold before
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// we schedule them.
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//
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if (( dwOldSize < dwFastPrintSlowDownThreshold ) &&
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( dwFileSize >= dwFastPrintSlowDownThreshold ) &&
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( pIniJob->WaitForWrite == INVALID_HANDLE_VALUE )) {
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CHECK_SCHEDULER();
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}
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SetPrinterChange(pIniPrinter,
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pIniJob,
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NVSpoolJob,
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PRINTER_CHANGE_WRITE_JOB,
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pIniPrinter->pIniSpooler);
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// Support for despooling whilst spooling
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// for Down Level jobs
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if (pIniJob->WaitForWrite != INVALID_HANDLE_VALUE)
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SetEvent( pIniJob->WaitForWrite );
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}
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}
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pIniNextJob = pIniJob->pIniNextJob;
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DECJOBREF(pIniJob);
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//
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// We must protect pIniNextJob immediately,
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// since we will may leave critical section in
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// DeleteJobCheck (it may call DeleteJob). While out
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// of critical section, pIniNextJob may be deleted,
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// causing it's next pointer to be bogus. We'll AV
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// after we try and process it.
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//
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if (pIniNextJob) {
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INCJOBREF(pIniNextJob);
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}
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DeleteJobCheck(pIniJob);
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if (pIniNextJob) {
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DECJOBREF(pIniNextJob);
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}
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pIniJob = pIniNextJob;
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}
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DECPRINTERREF(pIniPrinter);
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pIniPrinter = pIniPrinter->pNext;
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}
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LeaveSplSem();
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Sleep( (DWORD)SIZE_THREAD_WAIT_PERIOD );
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EnterSplSem();
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}
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SplInSem();
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CloseHandle ( pIniSpooler->hSizeDetectionThread );
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pIniSpooler->hSizeDetectionThread = INVALID_HANDLE_VALUE;
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LeaveSplSem();
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ExitThread( 0 );
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}
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