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128 lines
3.2 KiB
128 lines
3.2 KiB
/*==========================================================================
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*
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* Copyright (C) 1994-1995 Microsoft Corporation. All Rights Reserved.
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*
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* File: w95hack.c
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* Content: Win95 hack-o-rama code
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* This is a HACK to handle the fact that Win95 doesn't notify
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* a DLL when a process is destroyed.
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* History:
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* Date By Reason
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* ==== == ======
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* 28-mar-95 craige initial implementation
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* 01-apr-95 craige happy fun joy updated header file
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* 06-apr-95 craige reworked for new ddhelp
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* 11-apr-95 craige bug where dwFakeCurrPid was getting set and
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* other processes were ending up using it!
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* 24-jun-95 craige call RemoveProcessFromDLL; use that to fiddle
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* with DLL refcnt
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* 25-jun-95 craige one ddraw mutex
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* 19-jul-95 craige notify DDHELP to clean up DC list on last object detach
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* 20-jul-95 craige internal reorg to prevent thunking during modeset
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*
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***************************************************************************/
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#include "ddrawpr.h"
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//#ifdef WIN95
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//extern DWORD dwFakeCurrPid;
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//extern DWORD dwGrimReaperPid;
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/*
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* HackGetCurrentProcessId
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*
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* This call is used in place of GetCurrentProcessId on Win95.
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* This allows us to substitute the pid of the terminated task passed to
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* us from DDHELP as the "current" process.
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*/
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DWORD HackGetCurrentProcessId( void )
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{
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DWORD pid;
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pid = GetCurrentProcessId();
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if( pid == dwGrimReaperPid )
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{
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return dwFakeCurrPid;
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}
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else
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{
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return pid;
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}
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} /* HackGetCurrentProcessId */
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/*
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* DDNotify
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*
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* called by DDHELP to notify us when a pid is dead
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*/
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BOOL DDAPI DDNotify( LPDDHELPDATA phd )
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{
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BOOL rc;
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//extern DWORD dwRefCnt;
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#ifdef USE_CHEAP_MUTEX
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DestroyPIDsLock (&CheapMutexCrossProcess,phd->pid,DDRAW_FAST_CS_NAME);
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#endif
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ENTER_DDRAW();
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dwGrimReaperPid = GetCurrentProcessId();
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dwFakeCurrPid = phd->pid;
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DPF( 2, "************* DDNotify: dwPid=%08lx has died, calling CurrentProcessCleanup", phd->pid );
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rc = FALSE;
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CurrentProcessCleanup( TRUE );
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if( RemoveProcessFromDLL( phd->pid ) )
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{
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/*
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* update refcnt if RemoveProcessFromDLL is successful.
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* It is only successful if we had a process get blown away...
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*/
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DPF( 3, "DDNotify: DLL RefCnt = %lu", dwRefCnt );
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if( dwRefCnt == 2 )
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{
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DPF( 2, "DDNotify: On last refcnt, safe to kill DDHELP.EXE" );
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dwRefCnt = 1;
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rc = TRUE; // free the DC list
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#ifdef DEBUG
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MemState();
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#endif
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}
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else if( dwRefCnt == 1 )
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{
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DPF( 1, "ERROR! DLL REFCNT DOWN TO 1" );
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#if 0
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MemFini();
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dwRefCnt = 0;
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strcpy( phd->fname, DDHAL_APP_DLLNAME );
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#endif
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}
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else if( dwRefCnt > 0 )
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{
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dwRefCnt--;
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}
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}
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/* order is important, clear dwGrimReaperPid first */
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dwGrimReaperPid = 0;
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dwFakeCurrPid = 0;
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DPF( 2, "************* DDNotify: *** DONE ***" );
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LEAVE_DDRAW();
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return rc;
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} /* DDNotify */
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/*
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* DDNotifyModeSet
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*
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* called by ddhelp when an extern modeset is done...
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*/
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void DDAPI DDNotifyModeSet( LPDDRAWI_DIRECTDRAW_GBL pdrv )
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{
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DPF( 2, "DDNotifyModeSet, object %08lx", pdrv );
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FetchDirectDrawData( pdrv, TRUE, 0 );
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DPF( 2, "DDNotifyModeSet DONE" );
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} /* DDNotifyModeSet */
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//#endif
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