141 lines
2.8 KiB
C
141 lines
2.8 KiB
C
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/*++
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Copyright (c) 2000 Microsoft Corporation
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All rights reserved
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Module Name:
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dload.c
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Abstract:
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Handles delay load of the router, spoolss.dll
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Author:
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Steve Kiraly (SteveKi) 26-Oct-2000
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Environment:
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User Mode -Win32
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Revision History:
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--*/
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#include <windows.h>
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#include <rpc.h>
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#include <winspool.h>
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#include <offsets.h>
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#include <delayimp.h>
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#include "server.h"
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#include "winspl.h"
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#include "dload.h"
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PfnDliHook __pfnDliFailureHook = DelayLoadFailureHook;
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FARPROC
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LookupHandler(
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IN PDelayLoadInfo pDelayInfo
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)
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/*++
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Routine Description:
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This routine handle finding a delay load handler when a delay load library error
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occurrs. Currently this routine only handles failures for delay loading the router.
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The router is delay loaded for boot performance issues. When the router cannot be loaded
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it is fatal. Currently we simply terminate the process, it would be better to log an
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event prior to terminating but this would require event logging code which we only have in
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localspl.dll In the future we should build event logging code for all components. Server,
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router, and all print providers.
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Arguments:
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pDelayInfo - pointer to delay load information, i.e. dll name
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procedure name etc.
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Return Value:
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NULL procedure address
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Note:
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--*/
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{
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//
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// If the router cannot be loaded or a procedure address cannot be found then
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// terminate not much else can be done, the router is a critical comonent of the
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// spooler process it must be available.
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//
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if (!_stricmp(pDelayInfo->szDll, "spoolss.dll"))
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{
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#if DBG
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OutputDebugString(L"Delay load module or address not found in spoolss.dll.\n");
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DebugBreak();
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#endif
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ExitProcess(-1);
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}
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return NULL;
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}
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FARPROC
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WINAPI
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DelayLoadFailureHook(
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IN UINT unReason,
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IN PDelayLoadInfo pDelayInfo
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)
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/*++
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Routine Description:
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Called when a delay loaded library or procedure address fails.
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Arguments:
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unReason - reason for delay load failure
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pDelayInfo - pointer to delay load failure information
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Return Value:
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The procedure or module handle
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Note:
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--*/
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{
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FARPROC ReturnValue = NULL;
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switch(unReason)
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{
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//
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// For a failed LoadLibrary, we will return the HINSTANCE of this module.
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// This will cause the loader to try a GetProcAddress in this module for the
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// function. This will subsequently fail and then we will be called
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// for dliFailGetProc below.
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//
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case dliFailLoadLib:
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ReturnValue = (FARPROC)GetModuleHandle(NULL);
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break;
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//
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// Try to find an error handler for this DLL/procedure.
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//
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case dliFailGetProc:
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ReturnValue = LookupHandler(pDelayInfo);
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break;
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//
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// Unknown reason failure.
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//
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default:
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break;
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}
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return ReturnValue;
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}
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