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source: trunk/src/kernel32/HandleManager.cpp@ 114

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Last change on this file since 114 was 114, checked in by phaller, 26 years ago
Fix: preparing support for HandleManager on kernel objects
File size: 53.4 KB

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1	/* $Id: HandleManager.cpp,v 1.4 1999-06-17 21:52:00 phaller Exp $ */
2
3	/*
4	*
5	* Project Odin Software License can be found in LICENSE.TXT
6	*
7	*/
8	/*
9	* Win32 Unified Handle Manager for OS/2
10	*
11	* 1998/02/11 PH Patrick Haller (haller@zebra.fh-weingarten.de)
12	*
13	* @(#) HandleManager.Cpp 1.0.0 1998/02/11 PH start
14	*/
15
16	#undef DEBUG_LOCAL
17	//#define DEBUG_LOCAL
18
19
20	/*****************************************************************************
21	* Remark *
22	*****************************************************************************
23
24	1998/02/11 PH Even overlapped I/O could be simulated by another subsystem
25	thread with a request queue. We'll see if required ...
26
27
28	Flush (flush handle buffer)
29	WaitForSingleObject
30	WaitForMultipleObjects (?)
31
32	1998/02/12 PH IBM and Microsoft disagree about the definition of FILE_TYPE_xxx
33	Interesting, Open32 returns Microsoft's values ...
34
35	1998/02/12 PH Handles should be equipped with a locking mechanism, in particular
36	as we publish a pointer into the handle table via HMHandleQueryHandleData
37
38	*/
39
40
41	/*****************************************************************************
42	* Includes *
43	*****************************************************************************/
44
45	#include <os2win.h>
46	#include <stdlib.h>
47	#include <string.h>
48	#include "unicode.h"
49	#include "misc.h"
50
51	#include "HandleManager.H"
52	#include "HMDevice.h"
53	#include "HMOpen32.h"
54
55
56	/*****************************************************************************
57	* Defines *
58	*****************************************************************************/
59
60	/* this is the size of our currently static handle table */
61	#define MAX_OS2_HMHANDLES 256
62
63	/* this is for the handle translation table, could by dynamic though */
64	#define MAX_TRANSLATION_HANDLES 8192
65
66
67
68	/*****************************************************************************
69	* Structures *
70	*****************************************************************************/
71
72
73	typedef struct _HMHANDLE
74	{
75	HMDeviceHandler pDeviceHandler; / handler for this pseudo-device */
76	HMHANDLEDATA hmHandleData; /* attributes of the handle */
77	} HMHANDLE, *PHMHANDLE;
78
79
80	typedef struct _HMDEVICE
81	{
82	struct _HMDEVICE pNext; / pointer to next device in chain */
83
84	PSZ pszDeviceName; /* name or alias of the pseudo-device */
85	HMDeviceHandler pDeviceHandler; / handler for this pseudo-device */
86	} HMDEVICE, *PHMDEVICE;
87
88
89	typedef struct _HMTRANSHANDLE
90	{
91	/* @@@PH
92	UCHAR ucSubsystemID; to determine "lost" handles
93	*/
94	/* the index position in the array is the 16bit windows part of the handle */
95	ULONG hHandle32; /* 32-bit OS/2 part of the handle */
96	} HMTRANSHANDLE, *PHMTRANSHANDLE;
97
98
99	/*****************************************************************************
100	* This pseudo-device logs all device requests to the logfile and returns *
101	* ERROR_INVALID_FUNCTION to virtually all requests -> debugging *
102	*****************************************************************************/
103	class HMDeviceDebugClass : public HMDeviceHandler
104	{
105	public:
106	HMDeviceDebugClass(LPCSTR lpDeviceName) : HMDeviceHandler(lpDeviceName) {}
107	};
108
109
110	/*****************************************************************************
111	* Process Global Structures *
112	*****************************************************************************/
113
114
115	/* the device name is repeated here to enable device alias names */
116	static PHMDEVICE TabWin32Devices = NULL;
117	static HMHANDLE TabWin32Handles[MAX_OS2_HMHANDLES]; /* static handle table */
118
119
120	struct _HMGlobals
121	{
122	HANDLE hStandardIn; /* stdin handle to CONIN$ */
123	HANDLE hStandardOut; /* stdout handle to CONOUT$ */
124	HANDLE hStandardError; /* stderr handle to CONOUT$ */
125
126	BOOL fIsInitialized; /* if HM is initialized already ? */
127	/* this MUST !!! be false initially */
128
129	HMDeviceHandler pHMOpen32; / default handle manager instance */
130
131
132	ULONG ulHandleLast; /* index of last used handle */
133	HMTRANSHANDLE TabTranslationHandles[MAX_TRANSLATION_HANDLES];
134	} HMGlobals;
135
136
137	/*****************************************************************************
138	* Local Prototypes *
139	*****************************************************************************/
140
141	/* get appropriate device handler by the device name */
142	static HMDeviceHandler *_HMDeviceFind(PSZ pszDeviceName);
143
144	/* get next free handle from the handle table */
145	static int _HMHandleGetFree(void);
146
147	/* get handle table entry from handle */
148	static int _HMHandleQuery(HANDLE hHandle);
149
150
151
152	/*****************************************************************************
153	* Name : static HMDeviceHandler * _HMDeviceFind
154	* Purpose : obtain appropriate device handler from the table by searching
155	* for a device name or alias
156	* Parameters: PSZ pszDeviceName
157	* Variables :
158	* Result : HMDeviceHandler * - pointer to the handler object
159	* Remark :
160	* Status :
161	*
162	* Author : Patrick Haller [Wed, 1998/02/11 20:42]
163	*****************************************************************************/
164
165	static HMDeviceHandler *_HMDeviceFind (PSZ pszDeviceName)
166	{
167	PHMDEVICE pHMDevice; /* iterator over the device table */
168
169	if (pszDeviceName != NULL)
170	for (pHMDevice = TabWin32Devices; /* loop over all devices in the table */
171	pHMDevice != NULL;
172	pHMDevice = pHMDevice->pNext)
173	{
174	if (stricmp(pHMDevice->pszDeviceName, /* case-insensitive search */
175	pszDeviceName) == 0)
176	return (pHMDevice->pDeviceHandler); /* OK, we've found our device */
177	}
178
179	return (HMGlobals.pHMOpen32); /* haven't found anything, return default */
180	}
181
182
183	/*****************************************************************************
184	* Name : static int _HMHandleGetFree
185	* Purpose : get index to first free handle in the handle table
186	* Parameters:
187	* Variables :
188	* Result : int iIndex - index to the table or -1 in case of error
189	* Remark :
190	* Status :
191	*
192	* Author : Patrick Haller [Wed, 1998/02/11 20:43]
193	*****************************************************************************/
194
195	static int _HMHandleGetFree(void)
196	{
197	int iLoop;
198
199	for (iLoop = 0;
200	iLoop < MAX_OS2_HMHANDLES;
201	iLoop++)
202	{
203	/* free handle found ? */
204	if (0 == TabWin32Handles[iLoop].hmHandleData.hHMHandle)
205	return (iLoop); /* OK, then return it to the caller */
206	}
207
208	return (-1); /* haven't found any free handle */
209	}
210
211
212	/*****************************************************************************
213	* Name : static int _HMHandleQuery
214	* Purpose : gets the index of handle table entry as fast as possible from
215	* the specified handle
216	* Parameters: HANDLE hHandle
217	* Variables :
218	* Result : index or -1 in case of error
219	* Remark :
220	* Status :
221	*
222	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
223	*****************************************************************************/
224
225	static int _HMHandleQuery(HANDLE hHandle)
226	{
227	ULONG ulIndex; /* index into the handle table */
228
229	/* check the handle */
230	ulIndex = hHandle & ~HM_HANDLE_MASK; /* mask out the signature bits */
231	if (ulIndex != HM_HANDLE_ID) /* one of our handles ? */
232	return (-1); /* nope, ERROR_INVALID_HANDLE */
233
234	ulIndex = hHandle & HM_HANDLE_MASK; /* get the relevant bits */
235	if (ulIndex > MAX_OS2_HMHANDLES) /* check the table range */
236	return (-1); /* nope, ERROR_INVALID_HANDLE */
237
238	/* Oops, invalid handle ! */
239	if (TabWin32Handles[ulIndex].hmHandleData.hHMHandle != hHandle)
240	return (-1); /* nope, ERROR_INVALID_HANDLE */
241
242	return ( (int) ulIndex); /* OK, we've got our handle index */
243	}
244
245
246	/*****************************************************************************
247	* Name : DWORD HMDeviceRegister
248	* Purpose : register a device with the handle manager
249	* Parameters: PSZ pszDeviceName
250	* HMDeviceHandler *pDeviceHandler
251	* Variables :
252	* Result : API returncode
253	* Remark :
254	* Status :
255	*
256	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
257	*****************************************************************************/
258
259	DWORD HMDeviceRegister(PSZ pszDeviceName,
260	HMDeviceHandler *pDeviceHandler)
261	{
262	PHMDEVICE pHMDevice; /* our new device to be allocated */
263
264	if ( (pszDeviceName == NULL) \|\| /* check parameters */
265	(pDeviceHandler == NULL) )
266	return (ERROR_INVALID_PARAMETER); /* raise error conditon */
267
268
269	pHMDevice = (PHMDEVICE) malloc (sizeof (HMDEVICE) ); /* allocate memory */
270	if (pHMDevice == NULL) /* check proper allocation */
271	return (ERROR_NOT_ENOUGH_MEMORY); /* signal error */
272
273	pHMDevice->pszDeviceName = strdup(pszDeviceName); /* copy name */
274	if (pHMDevice->pszDeviceName == NULL) /* check proper allocation */
275	{
276	free (pHMDevice); /* free previously allocated memory */
277	return (ERROR_NOT_ENOUGH_MEMORY); /* signal error */
278	}
279
280	pHMDevice->pDeviceHandler = pDeviceHandler; /* store pointer to device */
281	pHMDevice->pNext = TabWin32Devices; /* establish linkage */
282
283	TabWin32Devices = pHMDevice; /* insert new node as root in the list */
284
285	return (NO_ERROR);
286	}
287
288
289	/*****************************************************************************
290	* Name : DWORD HMInitialize
291	* Purpose : Initialize the handlemanager
292	* Parameters: -
293	* Variables : -
294	* Result : always NO_ERROR
295	* Remark : this routine just stores the standard handles in the
296	* internal table within the HandleManager
297	* Status :
298	*
299	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
300	*****************************************************************************/
301
302	DWORD HMInitialize(void)
303	{
304	if (HMGlobals.fIsInitialized != TRUE)
305	{
306	HMGlobals.fIsInitialized = TRUE; /* OK, done */
307
308	dprintf(("KERNEL32:HandleManager:HMInitialize() storing handles.\n"));
309
310	memset(&HMGlobals, /* zero out the structure first */
311	0,
312	sizeof(HMGlobals));
313
314	/* copy standard handles from OS/2's Open32 Subsystem */
315	HMSetStdHandle(STD_INPUT_HANDLE, GetStdHandle(STD_INPUT_HANDLE));
316	HMSetStdHandle(STD_OUTPUT_HANDLE, GetStdHandle(STD_OUTPUT_HANDLE));
317	HMSetStdHandle(STD_ERROR_HANDLE, GetStdHandle(STD_ERROR_HANDLE));
318
319	/* create handle manager instance for Open32 handles */
320	HMGlobals.pHMOpen32 = new HMDeviceOpen32Class("\\\\.\\");
321	}
322	return (NO_ERROR);
323	}
324
325
326	/*****************************************************************************
327	* Name : DWORD HMTerminate
328	* Purpose : Terminate the handlemanager
329	* Parameters:
330	* Variables :
331	* Result :
332	* Remark :
333	* Status :
334	*
335	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
336	*****************************************************************************/
337
338	DWORD HMTerminate(void)
339	{
340	/* @@@PH we could deallocate the device list here */
341
342	return (NO_ERROR);
343	}
344
345
346	/*****************************************************************************/
347	/* handle translation buffer management */
348	/* */
349	/* Since some Win32 applications rely (!) on 16-bit handles, we've got to do */
350	/* 32-bit to 16-bit and vs vsa translation here. */
351	/* Filehandle-based functions should be routed via the handlemanager instead */
352	/* of going to Open32 directly. */
353	/*****************************************************************************/
354
355
356	/*****************************************************************************
357	* Name : DWORD HMHandleAllocate
358	* Purpose : allocate a handle in the translation table
359	* Parameters: PULONG pHandle16 - to return the allocated handle
360	* ULONG hHandle32 - the associated OS/2 handle
361	* Variables :
362	* Result : API returncode
363	* Remark : no parameter checking is done, phHandle may not be invalid
364	* hHandle32 shouldn't be 0
365	* Status :
366	*
367	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
368	*****************************************************************************/
369
370	DWORD HMHandleAllocate (PULONG phHandle16,
371	ULONG hHandle32)
372	{
373	register ULONG ulHandle;
374
375	#ifdef DEBUG_LOCAL
376	dprintf(("KERNEL32: HMHandleAllocate (%08xh,%08xh)\n",
377	phHandle16,
378	hHandle32));
379	#endif
380
381	ulHandle = HMGlobals.ulHandleLast; /* get free handle */
382
383	do
384	{
385	/* check if handle is free */
386	if (HMGlobals.TabTranslationHandles[ulHandle].hHandle32 == 0)
387	{
388	*phHandle16 = ulHandle;
389	HMGlobals.TabTranslationHandles[ulHandle].hHandle32 = hHandle32;
390	HMGlobals.ulHandleLast = ulHandle; /* to shorten search times */
391
392	return (NO_ERROR); /* OK */
393	}
394
395	ulHandle++; /* skip to next entry */
396
397	if (ulHandle >= MAX_TRANSLATION_HANDLES) /* check boundary */
398	ulHandle = 0;
399	}
400	while (ulHandle != HMGlobals.ulHandleLast);
401
402	return (ERROR_TOO_MANY_OPEN_FILES); /* OK, we're done */
403	}
404
405
406	/*****************************************************************************
407	* Name : DWORD HMHandleFree
408	* Purpose : free a handle from the translation table
409	* Parameters: ULONG hHandle16 - the handle to be freed
410	* Variables :
411	* Result : API returncode
412	* Remark : no parameter checking is done, hHandle16 MAY NEVER exceed
413	* the MAX_TRANSLATION_HANDLES boundary
414	* Status :
415	*
416	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
417	*****************************************************************************/
418
419	DWORD HMHandleFree (ULONG hHandle16)
420	{
421	ULONG rc; /* API returncode */
422
423	#ifdef DEBUG_LOCAL
424	dprintf(("KERNEL32: HMHandleFree (%08xh)\n",
425	hHandle16));
426	#endif
427
428	rc = HMHandleValidate(hHandle16); /* verify handle */
429	if (rc != NO_ERROR) /* check errors */
430	return (rc); /* raise error condition */
431
432	HMGlobals.TabTranslationHandles[hHandle16].hHandle32 = 0; /* OK, done */
433
434	return (NO_ERROR);
435	}
436
437
438	/*****************************************************************************
439	* Name : DWORD HMHandleValidate
440	* Purpose : validate a handle through the translation table
441	* Parameters: ULONG hHandle16 - the handle to be verified
442	* Variables :
443	* Result : API returncode
444	* Remark :
445	* Status :
446	*
447	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
448	*****************************************************************************/
449
450	DWORD HMHandleValidate (ULONG hHandle16)
451	{
452	#ifdef DEBUG_LOCAL
453	dprintf(("KERNEL32: HMHandleValidate (%08xh)\n",
454	hHandle16));
455	#endif
456
457	if (hHandle16 >= MAX_TRANSLATION_HANDLES) /* check boundary */
458	return (ERROR_INVALID_HANDLE); /* raise error condition */
459
460	if (HMGlobals.TabTranslationHandles[hHandle16].hHandle32 == 0) /* valid ? */
461	return (ERROR_INVALID_HANDLE); /* raise error condition */
462
463	return (NO_ERROR);
464	}
465
466
467	/*****************************************************************************
468	* Name : DWORD HMHandleTranslateToWin
469	* Purpose : translate a 32-bit OS/2 handle to the associated windows handle
470	* Parameters: ULONG hHandle32 - the OS/2 handle
471	* PULONG phHandle16 - the associated windows handle
472	* Variables :
473	* Result : API returncode
474	* Remark :
475	* Status :
476	*
477	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
478	*****************************************************************************/
479
480	DWORD HMHandleTranslateToWin (ULONG hHandle32,
481	PULONG phHandle16)
482	{
483	ULONG rc; /* API returncode */
484	register ULONG ulIndex; /* index counter over the table */
485
486	#ifdef DEBUG_LOCAL
487	dprintf(("KERNEL32: HMHandleTranslateToWin (%08xh, %08xh)\n",
488	hHandle32,
489	phHandle16));
490	#endif
491
492	for (ulIndex = 0;
493	ulIndex < MAX_TRANSLATION_HANDLES;
494	ulIndex++)
495	{
496	/* look for the handle */
497	if (HMGlobals.TabTranslationHandles[ulIndex].hHandle32 == hHandle32)
498	{
499	phHandle16 = ulIndex; / deliver result */
500	return (NO_ERROR); /* OK */
501	}
502	}
503
504	return (ERROR_INVALID_HANDLE); /* raise error condition */
505	}
506
507
508	/*****************************************************************************
509	* Name : DWORD HMHandleTranslateToOS2
510	* Purpose : translate a 16-bit Win32 handle to the associated OS/2 handle
511	* Parameters: ULONG hHandle16 - the windows handle
512	* PULONG phHandle32 - the associated OS/2 handle
513	* Variables :
514	* Result : API returncode
515	* Remark :
516	* Status :
517	*
518	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
519	*****************************************************************************/
520
521	DWORD HMHandleTranslateToOS2 (ULONG hHandle16,
522	PULONG phHandle32)
523	{
524	#ifdef DEBUG_LOCAL
525	dprintf(("KERNEL32: HMHandleTranslateToOS2 (%08xh, %08xh)\n",
526	hHandle16,
527	phHandle32));
528	#endif
529
530	if (HMHandleValidate(hHandle16) == NO_ERROR) /* verify handle */
531	{
532	*phHandle32 = HMGlobals.TabTranslationHandles[hHandle16].hHandle32;
533	return (NO_ERROR);
534	}
535
536	return (ERROR_INVALID_HANDLE); /* raise error condition */
537	}
538
539
540	/*****************************************************************************
541	* Name : DWORD HMHandleTranslateToOS2i
542	* Purpose : translate a 16-bit Win32 handle to the associated OS/2 handle
543	* Parameters: ULONG hHandle16 - the windows handle
544	* Variables :
545	* Result : OS/2 handle
546	* Remark : no checkinf
547	* Status :
548	*
549	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
550	*****************************************************************************/
551
552	DWORD HMHandleTranslateToOS2i (ULONG hHandle16)
553	{
554	#ifdef DEBUG_LOCAL
555	dprintf(("KERNEL32: HMHandleTranslateToOS2i (%08xh)\n",
556	hHandle16));
557	#endif
558
559	return(HMGlobals.TabTranslationHandles[hHandle16].hHandle32);
560	}
561
562
563
564	/*****************************************************************************
565	* Name : HANDLE _HMGetStdHandle
566	* Purpose : replacement for Open32's GetStdHandle function
567	* Parameters: DWORD nStdHandle
568	* Variables :
569	* Result : HANDLE to standard device
570	* Remark :
571	* Status :
572	*
573	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
574	*****************************************************************************/
575
576	HANDLE HMGetStdHandle(DWORD nStdHandle)
577	{
578	switch (nStdHandle)
579	{
580	case STD_INPUT_HANDLE: return (HMGlobals.hStandardIn);
581	case STD_OUTPUT_HANDLE: return (HMGlobals.hStandardOut);
582	case STD_ERROR_HANDLE: return (HMGlobals.hStandardError);
583
584	default:
585	{
586	SetLastError(ERROR_INVALID_PARAMETER); /* set error information */
587	return (INVALID_HANDLE_VALUE); /* raise error condition */
588	}
589	}
590	}
591
592
593	/*****************************************************************************
594	* Name : HANDLE _HMSetStdHandle
595	* Purpose : replacement for Open32's SetStdHandle function
596	* Parameters: DWORD nStdHandle
597	* HANDLE hHandle
598	* Variables :
599	* Result : BOOL fSuccess
600	* Remark :
601	* Status :
602	*
603	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
604	*****************************************************************************/
605
606	BOOL HMSetStdHandle(DWORD nStdHandle,
607	HANDLE hHandle)
608	{
609	switch (nStdHandle)
610	{
611	case STD_INPUT_HANDLE: HMGlobals.hStandardIn = hHandle; return TRUE;
612	case STD_OUTPUT_HANDLE: HMGlobals.hStandardOut = hHandle; return TRUE;
613	case STD_ERROR_HANDLE: HMGlobals.hStandardError = hHandle; return TRUE;
614
615	default:
616	{
617	SetLastError(ERROR_INVALID_PARAMETER); /* set error information */
618	return (FALSE); /* raise error condition */
619	}
620	}
621	}
622
623
624	/*****************************************************************************
625	* Name : HANDLE HMCreateFile
626	* Purpose : Wrapper for the CreateFile() API
627	* Parameters:
628	* Variables :
629	* Result :
630	* Remark : Fix parameters passed to the HMDeviceManager::CreateFile
631	* Supply access mode and share mode validation routines
632	* Status :
633	*
634	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
635	*****************************************************************************/
636
637	HFILE HMCreateFile(LPCSTR lpFileName,
638	DWORD dwDesiredAccess,
639	DWORD dwShareMode,
640	LPSECURITY_ATTRIBUTES lpSecurityAttributes,
641	DWORD dwCreationDisposition,
642	DWORD dwFlagsAndAttributes,
643	HANDLE hTemplateFile)
644	{
645	int iIndex; /* index into the handle table */
646	int iIndexNew; /* index into the handle table */
647	HMDeviceHandler pDeviceHandler; / device handler for this handle */
648	HANDLE hResult;
649	DWORD rc; /* API return code */
650	PHMHANDLEDATA pHMHandleData;
651	HMHANDLEDATA HMHandleTemp; /* temporary buffer for handle data */
652
653	/* create new handle by either lpFileName or hTemplateFile */
654	if (lpFileName == NULL) /* this indicates creation from template */
655	{
656	iIndex = _HMHandleQuery(hTemplateFile); /* query table for template */
657	if (-1 == iIndex) /* this device is unknown to us */
658	{
659	SetLastError (ERROR_INVALID_HANDLE);
660	return INVALID_HANDLE_VALUE;
661	}
662	else
663	{
664	/* to pass to handler */
665	pHMHandleData = &TabWin32Handles[iIndex].hmHandleData;
666	pDeviceHandler = TabWin32Handles[iIndex].pDeviceHandler;
667	}
668	}
669	else
670	{
671	pDeviceHandler = _HMDeviceFind((PSZ)lpFileName); /* find device */
672
673	if (NULL == pDeviceHandler) /* this name is unknown to us */
674	{
675	SetLastError(ERROR_FILE_NOT_FOUND);
676	return (INVALID_HANDLE_VALUE); /* signal error */
677	}
678	else
679	pHMHandleData = NULL;
680	}
681
682
683	iIndexNew = _HMHandleGetFree(); /* get free handle */
684	if (-1 == iIndexNew) /* oops, no free handles ! */
685	{
686	SetLastError(ERROR_NOT_ENOUGH_MEMORY); /* use this as error message */
687	return (INVALID_HANDLE_VALUE); /* signal error */
688	}
689
690
691	/* initialize the complete HMHANDLEDATA structure */
692	if (lpFileName == NULL) /* create from template */
693	memcpy (&TabWin32Handles[iIndexNew].hmHandleData,
694	&TabWin32Handles[iIndex].hmHandleData,
695	sizeof(HMHANDLEDATA));
696	else
697	{
698	HMHandleTemp.dwType = FILE_TYPE_UNKNOWN; /* unknown handle type */
699	HMHandleTemp.dwAccess = dwDesiredAccess;
700	HMHandleTemp.dwShare = dwShareMode;
701	HMHandleTemp.dwCreation = dwCreationDisposition;
702	HMHandleTemp.dwFlags = dwFlagsAndAttributes;
703	HMHandleTemp.lpHandlerData = NULL;
704	}
705
706	/* we've got to mark the handle as occupied here, since another device */
707	/* could be created within the device handler -> deadlock */
708
709	/* write appropriate entry into the handle table if open succeeded */
710	hResult = (ULONG)iIndexNew \| HM_HANDLE_ID;
711	HMHandleTemp.hHMHandle = hResult;
712	TabWin32Handles[iIndexNew].pDeviceHandler = pDeviceHandler;
713
714	/* now copy back our temporary handle data */
715	memcpy(&TabWin32Handles[iIndexNew].hmHandleData,
716	&HMHandleTemp,
717	sizeof(HMHANDLEDATA));
718
719	rc = pDeviceHandler->CreateFile(lpFileName, /* call the device handler */
720	&HMHandleTemp,
721	lpSecurityAttributes,
722	pHMHandleData);
723
724	#ifdef DEBUG_LOCAL
725	dprintf(("KERNEL32/HandleManager:CheckPoint2: %s lpHandlerData=%08xh\n",
726	lpFileName,
727	HMHandleTemp.lpHandlerData));
728	#endif
729
730	if (rc != NO_ERROR) /* oops, creation failed within the device handler */
731	{
732	TabWin32Handles[iIndexNew].hmHandleData.hHMHandle = INVALID_HANDLE_VALUE;
733	SetLastError(rc); /* Hehe, OS/2 and NT are pretty compatible :) */
734	return (INVALID_HANDLE_VALUE); /* signal error */
735	}
736	else
737	{
738	/* copy data fields that might have been modified by CreateFile */
739	memcpy(&TabWin32Handles[iIndexNew].hmHandleData,
740	&HMHandleTemp,
741	sizeof(HMHANDLEDATA));
742	}
743
744
745	#ifdef DEBUG_LOCAL
746	dprintf(("KERNEL32/HandleManager: CreateFile(%s)=%08xh\n",
747	lpFileName,
748	hResult));
749	#endif
750
751	return hResult; /* return valid handle */
752	}
753
754
755	/*****************************************************************************
756	* Name : HANDLE HMOpenFile
757	* Purpose : Wrapper for the OpenFile() API
758	* Parameters:
759	* Variables :
760	* Result :
761	* Remark : Fix parameters passed to the HMDeviceManager::OpenFile
762	* Supply access mode and share mode validation routines
763	* Status :
764	*
765	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
766	*****************************************************************************/
767
768
769	/***********************************************************************
770	* FILE_ConvertOFMode
771	*
772	* Convert OF_* mode into flags for CreateFile.
773	*/
774	static void FILE_ConvertOFMode( INT mode, DWORD access, DWORD sharing )
775	{
776	switch(mode & 0x03)
777	{
778	case OF_READ: *access = GENERIC_READ; break;
779	case OF_WRITE: *access = GENERIC_WRITE; break;
780	case OF_READWRITE: *access = GENERIC_READ \| GENERIC_WRITE; break;
781	default: *access = 0; break;
782	}
783	switch(mode & 0x70)
784	{
785	case OF_SHARE_EXCLUSIVE: *sharing = 0; break;
786	case OF_SHARE_DENY_WRITE: *sharing = FILE_SHARE_READ; break;
787	case OF_SHARE_DENY_READ: *sharing = FILE_SHARE_WRITE; break;
788	case OF_SHARE_DENY_NONE:
789	case OF_SHARE_COMPAT:
790	default: *sharing = FILE_SHARE_READ \| FILE_SHARE_WRITE; break;
791	}
792	}
793
794	HANDLE HMOpenFile(LPCSTR lpFileName,
795	OFSTRUCT* pOFStruct,
796	UINT fuMode)
797	{
798	int iIndex; /* index into the handle table */
799	int iIndexNew; /* index into the handle table */
800	HMDeviceHandler pDeviceHandler; / device handler for this handle */
801	HANDLE hResult;
802	PHMHANDLEDATA pHMHandleData;
803	DWORD rc; /* API return code */
804
805
806	pDeviceHandler = _HMDeviceFind((PSZ)lpFileName); /* find device */
807	if (NULL == pDeviceHandler) /* this name is unknown to us */
808	{
809	SetLastError(ERROR_FILE_NOT_FOUND);
810	return (INVALID_HANDLE_VALUE); /* signal error */
811	}
812	else
813	pHMHandleData = NULL;
814
815
816	iIndexNew = _HMHandleGetFree(); /* get free handle */
817	if (-1 == iIndexNew) /* oops, no free handles ! */
818	{
819	SetLastError(ERROR_NOT_ENOUGH_MEMORY); /* use this as error message */
820	return (INVALID_HANDLE_VALUE); /* signal error */
821	}
822
823
824	/* initialize the complete HMHANDLEDATA structure */
825	pHMHandleData = &TabWin32Handles[iIndexNew].hmHandleData;
826	pHMHandleData->dwType = FILE_TYPE_UNKNOWN; /* unknown handle type */
827
828	FILE_ConvertOFMode(fuMode, /* map OF_flags */
829	&pHMHandleData->dwAccess,
830	&pHMHandleData->dwShare);
831
832	pHMHandleData->dwCreation = 0;
833	pHMHandleData->dwFlags = 0;
834	pHMHandleData->lpHandlerData = NULL;
835
836
837	/* we've got to mark the handle as occupied here, since another device */
838	/* could be created within the device handler -> deadlock */
839
840	/* write appropriate entry into the handle table if open succeeded */
841	hResult = (ULONG)iIndexNew \| HM_HANDLE_ID;
842	TabWin32Handles[iIndexNew].hmHandleData.hHMHandle = hResult;
843	TabWin32Handles[iIndexNew].pDeviceHandler = pDeviceHandler;
844
845	rc = pDeviceHandler->OpenFile (lpFileName, /* call the device handler */
846	&TabWin32Handles[iIndexNew].hmHandleData,
847	pOFStruct,
848	fuMode);
849
850	#ifdef DEBUG_LOCAL
851	dprintf(("KERNEL32/HandleManager:CheckPoint3: %s lpHandlerData=%08xh\n",
852	lpFileName,
853	HMHandleTemp.lpHandlerData));
854	#endif
855
856	if (rc != NO_ERROR) /* oops, creation failed within the device handler */
857	{
858	TabWin32Handles[iIndexNew].hmHandleData.hHMHandle = INVALID_HANDLE_VALUE;
859	SetLastError(rc); /* Hehe, OS/2 and NT are pretty compatible :) */
860	return (INVALID_HANDLE_VALUE); /* signal error */
861	}
862
863	#ifdef DEBUG_LOCAL
864	dprintf(("KERNEL32/HandleManager: OpenFile(%s)=%08xh\n",
865	lpFileName,
866	hResult));
867	#endif
868
869	return hResult; /* return valid handle */
870	}
871
872
873
874	/*****************************************************************************
875	* Name : HANDLE HMCloseFile
876	* Purpose : Wrapper for the CloseHandle() API
877	* Parameters:
878	* Variables :
879	* Result :
880	* Remark :
881	* Status :
882	*
883	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
884	*****************************************************************************/
885
886	BOOL HMCloseHandle(HANDLE hObject)
887	{
888	int iIndex; /* index into the handle table */
889	BOOL fResult; /* result from the device handler's CloseHandle() */
890	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
891
892	/* validate handle */
893	iIndex = _HMHandleQuery(hObject); /* get the index */
894	if (-1 == iIndex) /* error ? */
895	{
896	//@@@PH it may occur someone closes e.g. a semaphore handle
897	// which is not registered through the HandleManager yet.
898	// so we try to pass on to Open32 instead.
899	dprintf(("KERNEL32: HandleManager:HMCloseHandle(%08xh) passed on to Open32.\n",
900	hObject));
901
902	fResult = O32_CloseHandle(hObject);
903	return (fResult);
904
905	//SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
906	//return (FALSE); /* signal failure */
907	}
908
909	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
910	fResult = pHMHandle->pDeviceHandler->CloseHandle(&pHMHandle->hmHandleData);
911
912	if (fResult == TRUE) /* remove handle if close succeeded */
913	pHMHandle->hmHandleData.hHMHandle = 0; /* mark handle as free */
914
915	return (fResult); /* deliver return code */
916	}
917
918
919	/*****************************************************************************
920	* Name : HANDLE HMReadFile
921	* Purpose : Wrapper for the ReadHandle() API
922	* Parameters:
923	* Variables :
924	* Result :
925	* Remark :
926	* Status :
927	*
928	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
929	*****************************************************************************/
930	BOOL HMReadFile(HANDLE hFile,
931	LPVOID lpBuffer,
932	DWORD nNumberOfBytesToRead,
933	LPDWORD lpNumberOfBytesRead,
934	LPOVERLAPPED lpOverlapped)
935	{
936	int iIndex; /* index into the handle table */
937	BOOL fResult; /* result from the device handler's CloseHandle() */
938	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
939
940	/* validate handle */
941	iIndex = _HMHandleQuery(hFile); /* get the index */
942	if (-1 == iIndex) /* error ? */
943	{
944	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
945	return (FALSE); /* signal failure */
946	}
947
948	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
949	fResult = pHMHandle->pDeviceHandler->ReadFile(&pHMHandle->hmHandleData,
950	lpBuffer,
951	nNumberOfBytesToRead,
952	lpNumberOfBytesRead,
953	lpOverlapped);
954
955	return (fResult); /* deliver return code */
956	}
957
958
959	/*****************************************************************************
960	* Name : HANDLE HMWriteFile
961	* Purpose : Wrapper for the WriteHandle() API
962	* Parameters:
963	* Variables :
964	* Result :
965	* Remark :
966	* Status :
967	*
968	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
969	*****************************************************************************/
970
971	BOOL HMWriteFile(HANDLE hFile,
972	LPCVOID lpBuffer,
973	DWORD nNumberOfBytesToWrite,
974	LPDWORD lpNumberOfBytesWritten,
975	LPOVERLAPPED lpOverlapped)
976	{
977	int iIndex; /* index into the handle table */
978	BOOL fResult; /* result from the device handler's CloseHandle() */
979	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
980
981	/* validate handle */
982	iIndex = _HMHandleQuery(hFile); /* get the index */
983	if (-1 == iIndex) /* error ? */
984	{
985	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
986	return (FALSE); /* signal failure */
987	}
988
989	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
990	fResult = pHMHandle->pDeviceHandler->WriteFile(&pHMHandle->hmHandleData,
991	lpBuffer,
992	nNumberOfBytesToWrite,
993	lpNumberOfBytesWritten,
994	lpOverlapped);
995
996	return (fResult); /* deliver return code */
997	}
998
999
1000	/*****************************************************************************
1001	* Name : HANDLE HMGetFileType
1002	* Purpose : Wrapper for the GetFileType() API
1003	* Parameters:
1004	* Variables :
1005	* Result :
1006	* Remark :
1007	* Status :
1008	*
1009	* Author : Patrick Haller [Wed, 1998/02/12 13:37]
1010	*****************************************************************************/
1011
1012	DWORD HMGetFileType(HANDLE hFile)
1013	{
1014	int iIndex; /* index into the handle table */
1015	DWORD dwResult; /* result from the device handler's API */
1016	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1017
1018	/* validate handle */
1019	iIndex = _HMHandleQuery(hFile); /* get the index */
1020	if (-1 == iIndex) /* error ? */
1021	{
1022	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1023	return (INVALID_HANDLE_ERROR); /* signal failure */
1024	}
1025
1026	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1027	dwResult = pHMHandle->pDeviceHandler->GetFileType(&pHMHandle->hmHandleData);
1028
1029	return (dwResult); /* deliver return code */
1030	}
1031
1032
1033	/*****************************************************************************
1034	* Name : HMDeviceHandler::_DeviceReuqest
1035	* Purpose : entry method for special request functions
1036	* Parameters: ULONG ulRequestCode
1037	* various parameters as required
1038	* Variables :
1039	* Result :
1040	* Remark : the standard behaviour is to return an error code for non-
1041	* existant request codes
1042	* Status :
1043	*
1044	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
1045	*****************************************************************************/
1046	DWORD HMDeviceRequest (HANDLE hFile,
1047	ULONG ulRequestCode,
1048	ULONG arg1,
1049	ULONG arg2,
1050	ULONG arg3,
1051	ULONG arg4)
1052	{
1053	int iIndex; /* index into the handle table */
1054	DWORD dwResult; /* result from the device handler's API */
1055	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1056
1057	/* validate handle */
1058	iIndex = _HMHandleQuery(hFile); /* get the index */
1059	if (-1 == iIndex) /* error ? */
1060	{
1061	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1062	return (INVALID_HANDLE_ERROR); /* signal failure */
1063	}
1064
1065	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1066	dwResult = pHMHandle->pDeviceHandler->_DeviceRequest(&pHMHandle->hmHandleData,
1067	ulRequestCode,
1068	arg1,
1069	arg2,
1070	arg3,
1071	arg4);
1072
1073	return (dwResult); /* deliver return code */
1074	}
1075
1076
1077	/*****************************************************************************
1078	* Name : HMDeviceHandler::GetFileInformationByHandle
1079	* Purpose : router function for GetFileInformationByHandle
1080	* Parameters:
1081	* Variables :
1082	* Result :
1083	* Remark :
1084	* Status :
1085	*
1086	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1087	*****************************************************************************/
1088	DWORD HMGetFileInformationByHandle (HANDLE hFile,
1089	BY_HANDLE_FILE_INFORMATION *pHFI)
1090	{
1091	int iIndex; /* index into the handle table */
1092	DWORD dwResult; /* result from the device handler's API */
1093	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1094
1095	/* validate handle */
1096	iIndex = _HMHandleQuery(hFile); /* get the index */
1097	if (-1 == iIndex) /* error ? */
1098	{
1099	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1100	return (INVALID_HANDLE_ERROR); /* signal failure */
1101	}
1102
1103	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1104	dwResult = pHMHandle->pDeviceHandler->GetFileInformationByHandle(&pHMHandle->hmHandleData,
1105	pHFI);
1106
1107	return (dwResult); /* deliver return code */
1108	}
1109
1110
1111
1112	/*****************************************************************************
1113	* Name : HMDeviceHandler::SetEndOfFile
1114	* Purpose : router function for SetEndOfFile
1115	* Parameters:
1116	* Variables :
1117	* Result :
1118	* Remark :
1119	* Status :
1120	*
1121	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1122	*****************************************************************************/
1123	BOOL HMSetEndOfFile (HANDLE hFile)
1124	{
1125	int iIndex; /* index into the handle table */
1126	BOOL bResult; /* result from the device handler's API */
1127	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1128
1129	/* validate handle */
1130	iIndex = _HMHandleQuery(hFile); /* get the index */
1131	if (-1 == iIndex) /* error ? */
1132	{
1133	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1134	return (INVALID_HANDLE_ERROR); /* signal failure */
1135	}
1136
1137	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1138	bResult = pHMHandle->pDeviceHandler->SetEndOfFile(&pHMHandle->hmHandleData);
1139
1140	return (bResult); /* deliver return code */
1141	}
1142
1143
1144	/*****************************************************************************
1145	* Name : HMDeviceHandler::SetFileTime
1146	* Purpose : router function for SetFileTime
1147	* Parameters:
1148	* Variables :
1149	* Result :
1150	* Remark :
1151	* Status :
1152	*
1153	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1154	*****************************************************************************/
1155	BOOL HMSetFileTime (HANDLE hFile,
1156	const FILETIME *pFT1,
1157	const FILETIME *pFT2,
1158	const FILETIME *pFT3)
1159	{
1160	int iIndex; /* index into the handle table */
1161	BOOL bResult; /* result from the device handler's API */
1162	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1163
1164	/* validate handle */
1165	iIndex = _HMHandleQuery(hFile); /* get the index */
1166	if (-1 == iIndex) /* error ? */
1167	{
1168	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1169	return (INVALID_HANDLE_ERROR); /* signal failure */
1170	}
1171
1172	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1173	bResult = pHMHandle->pDeviceHandler->SetFileTime(&pHMHandle->hmHandleData,
1174	(LPFILETIME)pFT1,
1175	(LPFILETIME)pFT2,
1176	(LPFILETIME)pFT3);
1177
1178	return (bResult); /* deliver return code */
1179	}
1180
1181
1182	/*****************************************************************************
1183	* Name : HMDeviceHandler::GetFileSize
1184	* Purpose : router function for GetFileSize
1185	* Parameters:
1186	* Variables :
1187	* Result :
1188	* Remark :
1189	* Status :
1190	*
1191	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1192	*****************************************************************************/
1193	DWORD HMGetFileSize (HANDLE hFile,
1194	PDWORD pSize)
1195	{
1196	int iIndex; /* index into the handle table */
1197	DWORD dwResult; /* result from the device handler's API */
1198	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1199
1200	/* validate handle */
1201	iIndex = _HMHandleQuery(hFile); /* get the index */
1202	if (-1 == iIndex) /* error ? */
1203	{
1204	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1205	return (INVALID_HANDLE_ERROR); /* signal failure */
1206	}
1207
1208	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1209	dwResult = pHMHandle->pDeviceHandler->GetFileSize(&pHMHandle->hmHandleData,
1210	pSize);
1211
1212	return (dwResult); /* deliver return code */
1213	}
1214
1215
1216	/*****************************************************************************
1217	* Name : HMDeviceHandler::SetFilePointer
1218	* Purpose : router function for SetFilePointer
1219	* Parameters:
1220	* Variables :
1221	* Result :
1222	* Remark :
1223	* Status :
1224	*
1225	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1226	*****************************************************************************/
1227	DWORD HMSetFilePointer (HANDLE hFile,
1228	LONG lDistanceToMove,
1229	PLONG lpDistanceToMoveHigh,
1230	DWORD dwMoveMethod)
1231	{
1232	int iIndex; /* index into the handle table */
1233	DWORD dwResult; /* result from the device handler's API */
1234	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1235
1236	/* validate handle */
1237	iIndex = _HMHandleQuery(hFile); /* get the index */
1238	if (-1 == iIndex) /* error ? */
1239	{
1240	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1241	return (INVALID_HANDLE_ERROR); /* signal failure */
1242	}
1243
1244	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1245	dwResult = pHMHandle->pDeviceHandler->SetFilePointer(&pHMHandle->hmHandleData,
1246	lDistanceToMove,
1247	lpDistanceToMoveHigh,
1248	dwMoveMethod);
1249
1250	return (dwResult); /* deliver return code */
1251	}
1252
1253
1254	/*****************************************************************************
1255	* Name : HMDeviceHandler::LockFile
1256	* Purpose : router function for LockFile
1257	* Parameters:
1258	* Variables :
1259	* Result :
1260	* Remark :
1261	* Status :
1262	*
1263	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1264	*****************************************************************************/
1265	BOOL HMLockFile (HFILE hFile,
1266	DWORD arg2,
1267	DWORD arg3,
1268	DWORD arg4,
1269	DWORD arg5)
1270	{
1271	int iIndex; /* index into the handle table */
1272	DWORD dwResult; /* result from the device handler's API */
1273	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1274
1275	/* validate handle */
1276	iIndex = _HMHandleQuery(hFile); /* get the index */
1277	if (-1 == iIndex) /* error ? */
1278	{
1279	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1280	return (INVALID_HANDLE_ERROR); /* signal failure */
1281	}
1282
1283	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1284	dwResult = pHMHandle->pDeviceHandler->LockFile(&pHMHandle->hmHandleData,
1285	arg2,
1286	arg3,
1287	arg4,
1288	arg5);
1289
1290	return (dwResult); /* deliver return code */
1291	}
1292
1293
1294	/*****************************************************************************
1295	* Name : HMDeviceHandler::LockFileEx
1296	* Purpose : router function for LockFileEx
1297	* Parameters:
1298	* Variables :
1299	* Result :
1300	* Remark :
1301	* Status :
1302	*
1303	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1304	*****************************************************************************/
1305	DWORD HMLockFileEx(HANDLE hFile,
1306	DWORD dwFlags,
1307	DWORD dwReserved,
1308	DWORD nNumberOfBytesToLockLow,
1309	DWORD nNumberOfBytesToLockHigh,
1310	LPOVERLAPPED lpOverlapped)
1311	{
1312	int iIndex; /* index into the handle table */
1313	DWORD dwResult; /* result from the device handler's API */
1314	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1315
1316	/* validate handle */
1317	iIndex = _HMHandleQuery(hFile); /* get the index */
1318	if (-1 == iIndex) /* error ? */
1319	{
1320	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1321	return (INVALID_HANDLE_ERROR); /* signal failure */
1322	}
1323
1324	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1325	dwResult = pHMHandle->pDeviceHandler->LockFileEx(&pHMHandle->hmHandleData,
1326	dwFlags,
1327	dwReserved,
1328	nNumberOfBytesToLockLow,
1329	nNumberOfBytesToLockHigh,
1330	lpOverlapped);
1331
1332	return (dwResult); /* deliver return code */
1333	}
1334
1335
1336
1337	/*****************************************************************************
1338	* Name : HMDeviceHandler::UnlockFile
1339	* Purpose : router function for UnlockFile
1340	* Parameters:
1341	* Variables :
1342	* Result :
1343	* Remark :
1344	* Status :
1345	*
1346	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1347	*****************************************************************************/
1348	BOOL HMUnlockFile (HFILE hFile,
1349	DWORD arg2,
1350	DWORD arg3,
1351	DWORD arg4,
1352	DWORD arg5)
1353	{
1354	int iIndex; /* index into the handle table */
1355	DWORD dwResult; /* result from the device handler's API */
1356	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1357
1358	/* validate handle */
1359	iIndex = _HMHandleQuery(hFile); /* get the index */
1360	if (-1 == iIndex) /* error ? */
1361	{
1362	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1363	return (INVALID_HANDLE_ERROR); /* signal failure */
1364	}
1365
1366	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1367	dwResult = pHMHandle->pDeviceHandler->UnlockFile(&pHMHandle->hmHandleData,
1368	arg2,
1369	arg3,
1370	arg4,
1371	arg5);
1372
1373	return (dwResult); /* deliver return code */
1374	}
1375
1376	/*****************************************************************************
1377	* Name : HMDeviceHandler::UnlockFileEx
1378	* Purpose : router function for UnlockFileEx
1379	* Parameters:
1380	* Variables :
1381	* Result :
1382	* Remark :
1383	* Status :
1384	*
1385	* Author : Patrick Haller [Wed, 1999/06/17 20:44]
1386	*****************************************************************************/
1387	BOOL HMUnlockFileEx(HANDLE hFile,
1388	DWORD dwFlags,
1389	DWORD dwReserved,
1390	DWORD nNumberOfBytesToLockLow,
1391	DWORD nNumberOfBytesToLockHigh,
1392	LPOVERLAPPED lpOverlapped)
1393	{
1394	int iIndex; /* index into the handle table */
1395	DWORD dwResult; /* result from the device handler's API */
1396	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
1397
1398	/* validate handle */
1399	iIndex = _HMHandleQuery(hFile); /* get the index */
1400	if (-1 == iIndex) /* error ? */
1401	{
1402	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
1403	return (INVALID_HANDLE_ERROR); /* signal failure */
1404	}
1405
1406	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
1407	dwResult = pHMHandle->pDeviceHandler->UnlockFileEx(&pHMHandle->hmHandleData,
1408	dwFlags,
1409	dwReserved,
1410	nNumberOfBytesToLockLow,
1411	nNumberOfBytesToLockHigh,
1412	lpOverlapped);
1413
1414	return (dwResult); /* deliver return code */
1415	}
1416

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