Context Navigation

source: trunk/src/kernel32/HandleManager.cpp@ 27

Visit:

Last change on this file since 27 was 17, checked in by phaller, 26 years ago
Code cleanup #1 for build, mainly addresses linkage problems
File size: 40.9 KB

Line
1	/* $Id: HandleManager.cpp,v 1.2 1999-05-31 22:08:08 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
53	#include <string.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
130	ULONG ulHandleLast; /* index of last used handle */
131	HMTRANSHANDLE TabTranslationHandles[MAX_TRANSLATION_HANDLES];
132	} HMGlobals;
133
134
135	/*****************************************************************************
136	* Local Prototypes *
137	*****************************************************************************/
138
139	/* get appropriate device handler by the device name */
140	static HMDeviceHandler *_HMDeviceFind(PSZ pszDeviceName);
141
142	/* get next free handle from the handle table */
143	static int _HMHandleGetFree(void);
144
145	/* get handle table entry from handle */
146	static int _HMHandleQuery(HANDLE hHandle);
147
148
149
150	/*****************************************************************************
151	* Name : static HMDeviceHandler * _HMDeviceFind
152	* Purpose : obtain appropriate device handler from the table by searching
153	* for a device name or alias
154	* Parameters: PSZ pszDeviceName
155	* Variables :
156	* Result : HMDeviceHandler * - pointer to the handler object
157	* Remark :
158	* Status :
159	*
160	* Author : Patrick Haller [Wed, 1998/02/11 20:42]
161	*****************************************************************************/
162
163	static HMDeviceHandler *_HMDeviceFind (PSZ pszDeviceName)
164	{
165	PHMDEVICE pHMDevice; /* iterator over the device table */
166
167	for (pHMDevice = TabWin32Devices; /* loop over all devices in the table */
168	pHMDevice != NULL;
169	pHMDevice = pHMDevice->pNext)
170	{
171	if (stricmp(pHMDevice->pszDeviceName, /* case-insensitive search */
172	pszDeviceName) == 0)
173	return (pHMDevice->pDeviceHandler); /* OK, we've found our device */
174	}
175
176	return ((HMDeviceHandler ) NULL); / haven't found anything */
177	}
178
179
180	/*****************************************************************************
181	* Name : static int _HMHandleGetFree
182	* Purpose : get index to first free handle in the handle table
183	* Parameters:
184	* Variables :
185	* Result : int iIndex - index to the table or -1 in case of error
186	* Remark :
187	* Status :
188	*
189	* Author : Patrick Haller [Wed, 1998/02/11 20:43]
190	*****************************************************************************/
191
192	static int _HMHandleGetFree(void)
193	{
194	int iLoop;
195
196	for (iLoop = 0;
197	iLoop < MAX_OS2_HMHANDLES;
198	iLoop++)
199	{
200	/* free handle found ? */
201	if (0 == TabWin32Handles[iLoop].hmHandleData.hHandle)
202	return (iLoop); /* OK, then return it to the caller */
203	}
204
205	return (-1); /* haven't found any free handle */
206	}
207
208
209	/*****************************************************************************
210	* Name : static int _HMHandleQuery
211	* Purpose : gets the index of handle table entry as fast as possible from
212	* the specified handle
213	* Parameters: HANDLE hHandle
214	* Variables :
215	* Result : index or -1 in case of error
216	* Remark :
217	* Status :
218	*
219	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
220	*****************************************************************************/
221
222	static int _HMHandleQuery(HANDLE hHandle)
223	{
224	ULONG ulIndex; /* index into the handle table */
225
226	/* check the handle */
227	ulIndex = hHandle & ~HM_HANDLE_MASK; /* mask out the signature bits */
228	if (ulIndex != HM_HANDLE_ID) /* one of our handles ? */
229	return (-1); /* nope, ERROR_INVALID_HANDLE */
230
231	ulIndex = hHandle & HM_HANDLE_MASK; /* get the relevant bits */
232	if (ulIndex > MAX_OS2_HMHANDLES) /* check the table range */
233	return (-1); /* nope, ERROR_INVALID_HANDLE */
234
235	/* Oops, invalid handle ! */
236	if (TabWin32Handles[ulIndex].hmHandleData.hHandle != hHandle)
237	return (-1); /* nope, ERROR_INVALID_HANDLE */
238
239	return ( (int) ulIndex); /* OK, we've got our handle index */
240	}
241
242
243	/*****************************************************************************
244	* Name : DWORD HMDeviceRegister
245	* Purpose : register a device with the handle manager
246	* Parameters: PSZ pszDeviceName
247	* HMDeviceHandler *pDeviceHandler
248	* Variables :
249	* Result : API returncode
250	* Remark :
251	* Status :
252	*
253	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
254	*****************************************************************************/
255
256	DWORD HMDeviceRegister(PSZ pszDeviceName,
257	HMDeviceHandler *pDeviceHandler)
258	{
259	PHMDEVICE pHMDevice; /* our new device to be allocated */
260
261	if ( (pszDeviceName == NULL) \|\| /* check parameters */
262	(pDeviceHandler == NULL) )
263	return (ERROR_INVALID_PARAMETER); /* raise error conditon */
264
265
266	pHMDevice = (PHMDEVICE) malloc (sizeof (HMDEVICE) ); /* allocate memory */
267	if (pHMDevice == NULL) /* check proper allocation */
268	return (ERROR_NOT_ENOUGH_MEMORY); /* signal error */
269
270	pHMDevice->pszDeviceName = strdup(pszDeviceName); /* copy name */
271	if (pHMDevice->pszDeviceName == NULL) /* check proper allocation */
272	{
273	free (pHMDevice); /* free previously allocated memory */
274	return (ERROR_NOT_ENOUGH_MEMORY); /* signal error */
275	}
276
277	pHMDevice->pDeviceHandler = pDeviceHandler; /* store pointer to device */
278	pHMDevice->pNext = TabWin32Devices; /* establish linkage */
279
280	TabWin32Devices = pHMDevice; /* insert new node as root in the list */
281
282	return (NO_ERROR);
283	}
284
285
286	/*****************************************************************************
287	* Name : DWORD HMInitialize
288	* Purpose : Initialize the handlemanager
289	* Parameters: -
290	* Variables : -
291	* Result : always NO_ERROR
292	* Remark : this routine just stores the standard handles in the
293	* internal table within the HandleManager
294	* Status :
295	*
296	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
297	*****************************************************************************/
298
299	DWORD HMInitialize(void)
300	{
301	if (HMGlobals.fIsInitialized != TRUE)
302	{
303	dprintf(("KERNEL32:HandleManager:HMInitialize() storing handles.\n"));
304
305	memset(&HMGlobals, /* zero out the structure first */
306	0,
307	sizeof(HMGlobals));
308
309	/* copy standard handles from OS/2's Open32 Subsystem */
310	HMSetStdHandle(STD_INPUT_HANDLE, GetStdHandle(STD_INPUT_HANDLE));
311	HMSetStdHandle(STD_OUTPUT_HANDLE, GetStdHandle(STD_OUTPUT_HANDLE));
312	HMSetStdHandle(STD_ERROR_HANDLE, GetStdHandle(STD_ERROR_HANDLE));
313
314	HMGlobals.fIsInitialized = TRUE; /* OK, done */
315	}
316	return (NO_ERROR);
317	}
318
319
320	/*****************************************************************************
321	* Name : DWORD HMTerminate
322	* Purpose : Terminate the handlemanager
323	* Parameters:
324	* Variables :
325	* Result :
326	* Remark :
327	* Status :
328	*
329	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
330	*****************************************************************************/
331
332	DWORD HMTerminate(void)
333	{
334	/* @@@PH we could deallocate the device list here */
335
336	return (NO_ERROR);
337	}
338
339
340	/*****************************************************************************
341	* Name : HANDLE _HMGetStdHandle
342	* Purpose : replacement for Open32's GetStdHandle function
343	* Parameters: DWORD nStdHandle
344	* Variables :
345	* Result : HANDLE to standard device
346	* Remark :
347	* Status :
348	*
349	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
350	*****************************************************************************/
351
352	HANDLE HMGetStdHandle(DWORD nStdHandle)
353	{
354	switch (nStdHandle)
355	{
356	case STD_INPUT_HANDLE: return (HMGlobals.hStandardIn);
357	case STD_OUTPUT_HANDLE: return (HMGlobals.hStandardOut);
358	case STD_ERROR_HANDLE: return (HMGlobals.hStandardError);
359
360	default:
361	{
362	SetLastError(ERROR_INVALID_PARAMETER); /* set error information */
363	return (INVALID_HANDLE_VALUE); /* raise error condition */
364	}
365	}
366	}
367
368
369	/*****************************************************************************
370	* Name : HANDLE _HMSetStdHandle
371	* Purpose : replacement for Open32's SetStdHandle function
372	* Parameters: DWORD nStdHandle
373	* HANDLE hHandle
374	* Variables :
375	* Result : BOOL fSuccess
376	* Remark :
377	* Status :
378	*
379	* Author : Patrick Haller [Wed, 1998/02/12 20:44]
380	*****************************************************************************/
381
382	BOOL HMSetStdHandle(DWORD nStdHandle,
383	HANDLE hHandle)
384	{
385	switch (nStdHandle)
386	{
387	case STD_INPUT_HANDLE: HMGlobals.hStandardIn = hHandle; return TRUE;
388	case STD_OUTPUT_HANDLE: HMGlobals.hStandardOut = hHandle; return TRUE;
389	case STD_ERROR_HANDLE: HMGlobals.hStandardError = hHandle; return TRUE;
390
391	default:
392	{
393	SetLastError(ERROR_INVALID_PARAMETER); /* set error information */
394	return (FALSE); /* raise error condition */
395	}
396	}
397	}
398
399
400	/*****************************************************************************
401	* Name : HANDLE HMCreateFile
402	* Purpose : Wrapper for the CreateFile() API
403	* Parameters:
404	* Variables :
405	* Result :
406	* Remark : Fix parameters passed to the HMDeviceManager::CreateFile
407	* Supply access mode and share mode validation routines
408	* Status :
409	*
410	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
411	*****************************************************************************/
412
413	HANDLE HMCreateFile(LPCSTR lpFileName,
414	DWORD dwDesiredAccess,
415	DWORD dwShareMode,
416	PVOID lpSecurityAttributes,
417	DWORD dwCreationDisposition,
418	DWORD dwFlagsAndAttributes,
419	HANDLE hTemplateFile)
420	{
421	int iIndex; /* index into the handle table */
422	int iIndexNew; /* index into the handle table */
423	HMDeviceHandler pDeviceHandler; / device handler for this handle */
424	HANDLE hResult;
425	DWORD rc; /* API return code */
426	PHMHANDLEDATA pHMHandleData;
427	HMHANDLEDATA HMHandleTemp; /* temporary buffer for handle data */
428
429	/* create new handle by either lpFileName or hTemplateFile */
430	if (lpFileName == NULL) /* this indicates creation from template */
431	{
432	iIndex = _HMHandleQuery(hTemplateFile); /* query table for template */
433	if (-1 == iIndex) /* this device is unknown to us */
434	{
435	SetLastError (ERROR_INVALID_HANDLE);
436	return INVALID_HANDLE_VALUE;
437	}
438	else
439	{
440	/* to pass to handler */
441	pHMHandleData = &TabWin32Handles[iIndex].hmHandleData;
442	pDeviceHandler = TabWin32Handles[iIndex].pDeviceHandler;
443	}
444	}
445	else
446	{
447	pDeviceHandler = _HMDeviceFind((PSZ)lpFileName); /* find device */
448
449	if (NULL == pDeviceHandler) /* this name is unknown to us */
450	{
451	SetLastError(ERROR_FILE_NOT_FOUND);
452	return (INVALID_HANDLE_VALUE); /* signal error */
453	}
454	else
455	pHMHandleData = NULL;
456	}
457
458
459	iIndexNew = _HMHandleGetFree(); /* get free handle */
460	if (-1 == iIndexNew) /* oops, no free handles ! */
461	{
462	SetLastError(ERROR_NOT_ENOUGH_MEMORY); /* use this as error message */
463	return (INVALID_HANDLE_VALUE); /* signal error */
464	}
465
466
467	/* initialize the complete HMHANDLEDATA structure */
468	if (lpFileName == NULL) /* create from template */
469	memcpy (&TabWin32Handles[iIndexNew].hmHandleData,
470	&TabWin32Handles[iIndex].hmHandleData,
471	sizeof(HMHANDLEDATA));
472	else
473	{
474	HMHandleTemp.dwType = FILE_TYPE_UNKNOWN; /* unknown handle type */
475	HMHandleTemp.dwAccess = dwDesiredAccess;
476	HMHandleTemp.dwShare = dwShareMode;
477	HMHandleTemp.dwCreation = dwCreationDisposition;
478	HMHandleTemp.dwFlags = dwFlagsAndAttributes;
479	HMHandleTemp.lpHandlerData = NULL;
480	}
481
482	/* we've got to mark the handle as occupied here, since another device */
483	/* could be created within the device handler -> deadlock */
484
485	/* write appropriate entry into the handle table if open succeeded */
486	hResult = (ULONG)iIndexNew \| HM_HANDLE_ID;
487	HMHandleTemp.hHandle = hResult;
488	TabWin32Handles[iIndexNew].pDeviceHandler = pDeviceHandler;
489
490	/* now copy back our temporary handle data */
491	memcpy(&TabWin32Handles[iIndexNew].hmHandleData,
492	&HMHandleTemp,
493	sizeof(HMHANDLEDATA));
494
495	rc = pDeviceHandler->CreateFile(lpFileName, /* call the device handler */
496	&HMHandleTemp,
497	lpSecurityAttributes,
498	pHMHandleData);
499
500	#ifdef DEBUG_LOCAL
501	dprintf(("KERNEL32/HandleManager:CheckPoint2: %s lpHandlerData=%08xh\n",
502	lpFileName,
503	HMHandleTemp.lpHandlerData));
504	#endif
505
506	if (rc != NO_ERROR) /* oops, creation failed within the device handler */
507	{
508	TabWin32Handles[iIndexNew].hmHandleData.hHandle = INVALID_HANDLE_VALUE;
509	SetLastError(rc); /* Hehe, OS/2 and NT are pretty compatible :) */
510	return (INVALID_HANDLE_VALUE); /* signal error */
511	}
512	else
513	{
514	/* copy data fields that might have been modified by CreateFile */
515	memcpy(&TabWin32Handles[iIndexNew].hmHandleData,
516	&HMHandleTemp,
517	sizeof(HMHANDLEDATA));
518	}
519
520
521	#ifdef DEBUG_LOCAL
522	dprintf(("KERNEL32/HandleManager: CreateFile(%s)=%08xh\n",
523	lpFileName,
524	hResult));
525	#endif
526
527	return hResult; /* return valid handle */
528	}
529
530
531	/*****************************************************************************
532	* Name : HANDLE HMCloseFile
533	* Purpose : Wrapper for the CloseHandle() API
534	* Parameters:
535	* Variables :
536	* Result :
537	* Remark :
538	* Status :
539	*
540	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
541	*****************************************************************************/
542
543	BOOL HMCloseHandle(HANDLE hObject)
544	{
545	int iIndex; /* index into the handle table */
546	BOOL fResult; /* result from the device handler's CloseHandle() */
547	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
548
549	/* validate handle */
550	iIndex = _HMHandleQuery(hObject); /* get the index */
551	if (-1 == iIndex) /* error ? */
552	{
553	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
554	return (FALSE); /* signal failure */
555	}
556
557	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
558	fResult = pHMHandle->pDeviceHandler->CloseHandle(&pHMHandle->hmHandleData);
559
560	if (fResult == TRUE) /* remove handle if close succeeded */
561	pHMHandle->hmHandleData.hHandle = 0; /* mark handle as free */
562
563	return (fResult); /* deliver return code */
564	}
565
566
567	/*****************************************************************************
568	* Name : HANDLE HMReadFile
569	* Purpose : Wrapper for the ReadHandle() API
570	* Parameters:
571	* Variables :
572	* Result :
573	* Remark :
574	* Status :
575	*
576	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
577	*****************************************************************************/
578
579	BOOL HMReadFile(HANDLE hFile,
580	LPCVOID lpBuffer,
581	DWORD nNumberOfBytesToRead,
582	LPDWORD lpNumberOfBytesRead,
583	LPOVERLAPPED lpOverlapped)
584	{
585	int iIndex; /* index into the handle table */
586	BOOL fResult; /* result from the device handler's CloseHandle() */
587	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
588
589	/* validate handle */
590	iIndex = _HMHandleQuery(hFile); /* get the index */
591	if (-1 == iIndex) /* error ? */
592	{
593	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
594	return (FALSE); /* signal failure */
595	}
596
597	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
598	fResult = pHMHandle->pDeviceHandler->ReadFile(&pHMHandle->hmHandleData,
599	lpBuffer,
600	nNumberOfBytesToRead,
601	lpNumberOfBytesRead,
602	lpOverlapped);
603
604	return (fResult); /* deliver return code */
605	}
606
607
608	/*****************************************************************************
609	* Name : HANDLE HMWriteFile
610	* Purpose : Wrapper for the WriteHandle() API
611	* Parameters:
612	* Variables :
613	* Result :
614	* Remark :
615	* Status :
616	*
617	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
618	*****************************************************************************/
619
620	BOOL HMWriteFile(HANDLE hFile,
621	LPCVOID lpBuffer,
622	DWORD nNumberOfBytesToWrite,
623	LPDWORD lpNumberOfBytesWritten,
624	LPOVERLAPPED lpOverlapped)
625	{
626	int iIndex; /* index into the handle table */
627	BOOL fResult; /* result from the device handler's CloseHandle() */
628	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
629
630	/* validate handle */
631	iIndex = _HMHandleQuery(hFile); /* get the index */
632	if (-1 == iIndex) /* error ? */
633	{
634	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
635	return (FALSE); /* signal failure */
636	}
637
638	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
639	fResult = pHMHandle->pDeviceHandler->WriteFile(&pHMHandle->hmHandleData,
640	lpBuffer,
641	nNumberOfBytesToWrite,
642	lpNumberOfBytesWritten,
643	lpOverlapped);
644
645	return (fResult); /* deliver return code */
646	}
647
648
649	/*****************************************************************************
650	* Name : HANDLE HMGetFileType
651	* Purpose : Wrapper for the GetFileType() API
652	* Parameters:
653	* Variables :
654	* Result :
655	* Remark :
656	* Status :
657	*
658	* Author : Patrick Haller [Wed, 1998/02/12 13:37]
659	*****************************************************************************/
660
661	DWORD HMGetFileType(HANDLE hFile)
662	{
663	int iIndex; /* index into the handle table */
664	DWORD dwResult; /* result from the device handler's API */
665	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
666
667	/* validate handle */
668	iIndex = _HMHandleQuery(hFile); /* get the index */
669	if (-1 == iIndex) /* error ? */
670	{
671	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
672	return (FILE_TYPE_UNKNOWN); /* signal failure */
673	}
674
675	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
676	dwResult = pHMHandle->pDeviceHandler->GetFileType(&pHMHandle->hmHandleData);
677
678	return (dwResult); /* deliver return code */
679	}
680
681
682	/*****************************************************************************
683	* Name : HMDeviceHandler::_DeviceReuqest
684	* Purpose : entry method for special request functions
685	* Parameters: ULONG ulRequestCode
686	* various parameters as required
687	* Variables :
688	* Result :
689	* Remark : the standard behaviour is to return an error code for non-
690	* existant request codes
691	* Status :
692	*
693	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
694	*****************************************************************************/
695	DWORD HMDeviceRequest (HANDLE hFile,
696	ULONG ulRequestCode,
697	ULONG arg1,
698	ULONG arg2,
699	ULONG arg3,
700	ULONG arg4)
701	{
702	int iIndex; /* index into the handle table */
703	DWORD dwResult; /* result from the device handler's API */
704	PHMHANDLE pHMHandle; /* pointer to the handle structure in the table */
705
706	/* validate handle */
707	iIndex = _HMHandleQuery(hFile); /* get the index */
708	if (-1 == iIndex) /* error ? */
709	{
710	SetLastError(ERROR_INVALID_HANDLE); /* set win32 error information */
711	return (FILE_TYPE_UNKNOWN); /* signal failure */
712	}
713
714	pHMHandle = &TabWin32Handles[iIndex]; /* call device handler */
715	dwResult = pHMHandle->pDeviceHandler->_DeviceRequest(&pHMHandle->hmHandleData,
716	ulRequestCode,
717	arg1,
718	arg2,
719	arg3,
720	arg4);
721
722	return (dwResult); /* deliver return code */
723	}
724
725
726	/*****************************************************************************
727	* Name : HMDeviceHandler::HMDeviceHandler
728	* Purpose : default constructor for a device handler object
729	* Parameters: LPCSTR lpDeviceName
730	* Variables :
731	* Result :
732	* Remark : this is only to identify the device for debugging purposes
733	* Status :
734	*
735	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
736	*****************************************************************************/
737
738	HMDeviceHandler::HMDeviceHandler(LPCSTR lpDeviceName)
739	{
740	/* only a reference on the device name */
741	HMDeviceHandler::lpHMDeviceName = lpDeviceName;
742	}
743
744
745	/*****************************************************************************
746	* Name : HMDeviceHandler::_DeviceReuqest
747	* Purpose : entry method for special request functions
748	* Parameters: ULONG ulRequestCode
749	* various parameters as required
750	* Variables :
751	* Result :
752	* Remark : the standard behaviour is to return an error code for non-
753	* existant request codes
754	* Status :
755	*
756	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
757	*****************************************************************************/
758	DWORD HMDeviceHandler::_DeviceRequest (PHMHANDLEDATA pHMHandleData,
759	ULONG ulRequestCode,
760	ULONG arg1,
761	ULONG arg2,
762	ULONG arg3,
763	ULONG arg4)
764	{
765	dprintf(("KERNEL32:HandleManager::_DeviceRequest %s(%08x,%08x) - stub?\n",
766	lpHMDeviceName,
767	pHMHandleData,
768	ulRequestCode));
769
770	return(ERROR_INVALID_FUNCTION);
771	}
772
773
774	/*****************************************************************************
775	* Name : DWORD HMDeviceHandler::CreateFile
776	* Purpose : this is called from the handle manager if a CreateFile() is
777	* performed on a handle
778	* Parameters: LPCSTR lpFileName name of the file / device
779	* PHMHANDLEDATA pHMHandleData data of the NEW handle
780	* PVOID lpSecurityAttributes ignored
781	* PHMHANDLEDATA pHMHandleDataTemplate data of the template handle
782	* Variables :
783	* Result :
784	* Remark :
785	* Status : NO_ERROR - API succeeded
786	* other - what is to be set in SetLastError
787	*
788	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
789	*****************************************************************************/
790
791	DWORD HMDeviceHandler::CreateFile (LPCSTR lpFileName,
792	PHMHANDLEDATA pHMHandleData,
793	PVOID lpSecurityAttributes,
794	PHMHANDLEDATA pHMHandleDataTemplate)
795	{
796	dprintf(("KERNEL32:HandleManager::CreateFile %s(%s,%08x,%08x,%08x) - stub?\n",
797	lpHMDeviceName,
798	lpFileName,
799	pHMHandleData,
800	lpSecurityAttributes,
801	pHMHandleDataTemplate));
802
803	return(ERROR_INVALID_FUNCTION);
804	}
805
806
807	/*****************************************************************************
808	* Name : DWORD HMDeviceHandler::CloseHandle
809	* Purpose : close the handle
810	* Parameters: PHMHANDLEDATA pHMHandleData
811	* Variables :
812	* Result : API returncode
813	* Remark :
814	* Status :
815	*
816	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
817	*****************************************************************************/
818
819	DWORD HMDeviceHandler::CloseHandle(PHMHANDLEDATA pHMHandleData)
820	{
821	dprintf(("KERNEL32:HandleManager::CloseHandle %s(%08x) - stub?\n",
822	lpHMDeviceName,
823	pHMHandleData));
824
825	return(ERROR_INVALID_FUNCTION);
826	}
827
828
829	/*****************************************************************************
830	* Name : DWORD HMDeviceHandler::ReadFile
831	* Purpose : read data from handle / device
832	* Parameters: PHMHANDLEDATA pHMHandleData,
833	* LPCVOID lpBuffer,
834	* DWORD nNumberOfBytesToRead,
835	* LPDWORD lpNumberOfBytesRead,
836	* LPOVERLAPPED lpOverlapped
837	* Variables :
838	* Result : API returncode
839	* Remark :
840	* Status :
841	*
842	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
843	*****************************************************************************/
844
845	DWORD HMDeviceHandler::ReadFile(PHMHANDLEDATA pHMHandleData,
846	LPCVOID lpBuffer,
847	DWORD nNumberOfBytesToRead,
848	LPDWORD lpNumberOfBytesRead,
849	LPOVERLAPPED lpOverlapped)
850	{
851	dprintf(("KERNEL32:HandleManager::ReadFile %s(%08x,%08x,%08x,%08x,%08x) - stub?\n",
852	lpHMDeviceName,
853	pHMHandleData,
854	lpBuffer,
855	nNumberOfBytesToRead,
856	lpNumberOfBytesRead,
857	lpOverlapped));
858
859	return(ERROR_INVALID_FUNCTION);
860	}
861
862
863	/*****************************************************************************
864	* Name : DWORD HMDeviceHandler::WriteFile
865	* Purpose : write data to handle / device
866	* Parameters: PHMHANDLEDATA pHMHandleData,
867	* LPCVOID lpBuffer,
868	* DWORD nNumberOfBytesToWrite,
869	* LPDWORD lpNumberOfBytesWritten,
870	* LPOVERLAPPED lpOverlapped
871	* Variables :
872	* Result : API returncode
873	* Remark :
874	* Status :
875	*
876	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
877	*****************************************************************************/
878
879	DWORD HMDeviceHandler::WriteFile(PHMHANDLEDATA pHMHandleData,
880	LPCVOID lpBuffer,
881	DWORD nNumberOfBytesToWrite,
882	LPDWORD lpNumberOfBytesWritten,
883	LPOVERLAPPED lpOverlapped)
884	{
885	dprintf(("KERNEL32:HandleManager::WriteFile %s(%08x,%08x,%08x,%08x,%08x) - stub?\n",
886	lpHMDeviceName,
887	pHMHandleData,
888	lpBuffer,
889	nNumberOfBytesToWrite,
890	lpNumberOfBytesWritten,
891	lpOverlapped));
892
893	return(ERROR_INVALID_FUNCTION);
894	}
895
896
897	/*****************************************************************************
898	* Name : DWORD HMDeviceHandler::GetFileType
899	* Purpose : determine the handle type
900	* Parameters: PHMHANDLEDATA pHMHandleData
901	* Variables :
902	* Result : API returncode
903	* Remark :
904	* Status :
905	*
906	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
907	*****************************************************************************/
908
909	DWORD HMDeviceHandler::GetFileType(PHMHANDLEDATA pHMHandleData)
910	{
911	dprintf(("KERNEL32:HandleManager::GetFileType %s(%08x)\n",
912	lpHMDeviceName,
913	pHMHandleData));
914
915	return pHMHandleData->dwType;
916	}
917
918
919
920	/*****************************************************************************/
921	/* handle translation buffer management */
922	/* */
923	/* Since some Win32 applications rely (!) on 16-bit handles, we've got to do */
924	/* 32-bit to 16-bit and vs vsa translation here. */
925	/* Filehandle-based functions should be routed via the handlemanager instead */
926	/* of going to Open32 directly. */
927	/*****************************************************************************/
928
929
930	/*****************************************************************************
931	* Name : DWORD HMHandleAllocate
932	* Purpose : allocate a handle in the translation table
933	* Parameters: PULONG pHandle16 - to return the allocated handle
934	* ULONG hHandle32 - the associated OS/2 handle
935	* Variables :
936	* Result : API returncode
937	* Remark : no parameter checking is done, phHandle may not be invalid
938	* hHandle32 shouldn't be 0
939	* Status :
940	*
941	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
942	*****************************************************************************/
943
944	DWORD HMHandleAllocate (PULONG phHandle16,
945	ULONG hHandle32)
946	{
947	register ULONG ulHandle;
948
949	#ifdef DEBUG_LOCAL
950	dprintf(("KERNEL32::HMHandleAllocate (%08xh,%08xh)\n",
951	phHandle16,
952	hHandle32));
953	#endif
954
955	ulHandle = HMGlobals.ulHandleLast; /* get free handle */
956
957	do
958	{
959	/* check if handle is free */
960	if (HMGlobals.TabTranslationHandles[ulHandle].hHandle32 == 0)
961	{
962	*phHandle16 = ulHandle;
963	HMGlobals.TabTranslationHandles[ulHandle].hHandle32 = hHandle32;
964	HMGlobals.ulHandleLast = ulHandle; /* to shorten search times */
965
966	return (NO_ERROR); /* OK */
967	}
968
969	ulHandle++; /* skip to next entry */
970
971	if (ulHandle >= MAX_TRANSLATION_HANDLES) /* check boundary */
972	ulHandle = 0;
973	}
974	while (ulHandle != HMGlobals.ulHandleLast);
975
976	return (ERROR_TOO_MANY_OPEN_FILES); /* OK, we're done */
977	}
978
979
980	/*****************************************************************************
981	* Name : DWORD HMHandleFree
982	* Purpose : free a handle from the translation table
983	* Parameters: ULONG hHandle16 - the handle to be freed
984	* Variables :
985	* Result : API returncode
986	* Remark : no parameter checking is done, hHandle16 MAY NEVER exceed
987	* the MAX_TRANSLATION_HANDLES boundary
988	* Status :
989	*
990	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
991	*****************************************************************************/
992
993	DWORD HMHandleFree (ULONG hHandle16)
994	{
995	ULONG rc; /* API returncode */
996
997	#ifdef DEBUG_LOCAL
998	dprintf(("KERNEL32::HMHandleFree (%08xh)\n",
999	hHandle16));
1000	#endif
1001
1002	rc = HMHandleValidate(hHandle16); /* verify handle */
1003	if (rc != NO_ERROR) /* check errors */
1004	return (rc); /* raise error condition */
1005
1006	HMGlobals.TabTranslationHandles[hHandle16].hHandle32 = 0; /* OK, done */
1007
1008	return (NO_ERROR);
1009	}
1010
1011
1012	/*****************************************************************************
1013	* Name : DWORD HMHandleValidate
1014	* Purpose : validate a handle through the translation table
1015	* Parameters: ULONG hHandle16 - the handle to be verified
1016	* Variables :
1017	* Result : API returncode
1018	* Remark :
1019	* Status :
1020	*
1021	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
1022	*****************************************************************************/
1023
1024	DWORD HMHandleValidate (ULONG hHandle16)
1025	{
1026	#ifdef DEBUG_LOCAL
1027	dprintf(("KERNEL32::HMHandleValidate (%08xh)\n",
1028	hHandle16));
1029	#endif
1030
1031	if (hHandle16 >= MAX_TRANSLATION_HANDLES) /* check boundary */
1032	return (ERROR_INVALID_HANDLE); /* raise error condition */
1033
1034	if (HMGlobals.TabTranslationHandles[hHandle16].hHandle32 == 0) /* valid ? */
1035	return (ERROR_INVALID_HANDLE); /* raise error condition */
1036
1037	return (NO_ERROR);
1038	}
1039
1040
1041	/*****************************************************************************
1042	* Name : DWORD HMHandleTranslateToWin
1043	* Purpose : translate a 32-bit OS/2 handle to the associated windows handle
1044	* Parameters: ULONG hHandle32 - the OS/2 handle
1045	* PULONG phHandle16 - the associated windows handle
1046	* Variables :
1047	* Result : API returncode
1048	* Remark :
1049	* Status :
1050	*
1051	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
1052	*****************************************************************************/
1053
1054	DWORD HMHandleTranslateToWin (ULONG hHandle32,
1055	PULONG phHandle16)
1056	{
1057	ULONG rc; /* API returncode */
1058	register ULONG ulIndex; /* index counter over the table */
1059
1060	#ifdef DEBUG_LOCAL
1061	dprintf(("KERNEL32::HMHandleTranslateToWin (%08xh, %08xh)\n",
1062	hHandle32,
1063	phHandle16));
1064	#endif
1065
1066	for (ulIndex = 0;
1067	ulIndex < MAX_TRANSLATION_HANDLES;
1068	ulIndex++)
1069	{
1070	/* look for the handle */
1071	if (HMGlobals.TabTranslationHandles[ulIndex].hHandle32 == hHandle32)
1072	{
1073	phHandle16 = ulIndex; / deliver result */
1074	return (NO_ERROR); /* OK */
1075	}
1076	}
1077
1078	return (ERROR_INVALID_HANDLE); /* raise error condition */
1079	}
1080
1081
1082	/*****************************************************************************
1083	* Name : DWORD HMHandleTranslateToOS2
1084	* Purpose : translate a 16-bit Win32 handle to the associated OS/2 handle
1085	* Parameters: ULONG hHandle16 - the windows handle
1086	* PULONG phHandle32 - the associated OS/2 handle
1087	* Variables :
1088	* Result : API returncode
1089	* Remark :
1090	* Status :
1091	*
1092	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
1093	*****************************************************************************/
1094
1095	DWORD HMHandleTranslateToOS2 (ULONG hHandle16,
1096	PULONG phHandle32)
1097	{
1098	#ifdef DEBUG_LOCAL
1099	dprintf(("KERNEL32::HMHandleTranslateToOS2 (%08xh, %08xh)\n",
1100	hHandle16,
1101	phHandle32));
1102	#endif
1103
1104	if (HMHandleValidate(hHandle16) == NO_ERROR) /* verify handle */
1105	{
1106	*phHandle32 = HMGlobals.TabTranslationHandles[hHandle16].hHandle32;
1107	return (NO_ERROR);
1108	}
1109
1110	return (ERROR_INVALID_HANDLE); /* raise error condition */
1111	}
1112
1113
1114	/*****************************************************************************
1115	* Name : DWORD HMHandleTranslateToOS2i
1116	* Purpose : translate a 16-bit Win32 handle to the associated OS/2 handle
1117	* Parameters: ULONG hHandle16 - the windows handle
1118	* Variables :
1119	* Result : OS/2 handle
1120	* Remark : no checkinf
1121	* Status :
1122	*
1123	* Author : Patrick Haller [Wed, 1998/02/11 20:44]
1124	*****************************************************************************/
1125
1126	DWORD HMHandleTranslateToOS2i (ULONG hHandle16)
1127	{
1128	#ifdef DEBUG_LOCAL
1129	dprintf(("KERNEL32::HMHandleTranslateToOS2i (%08xh)\n",
1130	hHandle16));
1131	#endif
1132
1133	return(HMGlobals.TabTranslationHandles[hHandle16].hHandle32);
1134	}

Note: See TracBrowser for help on using the repository browser.

Download in other formats: