VBoxServiceClipboard-os2.cpp@ 10719

Last change on this file since 10719 was 8580, checked in by vboxsync, 17 years ago
AssertMsgBreakVoid -> AssertMsgBreak.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 37.3 KB

Line
1	/** $Id: VBoxServiceClipboard-os2.cpp 8580 2008-05-05 13:56:33Z vboxsync $ */
2	/** @file
3	* VBoxService - Guest Additions Clipboard Service, OS/2.
4	*/
5
6	/*
7	* Copyright (C) 2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define INCL_BASE
27	#define INCL_PM
28	#define INCL_ERRORS
29	#include <os2.h>
30
31	#include <iprt/thread.h>
32	#include <iprt/string.h>
33	#include <iprt/semaphore.h>
34	#include <iprt/time.h>
35	#include <iprt/mem.h>
36	#include <iprt/param.h>
37	#include <iprt/assert.h>
38	#include <iprt/asm.h>
39	#include <VBox/VBoxGuest.h>
40	#include <VBox/HostServices/VBoxClipboardSvc.h>
41	#include "VBoxServiceInternal.h"
42
43
44	/*******************************************************************************
45	* Structures and Typedefs *
46	*******************************************************************************/
47	/** Header for Odin32 specific clipboard entries.
48	* (Used to get the correct size of the data.)
49	*/
50	typedef struct _Odin32ClipboardHeader
51	{
52	/** magic number */
53	char achMagic[8];
54	/** Size of the following data.
55	* (The interpretation depends on the type.) */
56	unsigned cbData;
57	/** Odin32 format number. */
58	unsigned uFormat;
59	} CLIPHEADER, *PCLIPHEADER;
60
61	#define CLIPHEADER_MAGIC "Odin\1\0\1"
62
63
64	/*******************************************************************************
65	* Global Variables *
66	*******************************************************************************/
67
68	/** The control thread (main) handle.
69	* Only used to avoid some queue creation trouble. */
70	static RTTHREAD g_ThreadCtrl = NIL_RTTHREAD;
71	/** The HAB of the control thread (main). */
72	static HAB g_habCtrl = NULLHANDLE;
73	/** The HMQ of the control thread (main). */
74	static HMQ g_hmqCtrl = NULLHANDLE;
75
76	/** The Listener thread handle. */
77	static RTTHREAD g_ThreadListener = NIL_RTTHREAD;
78	/** The HAB of the listener thread. */
79	static HAB g_habListener = NULLHANDLE;
80	/** The HMQ of the listener thread. */
81	static HMQ g_hmqListener = NULLHANDLE;
82	/** Indicator that gets set if the listener thread is successfully initialized. */
83	static bool volatile g_fListenerOkay = false;
84
85	/** The HAB of the worker thread. */
86	static HAB g_habWorker = NULLHANDLE;
87	/** The HMQ of the worker thread. */
88	static HMQ g_hmqWorker = NULLHANDLE;
89	/** The object window handle. */
90	static HWND g_hwndWorker = NULLHANDLE;
91	/** The timer id returned by WinStartTimer. */
92	static ULONG g_idWorkerTimer = ~0UL;
93	/** The state of the clipboard.
94	* @remark I'm trying out the 'k' prefix from the mac here, bear with me. */
95	static enum
96	{
97	/** The clipboard hasn't been initialized yet. */
98	kClipboardState_Uninitialized = 0,
99	/** WinSetClipbrdViewer call in progress, ignore WM_DRAWCLIPBOARD. */
100	kClipboardState_SettingViewer,
101	/** We're monitoring the clipboard as a viewer. */
102	kClipboardState_Viewer,
103	/** We're monitoring the clipboard using polling.
104	* This usually means something is wrong... */
105	kClipboardState_Polling,
106	/** We're destroying the clipboard content, ignore WM_DESTROYCLIPBOARD. */
107	kClipboardState_Destroying,
108	/** We're owning the clipboard (i.e. we have data on it). */
109	kClipboardState_Owner
110	} g_enmState = kClipboardState_Uninitialized;
111	/** Set if the clipboard was empty the last time we polled it. */
112	static bool g_fEmptyClipboard = false;
113
114	/** A clipboard format atom for the dummy clipboard data we insert
115	* watching for clipboard changes. If this format is found on the
116	* clipboard, the empty clipboard function has not been called
117	* since we last polled it. */
118	static ATOM g_atomNothingChanged = 0;
119
120	/** The clipboard connection client ID. */
121	static uint32_t g_u32ClientId;
122	/** Odin32 CF_UNICODETEXT. See user32.cpp. */
123	static ATOM g_atomOdin32UnicodeText = 0;
124	/** Odin32 CF_UNICODETEXT. See user32.cpp. */
125	#define SZFMT_ODIN32_UNICODETEXT (PCSZ)"Odin32 UnicodeText"
126
127
128
129
130	/** @copydoc VBOXSERVICE::pfnPreInit */
131	static DECLCALLBACK(int) VBoxServiceClipboardOS2PreInit(void)
132	{
133	return VINF_SUCCESS;
134	}
135
136
137	/** @copydoc VBOXSERVICE::pfnOption */
138	static DECLCALLBACK(int) VBoxServiceClipboardOS2Option(const char ppszShort, int argc, char argv, int *pi)
139	{
140	return -1;
141	}
142
143
144	/** @copydoc VBOXSERVICE::pfnInit */
145	static DECLCALLBACK(int) VBoxServiceClipboardOS2Init(void)
146	{
147	int rc = VERR_GENERAL_FAILURE;
148	g_ThreadCtrl = RTThreadSelf();
149
150	/*
151	* Make PM happy.
152	*/
153	PPIB pPib;
154	PTIB pTib;
155	DosGetInfoBlocks(&pTib, &pPib);
156	pPib->pib_ultype = 3; /* PM session type */
157
158	/*
159	* Since we have to send shutdown messages and such from the
160	* service controller (main) thread, create a HAB and HMQ for it.
161	*/
162	g_habCtrl = WinInitialize(0);
163	if (g_habCtrl == NULLHANDLE)
164	{
165	VBoxServiceError("WinInitialize(0) failed, lasterr=%lx\n", WinGetLastError(NULLHANDLE));
166	return VERR_GENERAL_FAILURE;
167	}
168	g_hmqCtrl = WinCreateMsgQueue(g_habCtrl, 0);
169	if (g_hmqCtrl != NULLHANDLE)
170	{
171	/*
172	* Create the 'nothing-changed' format.
173	*/
174	g_atomNothingChanged = WinAddAtom(WinQuerySystemAtomTable(), (PCSZ)"VirtualBox Clipboard Service");
175	LONG lLastError = WinGetLastError(g_habCtrl);
176	if (g_atomNothingChanged == 0)
177	g_atomNothingChanged = WinFindAtom(WinQuerySystemAtomTable(), (PCSZ)"VirtualBox Clipboard Service");
178	if (g_atomNothingChanged)
179	{
180	/*
181	* Connect to the clipboard service.
182	*/
183	VBoxServiceVerbose(4, "clipboard: connecting\n");
184	rc = VbglR3ClipboardConnect(&g_u32ClientId);
185	if (RT_SUCCESS(rc))
186	{
187	/*
188	* Create any extra clipboard type atoms, like the odin unicode text.
189	*/
190	g_atomOdin32UnicodeText = WinAddAtom(WinQuerySystemAtomTable(), SZFMT_ODIN32_UNICODETEXT);
191	lLastError = WinGetLastError(g_habCtrl);
192	if (g_atomOdin32UnicodeText == 0)
193	g_atomOdin32UnicodeText = WinFindAtom(WinQuerySystemAtomTable(), SZFMT_ODIN32_UNICODETEXT);
194	if (g_atomOdin32UnicodeText == 0)
195	VBoxServiceError("WinAddAtom() failed, lasterr=%lx; WinFindAtom() failed, lasterror=%lx\n",
196	lLastError, WinGetLastError(g_habCtrl));
197
198	VBoxServiceVerbose(2, "g_u32ClientId=%RX32 g_atomNothingChanged=%#x g_atomOdin32UnicodeText=%#x\n",
199	g_u32ClientId, g_atomNothingChanged, g_atomOdin32UnicodeText);
200	return VINF_SUCCESS;
201	}
202
203	VBoxServiceError("Failed to connect to the clipboard service, rc=%Rrc!\n", rc);
204	}
205	else
206	VBoxServiceError("WinAddAtom() failed, lasterr=%lx; WinFindAtom() failed, lasterror=%lx\n",
207	lLastError, WinGetLastError(g_habCtrl));
208	}
209	else
210	VBoxServiceError("WinCreateMsgQueue(,0) failed, lasterr=%lx\n", WinGetLastError(g_habCtrl));
211	WinTerminate(g_habCtrl);
212	return rc;
213	}
214
215
216	/**
217	* Check that we're still the view / try make us the viewer.
218	*/
219	static void VBoxServiceClipboardOS2PollViewer(void)
220	{
221	const int iOrgState = g_enmState;
222
223	HWND hwndClipboardViewer = WinQueryClipbrdViewer(g_habWorker);
224	if (hwndClipboardViewer == g_hwndWorker)
225	return;
226
227	if (hwndClipboardViewer == NULLHANDLE)
228	{
229	/* The API will send a WM_DRAWCLIPBOARD message before returning. */
230	g_enmState = kClipboardState_SettingViewer;
231	if (WinSetClipbrdViewer(g_habWorker, g_hwndWorker))
232	g_enmState = kClipboardState_Viewer;
233	else
234	g_enmState = kClipboardState_Polling;
235	}
236	else
237	g_enmState = kClipboardState_Polling;
238	if ((int)g_enmState != iOrgState)
239	{
240	if (g_enmState == kClipboardState_Viewer)
241	VBoxServiceVerbose(3, "clipboard: viewer\n");
242	else
243	VBoxServiceVerbose(3, "clipboard: poller\n");
244	}
245	}
246
247
248	/**
249	* Advertise the formats available from the host.
250	*/
251	static void VBoxServiceClipboardOS2AdvertiseHostFormats(uint32_t fFormats)
252	{
253	/*
254	* Open the clipboard and switch to 'destruction' mode.
255	* Make sure we stop being viewer. Temporarily also make sure we're
256	* not the owner so that PM won't send us any WM_DESTROYCLIPBOARD message.
257	*/
258	if (WinOpenClipbrd(g_habWorker))
259	{
260	if (g_enmState == kClipboardState_Viewer)
261	WinSetClipbrdViewer(g_habWorker, NULLHANDLE);
262	if (g_enmState == kClipboardState_Owner)
263	WinSetClipbrdOwner(g_habWorker, NULLHANDLE);
264
265	g_enmState = kClipboardState_Destroying;
266	if (WinEmptyClipbrd(g_habWorker))
267	{
268	/*
269	* Take clipboard ownership.
270	*/
271	if (WinSetClipbrdOwner(g_habWorker, g_hwndWorker))
272	{
273	g_enmState = kClipboardState_Owner;
274
275	/*
276	* Do the format advertising.
277	*/
278	if (fFormats & (VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT/* \| VBOX_SHARED_CLIPBOARD_FMT_HTML ?? */))
279	{
280	if (!WinSetClipbrdData(g_habWorker, 0, CF_TEXT, CFI_POINTER))
281	VBoxServiceError("WinSetClipbrdData(,,CF_TEXT,) failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
282	if ( g_atomOdin32UnicodeText
283	&& !WinSetClipbrdData(g_habWorker, 0, g_atomOdin32UnicodeText, CFI_POINTER))
284	VBoxServiceError("WinSetClipbrdData(,,g_atomOdin32UnicodeText,) failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
285	}
286	if (fFormats & VBOX_SHARED_CLIPBOARD_FMT_BITMAP)
287	{
288	/** @todo bitmaps */
289	}
290	}
291	else
292	{
293	VBoxServiceError("WinSetClipbrdOwner failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
294	g_enmState = kClipboardState_Polling;
295	}
296	}
297	else
298	{
299	VBoxServiceError("WinEmptyClipbrd failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
300	g_enmState = kClipboardState_Polling;
301	}
302
303	if (g_enmState == kClipboardState_Polling)
304	{
305	g_fEmptyClipboard = true;
306	VBoxServiceClipboardOS2PollViewer();
307	}
308
309	WinCloseClipbrd(g_habWorker);
310	}
311	else
312	VBoxServiceError("VBoxServiceClipboardOS2AdvertiseHostFormats: WinOpenClipbrd failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
313	}
314
315
316	static void VBoxServiceClipboardOs2ConvertToOdin32(uint32_t fFormat, USHORT usFmt, void pv, uint32_t cb)
317	{
318	PVOID pvPM = NULL;
319	APIRET rc = DosAllocSharedMem(&pvPM, NULL, cb + sizeof(CLIPHEADER), OBJ_GIVEABLE \| OBJ_GETTABLE \| OBJ_TILE \| PAG_READ \| PAG_WRITE \| PAG_COMMIT);
320	if (rc)
321	{
322	PCLIPHEADER pHdr = (PCLIPHEADER)pvPM;
323	memcpy(pHdr->achMagic, CLIPHEADER_MAGIC, sizeof(pHdr->achMagic));
324	pHdr->cbData = cb;
325	if (usFmt == g_atomOdin32UnicodeText)
326	pHdr->uFormat = usFmt;
327	else
328	AssertFailed();
329	memcpy(pHdr + 1, pv, cb);
330	}
331	else
332	{
333	VBoxServiceError("DosAllocSharedMem(,,%#x,,) -> %ld\n", cb + sizeof(CLIPHEADER), rc);
334	pvPM = NULL;
335	}
336	return pvPM;
337	}
338
339
340	static void VBoxServiceClipboardOs2ConvertToPM(uint32_t fFormat, USHORT usFmt, void pv, uint32_t cb)
341	{
342	void *pvPM = NULL;
343
344	/*
345	* The Odin32 stuff is simple, we just assume windows data from the host
346	* and all we need to do is add the header.
347	*/
348	if ( usFmt
349	&& ( usFmt == g_atomOdin32UnicodeText
350	/* \|\| usFmt == ...*/
351	)
352	)
353	pvPM = VBoxServiceClipboardOs2ConvertToOdin32(fFormat, usFmt, pv, cb);
354	else if (usFmt == CF_TEXT)
355	{
356	/*
357	* Convert the unicode text to the current ctype locale.
358	*
359	* Note that we probably should be using the current PM or DOS codepage
360	* here instead of the LC_CTYPE one which iconv uses by default.
361	* -lazybird
362	*/
363	Assert(fFormat & VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT);
364	char *pszUtf8;
365	int rc = RTUtf16ToUtf8((PCRTUTF16)pv, &pszUtf8);
366	if (RT_SUCCESS(rc))
367	{
368	char *pszLocale;
369	rc = RTStrUtf8ToCurrentCP(&pszLocale, pszUtf8);
370	if (RT_SUCCESS(rc))
371	{
372	size_t cbPM = strlen(pszLocale) + 1;
373	APIRET rc = DosAllocSharedMem(&pvPM, NULL, cbPM, OBJ_GIVEABLE \| OBJ_GETTABLE \| OBJ_TILE \| PAG_READ \| PAG_WRITE \| PAG_COMMIT);
374	if (rc == NO_ERROR)
375	memcpy(pvPM, pszLocale, cbPM);
376	else
377	{
378	VBoxServiceError("DosAllocSharedMem(,,%#x,,) -> %ld\n", cb + sizeof(CLIPHEADER), rc);
379	pvPM = NULL;
380	}
381	RTStrFree(pszLocale);
382	}
383	else
384	VBoxServiceError("RTStrUtf8ToCurrentCP() -> %Rrc\n", rc);
385	RTStrFree(pszUtf8);
386	}
387	else
388	VBoxServiceError("RTUtf16ToUtf8() -> %Rrc\n", rc);
389	}
390
391	return pvPM;
392	}
393
394
395	/**
396	* Tries to deliver an advertised host format.
397	*
398	* @param usFmt The PM format name.
399	*
400	* @remark We must not try open the clipboard here because WM_RENDERFMT is a
401	* request send synchronously by someone who has already opened the
402	* clipboard. We would enter a deadlock trying to open it here.
403	*
404	*/
405	static void VBoxServiceClipboardOS2RenderFormat(USHORT usFmt)
406	{
407	bool fSucceeded = false;
408
409	/*
410	* Determin which format.
411	*/
412	uint32_t fFormat;
413	if ( usFmt == CF_TEXT
414	\|\| usFmt == g_atomOdin32UnicodeText)
415	fFormat = VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT;
416	else /** @todo bitmaps */
417	fFormat = 0;
418	if (fFormat)
419	{
420	/*
421	* Query the data from the host.
422	* This might require two iterations because of buffer guessing.
423	*/
424	uint32_t cb = _4K;
425	int rc = VERR_NO_MEMORY;
426	void *pv = RTMemPageAllocZ(cb);
427	if (pv)
428	{
429	VBoxServiceVerbose(4, "clipboard: reading host data (%#x)\n", fFormat);
430	rc = VbglR3ClipboardReadData(g_u32ClientId, fFormat, pv, cb, &cb);
431	if (rc == VINF_BUFFER_OVERFLOW)
432	{
433	RTMemPageFree(pv);
434	cb = RT_ALIGN_32(cb, PAGE_SIZE);
435	pv = RTMemPageAllocZ(cb);
436	rc = VbglR3ClipboardReadData(g_u32ClientId, fFormat, pv, cb, &cb);
437	}
438	if (RT_FAILURE(rc))
439	RTMemPageFree(pv);
440	}
441	if (RT_SUCCESS(rc))
442	{
443	VBoxServiceVerbose(4, "clipboard: read %u bytes\n", cb);
444
445	/*
446	* Convert the host clipboard data to PM clipboard data and set it.
447	*/
448	PVOID pvPM = VBoxServiceClipboardOs2ConvertToPM(fFormat, usFmt, pv, cb);
449	if (pvPM)
450	{
451	if (WinSetClipbrdData(g_habWorker, (ULONG)pvPM, usFmt, CFI_POINTER))
452	fSucceeded = true;
453	else
454	{
455	VBoxServiceError("VBoxServiceClipboardOS2RenderFormat: WinSetClipbrdData(,%p,%#x, CF_POINTER) failed, lasterror=%lx\n",
456	pvPM, usFmt, WinGetLastError(g_habWorker));
457	DosFreeMem(pvPM);
458	}
459	}
460	RTMemPageFree(pv);
461	}
462	else
463	VBoxServiceError("VBoxServiceClipboardOS2RenderFormat: Failed to query / allocate data. rc=%Rrc cb=%#RX32\n", rc, cb);
464	}
465
466	/*
467	* Empty the clipboard on failure so we don't end up in any loops.
468	*/
469	if (!fSucceeded)
470	{
471	WinSetClipbrdOwner(g_habWorker, NULLHANDLE);
472	g_enmState = kClipboardState_Destroying;
473	WinEmptyClipbrd(g_habWorker);
474	g_enmState = kClipboardState_Polling;
475	g_fEmptyClipboard = true;
476	VBoxServiceClipboardOS2PollViewer();
477	}
478	}
479
480
481	static void VBoxServiceClipboardOS2SendDataToHost(uint32_t fFormat)
482	{
483	if (WinOpenClipbrd(g_habWorker))
484	{
485	PRTUTF16 pwszFree = NULL;
486	void *pv = NULL;
487	uint32_t cb = 0;
488
489	if (fFormat & VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
490	{
491	/* Got any odin32 unicode text? */
492	PVOID pvPM;
493	PCLIPHEADER pHdr = (PCLIPHEADER)WinQueryClipbrdData(g_habWorker, g_atomOdin32UnicodeText);
494	if ( pHdr
495	&& !memcmp(pHdr->achMagic, CLIPHEADER_MAGIC, sizeof(pHdr->achMagic)))
496	{
497	pv = pHdr + 1;
498	cb = pHdr->cbData;
499	}
500
501	/* Got any CF_TEXT? */
502	if ( !pv
503	&& (pvPM = (PVOID)WinQueryClipbrdData(g_habWorker, CF_TEXT)) != NULL)
504	{
505	char *pszUtf8;
506	int rc = RTStrCurrentCPToUtf8(&pszUtf8, (const char *)pvPM);
507	if (RT_SUCCESS(rc))
508	{
509	PRTUTF16 pwsz;
510	rc = RTStrToUtf16(pszUtf8, &pwsz);
511	if (RT_SUCCESS(rc))
512	{
513	pv = pwszFree = pwsz;
514	cb = (RTUtf16Len(pwsz) + 1) * sizeof(RTUTF16);
515	}
516	RTStrFree(pszUtf8);
517	}
518	}
519	}
520	if (!pv)
521	VBoxServiceError("VBoxServiceClipboardOS2SendDataToHost: couldn't find data for %#x\n", fFormat);
522
523	/*
524	* Now, sent whatever we've got to the host (it's waiting).
525	*/
526	VBoxServiceVerbose(4, "clipboard: writing %pv/%#d (fFormat=%#x)\n", pv, cb, fFormat);
527	VbglR3ClipboardWriteData(g_u32ClientId, fFormat, pv, cb);
528	RTUtf16Free(pwszFree);
529
530	WinCloseClipbrd(g_habWorker);
531	}
532	else
533	{
534	VBoxServiceError("VBoxServiceClipboardOS2SendDataToHost: WinOpenClipbrd failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
535	VBoxServiceVerbose(4, "clipboard: writing NULL/0 (fFormat=%x)\n", fFormat);
536	VbglR3ClipboardWriteData(g_u32ClientId, fFormat, NULL, 0);
537	}
538	}
539
540
541	/**
542	* Figure out what's on the clipboard and report it to the host.
543	*/
544	static void VBoxServiceClipboardOS2ReportFormats(void)
545	{
546	uint32_t fFormats = 0;
547	ULONG ulFormat = 0;
548	while ((ulFormat = WinEnumClipbrdFmts(g_habWorker, ulFormat)) != 0)
549	{
550	if ( ulFormat == CF_TEXT
551	\|\| ulFormat == g_atomOdin32UnicodeText)
552	fFormats \|= VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT;
553	/** @todo else bitmaps and stuff. */
554	}
555	VBoxServiceVerbose(4, "clipboard: reporting fFormats=%#x\n", fFormats);
556	VbglR3ClipboardReportFormats(g_u32ClientId, fFormats);
557	}
558
559
560	/**
561	* Poll the clipboard for changes.
562	*
563	* This is called both when we're the viewer and when we're
564	* falling back to polling. If something has changed it will
565	* notify the host.
566	*/
567	static void VBoxServiceClipboardOS2Poll(void)
568	{
569	if (WinOpenClipbrd(g_habWorker))
570	{
571	/*
572	* If our dummy is no longer there, something has actually changed,
573	* unless the clipboard is really empty.
574	*/
575	ULONG fFmtInfo;
576	if (!WinQueryClipbrdFmtInfo(g_habWorker, g_atomNothingChanged, &fFmtInfo))
577	{
578	if (WinEnumClipbrdFmts(g_habWorker, 0) != 0)
579	{
580	g_fEmptyClipboard = false;
581	VBoxServiceClipboardOS2ReportFormats();
582
583	/* inject the dummy */
584	PVOID pv;
585	APIRET rc = DosAllocSharedMem(&pv, NULL, 1, OBJ_GIVEABLE \| OBJ_GETTABLE \| PAG_READ \| PAG_WRITE \| PAG_COMMIT);
586	if (rc == NO_ERROR)
587	{
588	if (WinSetClipbrdData(g_habWorker, (ULONG)pv, g_atomNothingChanged, CFI_POINTER))
589	VBoxServiceVerbose(4, "clipboard: Added dummy item.\n");
590	else
591	{
592	VBoxServiceError("VBoxServiceClipboardOS2Poll: WinSetClipbrdData failed, lasterr=%#lx\n", WinGetLastError(g_habWorker));
593	DosFreeMem(pv);
594	}
595	}
596	else
597	VBoxServiceError("VBoxServiceClipboardOS2Poll: DosAllocSharedMem(,,1,) -> %ld\n", rc);
598	}
599	else if (!g_fEmptyClipboard)
600	{
601	g_fEmptyClipboard = true;
602	VBoxServiceVerbose(3, "Reporting empty clipboard\n");
603	VbglR3ClipboardReportFormats(g_u32ClientId, 0);
604	}
605	}
606	WinCloseClipbrd(g_habWorker);
607	}
608	else
609	VBoxServiceError("VBoxServiceClipboardOS2Poll: WinOpenClipbrd failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
610	}
611
612
613	/**
614	* The clipboard we owned was destroyed by someone else.
615	*/
616	static void VBoxServiceClipboardOS2Destroyed(void)
617	{
618	/* make sure we're no longer the owner. */
619	if (WinQueryClipbrdOwner(g_habWorker) == g_hwndWorker)
620	WinSetClipbrdOwner(g_habWorker, NULLHANDLE);
621
622	/* switch to polling state and notify the host. */
623	g_enmState = kClipboardState_Polling;
624	g_fEmptyClipboard = true;
625	VBoxServiceVerbose(3, "Reporting empty clipboard\n");
626	VbglR3ClipboardReportFormats(g_u32ClientId, 0);
627
628	VBoxServiceClipboardOS2PollViewer();
629	}
630
631
632	/**
633	* The window procedure for the object window.
634	*
635	* @returns Message result.
636	*
637	* @param hwnd The window handle.
638	* @param msg The message.
639	* @param mp1 Message parameter 1.
640	* @param mp2 Message parameter 2.
641	*/
642	static MRESULT EXPENTRY VBoxServiceClipboardOS2WinProc(HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
643	{
644	if (msg != WM_TIMER)
645	VBoxServiceVerbose(6, "VBoxServiceClipboardOS2WinProc: hwnd=%#lx msg=%#lx mp1=%#lx mp2=%#lx\n", hwnd, msg, mp1, mp2);
646
647	switch (msg)
648	{
649	/*
650	* Handle the two system defined messages for object windows.
651	*
652	* We'll just use the CREATE/DESTROY message to create that timer we're
653	* using for the viewer checks and polling fallback.
654	*/
655	case WM_CREATE:
656	g_idWorkerTimer = WinStartTimer(g_habWorker, hwnd, 1 /* id /, 1000 / 1 second */);
657	g_fEmptyClipboard = true;
658	g_enmState = kClipboardState_Polling;
659	return NULL; /* FALSE(/NULL) == Continue*/
660
661	case WM_DESTROY:
662	WinStopTimer(g_habWorker, hwnd, g_idWorkerTimer);
663	g_idWorkerTimer = ~0UL;
664	g_hwndWorker = NULLHANDLE;
665	break;
666
667	/*
668	* Clipboard viewer message - the content has been changed.
669	* This is sent after releasing the clipboard sem
670	* and during the WinSetClipbrdViewer call.
671	*/
672	case WM_DRAWCLIPBOARD:
673	if (g_enmState == kClipboardState_SettingViewer)
674	break;
675	AssertMsgBreak(g_enmState == kClipboardState_Viewer, ("g_enmState=%d\n", g_enmState));
676	VBoxServiceClipboardOS2Poll();
677	break;
678
679	/*
680	* Clipboard owner message - the content was replaced.
681	* This is sent by someone with an open clipboard, so don't try open it now.
682	*/
683	case WM_DESTROYCLIPBOARD:
684	if (g_enmState == kClipboardState_Destroying)
685	break; /* it's us doing the replacing, ignore. */
686	AssertMsgBreak(g_enmState == kClipboardState_Owner, ("g_enmState=%d\n", g_enmState));
687	VBoxServiceClipboardOS2Destroyed();
688	break;
689
690	/*
691	* Clipboard owner message - somebody is requesting us to render a format.
692	* This is called by someone which owns the clipboard, but that's fine.
693	*/
694	case WM_RENDERFMT:
695	AssertMsgBreak(g_enmState == kClipboardState_Owner, ("g_enmState=%d\n", g_enmState));
696	VBoxServiceClipboardOS2RenderFormat(SHORT1FROMMP(mp1));
697	break;
698
699	/*
700	* Clipboard owner message - we're about to quit and should render all formats.
701	*
702	* However, because we're lazy, we'll just ASSUME that since we're quitting
703	* we're probably about to shutdown or something and there is no point in
704	* doing anything here except for emptying the clipboard and removing
705	* ourselves as owner. Any failures at this point are silently ignored.
706	*/
707	case WM_RENDERALLFMTS:
708	WinOpenClipbrd(g_habWorker);
709	WinSetClipbrdOwner(g_habWorker, NULLHANDLE);
710	g_enmState = kClipboardState_Destroying;
711	WinEmptyClipbrd(g_habWorker);
712	g_enmState = kClipboardState_Polling;
713	g_fEmptyClipboard = true;
714	WinCloseClipbrd(g_habWorker);
715	break;
716
717	/*
718	* Listener message - the host has new formats to offer.
719	*/
720	case WM_USER + VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS:
721	VBoxServiceClipboardOS2AdvertiseHostFormats(LONGFROMMP(mp1));
722	break;
723
724	/*
725	* Listener message - the host wish to read our clipboard data.
726	*/
727	case WM_USER + VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA:
728	VBoxServiceClipboardOS2SendDataToHost(LONGFROMMP(mp1));
729	break;
730
731	/*
732	* This is just a fallback polling strategy in case some other
733	* app is trying to view the clipboard too. We also use this
734	* to try recover from errors.
735	*
736	* Because the way the clipboard service works, we have to monitor
737	* it all the time and cannot get away with simpler solutions like
738	* synergy is employing (basically checking upon entering and leaving
739	* a desktop).
740	*/
741	case WM_TIMER:
742	if ( g_enmState != kClipboardState_Viewer
743	&& g_enmState != kClipboardState_Polling)
744	break;
745
746	/* Lost the position as clipboard viwer?*/
747	if (g_enmState == kClipboardState_Viewer)
748	{
749	if (WinQueryClipbrdViewer(g_habWorker) == hwnd)
750	break;
751	g_enmState = kClipboardState_Polling;
752	}
753
754	/* poll for changes */
755	VBoxServiceClipboardOS2Poll();
756	VBoxServiceClipboardOS2PollViewer();
757	break;
758
759
760	/*
761	* Clipboard owner messages dealing with owner drawn content.
762	* We shouldn't be seeing any of these.
763	*/
764	case WM_PAINTCLIPBOARD:
765	case WM_SIZECLIPBOARD:
766	case WM_HSCROLLCLIPBOARD:
767	case WM_VSCROLLCLIPBOARD:
768	AssertMsgFailed(("msg=%lx (%ld)\n", msg, msg));
769	break;
770
771	/*
772	* We shouldn't be seeing any other messages according to the docs.
773	* But for whatever reason, PM sends us a WM_ADJUSTWINDOWPOS message
774	* during WinCreateWindow. So, ignore that and assert on anything else.
775	*/
776	default:
777	AssertMsgFailed(("msg=%lx (%ld)\n", msg, msg));
778	case WM_ADJUSTWINDOWPOS:
779	break;
780	}
781	return NULL;
782	}
783
784
785	/**
786	* The listener thread.
787	*
788	* This thread is dedicated to listening for host messages and forwarding
789	* these to the worker thread (using PM).
790	*
791	* The thread will set g_fListenerOkay and signal its user event when it has
792	* completed initialization. In the case of init failure g_fListenerOkay will
793	* not be set.
794	*
795	* @returns Init error code or VINF_SUCCESS.
796	* @param ThreadSelf Our thread handle.
797	* @param pvUser Pointer to the clipboard service shutdown indicator.
798	*/
799	static DECLCALLBACK(int) VBoxServiceClipboardOS2Listener(RTTHREAD ThreadSelf, void *pvUser)
800	{
801	bool volatile pfShutdown = (bool volatile )pvUser;
802	int rc = VERR_GENERAL_FAILURE;
803	VBoxServiceVerbose(3, "VBoxServiceClipboardOS2Listener: ThreadSelf=%RTthrd\n", ThreadSelf);
804
805	g_habListener = WinInitialize(0);
806	if (g_habListener != NULLHANDLE)
807	{
808	g_hmqListener = WinCreateMsgQueue(g_habListener, 0);
809	if (g_hmqListener != NULLHANDLE)
810	{
811	/*
812	* Tell the worker thread that we're good.
813	*/
814	rc = VINF_SUCCESS;
815	ASMAtomicXchgBool(&g_fListenerOkay, true);
816	RTThreadUserSignal(ThreadSelf);
817	VBoxServiceVerbose(3, "VBoxServiceClipboardOS2Listener: Started successfully\n");
818
819	/*
820	* Loop until termination is requested.
821	*/
822	bool fQuit = false;
823	while (!*pfShutdown && !fQuit)
824	{
825	uint32_t Msg;
826	uint32_t fFormats;
827	rc = VbglR3ClipboardGetHostMsg(g_u32ClientId, &Msg, &fFormats);
828	if (RT_SUCCESS(rc))
829	{
830	VBoxServiceVerbose(3, "VBoxServiceClipboardOS2Listener: Msg=%#x fFormats=%#x\n", Msg, fFormats);
831	switch (Msg)
832	{
833	/*
834	* The host has announced available clipboard formats.
835	* Forward the information to the window, so it can later
836	* respond do WM_RENDERFORMAT message.
837	*/
838	case VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS:
839	if (!WinPostMsg(g_hwndWorker, WM_USER + VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS,
840	MPFROMLONG(fFormats), 0))
841	VBoxServiceError("WinPostMsg(%lx, FORMATS,,) failed, lasterr=%#lx\n",
842	g_hwndWorker, WinGetLastError(g_habListener));
843	break;
844
845	/*
846	* The host needs data in the specified format.
847	*/
848	case VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA:
849	if (!WinPostMsg(g_hwndWorker, WM_USER + VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA,
850	MPFROMLONG(fFormats), 0))
851	VBoxServiceError("WinPostMsg(%lx, READ_DATA,,) failed, lasterr=%#lx\n",
852	g_hwndWorker, WinGetLastError(g_habListener));
853	break;
854
855	/*
856	* The host is terminating.
857	*/
858	case VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT:
859	fQuit = true;
860	break;
861
862	default:
863	VBoxServiceVerbose(1, "VBoxServiceClipboardOS2Listener: Unknown message %RU32\n", Msg);
864	break;
865	}
866	}
867	else
868	{
869	if (*pfShutdown)
870	break;
871	VBoxServiceError("VbglR3ClipboardGetHostMsg failed, rc=%Rrc\n", rc);
872	RTThreadSleep(1000);
873	}
874	} /* the loop */
875
876	WinDestroyMsgQueue(g_hmqListener);
877	}
878	WinTerminate(g_habListener);
879	g_habListener = NULLHANDLE;
880	}
881
882	/* Signal our semaphore to make the worker catch on. */
883	RTThreadUserSignal(ThreadSelf);
884	VBoxServiceVerbose(3, "VBoxServiceClipboardOS2Listener: terminating, rc=%Rrc\n", rc);
885	return rc;
886	}
887
888
889	/** @copydoc VBOXSERVICE::pfnWorker */
890	static DECLCALLBACK(int) VBoxServiceClipboardOS2Worker(bool volatile *pfShutdown)
891	{
892	int rc = VERR_GENERAL_FAILURE;
893
894	/*
895	* Standard PM init.
896	*/
897	g_habWorker = RTThreadSelf() != g_ThreadCtrl ? WinInitialize(0) : g_habCtrl;
898	if (g_habWorker != NULLHANDLE)
899	{
900	g_hmqWorker = RTThreadSelf() != g_ThreadCtrl ? WinCreateMsgQueue(g_habWorker, 0) : g_hmqCtrl;
901	if (g_hmqWorker != NULLHANDLE)
902	{
903	/*
904	* Create the object window.
905	*/
906	if (WinRegisterClass(g_habWorker, (PCSZ)"VBoxServiceClipboardClass", VBoxServiceClipboardOS2WinProc, 0, 0))
907	{
908	g_hwndWorker = WinCreateWindow(HWND_OBJECT, /* hwndParent */
909	(PCSZ)"VBoxServiceClipboardClass", /* pszClass */
910	(PCSZ)"VirtualBox Clipboard Service", /* pszName */
911	0, /* flStyle */
912	0, 0, 0, 0, /* x, y, cx, cy */
913	NULLHANDLE, /* hwndOwner */
914	HWND_BOTTOM, /* hwndInsertBehind */
915	42, /* id */
916	NULL, /* pCtlData */
917	NULL); /* pPresParams */
918	if (g_hwndWorker != NULLHANDLE)
919	{
920	VBoxServiceVerbose(3, "g_hwndWorker=%#lx g_habWorker=%#lx g_hmqWorker=%#lx\n", g_hwndWorker, g_habWorker, g_hmqWorker);
921
922	/*
923	* Create the listener thread.
924	*/
925	g_fListenerOkay = false;
926	rc = RTThreadCreate(&g_ThreadListener, VBoxServiceClipboardOS2Listener, (void *)pfShutdown, 0,
927	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "CLIPLISTEN");
928	if (RT_SUCCESS(rc))
929	{
930	RTThreadUserWait(g_ThreadListener, 30*1000);
931	RTThreadUserReset(g_ThreadListener);
932	if (!g_fListenerOkay)
933	RTThreadWait(g_ThreadListener, 60*1000, NULL);
934	if (g_fListenerOkay)
935	{
936	/*
937	* Tell the control thread that it can continue
938	* spawning services.
939	*/
940	RTThreadUserSignal(RTThreadSelf());
941
942	/*
943	* The PM event pump.
944	*/
945	VBoxServiceVerbose(2, "clipboard: Entering PM message loop.\n");
946	rc = VINF_SUCCESS;
947	QMSG qmsg;
948	while (WinGetMsg(g_habWorker, &qmsg, NULLHANDLE, NULLHANDLE, 0))
949	WinDispatchMsg(g_habWorker, &qmsg);
950	VBoxServiceVerbose(2, "clipboard: Exited PM message loop. pfShutdown=%RTbool\n", pfShutdown);
951
952	RTThreadWait(g_ThreadListener, 60*1000, NULL);
953	}
954	g_ThreadListener = NIL_RTTHREAD;
955	}
956
957	/*
958	* Got a WM_QUIT, clean up.
959	*/
960	if (g_hwndWorker != NULLHANDLE)
961	{
962	WinDestroyWindow(g_hwndWorker);
963	g_hwndWorker = NULLHANDLE;
964	}
965	}
966	else
967	VBoxServiceError("WinCreateWindow() failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
968	/* no class deregistration in PM. */
969	}
970	else
971	VBoxServiceError("WinRegisterClass() failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
972
973	if (g_hmqCtrl != g_hmqWorker)
974	WinDestroyMsgQueue(g_hmqWorker);
975	g_hmqWorker = NULLHANDLE;
976	}
977	else
978	VBoxServiceError("WinCreateMsgQueue(,0) failed, lasterr=%lx\n", WinGetLastError(g_habWorker));
979
980	if (g_habCtrl != g_habWorker)
981	WinTerminate(g_habWorker);
982	g_habWorker = NULLHANDLE;
983	}
984	else
985	VBoxServiceError("WinInitialize(0) failed, lasterr=%lx\n", WinGetLastError(NULLHANDLE));
986
987	return rc;
988	}
989
990
991	/** @copydoc VBOXSERVICE::pfnStop */
992	static DECLCALLBACK(void) VBoxServiceClipboardOS2Stop(void)
993	{
994	if ( g_hmqWorker != NULLHANDLE
995	&& !WinPostQueueMsg(g_hmqWorker, WM_QUIT, NULL, NULL))
996	VBoxServiceError("WinPostQueueMsg(g_hmqWorker, WM_QUIT, 0,0) failed, lasterr=%lx\n", WinGetLastError(g_habCtrl));
997	}
998
999
1000	/** @copydoc VBOXSERVICE::pfnTerm */
1001	static DECLCALLBACK(void) VBoxServiceClipboardOS2Term(void)
1002	{
1003	VBoxServiceVerbose(4, "clipboard: disconnecting %#x\n", g_u32ClientId);
1004	VbglR3ClipboardDisconnect(g_u32ClientId);
1005	g_u32ClientId = 0;
1006	WinDestroyMsgQueue(g_hmqCtrl);
1007	g_hmqCtrl = NULLHANDLE;
1008	WinTerminate(g_habCtrl);
1009	g_habCtrl = NULLHANDLE;
1010	}
1011
1012
1013	/**
1014	* The OS/2 'clipboard' service description.
1015	*/
1016	VBOXSERVICE g_Clipboard =
1017	{
1018	/* pszName. */
1019	"clipboard",
1020	/* pszDescription. */
1021	"Shared Clipboard",
1022	/* pszUsage. */
1023	""
1024	,
1025	/* pszOptions. */
1026	""
1027	,
1028	/* methods */
1029	VBoxServiceClipboardOS2PreInit,
1030	VBoxServiceClipboardOS2Option,
1031	VBoxServiceClipboardOS2Init,
1032	VBoxServiceClipboardOS2Worker,
1033	VBoxServiceClipboardOS2Stop,
1034	VBoxServiceClipboardOS2Term
1035	};
1036

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source: vbox/trunk/src/VBox/Additions/common/VBoxService/VBoxServiceClipboard-os2.cpp@ 10719

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