SessionImpl.cpp@ 42213

Last change on this file since 42213 was 42084, checked in by vboxsync, 13 years ago
Guest Control 2.0: Hacking in progress.
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1	/* $Id: SessionImpl.cpp 42084 2012-07-10 10:17:20Z vboxsync $ */
2	/** @file
3	* VBox Client Session COM Class implementation in VBoxC.
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 Oracle Corporation
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
18	#ifdef VBOX_WITH_SYS_V_IPC_SESSION_WATCHER
19	# include <errno.h>
20	# include <sys/types.h>
21	# include <sys/stat.h>
22	# include <sys/ipc.h>
23	# include <sys/sem.h>
24	#endif
25
26	#include "SessionImpl.h"
27	#include "ConsoleImpl.h"
28	#include "Global.h"
29
30	#include "AutoCaller.h"
31	#include "Logging.h"
32
33	#include <VBox/err.h>
34	#include <iprt/process.h>
35
36	#if defined(RT_OS_WINDOWS) \|\| defined (RT_OS_OS2)
37	/** VM IPC mutex holder thread */
38	static DECLCALLBACK(int) IPCMutexHolderThread(RTTHREAD Thread, void *pvUser);
39	#endif
40
41	/**
42	* Local macro to check whether the session is open and return an error if not.
43	* @note Don't forget to do \|Auto[Reader]Lock alock (this);\| before using this
44	* macro.
45	*/
46	#define CHECK_OPEN() \
47	do { \
48	if (mState != SessionState_Locked) \
49	return setError(E_UNEXPECTED, tr ("The session is not locked (session state: %s)"), Global::stringifySessionState(mState)); \
50	} while (0)
51
52	// constructor / destructor
53	/////////////////////////////////////////////////////////////////////////////
54
55	HRESULT Session::FinalConstruct()
56	{
57	LogFlowThisFunc(("\n"));
58
59	HRESULT rc = init();
60
61	BaseFinalConstruct();
62
63	return rc;
64	}
65
66	void Session::FinalRelease()
67	{
68	LogFlowThisFunc(("\n"));
69
70	uninit();
71
72	BaseFinalRelease();
73	}
74
75	// public initializer/uninitializer for internal purposes only
76	/////////////////////////////////////////////////////////////////////////////
77
78	/**
79	* Initializes the Session object.
80	*/
81	HRESULT Session::init()
82	{
83	/* Enclose the state transition NotReady->InInit->Ready */
84	AutoInitSpan autoInitSpan(this);
85	AssertReturn(autoInitSpan.isOk(), E_FAIL);
86
87	LogFlowThisFuncEnter();
88
89	mState = SessionState_Unlocked;
90	mType = SessionType_Null;
91
92	#if defined(RT_OS_WINDOWS)
93	mIPCSem = NULL;
94	mIPCThreadSem = NULL;
95	#elif defined(RT_OS_OS2)
96	mIPCThread = NIL_RTTHREAD;
97	mIPCThreadSem = NIL_RTSEMEVENT;
98	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
99	mIPCSem = -1;
100	#else
101	# error "Port me!"
102	#endif
103
104	/* Confirm a successful initialization when it's the case */
105	autoInitSpan.setSucceeded();
106
107	LogFlowThisFuncLeave();
108
109	return S_OK;
110	}
111
112	/**
113	* Uninitializes the Session object.
114	*
115	* @note Locks this object for writing.
116	*/
117	void Session::uninit()
118	{
119	LogFlowThisFuncEnter();
120
121	/* Enclose the state transition Ready->InUninit->NotReady */
122	AutoUninitSpan autoUninitSpan(this);
123	if (autoUninitSpan.uninitDone())
124	{
125	LogFlowThisFunc(("Already uninitialized.\n"));
126	LogFlowThisFuncLeave();
127	return;
128	}
129
130	/* close() needs write lock */
131	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
132
133	if (mState != SessionState_Unlocked)
134	{
135	Assert(mState == SessionState_Locked \|\|
136	mState == SessionState_Spawning);
137
138	HRESULT rc = unlockMachine(true /* aFinalRelease /, false / aFromServer */);
139	AssertComRC(rc);
140	}
141
142	LogFlowThisFuncLeave();
143	}
144
145	// ISession properties
146	/////////////////////////////////////////////////////////////////////////////
147
148	STDMETHODIMP Session::COMGETTER(State)(SessionState_T *aState)
149	{
150	CheckComArgOutPointerValid(aState);
151
152	AutoCaller autoCaller(this);
153	if (FAILED(autoCaller.rc())) return autoCaller.rc();
154
155	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
156
157	*aState = mState;
158
159	return S_OK;
160	}
161
162	STDMETHODIMP Session::COMGETTER(Type)(SessionType_T *aType)
163	{
164	CheckComArgOutPointerValid(aType);
165
166	AutoCaller autoCaller(this);
167	if (FAILED(autoCaller.rc())) return autoCaller.rc();
168
169	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
170
171	CHECK_OPEN();
172
173	*aType = mType;
174	return S_OK;
175	}
176
177	STDMETHODIMP Session::COMGETTER(Machine)(IMachine **aMachine)
178	{
179	CheckComArgOutPointerValid(aMachine);
180
181	AutoCaller autoCaller(this);
182	if (FAILED(autoCaller.rc())) return autoCaller.rc();
183
184	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
185
186	CHECK_OPEN();
187
188	HRESULT rc;
189	if (mConsole)
190	rc = mConsole->machine().queryInterfaceTo(aMachine);
191	else
192	rc = mRemoteMachine.queryInterfaceTo(aMachine);
193	if (FAILED(rc))
194	{
195	/** @todo VBox 3.3: replace E_FAIL with rc here. */
196	if (mConsole)
197	setError(E_FAIL, tr("Failed to query the session machine (%Rhrc)"), rc);
198	else if (FAILED_DEAD_INTERFACE(rc))
199	setError(E_FAIL, tr("Peer process crashed"));
200	else
201	setError(E_FAIL, tr("Failed to query the remote session machine (%Rhrc)"), rc);
202	}
203
204	return rc;
205	}
206
207	STDMETHODIMP Session::COMGETTER(Console)(IConsole **aConsole)
208	{
209	CheckComArgOutPointerValid(aConsole);
210
211	AutoCaller autoCaller(this);
212	if (FAILED(autoCaller.rc())) return autoCaller.rc();
213
214	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
215
216	CHECK_OPEN();
217
218	HRESULT rc;
219	if (mConsole)
220	rc = mConsole.queryInterfaceTo(aConsole);
221	else
222	rc = mRemoteConsole.queryInterfaceTo(aConsole);
223
224	if (FAILED(rc))
225	{
226	/** @todo VBox 3.3: replace E_FAIL with rc here. */
227	if (mConsole)
228	setError(E_FAIL, tr("Failed to query the console (%Rhrc)"), rc);
229	else if (FAILED_DEAD_INTERFACE(rc))
230	setError(E_FAIL, tr("Peer process crashed"));
231	else
232	setError(E_FAIL, tr("Failed to query the remote console (%Rhrc)"), rc);
233	}
234
235	return rc;
236	}
237
238	// ISession methods
239	/////////////////////////////////////////////////////////////////////////////
240
241	STDMETHODIMP Session::UnlockMachine()
242	{
243	LogFlowThisFunc(("mState=%d, mType=%d\n", mState, mType));
244
245	AutoCaller autoCaller(this);
246	if (FAILED(autoCaller.rc())) return autoCaller.rc();
247
248	/* close() needs write lock */
249	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
250
251	CHECK_OPEN();
252
253	return unlockMachine(false /* aFinalRelease /, false / aFromServer */);
254	}
255
256	// IInternalSessionControl methods
257	/////////////////////////////////////////////////////////////////////////////
258
259	STDMETHODIMP Session::GetPID(ULONG *aPid)
260	{
261	AssertReturn(aPid, E_POINTER);
262
263	AutoCaller autoCaller(this);
264	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
265
266	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
267
268	*aPid = (ULONG)RTProcSelf();
269	AssertCompile(sizeof(*aPid) == sizeof(RTPROCESS));
270
271	return S_OK;
272	}
273
274	STDMETHODIMP Session::GetRemoteConsole(IConsole **aConsole)
275	{
276	LogFlowThisFuncEnter();
277	AssertReturn(aConsole, E_POINTER);
278
279	AutoCaller autoCaller(this);
280	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
281
282	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
283
284	AssertReturn(mState != SessionState_Unlocked, VBOX_E_INVALID_VM_STATE);
285
286	AssertMsgReturn(mType == SessionType_WriteLock && !!mConsole,
287	("This is not a direct session!\n"),
288	VBOX_E_INVALID_OBJECT_STATE);
289
290	/* return a failure if the session already transitioned to Closing
291	* but the server hasn't processed Machine::OnSessionEnd() yet. */
292	if (mState != SessionState_Locked)
293	return VBOX_E_INVALID_VM_STATE;
294
295	mConsole.queryInterfaceTo(aConsole);
296
297	LogFlowThisFuncLeave();
298
299	return S_OK;
300	}
301
302	STDMETHODIMP Session::AssignMachine(IMachine *aMachine)
303	{
304	LogFlowThisFuncEnter();
305	LogFlowThisFunc(("aMachine=%p\n", aMachine));
306
307	AutoCaller autoCaller(this);
308	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
309
310	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
311
312	AssertReturn(mState == SessionState_Unlocked, VBOX_E_INVALID_VM_STATE);
313
314	if (!aMachine)
315	{
316	/*
317	* A special case: the server informs us that this session has been
318	* passed to IMachine::launchVMProcess() so this session will become
319	* remote (but not existing) when AssignRemoteMachine() is called.
320	*/
321
322	AssertReturn(mType == SessionType_Null, VBOX_E_INVALID_OBJECT_STATE);
323	mType = SessionType_Remote;
324	mState = SessionState_Spawning;
325
326	LogFlowThisFuncLeave();
327	return S_OK;
328	}
329
330	HRESULT rc = E_FAIL;
331
332	/* query IInternalMachineControl interface */
333	mControl = aMachine;
334	AssertReturn(!!mControl, E_FAIL);
335
336	rc = mConsole.createObject();
337	AssertComRCReturn(rc, rc);
338
339	rc = mConsole->init(aMachine, mControl);
340	AssertComRCReturn(rc, rc);
341
342	rc = grabIPCSemaphore();
343
344	/*
345	* Reference the VirtualBox object to ensure the server is up
346	* until the session is closed
347	*/
348	if (SUCCEEDED(rc))
349	rc = aMachine->COMGETTER(Parent)(mVirtualBox.asOutParam());
350
351	if (SUCCEEDED(rc))
352	{
353	mType = SessionType_WriteLock;
354	mState = SessionState_Locked;
355	}
356	else
357	{
358	/* some cleanup */
359	mControl.setNull();
360	mConsole->uninit();
361	mConsole.setNull();
362	}
363
364	LogFlowThisFunc(("rc=%08X\n", rc));
365	LogFlowThisFuncLeave();
366
367	return rc;
368	}
369
370	STDMETHODIMP Session::AssignRemoteMachine(IMachine aMachine, IConsole aConsole)
371	{
372	LogFlowThisFuncEnter();
373	LogFlowThisFunc(("aMachine=%p, aConsole=%p\n", aMachine, aConsole));
374
375	AssertReturn(aMachine && aConsole, E_INVALIDARG);
376
377	AutoCaller autoCaller(this);
378	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
379
380	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
381
382	AssertReturn(mState == SessionState_Unlocked \|\|
383	mState == SessionState_Spawning, VBOX_E_INVALID_VM_STATE);
384
385	HRESULT rc = E_FAIL;
386
387	/* query IInternalMachineControl interface */
388	mControl = aMachine;
389	AssertReturn(!!mControl, E_FAIL);
390
391	/// @todo (dmik)
392	// currently, the remote session returns the same machine and
393	// console objects as the direct session, thus giving the
394	// (remote) client full control over the direct session. For the
395	// console, it is the desired behavior (the ability to control
396	// VM execution is a must for the remote session). What about
397	// the machine object, we may want to prevent the remote client
398	// from modifying machine data. In this case, we must:
399	// 1) assign the Machine object (instead of the SessionMachine
400	// object that is passed to this method) to mRemoteMachine;
401	// 2) remove GetMachine() property from the IConsole interface
402	// because it always returns the SessionMachine object
403	// (alternatively, we can supply a separate IConsole
404	// implementation that will return the Machine object in
405	// response to GetMachine()).
406
407	mRemoteMachine = aMachine;
408	mRemoteConsole = aConsole;
409
410	/*
411	* Reference the VirtualBox object to ensure the server is up
412	* until the session is closed
413	*/
414	rc = aMachine->COMGETTER(Parent)(mVirtualBox.asOutParam());
415
416	if (SUCCEEDED(rc))
417	{
418	/*
419	* RemoteSession type can be already set by AssignMachine() when its
420	* argument is NULL (a special case)
421	*/
422	if (mType != SessionType_Remote)
423	mType = SessionType_Shared;
424	else
425	Assert(mState == SessionState_Spawning);
426
427	mState = SessionState_Locked;
428	}
429	else
430	{
431	/* some cleanup */
432	mControl.setNull();
433	mRemoteMachine.setNull();
434	mRemoteConsole.setNull();
435	}
436
437	LogFlowThisFunc(("rc=%08X\n", rc));
438	LogFlowThisFuncLeave();
439
440	return rc;
441	}
442
443	STDMETHODIMP Session::UpdateMachineState(MachineState_T aMachineState)
444	{
445	AutoCaller autoCaller(this);
446
447	if (autoCaller.state() != Ready)
448	{
449	/*
450	* We might have already entered Session::uninit() at this point, so
451	* return silently (not interested in the state change during uninit)
452	*/
453	LogFlowThisFunc(("Already uninitialized.\n"));
454	return S_OK;
455	}
456
457	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
458
459	if (mState == SessionState_Unlocking)
460	{
461	LogFlowThisFunc(("Already being unlocked.\n"));
462	return S_OK;
463	}
464
465	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
466	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
467
468	AssertReturn(!mControl.isNull(), E_FAIL);
469	AssertReturn(!mConsole.isNull(), E_FAIL);
470
471	return mConsole->updateMachineState(aMachineState);
472	}
473
474	STDMETHODIMP Session::Uninitialize()
475	{
476	LogFlowThisFuncEnter();
477
478	AutoCaller autoCaller(this);
479
480	HRESULT rc = S_OK;
481
482	if (autoCaller.state() == Ready)
483	{
484	/* close() needs write lock */
485	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
486
487	LogFlowThisFunc(("mState=%s, mType=%d\n", Global::stringifySessionState(mState), mType));
488
489	if (mState == SessionState_Unlocking)
490	{
491	LogFlowThisFunc(("Already being unlocked.\n"));
492	return S_OK;
493	}
494
495	#ifndef DEBUG_andy /* Don't bug me -- now time to fix this at the moment. */
496	AssertReturn(mState == SessionState_Locked \|\|
497	mState == SessionState_Spawning, VBOX_E_INVALID_VM_STATE);
498	#endif
499
500	/* close ourselves */
501	rc = unlockMachine(false /* aFinalRelease /, true / aFromServer */);
502	}
503	else if (autoCaller.state() == InUninit)
504	{
505	/*
506	* We might have already entered Session::uninit() at this point,
507	* return silently
508	*/
509	LogFlowThisFunc(("Already uninitialized.\n"));
510	}
511	else
512	{
513	LogWarningThisFunc(("UNEXPECTED uninitialization!\n"));
514	rc = autoCaller.rc();
515	}
516
517	LogFlowThisFunc(("rc=%08X\n", rc));
518	LogFlowThisFuncLeave();
519
520	return rc;
521	}
522
523	STDMETHODIMP Session::OnNetworkAdapterChange(INetworkAdapter *networkAdapter, BOOL changeAdapter)
524	{
525	LogFlowThisFunc(("\n"));
526
527	AutoCaller autoCaller(this);
528	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
529
530	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
531	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
532	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
533
534	return mConsole->onNetworkAdapterChange(networkAdapter, changeAdapter);
535	}
536
537	STDMETHODIMP Session::OnSerialPortChange(ISerialPort *serialPort)
538	{
539	LogFlowThisFunc(("\n"));
540
541	AutoCaller autoCaller(this);
542	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
543
544	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
545	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
546	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
547
548	return mConsole->onSerialPortChange(serialPort);
549	}
550
551	STDMETHODIMP Session::OnParallelPortChange(IParallelPort *parallelPort)
552	{
553	LogFlowThisFunc(("\n"));
554
555	AutoCaller autoCaller(this);
556	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
557
558	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
559	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
560	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
561
562	return mConsole->onParallelPortChange(parallelPort);
563	}
564
565	STDMETHODIMP Session::OnStorageControllerChange()
566	{
567	LogFlowThisFunc(("\n"));
568
569	AutoCaller autoCaller(this);
570	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
571
572	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
573	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
574	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
575
576	return mConsole->onStorageControllerChange();
577	}
578
579	STDMETHODIMP Session::OnMediumChange(IMediumAttachment *aMediumAttachment, BOOL aForce)
580	{
581	LogFlowThisFunc(("\n"));
582
583	AutoCaller autoCaller(this);
584	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
585
586	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
587	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
588	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
589
590	return mConsole->onMediumChange(aMediumAttachment, aForce);
591	}
592
593	STDMETHODIMP Session::OnCPUChange(ULONG aCPU, BOOL aRemove)
594	{
595	LogFlowThisFunc(("\n"));
596
597	AutoCaller autoCaller(this);
598	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
599
600	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
601	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
602	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
603
604	return mConsole->onCPUChange(aCPU, aRemove);
605	}
606
607	STDMETHODIMP Session::OnCPUExecutionCapChange(ULONG aExecutionCap)
608	{
609	LogFlowThisFunc(("\n"));
610
611	AutoCaller autoCaller(this);
612	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
613
614	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
615	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
616	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
617
618	return mConsole->onCPUExecutionCapChange(aExecutionCap);
619	}
620
621	STDMETHODIMP Session::OnVRDEServerChange(BOOL aRestart)
622	{
623	LogFlowThisFunc(("\n"));
624
625	AutoCaller autoCaller(this);
626	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
627
628	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
629	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
630	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
631
632	return mConsole->onVRDEServerChange(aRestart);
633	}
634
635	STDMETHODIMP Session::OnUSBControllerChange()
636	{
637	LogFlowThisFunc(("\n"));
638
639	AutoCaller autoCaller(this);
640	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
641
642	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
643	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
644	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
645
646	return mConsole->onUSBControllerChange();
647	}
648
649	STDMETHODIMP Session::OnSharedFolderChange(BOOL aGlobal)
650	{
651	LogFlowThisFunc(("\n"));
652
653	AutoCaller autoCaller(this);
654	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
655
656	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
657	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
658	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
659
660	return mConsole->onSharedFolderChange(aGlobal);
661	}
662
663	STDMETHODIMP Session::OnClipboardModeChange(ClipboardMode_T aClipboardMode)
664	{
665	LogFlowThisFunc(("\n"));
666
667	AutoCaller autoCaller(this);
668	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
669
670	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
671	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
672	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
673
674	return mConsole->onClipboardModeChange(aClipboardMode);
675	}
676
677	STDMETHODIMP Session::OnUSBDeviceAttach(IUSBDevice *aDevice,
678	IVirtualBoxErrorInfo *aError,
679	ULONG aMaskedIfs)
680	{
681	LogFlowThisFunc(("\n"));
682
683	AutoCaller autoCaller(this);
684	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
685
686	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
687	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
688	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
689
690	return mConsole->onUSBDeviceAttach(aDevice, aError, aMaskedIfs);
691	}
692
693	STDMETHODIMP Session::OnUSBDeviceDetach(IN_BSTR aId,
694	IVirtualBoxErrorInfo *aError)
695	{
696	LogFlowThisFunc(("\n"));
697
698	AutoCaller autoCaller(this);
699	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
700
701	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
702	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
703	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
704
705	return mConsole->onUSBDeviceDetach(aId, aError);
706	}
707
708	STDMETHODIMP Session::OnShowWindow(BOOL aCheck, BOOL aCanShow, LONG64 aWinId)
709	{
710	AutoCaller autoCaller(this);
711	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
712
713	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
714
715	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
716
717	if (mState != SessionState_Locked)
718	{
719	/* the call from Machine issued when the session is open can arrive
720	* after the session starts closing or gets closed. Note that when
721	* aCheck is false, we return E_FAIL to indicate that aWinId we return
722	* is not valid */
723	*aCanShow = FALSE;
724	*aWinId = 0;
725	return aCheck ? S_OK : E_FAIL;
726	}
727
728	return mConsole->onShowWindow(aCheck, aCanShow, aWinId);
729	}
730
731	STDMETHODIMP Session::OnBandwidthGroupChange(IBandwidthGroup *aBandwidthGroup)
732	{
733	LogFlowThisFunc(("\n"));
734
735	AutoCaller autoCaller(this);
736	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
737
738	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
739	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
740	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
741
742	return mConsole->onBandwidthGroupChange(aBandwidthGroup);
743	}
744
745	STDMETHODIMP Session::OnStorageDeviceChange(IMediumAttachment *aMediumAttachment, BOOL aRemove)
746	{
747	LogFlowThisFunc(("\n"));
748
749	AutoCaller autoCaller(this);
750	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
751
752	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
753	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
754	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
755
756	return mConsole->onStorageDeviceChange(aMediumAttachment, aRemove);
757	}
758
759	STDMETHODIMP Session::AccessGuestProperty(IN_BSTR aName, IN_BSTR aValue, IN_BSTR aFlags,
760	BOOL aIsSetter, BSTR aRetValue, LONG64 aRetTimestamp, BSTR *aRetFlags)
761	{
762	#ifdef VBOX_WITH_GUEST_PROPS
763	AutoCaller autoCaller(this);
764	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
765
766	if (mState != SessionState_Locked)
767	return setError(VBOX_E_INVALID_VM_STATE,
768	tr("Machine is not locked by session (session state: %s)."),
769	Global::stringifySessionState(mState));
770	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
771	CheckComArgStrNotEmptyOrNull(aName);
772	if (!aIsSetter && !VALID_PTR(aRetValue))
773	return E_POINTER;
774	if (!aIsSetter && !VALID_PTR(aRetTimestamp))
775	return E_POINTER;
776	if (!aIsSetter && !VALID_PTR(aRetFlags))
777	return E_POINTER;
778	/* aValue can be NULL for a setter call if the property is to be deleted. */
779	if (aIsSetter && (aValue != NULL) && !VALID_PTR(aValue))
780	return E_INVALIDARG;
781	/* aFlags can be null if it is to be left as is */
782	if (aIsSetter && (aFlags != NULL) && !VALID_PTR(aFlags))
783	return E_INVALIDARG;
784	if (!aIsSetter)
785	return mConsole->getGuestProperty(aName, aRetValue, aRetTimestamp, aRetFlags);
786	else
787	return mConsole->setGuestProperty(aName, aValue, aFlags);
788	#else /* VBOX_WITH_GUEST_PROPS not defined */
789	ReturnComNotImplemented();
790	#endif /* VBOX_WITH_GUEST_PROPS not defined */
791	}
792
793	STDMETHODIMP Session::EnumerateGuestProperties(IN_BSTR aPatterns,
794	ComSafeArrayOut(BSTR, aNames),
795	ComSafeArrayOut(BSTR, aValues),
796	ComSafeArrayOut(LONG64, aTimestamps),
797	ComSafeArrayOut(BSTR, aFlags))
798	{
799	#ifdef VBOX_WITH_GUEST_PROPS
800	AutoCaller autoCaller(this);
801	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
802
803	if (mState != SessionState_Locked)
804	return setError(VBOX_E_INVALID_VM_STATE,
805	tr("Machine is not locked by session (session state: %s)."),
806	Global::stringifySessionState(mState));
807	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
808	if (!VALID_PTR(aPatterns) && (aPatterns != NULL))
809	return E_POINTER;
810	if (ComSafeArrayOutIsNull(aNames))
811	return E_POINTER;
812	if (ComSafeArrayOutIsNull(aValues))
813	return E_POINTER;
814	if (ComSafeArrayOutIsNull(aTimestamps))
815	return E_POINTER;
816	if (ComSafeArrayOutIsNull(aFlags))
817	return E_POINTER;
818	return mConsole->enumerateGuestProperties(aPatterns,
819	ComSafeArrayOutArg(aNames),
820	ComSafeArrayOutArg(aValues),
821	ComSafeArrayOutArg(aTimestamps),
822	ComSafeArrayOutArg(aFlags));
823	#else /* VBOX_WITH_GUEST_PROPS not defined */
824	ReturnComNotImplemented();
825	#endif /* VBOX_WITH_GUEST_PROPS not defined */
826	}
827
828	STDMETHODIMP Session::OnlineMergeMedium(IMediumAttachment *aMediumAttachment,
829	ULONG aSourceIdx, ULONG aTargetIdx,
830	IMedium aSource, IMedium aTarget,
831	BOOL aMergeForward,
832	IMedium *aParentForTarget,
833	ComSafeArrayIn(IMedium *, aChildrenToReparent),
834	IProgress *aProgress)
835	{
836	AutoCaller autoCaller(this);
837	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
838
839	if (mState != SessionState_Locked)
840	return setError(VBOX_E_INVALID_VM_STATE,
841	tr("Machine is not locked by session (session state: %s)."),
842	Global::stringifySessionState(mState));
843	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
844	CheckComArgNotNull(aMediumAttachment);
845	CheckComArgSafeArrayNotNull(aChildrenToReparent);
846
847	return mConsole->onlineMergeMedium(aMediumAttachment, aSourceIdx,
848	aTargetIdx, aSource, aTarget,
849	aMergeForward, aParentForTarget,
850	ComSafeArrayInArg(aChildrenToReparent),
851	aProgress);
852	}
853
854	STDMETHODIMP Session::EnableVMMStatistics(BOOL aEnable)
855	{
856	AutoCaller autoCaller(this);
857	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
858
859	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
860	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
861	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
862
863	mConsole->enableVMMStatistics(aEnable);
864
865	return S_OK;
866	}
867
868	// private methods
869	///////////////////////////////////////////////////////////////////////////////
870
871	/**
872	* Unlocks a machine associated with the current session.
873	*
874	* @param aFinalRelease called as a result of FinalRelease()
875	* @param aFromServer called as a result of Uninitialize()
876	*
877	* @note To be called only from #uninit(), #UnlockMachine() or #Uninitialize().
878	* @note Locks this object for writing.
879	*/
880	HRESULT Session::unlockMachine(bool aFinalRelease, bool aFromServer)
881	{
882	LogFlowThisFuncEnter();
883	LogFlowThisFunc(("aFinalRelease=%d, isFromServer=%d\n",
884	aFinalRelease, aFromServer));
885
886	AutoCaller autoCaller(this);
887	AssertComRCReturnRC(autoCaller.rc());
888
889	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
890
891	LogFlowThisFunc(("mState=%s, mType=%d\n", Global::stringifySessionState(mState), mType));
892
893	if (mState != SessionState_Locked)
894	{
895	Assert(mState == SessionState_Spawning);
896
897	/* The session object is going to be uninitialized before it has been
898	* assigned a direct console of the machine the client requested to open
899	* a remote session to using IVirtualBox:: openRemoteSession(). It is OK
900	* only if this close request comes from the server (for example, it
901	* detected that the VM process it started terminated before opening a
902	* direct session). Otherwise, it means that the client is too fast and
903	* trying to close the session before waiting for the progress object it
904	* got from IVirtualBox:: openRemoteSession() to complete, so assert. */
905	Assert(aFromServer);
906
907	mState = SessionState_Unlocked;
908	mType = SessionType_Null;
909	#if defined(RT_OS_WINDOWS)
910	Assert(!mIPCSem && !mIPCThreadSem);
911	#elif defined(RT_OS_OS2)
912	Assert(mIPCThread == NIL_RTTHREAD &&
913	mIPCThreadSem == NIL_RTSEMEVENT);
914	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
915	Assert(mIPCSem == -1);
916	#else
917	# error "Port me!"
918	#endif
919	LogFlowThisFuncLeave();
920	return S_OK;
921	}
922
923	/* go to the closing state */
924	mState = SessionState_Unlocking;
925
926	if (mType == SessionType_WriteLock)
927	{
928	mConsole->uninit();
929	mConsole.setNull();
930	}
931	else
932	{
933	mRemoteMachine.setNull();
934	mRemoteConsole.setNull();
935	}
936
937	ComPtr<IProgress> progress;
938
939	if (!aFinalRelease && !aFromServer)
940	{
941	/*
942	* We trigger OnSessionEnd() only when the session closes itself using
943	* Close(). Note that if isFinalRelease = TRUE here, this means that
944	* the client process has already initialized the termination procedure
945	* without issuing Close() and the IPC channel is no more operational --
946	* so we cannot call the server's method (it will definitely fail). The
947	* server will instead simply detect the abnormal client death (since
948	* OnSessionEnd() is not called) and reset the machine state to Aborted.
949	*/
950
951	/*
952	* while waiting for OnSessionEnd() to complete one of our methods
953	* can be called by the server (for example, Uninitialize(), if the
954	* direct session has initiated a closure just a bit before us) so
955	* we need to release the lock to avoid deadlocks. The state is already
956	* SessionState_Closing here, so it's safe.
957	*/
958	alock.release();
959
960	LogFlowThisFunc(("Calling mControl->OnSessionEnd()...\n"));
961	HRESULT rc = mControl->OnSessionEnd(this, progress.asOutParam());
962	LogFlowThisFunc(("mControl->OnSessionEnd()=%08X\n", rc));
963
964	alock.acquire();
965
966	/*
967	* If we get E_UNEXPECTED this means that the direct session has already
968	* been closed, we're just too late with our notification and nothing more
969	*
970	* bird: Seems E_ACCESSDENIED is what gets returned these days; see
971	* VirtualBoxBase::addCaller.
972	*/
973	if (mType != SessionType_WriteLock && (rc == E_UNEXPECTED \|\| rc == E_ACCESSDENIED))
974	rc = S_OK;
975
976	#ifndef DEBUG_bird /* I don't want clients crashing on me just because VBoxSVC went belly up. */
977	AssertComRC(rc);
978	#endif
979	}
980
981	mControl.setNull();
982
983	if (mType == SessionType_WriteLock)
984	{
985	releaseIPCSemaphore();
986	if (!aFinalRelease && !aFromServer)
987	{
988	/*
989	* Wait for the server to grab the semaphore and destroy the session
990	* machine (allowing us to open a new session with the same machine
991	* once this method returns)
992	*/
993	Assert(!!progress);
994	if (progress)
995	progress->WaitForCompletion(-1);
996	}
997	}
998
999	mState = SessionState_Unlocked;
1000	mType = SessionType_Null;
1001
1002	/* release the VirtualBox instance as the very last step */
1003	mVirtualBox.setNull();
1004
1005	LogFlowThisFuncLeave();
1006	return S_OK;
1007	}
1008
1009	/** @note To be called only from #AssignMachine() */
1010	HRESULT Session::grabIPCSemaphore()
1011	{
1012	HRESULT rc = E_FAIL;
1013
1014	/* open the IPC semaphore based on the sessionId and try to grab it */
1015	Bstr ipcId;
1016	rc = mControl->GetIPCId(ipcId.asOutParam());
1017	AssertComRCReturnRC(rc);
1018
1019	LogFlowThisFunc(("ipcId='%ls'\n", ipcId.raw()));
1020
1021	#if defined(RT_OS_WINDOWS)
1022
1023	/*
1024	* Since Session is an MTA object, this method can be executed on
1025	* any thread, and this thread will not necessarily match the thread on
1026	* which close() will be called later. Therefore, we need a separate
1027	* thread to hold the IPC mutex and then release it in close().
1028	*/
1029
1030	mIPCThreadSem = ::CreateEvent(NULL, FALSE, FALSE, NULL);
1031	AssertMsgReturn(mIPCThreadSem,
1032	("Cannot create an event sem, err=%d", ::GetLastError()),
1033	E_FAIL);
1034
1035	void *data[3];
1036	data[0] = (void*)(BSTR)ipcId.raw();
1037	data[1] = (void*)mIPCThreadSem;
1038	data[2] = 0; /* will get an output from the thread */
1039
1040	/* create a thread to hold the IPC mutex until signalled to release it */
1041	RTTHREAD tid;
1042	int vrc = RTThreadCreate(&tid, IPCMutexHolderThread, (void*)data, 0, RTTHREADTYPE_MAIN_WORKER, 0, "IPCHolder");
1043	AssertRCReturn(vrc, E_FAIL);
1044
1045	/* wait until thread init is completed */
1046	DWORD wrc = ::WaitForSingleObject(mIPCThreadSem, INFINITE);
1047	AssertMsg(wrc == WAIT_OBJECT_0, ("Wait failed, err=%d\n", ::GetLastError()));
1048	Assert(data[2]);
1049
1050	if (wrc == WAIT_OBJECT_0 && data[2])
1051	{
1052	/* memorize the event sem we should signal in close() */
1053	mIPCSem = (HANDLE)data[2];
1054	rc = S_OK;
1055	}
1056	else
1057	{
1058	::CloseHandle(mIPCThreadSem);
1059	mIPCThreadSem = NULL;
1060	rc = E_FAIL;
1061	}
1062
1063	#elif defined(RT_OS_OS2)
1064
1065	/* We use XPCOM where any message (including close()) can arrive on any
1066	* worker thread (which will not necessarily match this thread that opens
1067	* the mutex). Therefore, we need a separate thread to hold the IPC mutex
1068	* and then release it in close(). */
1069
1070	int vrc = RTSemEventCreate(&mIPCThreadSem);
1071	AssertRCReturn(vrc, E_FAIL);
1072
1073	void *data[3];
1074	data[0] = (void*)ipcId.raw();
1075	data[1] = (void*)mIPCThreadSem;
1076	data[2] = (void)false; / will get the thread result here */
1077
1078	/* create a thread to hold the IPC mutex until signalled to release it */
1079	vrc = RTThreadCreate(&mIPCThread, IPCMutexHolderThread, (void *) data,
1080	0, RTTHREADTYPE_MAIN_WORKER, 0, "IPCHolder");
1081	AssertRCReturn(vrc, E_FAIL);
1082
1083	/* wait until thread init is completed */
1084	vrc = RTThreadUserWait (mIPCThread, RT_INDEFINITE_WAIT);
1085	AssertReturn(RT_SUCCESS(vrc) \|\| vrc == VERR_INTERRUPTED, E_FAIL);
1086
1087	/* the thread must succeed */
1088	AssertReturn((bool)data[2], E_FAIL);
1089
1090	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
1091
1092	# ifdef VBOX_WITH_NEW_SYS_V_KEYGEN
1093	Utf8Str ipcKey = ipcId;
1094	key_t key = RTStrToUInt32(ipcKey.c_str());
1095	AssertMsgReturn (key != 0,
1096	("Key value of 0 is not valid for IPC semaphore"),
1097	E_FAIL);
1098	# else /* !VBOX_WITH_NEW_SYS_V_KEYGEN */
1099	Utf8Str semName = ipcId;
1100	char *pszSemName = NULL;
1101	RTStrUtf8ToCurrentCP (&pszSemName, semName);
1102	key_t key = ::ftok (pszSemName, 'V');
1103	RTStrFree (pszSemName);
1104	# endif /* !VBOX_WITH_NEW_SYS_V_KEYGEN */
1105
1106	mIPCSem = ::semget (key, 0, 0);
1107	AssertMsgReturn (mIPCSem >= 0,
1108	("Cannot open IPC semaphore, errno=%d", errno),
1109	E_FAIL);
1110
1111	/* grab the semaphore */
1112	::sembuf sop = { 0, -1, SEM_UNDO };
1113	int rv = ::semop (mIPCSem, &sop, 1);
1114	AssertMsgReturn (rv == 0,
1115	("Cannot grab IPC semaphore, errno=%d", errno),
1116	E_FAIL);
1117
1118	#else
1119	# error "Port me!"
1120	#endif
1121
1122	return rc;
1123	}
1124
1125	/** @note To be called only from #close() */
1126	void Session::releaseIPCSemaphore()
1127	{
1128	/* release the IPC semaphore */
1129	#if defined(RT_OS_WINDOWS)
1130
1131	if (mIPCSem && mIPCThreadSem)
1132	{
1133	/*
1134	* tell the thread holding the IPC mutex to release it;
1135	* it will close mIPCSem handle
1136	*/
1137	::SetEvent (mIPCSem);
1138	/* wait for the thread to finish */
1139	::WaitForSingleObject (mIPCThreadSem, INFINITE);
1140	::CloseHandle (mIPCThreadSem);
1141
1142	mIPCThreadSem = NULL;
1143	mIPCSem = NULL;
1144	}
1145
1146	#elif defined(RT_OS_OS2)
1147
1148	if (mIPCThread != NIL_RTTHREAD)
1149	{
1150	Assert (mIPCThreadSem != NIL_RTSEMEVENT);
1151
1152	/* tell the thread holding the IPC mutex to release it */
1153	int vrc = RTSemEventSignal (mIPCThreadSem);
1154	AssertRC(vrc == NO_ERROR);
1155
1156	/* wait for the thread to finish */
1157	vrc = RTThreadUserWait (mIPCThread, RT_INDEFINITE_WAIT);
1158	Assert (RT_SUCCESS(vrc) \|\| vrc == VERR_INTERRUPTED);
1159
1160	mIPCThread = NIL_RTTHREAD;
1161	}
1162
1163	if (mIPCThreadSem != NIL_RTSEMEVENT)
1164	{
1165	RTSemEventDestroy (mIPCThreadSem);
1166	mIPCThreadSem = NIL_RTSEMEVENT;
1167	}
1168
1169	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
1170
1171	if (mIPCSem >= 0)
1172	{
1173	::sembuf sop = { 0, 1, SEM_UNDO };
1174	::semop (mIPCSem, &sop, 1);
1175
1176	mIPCSem = -1;
1177	}
1178
1179	#else
1180	# error "Port me!"
1181	#endif
1182	}
1183
1184	#if defined(RT_OS_WINDOWS)
1185	/** VM IPC mutex holder thread */
1186	DECLCALLBACK(int) IPCMutexHolderThread (RTTHREAD Thread, void *pvUser)
1187	{
1188	LogFlowFuncEnter();
1189
1190	Assert (pvUser);
1191	void data = (void ) pvUser;
1192
1193	BSTR sessionId = (BSTR)data[0];
1194	HANDLE initDoneSem = (HANDLE)data[1];
1195
1196	HANDLE ipcMutex = ::OpenMutex (MUTEX_ALL_ACCESS, FALSE, sessionId);
1197	AssertMsg (ipcMutex, ("cannot open IPC mutex, err=%d\n", ::GetLastError()));
1198
1199	if (ipcMutex)
1200	{
1201	/* grab the mutex */
1202	DWORD wrc = ::WaitForSingleObject (ipcMutex, 0);
1203	AssertMsg (wrc == WAIT_OBJECT_0, ("cannot grab IPC mutex, err=%d\n", wrc));
1204	if (wrc == WAIT_OBJECT_0)
1205	{
1206	HANDLE finishSem = ::CreateEvent (NULL, FALSE, FALSE, NULL);
1207	AssertMsg (finishSem, ("cannot create event sem, err=%d\n", ::GetLastError()));
1208	if (finishSem)
1209	{
1210	data[2] = (void*)finishSem;
1211	/* signal we're done with init */
1212	::SetEvent (initDoneSem);
1213	/* wait until we're signaled to release the IPC mutex */
1214	::WaitForSingleObject (finishSem, INFINITE);
1215	/* release the IPC mutex */
1216	LogFlow (("IPCMutexHolderThread(): releasing IPC mutex...\n"));
1217	BOOL success = ::ReleaseMutex (ipcMutex);
1218	AssertMsg (success, ("cannot release mutex, err=%d\n", ::GetLastError()));
1219	::CloseHandle (ipcMutex);
1220	::CloseHandle (finishSem);
1221	}
1222	}
1223	}
1224
1225	/* signal we're done */
1226	::SetEvent (initDoneSem);
1227
1228	LogFlowFuncLeave();
1229
1230	return 0;
1231	}
1232	#endif
1233
1234	#if defined(RT_OS_OS2)
1235	/** VM IPC mutex holder thread */
1236	DECLCALLBACK(int) IPCMutexHolderThread (RTTHREAD Thread, void *pvUser)
1237	{
1238	LogFlowFuncEnter();
1239
1240	Assert (pvUser);
1241	void data = (void ) pvUser;
1242
1243	Utf8Str ipcId = (BSTR)data[0];
1244	RTSEMEVENT finishSem = (RTSEMEVENT)data[1];
1245
1246	LogFlowFunc (("ipcId='%s', finishSem=%p\n", ipcId.raw(), finishSem));
1247
1248	HMTX ipcMutex = NULLHANDLE;
1249	APIRET arc = ::DosOpenMutexSem ((PSZ) ipcId.raw(), &ipcMutex);
1250	AssertMsg (arc == NO_ERROR, ("cannot open IPC mutex, arc=%ld\n", arc));
1251
1252	if (arc == NO_ERROR)
1253	{
1254	/* grab the mutex */
1255	LogFlowFunc (("grabbing IPC mutex...\n"));
1256	arc = ::DosRequestMutexSem (ipcMutex, SEM_IMMEDIATE_RETURN);
1257	AssertMsg (arc == NO_ERROR, ("cannot grab IPC mutex, arc=%ld\n", arc));
1258	if (arc == NO_ERROR)
1259	{
1260	/* store the answer */
1261	data[2] = (void*)true;
1262	/* signal we're done */
1263	int vrc = RTThreadUserSignal (Thread);
1264	AssertRC(vrc);
1265
1266	/* wait until we're signaled to release the IPC mutex */
1267	LogFlowFunc (("waiting for termination signal..\n"));
1268	vrc = RTSemEventWait (finishSem, RT_INDEFINITE_WAIT);
1269	Assert (arc == ERROR_INTERRUPT \|\| ERROR_TIMEOUT);
1270
1271	/* release the IPC mutex */
1272	LogFlowFunc (("releasing IPC mutex...\n"));
1273	arc = ::DosReleaseMutexSem (ipcMutex);
1274	AssertMsg (arc == NO_ERROR, ("cannot release mutex, arc=%ld\n", arc));
1275	}
1276
1277	::DosCloseMutexSem (ipcMutex);
1278	}
1279
1280	/* store the answer */
1281	data[1] = (void*)false;
1282	/* signal we're done */
1283	int vrc = RTThreadUserSignal (Thread);
1284	AssertRC(vrc);
1285
1286	LogFlowFuncLeave();
1287
1288	return 0;
1289	}
1290	#endif
1291	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-client/SessionImpl.cpp@ 42213

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