ProgressImpl.cpp@ 41105

Last change on this file since 41105 was 40257, checked in by vboxsync, 13 years ago
Main/Medium: rework locking scheme to solve lock order violations and long GUI start up time caused by too much locking Main/all: Remove the enter and leave methods from write locks, they cause hard to find locking problems. Better solve them explicitly.
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File size: 55.6 KB

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1	/* $Id: ProgressImpl.cpp 40257 2012-02-27 09:25:12Z vboxsync $ */
2	/** @file
3	*
4	* VirtualBox Progress COM class implementation
5	*/
6
7	/*
8	* Copyright (C) 2006-2012 Oracle Corporation
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19	#include <iprt/types.h>
20
21	#if defined(VBOX_WITH_XPCOM)
22	#include <nsIServiceManager.h>
23	#include <nsIExceptionService.h>
24	#include <nsCOMPtr.h>
25	#endif /* defined(VBOX_WITH_XPCOM) */
26
27	#include "ProgressCombinedImpl.h"
28
29	#include "VirtualBoxImpl.h"
30	#include "VirtualBoxErrorInfoImpl.h"
31
32	#include "Logging.h"
33
34	#include <iprt/time.h>
35	#include <iprt/semaphore.h>
36	#include <iprt/cpp/utils.h>
37
38	#include <VBox/err.h>
39
40	////////////////////////////////////////////////////////////////////////////////
41	// ProgressBase class
42	////////////////////////////////////////////////////////////////////////////////
43
44	// constructor / destructor
45	////////////////////////////////////////////////////////////////////////////////
46
47	ProgressBase::ProgressBase()
48	#if !defined(VBOX_COM_INPROC)
49	: mParent(NULL)
50	#endif
51	{
52	}
53
54	ProgressBase::~ProgressBase()
55	{
56	}
57
58
59	/**
60	* Subclasses must call this method from their FinalConstruct() implementations.
61	*/
62	HRESULT ProgressBase::FinalConstruct()
63	{
64	mCancelable = FALSE;
65	mCompleted = FALSE;
66	mCanceled = FALSE;
67	mResultCode = S_OK;
68
69	m_cOperations
70	= m_ulTotalOperationsWeight
71	= m_ulOperationsCompletedWeight
72	= m_ulCurrentOperation
73	= m_ulCurrentOperationWeight
74	= m_ulOperationPercent
75	= m_cMsTimeout
76	= 0;
77
78	// get creation timestamp
79	m_ullTimestamp = RTTimeMilliTS();
80
81	m_pfnCancelCallback = NULL;
82	m_pvCancelUserArg = NULL;
83
84	return BaseFinalConstruct();
85	}
86
87	// protected initializer/uninitializer for internal purposes only
88	////////////////////////////////////////////////////////////////////////////////
89
90	/**
91	* Initializes the progress base object.
92	*
93	* Subclasses should call this or any other #protectedInit() method from their
94	* init() implementations.
95	*
96	* @param aAutoInitSpan AutoInitSpan object instantiated by a subclass.
97	* @param aParent Parent object (only for server-side Progress objects).
98	* @param aInitiator Initiator of the task (for server-side objects. Can be
99	* NULL which means initiator = parent, otherwise must not
100	* be NULL).
101	* @param aDescription ask description.
102	* @param aID Address of result GUID structure (optional).
103	*
104	* @return COM result indicator.
105	*/
106	HRESULT ProgressBase::protectedInit(AutoInitSpan &aAutoInitSpan,
107	#if !defined(VBOX_COM_INPROC)
108	VirtualBox *aParent,
109	#endif
110	IUnknown *aInitiator,
111	CBSTR aDescription,
112	OUT_GUID aId /* = NULL */)
113	{
114	/* Guarantees subclasses call this method at the proper time */
115	NOREF(aAutoInitSpan);
116
117	AutoCaller autoCaller(this);
118	AssertReturn(autoCaller.state() == InInit, E_FAIL);
119
120	#if !defined(VBOX_COM_INPROC)
121	AssertReturn(aParent, E_INVALIDARG);
122	#else
123	AssertReturn(aInitiator, E_INVALIDARG);
124	#endif
125
126	AssertReturn(aDescription, E_INVALIDARG);
127
128	#if !defined(VBOX_COM_INPROC)
129	/* share parent weakly */
130	unconst(mParent) = aParent;
131	#endif
132
133	#if !defined(VBOX_COM_INPROC)
134	/* assign (and therefore addref) initiator only if it is not VirtualBox
135	* (to avoid cycling); otherwise mInitiator will remain null which means
136	* that it is the same as the parent */
137	if (aInitiator)
138	{
139	ComObjPtr<VirtualBox> pVirtualBox(mParent);
140	if (!(pVirtualBox == aInitiator))
141	unconst(mInitiator) = aInitiator;
142	}
143	#else
144	unconst(mInitiator) = aInitiator;
145	#endif
146
147	unconst(mId).create();
148	if (aId)
149	mId.cloneTo(aId);
150
151	#if !defined(VBOX_COM_INPROC)
152	/* add to the global collection of progress operations (note: after
153	* creating mId) */
154	mParent->addProgress(this);
155	#endif
156
157	unconst(mDescription) = aDescription;
158
159	return S_OK;
160	}
161
162	/**
163	* Initializes the progress base object.
164	*
165	* This is a special initializer that doesn't initialize any field. Used by one
166	* of the Progress::init() forms to create sub-progress operations combined
167	* together using a CombinedProgress instance, so it doesn't require the parent,
168	* initiator, description and doesn't create an ID.
169	*
170	* Subclasses should call this or any other #protectedInit() method from their
171	* init() implementations.
172	*
173	* @param aAutoInitSpan AutoInitSpan object instantiated by a subclass.
174	*/
175	HRESULT ProgressBase::protectedInit(AutoInitSpan &aAutoInitSpan)
176	{
177	/* Guarantees subclasses call this method at the proper time */
178	NOREF(aAutoInitSpan);
179
180	return S_OK;
181	}
182
183	/**
184	* Uninitializes the instance.
185	*
186	* Subclasses should call this from their uninit() implementations.
187	*
188	* @param aAutoUninitSpan AutoUninitSpan object instantiated by a subclass.
189	*
190	* @note Using the mParent member after this method returns is forbidden.
191	*/
192	void ProgressBase::protectedUninit(AutoUninitSpan &aAutoUninitSpan)
193	{
194	/* release initiator (effective only if mInitiator has been assigned in
195	* init()) */
196	unconst(mInitiator).setNull();
197
198	#if !defined(VBOX_COM_INPROC)
199	if (mParent)
200	{
201	/* remove the added progress on failure to complete the initialization */
202	if (aAutoUninitSpan.initFailed() && !mId.isEmpty())
203	mParent->removeProgress(mId.ref());
204
205	unconst(mParent) = NULL;
206	}
207	#endif
208	}
209
210	// IProgress properties
211	/////////////////////////////////////////////////////////////////////////////
212
213	STDMETHODIMP ProgressBase::COMGETTER(Id)(BSTR *aId)
214	{
215	CheckComArgOutPointerValid(aId);
216
217	AutoCaller autoCaller(this);
218	if (FAILED(autoCaller.rc())) return autoCaller.rc();
219
220	/* mId is constant during life time, no need to lock */
221	mId.toUtf16().cloneTo(aId);
222
223	return S_OK;
224	}
225
226	STDMETHODIMP ProgressBase::COMGETTER(Description)(BSTR *aDescription)
227	{
228	CheckComArgOutPointerValid(aDescription);
229
230	AutoCaller autoCaller(this);
231	if (FAILED(autoCaller.rc())) return autoCaller.rc();
232
233	/* mDescription is constant during life time, no need to lock */
234	mDescription.cloneTo(aDescription);
235
236	return S_OK;
237	}
238
239	STDMETHODIMP ProgressBase::COMGETTER(Initiator)(IUnknown **aInitiator)
240	{
241	CheckComArgOutPointerValid(aInitiator);
242
243	AutoCaller autoCaller(this);
244	if (FAILED(autoCaller.rc())) return autoCaller.rc();
245
246	/* mInitiator/mParent are constant during life time, no need to lock */
247
248	#if !defined(VBOX_COM_INPROC)
249	if (mInitiator)
250	mInitiator.queryInterfaceTo(aInitiator);
251	else
252	{
253	ComObjPtr<VirtualBox> pVirtualBox(mParent);
254	pVirtualBox.queryInterfaceTo(aInitiator);
255	}
256	#else
257	mInitiator.queryInterfaceTo(aInitiator);
258	#endif
259
260	return S_OK;
261	}
262
263	STDMETHODIMP ProgressBase::COMGETTER(Cancelable)(BOOL *aCancelable)
264	{
265	CheckComArgOutPointerValid(aCancelable);
266
267	AutoCaller autoCaller(this);
268	if (FAILED(autoCaller.rc())) return autoCaller.rc();
269
270	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
271
272	*aCancelable = mCancelable;
273
274	return S_OK;
275	}
276
277	/**
278	* Internal helper to compute the total percent value based on the member values and
279	* returns it as a "double". This is used both by GetPercent (which returns it as a
280	* rounded ULONG) and GetTimeRemaining().
281	*
282	* Requires locking by the caller!
283	*
284	* @return fractional percentage as a double value.
285	*/
286	double ProgressBase::calcTotalPercent()
287	{
288	// avoid division by zero
289	if (m_ulTotalOperationsWeight == 0)
290	return 0;
291
292	double dPercent = ( (double)m_ulOperationsCompletedWeight // weight of operations that have been completed
293	+ ((double)m_ulOperationPercent * (double)m_ulCurrentOperationWeight / (double)100) // plus partial weight of the current operation
294	) * (double)100 / (double)m_ulTotalOperationsWeight;
295
296	return dPercent;
297	}
298
299	/**
300	* Internal helper for automatically timing out the operation.
301	*
302	* The caller should hold the object write lock.
303	*/
304	void ProgressBase::checkForAutomaticTimeout(void)
305	{
306	if ( m_cMsTimeout
307	&& mCancelable
308	&& !mCanceled
309	&& RTTimeMilliTS() - m_ullTimestamp > m_cMsTimeout
310	)
311	Cancel();
312	}
313
314
315	STDMETHODIMP ProgressBase::COMGETTER(TimeRemaining)(LONG *aTimeRemaining)
316	{
317	CheckComArgOutPointerValid(aTimeRemaining);
318
319	AutoCaller autoCaller(this);
320	if (FAILED(autoCaller.rc())) return autoCaller.rc();
321
322	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
323
324	if (mCompleted)
325	*aTimeRemaining = 0;
326	else
327	{
328	double dPercentDone = calcTotalPercent();
329	if (dPercentDone < 1)
330	*aTimeRemaining = -1; // unreliable, or avoid division by 0 below
331	else
332	{
333	uint64_t ullTimeNow = RTTimeMilliTS();
334	uint64_t ullTimeElapsed = ullTimeNow - m_ullTimestamp;
335	uint64_t ullTimeTotal = (uint64_t)(ullTimeElapsed * 100 / dPercentDone);
336	uint64_t ullTimeRemaining = ullTimeTotal - ullTimeElapsed;
337
338	// Log(("ProgressBase::GetTimeRemaining: dPercentDone %RI32, ullTimeNow = %RI64, ullTimeElapsed = %RI64, ullTimeTotal = %RI64, ullTimeRemaining = %RI64\n",
339	// (uint32_t)dPercentDone, ullTimeNow, ullTimeElapsed, ullTimeTotal, ullTimeRemaining));
340
341	*aTimeRemaining = (LONG)(ullTimeRemaining / 1000);
342	}
343	}
344
345	return S_OK;
346	}
347
348	STDMETHODIMP ProgressBase::COMGETTER(Percent)(ULONG *aPercent)
349	{
350	CheckComArgOutPointerValid(aPercent);
351
352	AutoCaller autoCaller(this);
353	if (FAILED(autoCaller.rc())) return autoCaller.rc();
354
355	checkForAutomaticTimeout();
356
357	/* checkForAutomaticTimeout requires a write lock. */
358	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
359
360	if (mCompleted && SUCCEEDED(mResultCode))
361	*aPercent = 100;
362	else
363	{
364	ULONG ulPercent = (ULONG)calcTotalPercent();
365	// do not report 100% until we're really really done with everything as the Qt GUI dismisses progress dialogs in that case
366	if ( ulPercent == 100
367	&& ( m_ulOperationPercent < 100
368	\|\| (m_ulCurrentOperation < m_cOperations -1)
369	)
370	)
371	*aPercent = 99;
372	else
373	*aPercent = ulPercent;
374	}
375
376	checkForAutomaticTimeout();
377
378	return S_OK;
379	}
380
381	STDMETHODIMP ProgressBase::COMGETTER(Completed)(BOOL *aCompleted)
382	{
383	CheckComArgOutPointerValid(aCompleted);
384
385	AutoCaller autoCaller(this);
386	if (FAILED(autoCaller.rc())) return autoCaller.rc();
387
388	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
389
390	*aCompleted = mCompleted;
391
392	return S_OK;
393	}
394
395	STDMETHODIMP ProgressBase::COMGETTER(Canceled)(BOOL *aCanceled)
396	{
397	CheckComArgOutPointerValid(aCanceled);
398
399	AutoCaller autoCaller(this);
400	if (FAILED(autoCaller.rc())) return autoCaller.rc();
401
402	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
403
404	*aCanceled = mCanceled;
405
406	return S_OK;
407	}
408
409	STDMETHODIMP ProgressBase::COMGETTER(ResultCode)(LONG *aResultCode)
410	{
411	CheckComArgOutPointerValid(aResultCode);
412
413	AutoCaller autoCaller(this);
414	if (FAILED(autoCaller.rc())) return autoCaller.rc();
415
416	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
417
418	if (!mCompleted)
419	return setError(E_FAIL,
420	tr("Result code is not available, operation is still in progress"));
421
422	*aResultCode = mResultCode;
423
424	return S_OK;
425	}
426
427	STDMETHODIMP ProgressBase::COMGETTER(ErrorInfo)(IVirtualBoxErrorInfo **aErrorInfo)
428	{
429	CheckComArgOutPointerValid(aErrorInfo);
430
431	AutoCaller autoCaller(this);
432	if (FAILED(autoCaller.rc())) return autoCaller.rc();
433
434	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
435
436	if (!mCompleted)
437	return setError(E_FAIL,
438	tr("Error info is not available, operation is still in progress"));
439
440	mErrorInfo.queryInterfaceTo(aErrorInfo);
441
442	return S_OK;
443	}
444
445	STDMETHODIMP ProgressBase::COMGETTER(OperationCount)(ULONG *aOperationCount)
446	{
447	CheckComArgOutPointerValid(aOperationCount);
448
449	AutoCaller autoCaller(this);
450	if (FAILED(autoCaller.rc())) return autoCaller.rc();
451
452	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
453
454	*aOperationCount = m_cOperations;
455
456	return S_OK;
457	}
458
459	STDMETHODIMP ProgressBase::COMGETTER(Operation)(ULONG *aOperation)
460	{
461	CheckComArgOutPointerValid(aOperation);
462
463	AutoCaller autoCaller(this);
464	if (FAILED(autoCaller.rc())) return autoCaller.rc();
465
466	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
467
468	*aOperation = m_ulCurrentOperation;
469
470	return S_OK;
471	}
472
473	STDMETHODIMP ProgressBase::COMGETTER(OperationDescription)(BSTR *aOperationDescription)
474	{
475	CheckComArgOutPointerValid(aOperationDescription);
476
477	AutoCaller autoCaller(this);
478	if (FAILED(autoCaller.rc())) return autoCaller.rc();
479
480	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
481
482	m_bstrOperationDescription.cloneTo(aOperationDescription);
483
484	return S_OK;
485	}
486
487	STDMETHODIMP ProgressBase::COMGETTER(OperationPercent)(ULONG *aOperationPercent)
488	{
489	CheckComArgOutPointerValid(aOperationPercent);
490
491	AutoCaller autoCaller(this);
492	if (FAILED(autoCaller.rc())) return autoCaller.rc();
493
494	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
495
496	if (mCompleted && SUCCEEDED(mResultCode))
497	*aOperationPercent = 100;
498	else
499	*aOperationPercent = m_ulOperationPercent;
500
501	return S_OK;
502	}
503
504	STDMETHODIMP ProgressBase::COMGETTER(OperationWeight)(ULONG *aOperationWeight)
505	{
506	CheckComArgOutPointerValid(aOperationWeight);
507
508	AutoCaller autoCaller(this);
509	if (FAILED(autoCaller.rc())) return autoCaller.rc();
510
511	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
512
513	*aOperationWeight = m_ulCurrentOperationWeight;
514
515	return S_OK;
516	}
517
518	STDMETHODIMP ProgressBase::COMSETTER(Timeout)(ULONG aTimeout)
519	{
520	AutoCaller autoCaller(this);
521	if (FAILED(autoCaller.rc())) return autoCaller.rc();
522
523	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
524
525	if (!mCancelable)
526	return setError(VBOX_E_INVALID_OBJECT_STATE,
527	tr("Operation cannot be canceled"));
528
529	LogThisFunc(("%#x => %#x\n", m_cMsTimeout, aTimeout));
530	m_cMsTimeout = aTimeout;
531	return S_OK;
532	}
533
534	STDMETHODIMP ProgressBase::COMGETTER(Timeout)(ULONG *aTimeout)
535	{
536	CheckComArgOutPointerValid(aTimeout);
537
538	AutoCaller autoCaller(this);
539	if (FAILED(autoCaller.rc())) return autoCaller.rc();
540
541	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
542
543	*aTimeout = m_cMsTimeout;
544	return S_OK;
545	}
546
547	// public methods only for internal purposes
548	////////////////////////////////////////////////////////////////////////////////
549
550	/**
551	* Sets the cancelation callback, checking for cancelation first.
552	*
553	* @returns Success indicator.
554	* @retval true on success.
555	* @retval false if the progress object has already been canceled or is in an
556	* invalid state
557	*
558	* @param pfnCallback The function to be called upon cancelation.
559	* @param pvUser The callback argument.
560	*/
561	bool ProgressBase::setCancelCallback(void (pfnCallback)(void ), void *pvUser)
562	{
563	AutoCaller autoCaller(this);
564	AssertComRCReturn(autoCaller.rc(), false);
565
566	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
567
568	checkForAutomaticTimeout();
569	if (mCanceled)
570	return false;
571
572	m_pvCancelUserArg = pvUser;
573	m_pfnCancelCallback = pfnCallback;
574	return true;
575	}
576
577	////////////////////////////////////////////////////////////////////////////////
578	// Progress class
579	////////////////////////////////////////////////////////////////////////////////
580
581	HRESULT Progress::FinalConstruct()
582	{
583	HRESULT rc = ProgressBase::FinalConstruct();
584	if (FAILED(rc)) return rc;
585
586	mCompletedSem = NIL_RTSEMEVENTMULTI;
587	mWaitersCount = 0;
588
589	return S_OK;
590	}
591
592	void Progress::FinalRelease()
593	{
594	uninit();
595	BaseFinalRelease();
596	}
597
598	// public initializer/uninitializer for internal purposes only
599	////////////////////////////////////////////////////////////////////////////////
600
601	/**
602	* Initializes the normal progress object. With this variant, one can have
603	* an arbitrary number of sub-operation which IProgress can analyze to
604	* have a weighted progress computed.
605	*
606	* For example, say that one IProgress is supposed to track the cloning
607	* of two hard disk images, which are 100 MB and 1000 MB in size, respectively,
608	* and each of these hard disks should be one sub-operation of the IProgress.
609	*
610	* Obviously the progress would be misleading if the progress displayed 50%
611	* after the smaller image was cloned and would then take much longer for
612	* the second half.
613	*
614	* With weighted progress, one can invoke the following calls:
615	*
616	* 1) create progress object with cOperations = 2 and ulTotalOperationsWeight =
617	* 1100 (100 MB plus 1100, but really the weights can be any ULONG); pass
618	* in ulFirstOperationWeight = 100 for the first sub-operation
619	*
620	* 2) Then keep calling setCurrentOperationProgress() with a percentage
621	* for the first image; the total progress will increase up to a value
622	* of 9% (100MB / 1100MB * 100%).
623	*
624	* 3) Then call setNextOperation with the second weight (1000 for the megabytes
625	* of the second disk).
626	*
627	* 4) Then keep calling setCurrentOperationProgress() with a percentage for
628	* the second image, where 100% of the operation will then yield a 100%
629	* progress of the entire task.
630	*
631	* Weighting is optional; you can simply assign a weight of 1 to each operation
632	* and pass ulTotalOperationsWeight == cOperations to this constructor (but
633	* for that variant and for backwards-compatibility a simpler constructor exists
634	* in ProgressImpl.h as well).
635	*
636	* Even simpler, if you need no sub-operations at all, pass in cOperations =
637	* ulTotalOperationsWeight = ulFirstOperationWeight = 1.
638	*
639	* @param aParent See ProgressBase::init().
640	* @param aInitiator See ProgressBase::init().
641	* @param aDescription See ProgressBase::init().
642	* @param aCancelable Flag whether the task maybe canceled.
643	* @param cOperations Number of operations within this task (at least 1).
644	* @param ulTotalOperationsWeight Total weight of operations; must be the sum of ulFirstOperationWeight and
645	* what is later passed with each subsequent setNextOperation() call.
646	* @param bstrFirstOperationDescription Description of the first operation.
647	* @param ulFirstOperationWeight Weight of first sub-operation.
648	* @param aId See ProgressBase::init().
649	*/
650	HRESULT Progress::init(
651	#if !defined(VBOX_COM_INPROC)
652	VirtualBox *aParent,
653	#endif
654	IUnknown *aInitiator,
655	CBSTR aDescription,
656	BOOL aCancelable,
657	ULONG cOperations,
658	ULONG ulTotalOperationsWeight,
659	CBSTR bstrFirstOperationDescription,
660	ULONG ulFirstOperationWeight,
661	OUT_GUID aId /* = NULL */)
662	{
663	LogFlowThisFunc(("aDescription=\"%ls\", cOperations=%d, ulTotalOperationsWeight=%d, bstrFirstOperationDescription=\"%ls\", ulFirstOperationWeight=%d\n",
664	aDescription,
665	cOperations,
666	ulTotalOperationsWeight,
667	bstrFirstOperationDescription,
668	ulFirstOperationWeight));
669
670	AssertReturn(bstrFirstOperationDescription, E_INVALIDARG);
671	AssertReturn(ulTotalOperationsWeight >= 1, E_INVALIDARG);
672
673	/* Enclose the state transition NotReady->InInit->Ready */
674	AutoInitSpan autoInitSpan(this);
675	AssertReturn(autoInitSpan.isOk(), E_FAIL);
676
677	HRESULT rc = S_OK;
678
679	rc = ProgressBase::protectedInit(autoInitSpan,
680	#if !defined(VBOX_COM_INPROC)
681	aParent,
682	#endif
683	aInitiator, aDescription, aId);
684	if (FAILED(rc)) return rc;
685
686	mCancelable = aCancelable;
687
688	m_cOperations = cOperations;
689	m_ulTotalOperationsWeight = ulTotalOperationsWeight;
690	m_ulOperationsCompletedWeight = 0;
691	m_ulCurrentOperation = 0;
692	m_bstrOperationDescription = bstrFirstOperationDescription;
693	m_ulCurrentOperationWeight = ulFirstOperationWeight;
694	m_ulOperationPercent = 0;
695
696	int vrc = RTSemEventMultiCreate(&mCompletedSem);
697	ComAssertRCRet(vrc, E_FAIL);
698
699	RTSemEventMultiReset(mCompletedSem);
700
701	/* Confirm a successful initialization when it's the case */
702	if (SUCCEEDED(rc))
703	autoInitSpan.setSucceeded();
704
705	return rc;
706	}
707
708	/**
709	* Initializes the sub-progress object that represents a specific operation of
710	* the whole task.
711	*
712	* Objects initialized with this method are then combined together into the
713	* single task using a CombinedProgress instance, so it doesn't require the
714	* parent, initiator, description and doesn't create an ID. Note that calling
715	* respective getter methods on an object initialized with this method is
716	* useless. Such objects are used only to provide a separate wait semaphore and
717	* store individual operation descriptions.
718	*
719	* @param aCancelable Flag whether the task maybe canceled.
720	* @param aOperationCount Number of sub-operations within this task (at least 1).
721	* @param aOperationDescription Description of the individual operation.
722	*/
723	HRESULT Progress::init(BOOL aCancelable,
724	ULONG aOperationCount,
725	CBSTR aOperationDescription)
726	{
727	LogFlowThisFunc(("aOperationDescription=\"%ls\"\n", aOperationDescription));
728
729	/* Enclose the state transition NotReady->InInit->Ready */
730	AutoInitSpan autoInitSpan(this);
731	AssertReturn(autoInitSpan.isOk(), E_FAIL);
732
733	HRESULT rc = S_OK;
734
735	rc = ProgressBase::protectedInit(autoInitSpan);
736	if (FAILED(rc)) return rc;
737
738	mCancelable = aCancelable;
739
740	// for this variant we assume for now that all operations are weighed "1"
741	// and equal total weight = operation count
742	m_cOperations = aOperationCount;
743	m_ulTotalOperationsWeight = aOperationCount;
744	m_ulOperationsCompletedWeight = 0;
745	m_ulCurrentOperation = 0;
746	m_bstrOperationDescription = aOperationDescription;
747	m_ulCurrentOperationWeight = 1;
748	m_ulOperationPercent = 0;
749
750	int vrc = RTSemEventMultiCreate(&mCompletedSem);
751	ComAssertRCRet(vrc, E_FAIL);
752
753	RTSemEventMultiReset(mCompletedSem);
754
755	/* Confirm a successful initialization when it's the case */
756	if (SUCCEEDED(rc))
757	autoInitSpan.setSucceeded();
758
759	return rc;
760	}
761
762	/**
763	* Uninitializes the instance and sets the ready flag to FALSE.
764	*
765	* Called either from FinalRelease() or by the parent when it gets destroyed.
766	*/
767	void Progress::uninit()
768	{
769	LogFlowThisFunc(("\n"));
770
771	/* Enclose the state transition Ready->InUninit->NotReady */
772	AutoUninitSpan autoUninitSpan(this);
773	if (autoUninitSpan.uninitDone())
774	return;
775
776	/* wake up all threads still waiting on occasion */
777	if (mWaitersCount > 0)
778	{
779	LogFlow(("WARNING: There are still %d threads waiting for '%ls' completion!\n",
780	mWaitersCount, mDescription.raw()));
781	RTSemEventMultiSignal(mCompletedSem);
782	}
783
784	RTSemEventMultiDestroy(mCompletedSem);
785
786	ProgressBase::protectedUninit(autoUninitSpan);
787	}
788
789	// IProgress properties
790	/////////////////////////////////////////////////////////////////////////////
791
792	// IProgress methods
793	/////////////////////////////////////////////////////////////////////////////
794
795	/**
796	* @note XPCOM: when this method is not called on the main XPCOM thread, it
797	* simply blocks the thread until mCompletedSem is signalled. If the
798	* thread has its own event queue (hmm, what for?) that it must run, then
799	* calling this method will definitely freeze event processing.
800	*/
801	STDMETHODIMP Progress::WaitForCompletion(LONG aTimeout)
802	{
803	LogFlowThisFuncEnter();
804	LogFlowThisFunc(("aTimeout=%d\n", aTimeout));
805
806	AutoCaller autoCaller(this);
807	if (FAILED(autoCaller.rc())) return autoCaller.rc();
808
809	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
810
811	/* if we're already completed, take a shortcut */
812	if (!mCompleted)
813	{
814	int vrc = VINF_SUCCESS;
815	bool fForever = aTimeout < 0;
816	int64_t timeLeft = aTimeout;
817	int64_t lastTime = RTTimeMilliTS();
818
819	while (!mCompleted && (fForever \|\| timeLeft > 0))
820	{
821	mWaitersCount++;
822	alock.release();
823	vrc = RTSemEventMultiWait(mCompletedSem,
824	fForever ? RT_INDEFINITE_WAIT : (RTMSINTERVAL)timeLeft);
825	alock.acquire();
826	mWaitersCount--;
827
828	/* the last waiter resets the semaphore */
829	if (mWaitersCount == 0)
830	RTSemEventMultiReset(mCompletedSem);
831
832	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
833	break;
834
835	if (!fForever)
836	{
837	int64_t now = RTTimeMilliTS();
838	timeLeft -= now - lastTime;
839	lastTime = now;
840	}
841	}
842
843	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
844	return setError(VBOX_E_IPRT_ERROR,
845	tr("Failed to wait for the task completion (%Rrc)"),
846	vrc);
847	}
848
849	LogFlowThisFuncLeave();
850
851	return S_OK;
852	}
853
854	/**
855	* @note XPCOM: when this method is not called on the main XPCOM thread, it
856	* simply blocks the thread until mCompletedSem is signalled. If the
857	* thread has its own event queue (hmm, what for?) that it must run, then
858	* calling this method will definitely freeze event processing.
859	*/
860	STDMETHODIMP Progress::WaitForOperationCompletion(ULONG aOperation, LONG aTimeout)
861	{
862	LogFlowThisFuncEnter();
863	LogFlowThisFunc(("aOperation=%d, aTimeout=%d\n", aOperation, aTimeout));
864
865	AutoCaller autoCaller(this);
866	if (FAILED(autoCaller.rc())) return autoCaller.rc();
867
868	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
869
870	CheckComArgExpr(aOperation, aOperation < m_cOperations);
871
872	/* if we're already completed or if the given operation is already done,
873	* then take a shortcut */
874	if ( !mCompleted
875	&& aOperation >= m_ulCurrentOperation)
876	{
877	int vrc = VINF_SUCCESS;
878	bool fForever = aTimeout < 0;
879	int64_t timeLeft = aTimeout;
880	int64_t lastTime = RTTimeMilliTS();
881
882	while ( !mCompleted && aOperation >= m_ulCurrentOperation
883	&& (fForever \|\| timeLeft > 0))
884	{
885	mWaitersCount ++;
886	alock.release();
887	vrc = RTSemEventMultiWait(mCompletedSem,
888	fForever ? RT_INDEFINITE_WAIT : (unsigned) timeLeft);
889	alock.acquire();
890	mWaitersCount--;
891
892	/* the last waiter resets the semaphore */
893	if (mWaitersCount == 0)
894	RTSemEventMultiReset(mCompletedSem);
895
896	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
897	break;
898
899	if (!fForever)
900	{
901	int64_t now = RTTimeMilliTS();
902	timeLeft -= now - lastTime;
903	lastTime = now;
904	}
905	}
906
907	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
908	return setError(E_FAIL,
909	tr("Failed to wait for the operation completion (%Rrc)"),
910	vrc);
911	}
912
913	LogFlowThisFuncLeave();
914
915	return S_OK;
916	}
917
918	STDMETHODIMP Progress::WaitForAsyncProgressCompletion(IProgress *pProgressAsync)
919	{
920	LogFlowThisFuncEnter();
921
922	CheckComArgNotNull(pProgressAsync);
923
924	AutoCaller autoCaller(this);
925	if (FAILED(autoCaller.rc())) return autoCaller.rc();
926
927	/* Note: we don't lock here, cause we just using public methods. */
928
929	HRESULT rc = S_OK;
930	BOOL fCancelable = FALSE;
931	BOOL fCompleted = FALSE;
932	BOOL fCanceled = FALSE;
933	ULONG prevPercent = UINT32_MAX;
934	ULONG currentPercent = 0;
935	ULONG cOp = 0;
936	/* Is the async process cancelable? */
937	rc = pProgressAsync->COMGETTER(Cancelable)(&fCancelable);
938	if (FAILED(rc)) return rc;
939	/* Loop as long as the sync process isn't completed. */
940	while (SUCCEEDED(pProgressAsync->COMGETTER(Completed(&fCompleted))))
941	{
942	/* We can forward any cancel request to the async process only when
943	* it is cancelable. */
944	if (fCancelable)
945	{
946	rc = COMGETTER(Canceled)(&fCanceled);
947	if (FAILED(rc)) return rc;
948	if (fCanceled)
949	{
950	rc = pProgressAsync->Cancel();
951	if (FAILED(rc)) return rc;
952	}
953	}
954	/* Even if the user canceled the process, we have to wait until the
955	async task has finished his work (cleanup and such). Otherwise there
956	will be sync trouble (still wrong state, dead locks, ...) on the
957	used objects. So just do nothing, but wait for the complete
958	notification. */
959	if (!fCanceled)
960	{
961	/* Check if the current operation has changed. It is also possible that
962	* in the meantime more than one async operation was finished. So we
963	* have to loop as long as we reached the same operation count. */
964	ULONG curOp;
965	for(;;)
966	{
967	rc = pProgressAsync->COMGETTER(Operation(&curOp));
968	if (FAILED(rc)) return rc;
969	if (cOp != curOp)
970	{
971	Bstr bstr;
972	ULONG currentWeight;
973	rc = pProgressAsync->COMGETTER(OperationDescription(bstr.asOutParam()));
974	if (FAILED(rc)) return rc;
975	rc = pProgressAsync->COMGETTER(OperationWeight(&currentWeight));
976	if (FAILED(rc)) return rc;
977	rc = SetNextOperation(bstr.raw(), currentWeight);
978	if (FAILED(rc)) return rc;
979	++cOp;
980	}
981	else
982	break;
983	}
984
985	rc = pProgressAsync->COMGETTER(OperationPercent(&currentPercent));
986	if (FAILED(rc)) return rc;
987	if (currentPercent != prevPercent)
988	{
989	prevPercent = currentPercent;
990	rc = SetCurrentOperationProgress(currentPercent);
991	if (FAILED(rc)) return rc;
992	}
993	}
994	if (fCompleted)
995	break;
996
997	/* Make sure the loop is not too tight */
998	rc = pProgressAsync->WaitForCompletion(100);
999	if (FAILED(rc)) return rc;
1000	}
1001
1002	LogFlowThisFuncLeave();
1003
1004	return rc;
1005	}
1006
1007	STDMETHODIMP Progress::Cancel()
1008	{
1009	AutoCaller autoCaller(this);
1010	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1011
1012	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1013
1014	if (!mCancelable)
1015	return setError(VBOX_E_INVALID_OBJECT_STATE,
1016	tr("Operation cannot be canceled"));
1017
1018	if (!mCanceled)
1019	{
1020	LogThisFunc(("Canceling\n"));
1021	mCanceled = TRUE;
1022	if (m_pfnCancelCallback)
1023	m_pfnCancelCallback(m_pvCancelUserArg);
1024
1025	}
1026	else
1027	LogThisFunc(("Already canceled\n"));
1028
1029	return S_OK;
1030	}
1031
1032	/**
1033	* Updates the percentage value of the current operation.
1034	*
1035	* @param aPercent New percentage value of the operation in progress
1036	* (in range [0, 100]).
1037	*/
1038	STDMETHODIMP Progress::SetCurrentOperationProgress(ULONG aPercent)
1039	{
1040	AutoCaller autoCaller(this);
1041	AssertComRCReturnRC(autoCaller.rc());
1042
1043	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1044
1045	AssertMsgReturn(aPercent <= 100, ("%u\n", aPercent), E_INVALIDARG);
1046
1047	checkForAutomaticTimeout();
1048	if (mCancelable && mCanceled)
1049	{
1050	Assert(!mCompleted);
1051	return E_FAIL;
1052	}
1053	AssertReturn(!mCompleted && !mCanceled, E_FAIL);
1054
1055	m_ulOperationPercent = aPercent;
1056
1057	return S_OK;
1058	}
1059
1060	/**
1061	* Signals that the current operation is successfully completed and advances to
1062	* the next operation. The operation percentage is reset to 0.
1063	*
1064	* @param aOperationDescription Description of the next operation.
1065	*
1066	* @note The current operation must not be the last one.
1067	*/
1068	STDMETHODIMP Progress::SetNextOperation(IN_BSTR bstrNextOperationDescription, ULONG ulNextOperationsWeight)
1069	{
1070	AssertReturn(bstrNextOperationDescription, E_INVALIDARG);
1071
1072	AutoCaller autoCaller(this);
1073	AssertComRCReturnRC(autoCaller.rc());
1074
1075	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1076
1077	if (mCanceled)
1078	return E_FAIL;
1079	AssertReturn(!mCompleted, E_FAIL);
1080	AssertReturn(m_ulCurrentOperation + 1 < m_cOperations, E_FAIL);
1081
1082	++m_ulCurrentOperation;
1083	m_ulOperationsCompletedWeight += m_ulCurrentOperationWeight;
1084
1085	m_bstrOperationDescription = bstrNextOperationDescription;
1086	m_ulCurrentOperationWeight = ulNextOperationsWeight;
1087	m_ulOperationPercent = 0;
1088
1089	Log(("Progress::setNextOperation(%ls): ulNextOperationsWeight = %d; m_ulCurrentOperation is now %d, m_ulOperationsCompletedWeight is now %d\n",
1090	m_bstrOperationDescription.raw(), ulNextOperationsWeight, m_ulCurrentOperation, m_ulOperationsCompletedWeight));
1091
1092	/* wake up all waiting threads */
1093	if (mWaitersCount > 0)
1094	RTSemEventMultiSignal(mCompletedSem);
1095
1096	return S_OK;
1097	}
1098
1099	// public methods only for internal purposes
1100	/////////////////////////////////////////////////////////////////////////////
1101
1102	/**
1103	* Sets the internal result code and attempts to retrieve additional error
1104	* info from the current thread. Gets called from Progress::notifyComplete(),
1105	* but can be called again to override a previous result set with
1106	* notifyComplete().
1107	*
1108	* @param aResultCode
1109	*/
1110	HRESULT Progress::setResultCode(HRESULT aResultCode)
1111	{
1112	AutoCaller autoCaller(this);
1113	AssertComRCReturnRC(autoCaller.rc());
1114
1115	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1116
1117	mResultCode = aResultCode;
1118
1119	HRESULT rc = S_OK;
1120
1121	if (FAILED(aResultCode))
1122	{
1123	/* try to import error info from the current thread */
1124
1125	#if !defined(VBOX_WITH_XPCOM)
1126
1127	ComPtr<IErrorInfo> err;
1128	rc = ::GetErrorInfo(0, err.asOutParam());
1129	if (rc == S_OK && err)
1130	{
1131	rc = err.queryInterfaceTo(mErrorInfo.asOutParam());
1132	if (SUCCEEDED(rc) && !mErrorInfo)
1133	rc = E_FAIL;
1134	}
1135
1136	#else /* !defined(VBOX_WITH_XPCOM) */
1137
1138	nsCOMPtr<nsIExceptionService> es;
1139	es = do_GetService(NS_EXCEPTIONSERVICE_CONTRACTID, &rc);
1140	if (NS_SUCCEEDED(rc))
1141	{
1142	nsCOMPtr <nsIExceptionManager> em;
1143	rc = es->GetCurrentExceptionManager(getter_AddRefs(em));
1144	if (NS_SUCCEEDED(rc))
1145	{
1146	ComPtr<nsIException> ex;
1147	rc = em->GetCurrentException(ex.asOutParam());
1148	if (NS_SUCCEEDED(rc) && ex)
1149	{
1150	rc = ex.queryInterfaceTo(mErrorInfo.asOutParam());
1151	if (NS_SUCCEEDED(rc) && !mErrorInfo)
1152	rc = E_FAIL;
1153	}
1154	}
1155	}
1156	#endif /* !defined(VBOX_WITH_XPCOM) */
1157
1158	AssertMsg(rc == S_OK, ("Couldn't get error info (rc=%08X) while trying to set a failed result (%08X)!\n",
1159	rc, aResultCode));
1160	}
1161
1162	return rc;
1163	}
1164
1165	/**
1166	* Marks the whole task as complete and sets the result code.
1167	*
1168	* If the result code indicates a failure (\|FAILED(@a aResultCode)\|) then this
1169	* method will import the error info from the current thread and assign it to
1170	* the errorInfo attribute (it will return an error if no info is available in
1171	* such case).
1172	*
1173	* If the result code indicates a success (\|SUCCEEDED(@a aResultCode)\|) then
1174	* the current operation is set to the last.
1175	*
1176	* Note that this method may be called only once for the given Progress object.
1177	* Subsequent calls will assert.
1178	*
1179	* @param aResultCode Operation result code.
1180	*/
1181	HRESULT Progress::notifyComplete(HRESULT aResultCode)
1182	{
1183	AutoCaller autoCaller(this);
1184	AssertComRCReturnRC(autoCaller.rc());
1185
1186	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1187
1188	AssertReturn(mCompleted == FALSE, E_FAIL);
1189
1190	LogFunc(("aResultCode=%d\n", aResultCode));
1191
1192	if (mCanceled && SUCCEEDED(aResultCode))
1193	aResultCode = E_FAIL;
1194
1195	HRESULT rc = setResultCode(aResultCode);
1196
1197	mCompleted = TRUE;
1198
1199	if (!FAILED(aResultCode))
1200	{
1201	m_ulCurrentOperation = m_cOperations - 1; /* last operation */
1202	m_ulOperationPercent = 100;
1203	}
1204
1205	#if !defined VBOX_COM_INPROC
1206	/* remove from the global collection of pending progress operations */
1207	if (mParent)
1208	mParent->removeProgress(mId.ref());
1209	#endif
1210
1211	/* wake up all waiting threads */
1212	if (mWaitersCount > 0)
1213	RTSemEventMultiSignal(mCompletedSem);
1214
1215	return rc;
1216	}
1217
1218	/**
1219	* Wrapper around Progress:notifyCompleteV.
1220	*/
1221	HRESULT Progress::notifyComplete(HRESULT aResultCode,
1222	const GUID &aIID,
1223	const char *pcszComponent,
1224	const char *aText,
1225	...)
1226	{
1227	va_list va;
1228	va_start(va, aText);
1229	HRESULT hrc = notifyCompleteV(aResultCode, aIID, pcszComponent, aText, va);
1230	va_end(va);
1231	return hrc;
1232	}
1233
1234	/**
1235	* Marks the operation as complete and attaches full error info.
1236	*
1237	* See com::SupportErrorInfoImpl::setError(HRESULT, const GUID &, const wchar_t
1238	* , const char , ...) for more info.
1239	*
1240	* @param aResultCode Operation result (error) code, must not be S_OK.
1241	* @param aIID IID of the interface that defines the error.
1242	* @param aComponent Name of the component that generates the error.
1243	* @param aText Error message (must not be null), an RTStrPrintf-like
1244	* format string in UTF-8 encoding.
1245	* @param va List of arguments for the format string.
1246	*/
1247	HRESULT Progress::notifyCompleteV(HRESULT aResultCode,
1248	const GUID &aIID,
1249	const char *pcszComponent,
1250	const char *aText,
1251	va_list va)
1252	{
1253	Utf8Str text(aText, va);
1254
1255	AutoCaller autoCaller(this);
1256	AssertComRCReturnRC(autoCaller.rc());
1257
1258	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1259
1260	AssertReturn(mCompleted == FALSE, E_FAIL);
1261
1262	if (mCanceled && SUCCEEDED(aResultCode))
1263	aResultCode = E_FAIL;
1264
1265	mCompleted = TRUE;
1266	mResultCode = aResultCode;
1267
1268	AssertReturn(FAILED(aResultCode), E_FAIL);
1269
1270	ComObjPtr<VirtualBoxErrorInfo> errorInfo;
1271	HRESULT rc = errorInfo.createObject();
1272	AssertComRC(rc);
1273	if (SUCCEEDED(rc))
1274	{
1275	errorInfo->init(aResultCode, aIID, pcszComponent, text);
1276	errorInfo.queryInterfaceTo(mErrorInfo.asOutParam());
1277	}
1278
1279	#if !defined VBOX_COM_INPROC
1280	/* remove from the global collection of pending progress operations */
1281	if (mParent)
1282	mParent->removeProgress(mId.ref());
1283	#endif
1284
1285	/* wake up all waiting threads */
1286	if (mWaitersCount > 0)
1287	RTSemEventMultiSignal(mCompletedSem);
1288
1289	return rc;
1290	}
1291
1292	/**
1293	* Notify the progress object that we're almost at the point of no return.
1294	*
1295	* This atomically checks for and disables cancelation. Calls to
1296	* IProgress::Cancel() made after a successful call to this method will fail
1297	* and the user can be told. While this isn't entirely clean behavior, it
1298	* prevents issues with an irreversible actually operation succeeding while the
1299	* user believe it was rolled back.
1300	*
1301	* @returns Success indicator.
1302	* @retval true on success.
1303	* @retval false if the progress object has already been canceled or is in an
1304	* invalid state
1305	*/
1306	bool Progress::notifyPointOfNoReturn(void)
1307	{
1308	AutoCaller autoCaller(this);
1309	AssertComRCReturn(autoCaller.rc(), false);
1310
1311	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1312
1313	if (mCanceled)
1314	{
1315	LogThisFunc(("returns false\n"));
1316	return false;
1317	}
1318
1319	mCancelable = FALSE;
1320	LogThisFunc(("returns true\n"));
1321	return true;
1322	}
1323
1324	////////////////////////////////////////////////////////////////////////////////
1325	// CombinedProgress class
1326	////////////////////////////////////////////////////////////////////////////////
1327
1328	HRESULT CombinedProgress::FinalConstruct()
1329	{
1330	HRESULT rc = ProgressBase::FinalConstruct();
1331	if (FAILED(rc)) return rc;
1332
1333	mProgress = 0;
1334	mCompletedOperations = 0;
1335
1336	return BaseFinalConstruct();
1337	}
1338
1339	void CombinedProgress::FinalRelease()
1340	{
1341	uninit();
1342	BaseFinalRelease();
1343	}
1344
1345	// public initializer/uninitializer for internal purposes only
1346	////////////////////////////////////////////////////////////////////////////////
1347
1348	/**
1349	* Initializes this object based on individual combined progresses.
1350	* Must be called only from #init()!
1351	*
1352	* @param aAutoInitSpan AutoInitSpan object instantiated by a subclass.
1353	* @param aParent See ProgressBase::init().
1354	* @param aInitiator See ProgressBase::init().
1355	* @param aDescription See ProgressBase::init().
1356	* @param aId See ProgressBase::init().
1357	*/
1358	HRESULT CombinedProgress::protectedInit(AutoInitSpan &aAutoInitSpan,
1359	#if !defined(VBOX_COM_INPROC)
1360	VirtualBox *aParent,
1361	#endif
1362	IUnknown *aInitiator,
1363	CBSTR aDescription, OUT_GUID aId)
1364	{
1365	LogFlowThisFunc(("aDescription={%ls} mProgresses.size()=%d\n",
1366	aDescription, mProgresses.size()));
1367
1368	HRESULT rc = S_OK;
1369
1370	rc = ProgressBase::protectedInit(aAutoInitSpan,
1371	#if !defined(VBOX_COM_INPROC)
1372	aParent,
1373	#endif
1374	aInitiator, aDescription, aId);
1375	if (FAILED(rc)) return rc;
1376
1377	mProgress = 0; /* the first object */
1378	mCompletedOperations = 0;
1379
1380	mCompleted = FALSE;
1381	mCancelable = TRUE; /* until any progress returns FALSE */
1382	mCanceled = FALSE;
1383
1384	m_cOperations = 0; /* will be calculated later */
1385
1386	m_ulCurrentOperation = 0;
1387	rc = mProgresses[0]->COMGETTER(OperationDescription)(m_bstrOperationDescription.asOutParam());
1388	if (FAILED(rc)) return rc;
1389
1390	for (size_t i = 0; i < mProgresses.size(); i ++)
1391	{
1392	if (mCancelable)
1393	{
1394	BOOL cancelable = FALSE;
1395	rc = mProgresses[i]->COMGETTER(Cancelable)(&cancelable);
1396	if (FAILED(rc)) return rc;
1397
1398	if (!cancelable)
1399	mCancelable = FALSE;
1400	}
1401
1402	{
1403	ULONG opCount = 0;
1404	rc = mProgresses[i]->COMGETTER(OperationCount)(&opCount);
1405	if (FAILED(rc)) return rc;
1406
1407	m_cOperations += opCount;
1408	}
1409	}
1410
1411	rc = checkProgress();
1412	if (FAILED(rc)) return rc;
1413
1414	return rc;
1415	}
1416
1417	/**
1418	* Initializes the combined progress object given two normal progress
1419	* objects.
1420	*
1421	* @param aParent See ProgressBase::init().
1422	* @param aInitiator See ProgressBase::init().
1423	* @param aDescription See ProgressBase::init().
1424	* @param aProgress1 First normal progress object.
1425	* @param aProgress2 Second normal progress object.
1426	* @param aId See ProgressBase::init().
1427	*/
1428	HRESULT CombinedProgress::init(
1429	#if !defined(VBOX_COM_INPROC)
1430	VirtualBox *aParent,
1431	#endif
1432	IUnknown *aInitiator,
1433	CBSTR aDescription,
1434	IProgress *aProgress1,
1435	IProgress *aProgress2,
1436	OUT_GUID aId /* = NULL */)
1437	{
1438	/* Enclose the state transition NotReady->InInit->Ready */
1439	AutoInitSpan autoInitSpan(this);
1440	AssertReturn(autoInitSpan.isOk(), E_FAIL);
1441
1442	mProgresses.resize(2);
1443	mProgresses[0] = aProgress1;
1444	mProgresses[1] = aProgress2;
1445
1446	HRESULT rc = protectedInit(autoInitSpan,
1447	#if !defined(VBOX_COM_INPROC)
1448	aParent,
1449	#endif
1450	aInitiator,
1451	aDescription,
1452	aId);
1453
1454	/* Confirm a successful initialization when it's the case */
1455	if (SUCCEEDED(rc))
1456	autoInitSpan.setSucceeded();
1457
1458	return rc;
1459	}
1460
1461	/**
1462	* Uninitializes the instance and sets the ready flag to FALSE.
1463	*
1464	* Called either from FinalRelease() or by the parent when it gets destroyed.
1465	*/
1466	void CombinedProgress::uninit()
1467	{
1468	LogFlowThisFunc(("\n"));
1469
1470	/* Enclose the state transition Ready->InUninit->NotReady */
1471	AutoUninitSpan autoUninitSpan(this);
1472	if (autoUninitSpan.uninitDone())
1473	return;
1474
1475	mProgress = 0;
1476	mProgresses.clear();
1477
1478	ProgressBase::protectedUninit(autoUninitSpan);
1479	}
1480
1481	// IProgress properties
1482	////////////////////////////////////////////////////////////////////////////////
1483
1484	STDMETHODIMP CombinedProgress::COMGETTER(Percent)(ULONG *aPercent)
1485	{
1486	CheckComArgOutPointerValid(aPercent);
1487
1488	AutoCaller autoCaller(this);
1489	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1490
1491	/* checkProgress needs a write lock */
1492	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1493
1494	if (mCompleted && SUCCEEDED(mResultCode))
1495	*aPercent = 100;
1496	else
1497	{
1498	HRESULT rc = checkProgress();
1499	if (FAILED(rc)) return rc;
1500
1501	/* global percent =
1502	* (100 / m_cOperations) * mOperation +
1503	* ((100 / m_cOperations) / 100) * m_ulOperationPercent */
1504	aPercent = (100 m_ulCurrentOperation + m_ulOperationPercent) / m_cOperations;
1505	}
1506
1507	return S_OK;
1508	}
1509
1510	STDMETHODIMP CombinedProgress::COMGETTER(Completed)(BOOL *aCompleted)
1511	{
1512	CheckComArgOutPointerValid(aCompleted);
1513
1514	AutoCaller autoCaller(this);
1515	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1516
1517	/* checkProgress needs a write lock */
1518	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1519
1520	HRESULT rc = checkProgress();
1521	if (FAILED(rc)) return rc;
1522
1523	return ProgressBase::COMGETTER(Completed)(aCompleted);
1524	}
1525
1526	STDMETHODIMP CombinedProgress::COMGETTER(Canceled)(BOOL *aCanceled)
1527	{
1528	CheckComArgOutPointerValid(aCanceled);
1529
1530	AutoCaller autoCaller(this);
1531	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1532
1533	/* checkProgress needs a write lock */
1534	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1535
1536	HRESULT rc = checkProgress();
1537	if (FAILED(rc)) return rc;
1538
1539	return ProgressBase::COMGETTER(Canceled)(aCanceled);
1540	}
1541
1542	STDMETHODIMP CombinedProgress::COMGETTER(ResultCode)(LONG *aResultCode)
1543	{
1544	CheckComArgOutPointerValid(aResultCode);
1545
1546	AutoCaller autoCaller(this);
1547	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1548
1549	/* checkProgress needs a write lock */
1550	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1551
1552	HRESULT rc = checkProgress();
1553	if (FAILED(rc)) return rc;
1554
1555	return ProgressBase::COMGETTER(ResultCode)(aResultCode);
1556	}
1557
1558	STDMETHODIMP CombinedProgress::COMGETTER(ErrorInfo)(IVirtualBoxErrorInfo **aErrorInfo)
1559	{
1560	CheckComArgOutPointerValid(aErrorInfo);
1561
1562	AutoCaller autoCaller(this);
1563	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1564
1565	/* checkProgress needs a write lock */
1566	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1567
1568	HRESULT rc = checkProgress();
1569	if (FAILED(rc)) return rc;
1570
1571	return ProgressBase::COMGETTER(ErrorInfo)(aErrorInfo);
1572	}
1573
1574	STDMETHODIMP CombinedProgress::COMGETTER(Operation)(ULONG *aOperation)
1575	{
1576	CheckComArgOutPointerValid(aOperation);
1577
1578	AutoCaller autoCaller(this);
1579	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1580
1581	/* checkProgress needs a write lock */
1582	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1583
1584	HRESULT rc = checkProgress();
1585	if (FAILED(rc)) return rc;
1586
1587	return ProgressBase::COMGETTER(Operation)(aOperation);
1588	}
1589
1590	STDMETHODIMP CombinedProgress::COMGETTER(OperationDescription)(BSTR *aOperationDescription)
1591	{
1592	CheckComArgOutPointerValid(aOperationDescription);
1593
1594	AutoCaller autoCaller(this);
1595	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1596
1597	/* checkProgress needs a write lock */
1598	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1599
1600	HRESULT rc = checkProgress();
1601	if (FAILED(rc)) return rc;
1602
1603	return ProgressBase::COMGETTER(OperationDescription)(aOperationDescription);
1604	}
1605
1606	STDMETHODIMP CombinedProgress::COMGETTER(OperationPercent)(ULONG *aOperationPercent)
1607	{
1608	CheckComArgOutPointerValid(aOperationPercent);
1609
1610	AutoCaller autoCaller(this);
1611	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1612
1613	/* checkProgress needs a write lock */
1614	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1615
1616	HRESULT rc = checkProgress();
1617	if (FAILED(rc)) return rc;
1618
1619	return ProgressBase::COMGETTER(OperationPercent)(aOperationPercent);
1620	}
1621
1622	STDMETHODIMP CombinedProgress::COMSETTER(Timeout)(ULONG aTimeout)
1623	{
1624	NOREF(aTimeout);
1625	AssertFailed();
1626	return E_NOTIMPL;
1627	}
1628
1629	STDMETHODIMP CombinedProgress::COMGETTER(Timeout)(ULONG *aTimeout)
1630	{
1631	CheckComArgOutPointerValid(aTimeout);
1632
1633	AssertFailed();
1634	return E_NOTIMPL;
1635	}
1636
1637	// IProgress methods
1638	/////////////////////////////////////////////////////////////////////////////
1639
1640	/**
1641	* @note XPCOM: when this method is called not on the main XPCOM thread, it
1642	* simply blocks the thread until mCompletedSem is signalled. If the
1643	* thread has its own event queue (hmm, what for?) that it must run, then
1644	* calling this method will definitely freeze event processing.
1645	*/
1646	STDMETHODIMP CombinedProgress::WaitForCompletion(LONG aTimeout)
1647	{
1648	LogFlowThisFuncEnter();
1649	LogFlowThisFunc(("aTtimeout=%d\n", aTimeout));
1650
1651	AutoCaller autoCaller(this);
1652	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1653
1654	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1655
1656	/* if we're already completed, take a shortcut */
1657	if (!mCompleted)
1658	{
1659	HRESULT rc = S_OK;
1660	bool forever = aTimeout < 0;
1661	int64_t timeLeft = aTimeout;
1662	int64_t lastTime = RTTimeMilliTS();
1663
1664	while (!mCompleted && (forever \|\| timeLeft > 0))
1665	{
1666	alock.release();
1667	rc = mProgresses.back()->WaitForCompletion(forever ? -1 : (LONG) timeLeft);
1668	alock.acquire();
1669
1670	if (SUCCEEDED(rc))
1671	rc = checkProgress();
1672
1673	if (FAILED(rc)) break;
1674
1675	if (!forever)
1676	{
1677	int64_t now = RTTimeMilliTS();
1678	timeLeft -= now - lastTime;
1679	lastTime = now;
1680	}
1681	}
1682
1683	if (FAILED(rc)) return rc;
1684	}
1685
1686	LogFlowThisFuncLeave();
1687
1688	return S_OK;
1689	}
1690
1691	/**
1692	* @note XPCOM: when this method is called not on the main XPCOM thread, it
1693	* simply blocks the thread until mCompletedSem is signalled. If the
1694	* thread has its own event queue (hmm, what for?) that it must run, then
1695	* calling this method will definitely freeze event processing.
1696	*/
1697	STDMETHODIMP CombinedProgress::WaitForOperationCompletion(ULONG aOperation, LONG aTimeout)
1698	{
1699	LogFlowThisFuncEnter();
1700	LogFlowThisFunc(("aOperation=%d, aTimeout=%d\n", aOperation, aTimeout));
1701
1702	AutoCaller autoCaller(this);
1703	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1704
1705	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1706
1707	if (aOperation >= m_cOperations)
1708	return setError(E_FAIL,
1709	tr("Operation number must be in range [0, %d]"), m_ulCurrentOperation - 1);
1710
1711	/* if we're already completed or if the given operation is already done,
1712	* then take a shortcut */
1713	if (!mCompleted && aOperation >= m_ulCurrentOperation)
1714	{
1715	HRESULT rc = S_OK;
1716
1717	/* find the right progress object to wait for */
1718	size_t progress = mProgress;
1719	ULONG operation = 0, completedOps = mCompletedOperations;
1720	do
1721	{
1722	ULONG opCount = 0;
1723	rc = mProgresses[progress]->COMGETTER(OperationCount)(&opCount);
1724	if (FAILED(rc))
1725	return rc;
1726
1727	if (completedOps + opCount > aOperation)
1728	{
1729	/* found the right progress object */
1730	operation = aOperation - completedOps;
1731	break;
1732	}
1733
1734	completedOps += opCount;
1735	progress ++;
1736	ComAssertRet(progress < mProgresses.size(), E_FAIL);
1737	}
1738	while (1);
1739
1740	LogFlowThisFunc(("will wait for mProgresses [%d] (%d)\n",
1741	progress, operation));
1742
1743	bool forever = aTimeout < 0;
1744	int64_t timeLeft = aTimeout;
1745	int64_t lastTime = RTTimeMilliTS();
1746
1747	while (!mCompleted && aOperation >= m_ulCurrentOperation &&
1748	(forever \|\| timeLeft > 0))
1749	{
1750	alock.release();
1751	/* wait for the appropriate progress operation completion */
1752	rc = mProgresses[progress]-> WaitForOperationCompletion(operation,
1753	forever ? -1 : (LONG) timeLeft);
1754	alock.acquire();
1755
1756	if (SUCCEEDED(rc))
1757	rc = checkProgress();
1758
1759	if (FAILED(rc)) break;
1760
1761	if (!forever)
1762	{
1763	int64_t now = RTTimeMilliTS();
1764	timeLeft -= now - lastTime;
1765	lastTime = now;
1766	}
1767	}
1768
1769	if (FAILED(rc)) return rc;
1770	}
1771
1772	LogFlowThisFuncLeave();
1773
1774	return S_OK;
1775	}
1776
1777	STDMETHODIMP CombinedProgress::Cancel()
1778	{
1779	AutoCaller autoCaller(this);
1780	if (FAILED(autoCaller.rc())) return autoCaller.rc();
1781
1782	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1783
1784	if (!mCancelable)
1785	return setError(E_FAIL, tr("Operation cannot be canceled"));
1786
1787	if (!mCanceled)
1788	{
1789	LogThisFunc(("Canceling\n"));
1790	mCanceled = TRUE;
1791	/** @todo Teleportation: Shouldn't this be propagated to mProgresses? If
1792	* powerUp creates passes a combined progress object to the client, I
1793	* won't get called back since I'm only getting the powerupProgress ...
1794	* Or what? */
1795	if (m_pfnCancelCallback)
1796	m_pfnCancelCallback(m_pvCancelUserArg);
1797
1798	}
1799	else
1800	LogThisFunc(("Already canceled\n"));
1801
1802	return S_OK;
1803	}
1804
1805	// private methods
1806	////////////////////////////////////////////////////////////////////////////////
1807
1808	/**
1809	* Fetches the properties of the current progress object and, if it is
1810	* successfully completed, advances to the next uncompleted or unsuccessfully
1811	* completed object in the vector of combined progress objects.
1812	*
1813	* @note Must be called from under this object's write lock!
1814	*/
1815	HRESULT CombinedProgress::checkProgress()
1816	{
1817	/* do nothing if we're already marked ourselves as completed */
1818	if (mCompleted)
1819	return S_OK;
1820
1821	AssertReturn(mProgress < mProgresses.size(), E_FAIL);
1822
1823	ComPtr<IProgress> progress = mProgresses[mProgress];
1824	ComAssertRet(!progress.isNull(), E_FAIL);
1825
1826	HRESULT rc = S_OK;
1827	BOOL fCompleted = FALSE;
1828
1829	do
1830	{
1831	rc = progress->COMGETTER(Completed)(&fCompleted);
1832	if (FAILED(rc))
1833	return rc;
1834
1835	if (fCompleted)
1836	{
1837	rc = progress->COMGETTER(Canceled)(&mCanceled);
1838	if (FAILED(rc))
1839	return rc;
1840
1841	LONG iRc;
1842	rc = progress->COMGETTER(ResultCode)(&iRc);
1843	if (FAILED(rc))
1844	return rc;
1845	mResultCode = iRc;
1846
1847	if (FAILED(mResultCode))
1848	{
1849	rc = progress->COMGETTER(ErrorInfo)(mErrorInfo.asOutParam());
1850	if (FAILED(rc))
1851	return rc;
1852	}
1853
1854	if (FAILED(mResultCode) \|\| mCanceled)
1855	{
1856	mCompleted = TRUE;
1857	}
1858	else
1859	{
1860	ULONG opCount = 0;
1861	rc = progress->COMGETTER(OperationCount)(&opCount);
1862	if (FAILED(rc))
1863	return rc;
1864
1865	mCompletedOperations += opCount;
1866	mProgress ++;
1867
1868	if (mProgress < mProgresses.size())
1869	progress = mProgresses[mProgress];
1870	else
1871	mCompleted = TRUE;
1872	}
1873	}
1874	}
1875	while (fCompleted && !mCompleted);
1876
1877	rc = progress->COMGETTER(OperationPercent)(&m_ulOperationPercent);
1878	if (SUCCEEDED(rc))
1879	{
1880	ULONG operation = 0;
1881	rc = progress->COMGETTER(Operation)(&operation);
1882	if (SUCCEEDED(rc) && mCompletedOperations + operation > m_ulCurrentOperation)
1883	{
1884	m_ulCurrentOperation = mCompletedOperations + operation;
1885	rc = progress->COMGETTER(OperationDescription)(m_bstrOperationDescription.asOutParam());
1886	}
1887	}
1888
1889	return rc;
1890	}
1891	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-all/ProgressImpl.cpp@ 41105

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