initterm.cpp@ 74942

Last change on this file since 74942 was 69732, checked in by vboxsync, 7 years ago
glue/initterm.cpp: Fixed assert to ignore ERROR_ACCESS_DENIED and moved hLeakIt assert into the ERROR_SUCCESS condition. Needed when launching 2nd VBoxSVC from non-elevated context.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 21.0 KB

Line
1	/* $Id: initterm.cpp 69732 2017-11-18 02:04:50Z vboxsync $ */
2
3	/** @file
4	* MS COM / XPCOM Abstraction Layer - Initialization and Termination.
5	*/
6
7	/*
8	* Copyright (C) 2006-2017 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	#if !defined(VBOX_WITH_XPCOM)
20
21	# include <iprt/nt/nt-and-windows.h>
22	# include <iprt/win/objbase.h>
23
24	#else /* !defined(VBOX_WITH_XPCOM) */
25
26	# include <stdlib.h>
27
28	# include <nsIComponentRegistrar.h>
29	# include <nsIServiceManager.h>
30	# include <nsCOMPtr.h>
31	# include <nsEventQueueUtils.h>
32	# include <nsEmbedString.h>
33
34	# include <nsILocalFile.h>
35	# include <nsIDirectoryService.h>
36	# include <nsDirectoryServiceDefs.h>
37
38	#endif /* !defined(VBOX_WITH_XPCOM) */
39
40	#include "VBox/com/com.h"
41	#include "VBox/com/assert.h"
42	#include "VBox/com/NativeEventQueue.h"
43	#include "VBox/com/AutoLock.h"
44
45	#include "../include/Logging.h"
46
47	#include <iprt/asm.h>
48	#include <iprt/env.h>
49	#include <iprt/ldr.h>
50	#include <iprt/param.h>
51	#include <iprt/path.h>
52	#include <iprt/string.h>
53	#include <iprt/thread.h>
54
55	#include <VBox/err.h>
56
57	namespace com
58	{
59
60	#if defined(VBOX_WITH_XPCOM)
61
62	class DirectoryServiceProvider : public nsIDirectoryServiceProvider
63	{
64	public:
65
66	NS_DECL_ISUPPORTS
67
68	DirectoryServiceProvider()
69	: mCompRegLocation(NULL), mXPTIDatLocation(NULL)
70	, mComponentDirLocation(NULL), mCurrProcDirLocation(NULL)
71	{}
72
73	virtual ~DirectoryServiceProvider();
74
75	HRESULT init(const char *aCompRegLocation,
76	const char *aXPTIDatLocation,
77	const char *aComponentDirLocation,
78	const char *aCurrProcDirLocation);
79
80	NS_DECL_NSIDIRECTORYSERVICEPROVIDER
81
82	private:
83	/** @remarks This is not a UTF-8 string. */
84	char *mCompRegLocation;
85	/** @remarks This is not a UTF-8 string. */
86	char *mXPTIDatLocation;
87	/** @remarks This is not a UTF-8 string. */
88	char *mComponentDirLocation;
89	/** @remarks This is not a UTF-8 string. */
90	char *mCurrProcDirLocation;
91	};
92
93	NS_IMPL_ISUPPORTS1(DirectoryServiceProvider, nsIDirectoryServiceProvider)
94
95	DirectoryServiceProvider::~DirectoryServiceProvider()
96	{
97	if (mCompRegLocation)
98	{
99	RTStrFree(mCompRegLocation);
100	mCompRegLocation = NULL;
101	}
102	if (mXPTIDatLocation)
103	{
104	RTStrFree(mXPTIDatLocation);
105	mXPTIDatLocation = NULL;
106	}
107	if (mComponentDirLocation)
108	{
109	RTStrFree(mComponentDirLocation);
110	mComponentDirLocation = NULL;
111	}
112	if (mCurrProcDirLocation)
113	{
114	RTStrFree(mCurrProcDirLocation);
115	mCurrProcDirLocation = NULL;
116	}
117	}
118
119	/**
120	* @param aCompRegLocation Path to compreg.dat, in Utf8.
121	* @param aXPTIDatLocation Path to xpti.data, in Utf8.
122	*/
123	HRESULT
124	DirectoryServiceProvider::init(const char *aCompRegLocation,
125	const char *aXPTIDatLocation,
126	const char *aComponentDirLocation,
127	const char *aCurrProcDirLocation)
128	{
129	AssertReturn(aCompRegLocation, NS_ERROR_INVALID_ARG);
130	AssertReturn(aXPTIDatLocation, NS_ERROR_INVALID_ARG);
131
132	/** @todo r=bird: Gotta check how this encoding stuff plays out on darwin!
133	* We get down to [VBoxNsxp]NS_NewNativeLocalFile and that file isn't
134	* nsLocalFileUnix.cpp on 32-bit darwin. On 64-bit darwin it's a question
135	* of what we're doing in IPRT and such... We should probably add a
136	* RTPathConvertToNative for use here. */
137	int vrc = RTStrUtf8ToCurrentCP(&mCompRegLocation, aCompRegLocation);
138	if (RT_SUCCESS(vrc))
139	vrc = RTStrUtf8ToCurrentCP(&mXPTIDatLocation, aXPTIDatLocation);
140	if (RT_SUCCESS(vrc) && aComponentDirLocation)
141	vrc = RTStrUtf8ToCurrentCP(&mComponentDirLocation, aComponentDirLocation);
142	if (RT_SUCCESS(vrc) && aCurrProcDirLocation)
143	vrc = RTStrUtf8ToCurrentCP(&mCurrProcDirLocation, aCurrProcDirLocation);
144
145	return RT_SUCCESS(vrc) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
146	}
147
148	NS_IMETHODIMP
149	DirectoryServiceProvider::GetFile(const char *aProp,
150	PRBool *aPersistent,
151	nsIFile **aRetval)
152	{
153	nsCOMPtr <nsILocalFile> localFile;
154	nsresult rv = NS_ERROR_FAILURE;
155
156	*aRetval = nsnull;
157	*aPersistent = PR_TRUE;
158
159	const char *fileLocation = NULL;
160
161	if (strcmp(aProp, NS_XPCOM_COMPONENT_REGISTRY_FILE) == 0)
162	fileLocation = mCompRegLocation;
163	else if (strcmp(aProp, NS_XPCOM_XPTI_REGISTRY_FILE) == 0)
164	fileLocation = mXPTIDatLocation;
165	else if (mComponentDirLocation && strcmp(aProp, NS_XPCOM_COMPONENT_DIR) == 0)
166	fileLocation = mComponentDirLocation;
167	else if (mCurrProcDirLocation && strcmp(aProp, NS_XPCOM_CURRENT_PROCESS_DIR) == 0)
168	fileLocation = mCurrProcDirLocation;
169	else
170	return NS_ERROR_FAILURE;
171
172	rv = NS_NewNativeLocalFile(nsEmbedCString(fileLocation),
173	PR_TRUE, getter_AddRefs(localFile));
174	if (NS_FAILED(rv))
175	return rv;
176
177	return localFile->QueryInterface(NS_GET_IID(nsIFile), (void **)aRetval);
178	}
179
180	/**
181	* Global XPCOM initialization flag (we maintain it ourselves since XPCOM
182	* doesn't provide such functionality)
183	*/
184	static bool volatile gIsXPCOMInitialized = false;
185
186	/**
187	* Number of Initialize() calls on the main thread.
188	*/
189	static unsigned int gXPCOMInitCount = 0;
190
191	#else /* !defined(VBOX_WITH_XPCOM) */
192
193	/**
194	* The COM main thread handle. (The first caller of com::Initialize().)
195	*/
196	static RTTHREAD volatile gCOMMainThread = NIL_RTTHREAD;
197
198	/**
199	* Number of Initialize() calls on the main thread.
200	*/
201	static uint32_t gCOMMainInitCount = 0;
202
203	#endif /* !defined(VBOX_WITH_XPCOM) */
204
205
206	/**
207	* Initializes the COM runtime.
208	*
209	* This method must be called on each thread of the client application that
210	* wants to access COM facilities. The initialization must be performed before
211	* calling any other COM method or attempting to instantiate COM objects.
212	*
213	* On platforms using XPCOM, this method uses the following scheme to search for
214	* XPCOM runtime:
215	*
216	* 1. If the VBOX_APP_HOME environment variable is set, the path it specifies
217	* is used to search XPCOM libraries and components. If this method fails to
218	* initialize XPCOM runtime using this path, it will immediately return a
219	* failure and will NOT check for other paths as described below.
220	*
221	* 2. If VBOX_APP_HOME is not set, this methods tries the following paths in the
222	* given order:
223	*
224	* a) Compiled-in application data directory (as returned by
225	* RTPathAppPrivateArch())
226	* b) "/usr/lib/virtualbox" (Linux only)
227	* c) "/opt/VirtualBox" (Linux only)
228	*
229	* The first path for which the initialization succeeds will be used.
230	*
231	* On MS COM platforms, the COM runtime is provided by the system and does not
232	* need to be searched for.
233	*
234	* Once the COM subsystem is no longer necessary on a given thread, Shutdown()
235	* must be called to free resources allocated for it. Note that a thread may
236	* call Initialize() several times but for each of tese calls there must be a
237	* corresponding Shutdown() call.
238	*
239	* @return S_OK on success and a COM result code in case of failure.
240	*/
241	HRESULT Initialize(bool fGui /= false/, bool fAutoRegUpdate /= true/)
242	{
243	HRESULT rc = E_FAIL;
244	NOREF(fAutoRegUpdate);
245
246	#if !defined(VBOX_WITH_XPCOM)
247
248	# ifdef VBOX_WITH_AUTO_COM_REG_UPDATE
249	/*
250	* First time we're called in a process, we refresh the VBox COM
251	* registrations. Use a global mutex to prevent updating when there are
252	* API users already active, as that could lead to a bit of a mess.
253	*/
254	if ( fAutoRegUpdate
255	&& gCOMMainThread == NIL_RTTHREAD)
256	{
257	SetLastError(ERROR_SUCCESS);
258	HANDLE hLeakIt = CreateMutexW(NULL/pSecAttr/, FALSE, L"Global\\VirtualBoxComLazyRegistrationMutant");
259	DWORD dwErr = GetLastError();
260	AssertMsg(dwErr == ERROR_SUCCESS \|\| dwErr == ERROR_ALREADY_EXISTS \|\| dwErr == ERROR_ACCESS_DENIED, ("%u\n", dwErr));
261	if (dwErr == ERROR_SUCCESS)
262	{
263	char szPath[RTPATH_MAX];
264	int vrc = RTPathAppPrivateArch(szPath, sizeof(szPath));
265	if (RT_SUCCESS(vrc))
266	# ifndef VBOX_IN_32_ON_64_MAIN_API
267	vrc = RTPathAppend(szPath, sizeof(szPath),
268	RT_MAKE_U64(((PKUSER_SHARED_DATA)MM_SHARED_USER_DATA_VA)->NtMinorVersion,
269	((PKUSER_SHARED_DATA)MM_SHARED_USER_DATA_VA)->NtMajorVersion)
270	>= RT_MAKE_U64(1/Lo/,6/Hi/)
271	? "VBoxProxyStub.dll" : "VBoxProxyStubLegacy.dll");
272	# else
273	vrc = RTPathAppend(szPath, sizeof(szPath), "x86\\VBoxProxyStub-x86.dll");
274	# endif
275	if (RT_SUCCESS(vrc))
276	{
277	RTLDRMOD hMod;
278	vrc = RTLdrLoad(szPath, &hMod);
279	if (RT_SUCCESS(vrc))
280	{
281	union
282	{
283	void *pv;
284	DECLCALLBACKMEMBER(uint32_t, pfnRegUpdate)(void);
285	} u;
286	vrc = RTLdrGetSymbol(hMod, "VbpsUpdateRegistrations", &u.pv);
287	if (RT_SUCCESS(vrc))
288	u.pfnRegUpdate();
289	/* Just keep it loaded. */
290	}
291	}
292	Assert(hLeakIt != NULL); NOREF(hLeakIt);
293	}
294	}
295	# endif
296
297	/*
298	* We initialize COM in GUI thread in STA, to be compliant with QT and
299	* OLE requirments (for example to allow D&D), while other threads
300	* initialized in regular MTA. To allow fast proxyless access from
301	* GUI thread to COM objects, we explicitly provide our COM objects
302	* with free threaded marshaller.
303	* !!!!! Please think twice before touching this code !!!!!
304	*/
305	DWORD flags = fGui ?
306	COINIT_APARTMENTTHREADED
307	\| COINIT_SPEED_OVER_MEMORY
308	:
309	COINIT_MULTITHREADED
310	\| COINIT_DISABLE_OLE1DDE
311	\| COINIT_SPEED_OVER_MEMORY;
312
313	rc = CoInitializeEx(NULL, flags);
314
315	/* the overall result must be either S_OK or S_FALSE (S_FALSE means
316	* "already initialized using the same apartment model") */
317	AssertMsg(rc == S_OK \|\| rc == S_FALSE, ("rc=%08X\n", rc));
318
319	/* To be flow compatible with the XPCOM case, we return here if this isn't
320	* the main thread or if it isn't its first initialization call.
321	* Note! CoInitializeEx and CoUninitialize does it's own reference
322	* counting, so this exercise is entirely for the EventQueue init. */
323	bool fRc;
324	RTTHREAD hSelf = RTThreadSelf();
325	if (hSelf != NIL_RTTHREAD)
326	ASMAtomicCmpXchgHandle(&gCOMMainThread, hSelf, NIL_RTTHREAD, fRc);
327	else
328	fRc = false;
329
330	if (fGui)
331	Assert(RTThreadIsMain(hSelf));
332
333	if (!fRc)
334	{
335	if ( gCOMMainThread == hSelf
336	&& SUCCEEDED(rc))
337	gCOMMainInitCount++;
338
339	AssertComRC(rc);
340	return rc;
341	}
342	Assert(RTThreadIsMain(hSelf));
343
344	/* this is the first main thread initialization */
345	Assert(gCOMMainInitCount == 0);
346	if (SUCCEEDED(rc))
347	gCOMMainInitCount = 1;
348
349	#else /* !defined(VBOX_WITH_XPCOM) */
350
351	/* Unused here */
352	NOREF(fGui);
353
354	if (ASMAtomicXchgBool(&gIsXPCOMInitialized, true) == true)
355	{
356	/* XPCOM is already initialized on the main thread, no special
357	* initialization is necessary on additional threads. Just increase
358	* the init counter if it's a main thread again (to correctly support
359	* nested calls to Initialize()/Shutdown() for compatibility with
360	* Win32). */
361
362	nsCOMPtr<nsIEventQueue> eventQ;
363	rc = NS_GetMainEventQ(getter_AddRefs(eventQ));
364
365	if (NS_SUCCEEDED(rc))
366	{
367	PRBool isOnMainThread = PR_FALSE;
368	rc = eventQ->IsOnCurrentThread(&isOnMainThread);
369	if (NS_SUCCEEDED(rc) && isOnMainThread)
370	++gXPCOMInitCount;
371	}
372
373	AssertComRC(rc);
374	return rc;
375	}
376	Assert(RTThreadIsMain(RTThreadSelf()));
377
378	/* this is the first initialization */
379	gXPCOMInitCount = 1;
380
381	/* prepare paths for registry files */
382	char szCompReg[RTPATH_MAX];
383	char szXptiDat[RTPATH_MAX];
384
385	int vrc = GetVBoxUserHomeDirectory(szCompReg, sizeof(szCompReg));
386	if (vrc == VERR_ACCESS_DENIED)
387	return NS_ERROR_FILE_ACCESS_DENIED;
388	AssertRCReturn(vrc, NS_ERROR_FAILURE);
389	vrc = RTStrCopy(szXptiDat, sizeof(szXptiDat), szCompReg);
390	AssertRCReturn(vrc, NS_ERROR_FAILURE);
391	# ifdef VBOX_IN_32_ON_64_MAIN_API
392	vrc = RTPathAppend(szCompReg, sizeof(szCompReg), "compreg-x86.dat");
393	AssertRCReturn(vrc, NS_ERROR_FAILURE);
394	vrc = RTPathAppend(szXptiDat, sizeof(szXptiDat), "xpti-x86.dat");
395	AssertRCReturn(vrc, NS_ERROR_FAILURE);
396	# else
397	vrc = RTPathAppend(szCompReg, sizeof(szCompReg), "compreg.dat");
398	AssertRCReturn(vrc, NS_ERROR_FAILURE);
399	vrc = RTPathAppend(szXptiDat, sizeof(szXptiDat), "xpti.dat");
400	AssertRCReturn(vrc, NS_ERROR_FAILURE);
401	# endif
402
403	LogFlowFunc(("component registry : \"%s\"\n", szCompReg));
404	LogFlowFunc(("XPTI data file : \"%s\"\n", szXptiDat));
405
406	static const char *kAppPathsToProbe[] =
407	{
408	NULL, /* 0: will use VBOX_APP_HOME */
409	NULL, /* 1: will try RTPathAppPrivateArch(), correctly installed release builds will never go further */
410	NULL, /* 2: will try parent directory of RTPathAppPrivateArch(), only for testcases in non-hardened builds */
411	/* There used to be hard coded paths, but they only caused trouble
412	* because they often led to mixing of builds or even versions.
413	* If you feel tempted to add anything here, think again. They would
414	* only be used if option 1 would not work, which is a sign of a big
415	* problem, as it returns a fixed location defined at compile time.
416	* It is better to fail than blindly trying to cover the problem. */
417	};
418
419	/* Find out the directory where VirtualBox binaries are located */
420	for (size_t i = 0; i < RT_ELEMENTS(kAppPathsToProbe); ++ i)
421	{
422	char szAppHomeDir[RTPATH_MAX];
423
424	if (i == 0)
425	{
426	/* Use VBOX_APP_HOME if present */
427	vrc = RTEnvGetEx(RTENV_DEFAULT, "VBOX_APP_HOME", szAppHomeDir, sizeof(szAppHomeDir), NULL);
428	if (vrc == VERR_ENV_VAR_NOT_FOUND)
429	continue;
430	AssertRC(vrc);
431	}
432	else if (i == 1)
433	{
434	/* Use RTPathAppPrivateArch() first */
435	vrc = RTPathAppPrivateArch(szAppHomeDir, sizeof(szAppHomeDir));
436	AssertRC(vrc);
437	}
438	else if (i == 2)
439	{
440	# ifdef VBOX_WITH_HARDENING
441	continue;
442	# else /* !VBOX_WITH_HARDENING */
443	/* Use parent of RTPathAppPrivateArch() if ends with "testcase" */
444	vrc = RTPathAppPrivateArch(szAppHomeDir, sizeof(szAppHomeDir));
445	AssertRC(vrc);
446	vrc = RTPathStripTrailingSlash(szAppHomeDir);
447	AssertRC(vrc);
448	char *filename = RTPathFilename(szAppHomeDir);
449	if (!filename \|\| strcmp(filename, "testcase"))
450	continue;
451	RTPathStripFilename(szAppHomeDir);
452	# endif /* !VBOX_WITH_HARDENING */
453	}
454	else
455	{
456	/* Iterate over all other paths */
457	RTStrCopy(szAppHomeDir, sizeof(szAppHomeDir), kAppPathsToProbe[i]);
458	vrc = VINF_SUCCESS;
459	}
460	if (RT_FAILURE(vrc))
461	{
462	rc = NS_ERROR_FAILURE;
463	continue;
464	}
465	char szCompDir[RTPATH_MAX];
466	vrc = RTStrCopy(szCompDir, sizeof(szCompDir), szAppHomeDir);
467	if (RT_FAILURE(vrc))
468	{
469	rc = NS_ERROR_FAILURE;
470	continue;
471	}
472	vrc = RTPathAppend(szCompDir, sizeof(szCompDir), "components");
473	if (RT_FAILURE(vrc))
474	{
475	rc = NS_ERROR_FAILURE;
476	continue;
477	}
478	LogFlowFunc(("component directory : \"%s\"\n", szCompDir));
479
480	nsCOMPtr<DirectoryServiceProvider> dsProv;
481	dsProv = new DirectoryServiceProvider();
482	if (dsProv)
483	rc = dsProv->init(szCompReg, szXptiDat, szCompDir, szAppHomeDir);
484	else
485	rc = NS_ERROR_OUT_OF_MEMORY;
486	if (NS_FAILED(rc))
487	break;
488
489	/* Setup the application path for NS_InitXPCOM2. Note that we properly
490	* answer the NS_XPCOM_CURRENT_PROCESS_DIR query in our directory
491	* service provider but it seems to be activated after the directory
492	* service is used for the first time (see the source NS_InitXPCOM2). So
493	* use the same value here to be on the safe side. */
494	nsCOMPtr <nsIFile> appDir;
495	{
496	char *appDirCP = NULL;
497	vrc = RTStrUtf8ToCurrentCP(&appDirCP, szAppHomeDir);
498	if (RT_SUCCESS(vrc))
499	{
500	nsCOMPtr<nsILocalFile> file;
501	rc = NS_NewNativeLocalFile(nsEmbedCString(appDirCP),
502	PR_FALSE, getter_AddRefs(file));
503	if (NS_SUCCEEDED(rc))
504	appDir = do_QueryInterface(file, &rc);
505
506	RTStrFree(appDirCP);
507	}
508	else
509	rc = NS_ERROR_FAILURE;
510	}
511	if (NS_FAILED(rc))
512	break;
513
514	/* Set VBOX_XPCOM_HOME to the same app path to make XPCOM sources that
515	* still use it instead of the directory service happy */
516	vrc = RTEnvSetEx(RTENV_DEFAULT, "VBOX_XPCOM_HOME", szAppHomeDir);
517	AssertRC(vrc);
518
519	/* Finally, initialize XPCOM */
520	{
521	nsCOMPtr<nsIServiceManager> serviceManager;
522	rc = NS_InitXPCOM2(getter_AddRefs(serviceManager), appDir, dsProv);
523	if (NS_SUCCEEDED(rc))
524	{
525	nsCOMPtr<nsIComponentRegistrar> registrar =
526	do_QueryInterface(serviceManager, &rc);
527	if (NS_SUCCEEDED(rc))
528	{
529	rc = registrar->AutoRegister(nsnull);
530	if (NS_SUCCEEDED(rc))
531	{
532	/* We succeeded, stop probing paths */
533	LogFlowFunc(("Succeeded.\n"));
534	break;
535	}
536	}
537	}
538	}
539
540	/* clean up before the new try */
541	HRESULT rc2 = NS_ShutdownXPCOM(nsnull);
542	if (SUCCEEDED(rc))
543	rc = rc2;
544
545	if (i == 0)
546	{
547	/* We failed with VBOX_APP_HOME, don't probe other paths */
548	break;
549	}
550	}
551
552	#endif /* !defined(VBOX_WITH_XPCOM) */
553
554	AssertComRCReturnRC(rc);
555
556	// for both COM and XPCOM, we only get here if this is the main thread;
557	// only then initialize the autolock system (AutoLock.cpp)
558	Assert(RTThreadIsMain(RTThreadSelf()));
559	util::InitAutoLockSystem();
560
561	/*
562	* Init the main event queue (ASSUMES it cannot fail).
563	*/
564	if (SUCCEEDED(rc))
565	NativeEventQueue::init();
566
567	return rc;
568	}
569
570	HRESULT Shutdown()
571	{
572	HRESULT rc = S_OK;
573
574	#if !defined(VBOX_WITH_XPCOM)
575
576	/* EventQueue::uninit reference counting fun. */
577	RTTHREAD hSelf = RTThreadSelf();
578	if ( hSelf == gCOMMainThread
579	&& hSelf != NIL_RTTHREAD)
580	{
581	if (-- gCOMMainInitCount == 0)
582	{
583	NativeEventQueue::uninit();
584	ASMAtomicWriteHandle(&gCOMMainThread, NIL_RTTHREAD);
585	}
586	}
587
588	CoUninitialize();
589
590	#else /* !defined(VBOX_WITH_XPCOM) */
591
592	nsCOMPtr<nsIEventQueue> eventQ;
593	rc = NS_GetMainEventQ(getter_AddRefs(eventQ));
594
595	if (NS_SUCCEEDED(rc) \|\| rc == NS_ERROR_NOT_AVAILABLE)
596	{
597	/* NS_ERROR_NOT_AVAILABLE seems to mean that
598	* nsIEventQueue::StopAcceptingEvents() has been called (see
599	* nsEventQueueService.cpp). We hope that this error code always means
600	* just that in this case and assume that we're on the main thread
601	* (it's a kind of unexpected behavior if a non-main thread ever calls
602	* StopAcceptingEvents() on the main event queue). */
603
604	PRBool isOnMainThread = PR_FALSE;
605	if (NS_SUCCEEDED(rc))
606	{
607	rc = eventQ->IsOnCurrentThread(&isOnMainThread);
608	eventQ = nsnull; /* early release before shutdown */
609	}
610	else
611	{
612	isOnMainThread = RTThreadIsMain(RTThreadSelf());
613	rc = NS_OK;
614	}
615
616	if (NS_SUCCEEDED(rc) && isOnMainThread)
617	{
618	/* only the main thread needs to uninitialize XPCOM and only if
619	* init counter drops to zero */
620	if (--gXPCOMInitCount == 0)
621	{
622	NativeEventQueue::uninit();
623	rc = NS_ShutdownXPCOM(nsnull);
624
625	/* This is a thread initialized XPCOM and set gIsXPCOMInitialized to
626	* true. Reset it back to false. */
627	bool wasInited = ASMAtomicXchgBool(&gIsXPCOMInitialized, false);
628	Assert(wasInited == true);
629	NOREF(wasInited);
630	}
631	}
632	}
633
634	#endif /* !defined(VBOX_WITH_XPCOM) */
635
636	AssertComRC(rc);
637
638	return rc;
639	}
640
641	} /* namespace com */

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source: vbox/trunk/src/VBox/Main/glue/initterm.cpp@ 74942

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