| 1 | /** @file
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| 2 | * MS COM / XPCOM Abstraction Layer - Initialization and Termination.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2006-2007 innotek GmbH
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | */
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| 16 |
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| 17 | #if !defined (VBOX_WITH_XPCOM)
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| 18 |
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| 19 | #include <objbase.h>
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| 20 |
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| 21 | #else /* !defined (VBOX_WITH_XPCOM) */
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| 22 |
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| 23 | #include <stdlib.h>
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| 24 |
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| 25 | /* XPCOM_GLUE is defined when the client uses the standalone glue
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| 26 | * (i.e. dynamically picks up the existing XPCOM shared library installation).
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| 27 | * This is not the case for VirtualBox XPCOM clients (they are always
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| 28 | * distrubuted with the self-built XPCOM library, and therefore have a binary
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| 29 | * dependency on it) but left here for clarity.
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| 30 | */
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| 31 | #if defined (XPCOM_GLUE)
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| 32 | #include <nsXPCOMGlue.h>
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| 33 | #endif
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| 34 |
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| 35 | #include <nsIComponentRegistrar.h>
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| 36 | #include <nsIServiceManager.h>
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| 37 | #include <nsCOMPtr.h>
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| 38 | #include <nsEventQueueUtils.h>
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| 39 | #include <nsEmbedString.h>
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| 40 |
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| 41 | #include <nsILocalFile.h>
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| 42 | #include <nsIDirectoryService.h>
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| 43 | #include <nsDirectoryServiceDefs.h>
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| 44 |
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| 45 | #endif /* !defined (VBOX_WITH_XPCOM) */
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| 46 |
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| 47 | #include <iprt/param.h>
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| 48 | #include <iprt/path.h>
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| 49 | #include <iprt/string.h>
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| 50 | #include <iprt/env.h>
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| 51 | #include <iprt/asm.h>
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| 52 |
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| 53 | #include <VBox/err.h>
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| 54 |
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| 55 | #include "VBox/com/com.h"
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| 56 | #include "VBox/com/assert.h"
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| 57 |
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| 58 | #include "../include/Logging.h"
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| 59 |
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| 60 | namespace com
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| 61 | {
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| 62 |
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| 63 | #if defined (VBOX_WITH_XPCOM)
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| 64 |
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| 65 | class DirectoryServiceProvider : public nsIDirectoryServiceProvider
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| 66 | {
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| 67 | public:
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| 68 |
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| 69 | NS_DECL_ISUPPORTS
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| 70 |
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| 71 | DirectoryServiceProvider()
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| 72 | : mCompRegLocation (NULL), mXPTIDatLocation (NULL)
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| 73 | , mComponentDirLocation (NULL), mCurrProcDirLocation (NULL)
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| 74 | {}
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| 75 |
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| 76 | virtual ~DirectoryServiceProvider();
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| 77 |
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| 78 | HRESULT init (const char *aCompRegLocation,
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| 79 | const char *aXPTIDatLocation,
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| 80 | const char *aComponentDirLocation,
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| 81 | const char *aCurrProcDirLocation);
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| 82 |
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| 83 | NS_DECL_NSIDIRECTORYSERVICEPROVIDER
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| 84 |
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| 85 | private:
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| 86 |
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| 87 | char *mCompRegLocation;
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| 88 | char *mXPTIDatLocation;
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| 89 | char *mComponentDirLocation;
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| 90 | char *mCurrProcDirLocation;
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| 91 | };
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| 92 |
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| 93 | NS_IMPL_ISUPPORTS1 (DirectoryServiceProvider, nsIDirectoryServiceProvider)
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| 94 |
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| 95 | DirectoryServiceProvider::~DirectoryServiceProvider()
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| 96 | {
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| 97 | if (mCompRegLocation)
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| 98 | {
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| 99 | RTStrFree (mCompRegLocation);
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| 100 | mCompRegLocation = NULL;
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| 101 | }
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| 102 | if (mXPTIDatLocation)
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| 103 | {
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| 104 | RTStrFree (mXPTIDatLocation);
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| 105 | mXPTIDatLocation = NULL;
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| 106 | }
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| 107 | if (mComponentDirLocation)
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| 108 | {
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| 109 | RTStrFree (mComponentDirLocation);
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| 110 | mComponentDirLocation = NULL;
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| 111 | }
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| 112 | if (mCurrProcDirLocation)
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| 113 | {
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| 114 | RTStrFree (mCurrProcDirLocation);
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| 115 | mCurrProcDirLocation = NULL;
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| 116 | }
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| 117 | }
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| 118 |
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| 119 | /**
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| 120 | * @param aCompRegLocation Path to compreg.dat, in Utf8.
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| 121 | * @param aXPTIDatLocation Path to xpti.data, in Utf8.
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| 122 | */
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| 123 | HRESULT
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| 124 | DirectoryServiceProvider::init (const char *aCompRegLocation,
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| 125 | const char *aXPTIDatLocation,
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| 126 | const char *aComponentDirLocation,
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| 127 | const char *aCurrProcDirLocation)
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| 128 | {
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| 129 | AssertReturn (aCompRegLocation, NS_ERROR_INVALID_ARG);
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| 130 | AssertReturn (aXPTIDatLocation, NS_ERROR_INVALID_ARG);
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| 131 |
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| 132 | int vrc = RTStrUtf8ToCurrentCP (&mCompRegLocation, aCompRegLocation);
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| 133 | if (RT_SUCCESS (vrc))
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| 134 | vrc = RTStrUtf8ToCurrentCP (&mXPTIDatLocation, aXPTIDatLocation);
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| 135 | if (RT_SUCCESS (vrc) && aComponentDirLocation)
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| 136 | vrc = RTStrUtf8ToCurrentCP (&mComponentDirLocation, aComponentDirLocation);
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| 137 | if (RT_SUCCESS (vrc) && aCurrProcDirLocation)
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| 138 | vrc = RTStrUtf8ToCurrentCP (&mCurrProcDirLocation, aCurrProcDirLocation);
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| 139 |
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| 140 | return RT_SUCCESS (vrc) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
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| 141 | }
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| 142 |
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| 143 | NS_IMETHODIMP
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| 144 | DirectoryServiceProvider::GetFile (const char *aProp,
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| 145 | PRBool *aPersistent,
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| 146 | nsIFile **aRetval)
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| 147 | {
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| 148 | nsCOMPtr <nsILocalFile> localFile;
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| 149 | nsresult rv = NS_ERROR_FAILURE;
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| 150 |
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| 151 | *aRetval = nsnull;
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| 152 | *aPersistent = PR_TRUE;
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| 153 |
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| 154 | const char *fileLocation = NULL;
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| 155 |
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| 156 | if (strcmp (aProp, NS_XPCOM_COMPONENT_REGISTRY_FILE) == 0)
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| 157 | fileLocation = mCompRegLocation;
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| 158 | else if (strcmp (aProp, NS_XPCOM_XPTI_REGISTRY_FILE) == 0)
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| 159 | fileLocation = mXPTIDatLocation;
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| 160 | else if (mComponentDirLocation && strcmp (aProp, NS_XPCOM_COMPONENT_DIR) == 0)
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| 161 | fileLocation = mComponentDirLocation;
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| 162 | else if (mCurrProcDirLocation && strcmp (aProp, NS_XPCOM_CURRENT_PROCESS_DIR) == 0)
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| 163 | fileLocation = mCurrProcDirLocation;
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| 164 | else
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| 165 | return NS_ERROR_FAILURE;
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| 166 |
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| 167 | rv = NS_NewNativeLocalFile (nsEmbedCString (fileLocation),
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| 168 | PR_TRUE, getter_AddRefs (localFile));
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| 169 | if (NS_FAILED(rv))
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| 170 | return rv;
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| 171 |
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| 172 | return localFile->QueryInterface (NS_GET_IID (nsIFile),
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| 173 | (void **) aRetval);
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| 174 | }
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| 175 |
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| 176 | /**
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| 177 | * Global XPCOM initialization flag (we maintain it ourselves since XPCOM
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| 178 | * doesn't provide such functionality)
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| 179 | */
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| 180 | static bool gIsXPCOMInitialized = false;
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| 181 |
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| 182 | /**
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| 183 | * Number of Initialize() calls on the main thread.
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| 184 | */
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| 185 | static unsigned int gXPCOMInitCount = 0;
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| 186 |
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| 187 | #endif /* defined (VBOX_WITH_XPCOM) */
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| 188 |
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| 189 |
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| 190 | HRESULT Initialize()
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| 191 | {
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| 192 | HRESULT rc = E_FAIL;
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| 193 |
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| 194 | #if !defined (VBOX_WITH_XPCOM)
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| 195 |
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| 196 | DWORD flags = COINIT_MULTITHREADED |
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| 197 | COINIT_DISABLE_OLE1DDE |
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| 198 | COINIT_SPEED_OVER_MEMORY;
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| 199 |
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| 200 | rc = CoInitializeEx (NULL, flags);
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| 201 |
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| 202 | /// @todo the below rough method of changing the aparment type doesn't
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| 203 | /// work on some systems for unknown reason (CoUninitialize() simply does
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| 204 | /// nothing there, or at least all 10 000 of subsequent CoInitializeEx()
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| 205 | /// continue to return RPC_E_CHANGED_MODE there). The problem on those
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| 206 | /// systems is related to the "Extend support for advanced text services
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| 207 | /// to all programs" checkbox in the advanced language settings dialog,
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| 208 | /// i.e. the problem appears when this checkbox is checked and disappears
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| 209 | /// if you clear it. For this reason, we disable the code below and
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| 210 | /// instead initialize COM in MTA as early as possible, before 3rd party
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| 211 | /// libraries we use have done so (i.e. Qt3).
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| 212 | #if 0
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| 213 | /* If we fail to set the necessary apartment model, it may mean that some
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| 214 | * DLL that was indirectly loaded by the process calling this function has
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| 215 | * already initialized COM on the given thread in an incompatible way
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| 216 | * which we can't leave with. Therefore, we try to fix this by using the
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| 217 | * brute force method: */
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| 218 |
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| 219 | if (rc == RPC_E_CHANGED_MODE)
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| 220 | {
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| 221 | /* Before we use brute force, we need to check if we are in the
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| 222 | * neutral threaded apartment -- in this case there is no need to
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| 223 | * worry at all. */
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| 224 |
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| 225 | rc = CoInitializeEx (NULL, COINIT_APARTMENTTHREADED);
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| 226 | if (rc == RPC_E_CHANGED_MODE)
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| 227 | {
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| 228 | /* This is a neutral apartment, reset the error */
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| 229 | rc = S_OK;
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| 230 |
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| 231 | LogFlowFunc (("COM is already initialized in neutral threaded "
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| 232 | "apartment mode,\nwill accept it.\n"));
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| 233 | }
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| 234 | else if (rc == S_FALSE)
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| 235 | {
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| 236 | /* balance the test CoInitializeEx above */
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| 237 | CoUninitialize();
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| 238 | rc = RPC_E_CHANGED_MODE;
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| 239 |
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| 240 | LogFlowFunc (("COM is already initialized in single threaded "
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| 241 | "apartment mode,\nwill reinitialize as "
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| 242 | "multi threaded.\n"));
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| 243 |
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| 244 | enum { MaxTries = 10000 };
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| 245 | int tries = MaxTries;
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| 246 | while (rc == RPC_E_CHANGED_MODE && tries --)
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| 247 | {
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| 248 | CoUninitialize();
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| 249 | rc = CoInitializeEx (NULL, flags);
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| 250 | if (rc == S_OK)
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| 251 | {
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| 252 | /* We've successfully reinitialized COM; restore the
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| 253 | * initialization reference counter */
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| 254 |
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| 255 | LogFlowFunc (("Will call CoInitializeEx() %d times.\n",
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| 256 | MaxTries - tries));
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| 257 |
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| 258 | while (tries ++ < MaxTries)
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| 259 | {
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| 260 | rc = CoInitializeEx (NULL, flags);
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| 261 | Assert (rc == S_FALSE);
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| 262 | }
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| 263 | }
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| 264 | }
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| 265 | }
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| 266 | else
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| 267 | AssertMsgFailed (("rc=%08X\n", rc));
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| 268 | }
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| 269 | #endif
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| 270 |
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| 271 | /* the overall result must be either S_OK or S_FALSE (S_FALSE means
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| 272 | * "already initialized using the same apartment model") */
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| 273 | AssertMsg (rc == S_OK || rc == S_FALSE, ("rc=%08X\n", rc));
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| 274 |
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| 275 | #else /* !defined (VBOX_WITH_XPCOM) */
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| 276 |
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| 277 | if (ASMAtomicXchgBool (&gIsXPCOMInitialized, true) == true)
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| 278 | {
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| 279 | /* XPCOM is already initialized on the main thread, no special
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| 280 | * initialization is necessary on additional threads. Just increase
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| 281 | * the init counter if it's a main thread again (to correctly support
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| 282 | * nested calls to Initialize()/Shutdown() for compatibility with
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| 283 | * Win32). */
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| 284 |
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| 285 | nsCOMPtr <nsIEventQueue> eventQ;
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| 286 | rc = NS_GetMainEventQ (getter_AddRefs (eventQ));
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| 287 |
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| 288 | if (NS_SUCCEEDED (rc))
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| 289 | {
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| 290 | PRBool isOnMainThread = PR_FALSE;
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| 291 | rc = eventQ->IsOnCurrentThread (&isOnMainThread);
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| 292 | if (NS_SUCCEEDED (rc) && isOnMainThread)
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| 293 | ++ gXPCOMInitCount;
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| 294 | }
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| 295 |
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| 296 | AssertComRC (rc);
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| 297 | return rc;
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| 298 | }
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| 299 |
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| 300 | /* this is the first initialization */
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| 301 | gXPCOMInitCount = 1;
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| 302 |
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| 303 | /* Set VBOX_XPCOM_HOME if not present */
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| 304 | if (!RTEnvExist ("VBOX_XPCOM_HOME"))
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| 305 | {
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| 306 | /* get the executable path */
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| 307 | char pathProgram [RTPATH_MAX];
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| 308 | int vrc = RTPathProgram (pathProgram, sizeof (pathProgram));
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| 309 | if (RT_SUCCESS (vrc))
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| 310 | {
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| 311 | char *pathProgramCP = NULL;
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| 312 | vrc = RTStrUtf8ToCurrentCP (&pathProgramCP, pathProgram);
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| 313 | if (RT_SUCCESS (vrc))
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| 314 | {
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| 315 | vrc = RTEnvSet ("VBOX_XPCOM_HOME", pathProgramCP);
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| 316 | RTStrFree (pathProgramCP);
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| 317 | }
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| 318 | }
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| 319 | AssertRC (vrc);
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| 320 | }
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| 321 |
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| 322 | #if defined (XPCOM_GLUE)
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| 323 | XPCOMGlueStartup (nsnull);
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| 324 | #endif
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| 325 |
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| 326 | nsCOMPtr <DirectoryServiceProvider> dsProv;
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| 327 |
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| 328 | /* prepare paths for registry files */
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| 329 | char homeDir [RTPATH_MAX];
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| 330 | char privateArchDir [RTPATH_MAX];
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| 331 | int vrc = GetVBoxUserHomeDirectory (homeDir, sizeof (homeDir));
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| 332 | if (RT_SUCCESS (vrc))
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| 333 | vrc = RTPathAppPrivateArch (privateArchDir, sizeof (privateArchDir));
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| 334 | if (RT_SUCCESS (vrc))
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| 335 | {
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| 336 | char compReg [RTPATH_MAX];
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| 337 | char xptiDat [RTPATH_MAX];
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| 338 | char compDir [RTPATH_MAX];
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| 339 |
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| 340 | RTStrPrintf (compReg, sizeof (compReg), "%s%c%s",
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| 341 | homeDir, RTPATH_DELIMITER, "compreg.dat");
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| 342 | RTStrPrintf (xptiDat, sizeof (xptiDat), "%s%c%s",
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| 343 | homeDir, RTPATH_DELIMITER, "xpti.dat");
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| 344 | RTStrPrintf (compDir, sizeof (compDir), "%s%c/components",
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| 345 | privateArchDir, RTPATH_DELIMITER);
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| 346 |
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| 347 | LogFlowFunc (("component registry : \"%s\"\n", compReg));
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| 348 | LogFlowFunc (("XPTI data file : \"%s\"\n", xptiDat));
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| 349 | LogFlowFunc (("component directory : \"%s\"\n", compDir));
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| 350 |
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| 351 | dsProv = new DirectoryServiceProvider();
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| 352 | if (dsProv)
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| 353 | rc = dsProv->init (compReg, xptiDat, compDir, privateArchDir);
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| 354 | else
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| 355 | rc = NS_ERROR_OUT_OF_MEMORY;
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| 356 | }
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| 357 | else
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| 358 | rc = NS_ERROR_FAILURE;
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| 359 |
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| 360 | if (NS_SUCCEEDED (rc))
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| 361 | {
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| 362 | /* get the path to the executable */
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| 363 | nsCOMPtr <nsIFile> appDir;
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| 364 | {
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| 365 | char path [RTPATH_MAX];
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| 366 | char *appDirCP = NULL;
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| 367 | #if defined (DEBUG)
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| 368 | const char *env = RTEnvGet ("VIRTUALBOX_APP_HOME");
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| 369 | if (env)
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| 370 | {
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| 371 | char *appDirUtf8 = NULL;
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| 372 | vrc = RTStrCurrentCPToUtf8 (&appDirUtf8, env);
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| 373 | if (RT_SUCCESS (vrc))
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| 374 | {
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| 375 | vrc = RTPathReal (appDirUtf8, path, RTPATH_MAX);
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| 376 | if (RT_SUCCESS (vrc))
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| 377 | vrc = RTStrUtf8ToCurrentCP (&appDirCP, appDirUtf8);
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| 378 | RTStrFree (appDirUtf8);
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| 379 | }
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| 380 | }
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| 381 | else
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| 382 | #endif
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| 383 | {
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| 384 | vrc = RTPathProgram (path, RTPATH_MAX);
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| 385 | if (RT_SUCCESS (vrc))
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| 386 | vrc = RTStrUtf8ToCurrentCP (&appDirCP, path);
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| 387 | }
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| 388 |
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| 389 | if (RT_SUCCESS (vrc))
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| 390 | {
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| 391 | nsCOMPtr <nsILocalFile> file;
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| 392 | rc = NS_NewNativeLocalFile (nsEmbedCString (appDirCP),
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| 393 | PR_FALSE, getter_AddRefs (file));
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| 394 | if (NS_SUCCEEDED (rc))
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| 395 | appDir = do_QueryInterface (file, &rc);
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| 396 |
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| 397 | RTStrFree (appDirCP);
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| 398 | }
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| 399 | else
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| 400 | rc = NS_ERROR_FAILURE;
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| 401 | }
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| 402 |
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| 403 | /* Finally, initialize XPCOM */
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| 404 | if (NS_SUCCEEDED (rc))
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| 405 | {
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| 406 | nsCOMPtr <nsIServiceManager> serviceManager;
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| 407 | rc = NS_InitXPCOM2 (getter_AddRefs (serviceManager),
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| 408 | appDir, dsProv);
|
|---|
| 409 |
|
|---|
| 410 | if (NS_SUCCEEDED (rc))
|
|---|
| 411 | {
|
|---|
| 412 | nsCOMPtr <nsIComponentRegistrar> registrar =
|
|---|
| 413 | do_QueryInterface (serviceManager, &rc);
|
|---|
| 414 | if (NS_SUCCEEDED (rc))
|
|---|
| 415 | registrar->AutoRegister (nsnull);
|
|---|
| 416 | }
|
|---|
| 417 | }
|
|---|
| 418 | }
|
|---|
| 419 |
|
|---|
| 420 | #endif /* !defined (VBOX_WITH_XPCOM) */
|
|---|
| 421 |
|
|---|
| 422 | AssertComRC (rc);
|
|---|
| 423 |
|
|---|
| 424 | return rc;
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | HRESULT Shutdown()
|
|---|
| 428 | {
|
|---|
| 429 | HRESULT rc = S_OK;
|
|---|
| 430 |
|
|---|
| 431 | #if !defined (VBOX_WITH_XPCOM)
|
|---|
| 432 |
|
|---|
| 433 | CoUninitialize();
|
|---|
| 434 |
|
|---|
| 435 | #else /* !defined (VBOX_WITH_XPCOM) */
|
|---|
| 436 |
|
|---|
| 437 | nsCOMPtr <nsIEventQueue> eventQ;
|
|---|
| 438 | rc = NS_GetMainEventQ (getter_AddRefs (eventQ));
|
|---|
| 439 |
|
|---|
| 440 | if (NS_SUCCEEDED (rc) || rc == NS_ERROR_NOT_AVAILABLE)
|
|---|
| 441 | {
|
|---|
| 442 | /* NS_ERROR_NOT_AVAILABLE seems to mean that
|
|---|
| 443 | * nsIEventQueue::StopAcceptingEvents() has been called (see
|
|---|
| 444 | * nsEventQueueService.cpp). We hope that this error code always means
|
|---|
| 445 | * just that in this case and assume that we're on the main thread
|
|---|
| 446 | * (it's a kind of unexpected behavior if a non-main thread ever calls
|
|---|
| 447 | * StopAcceptingEvents() on the main event queue). */
|
|---|
| 448 |
|
|---|
| 449 | PRBool isOnMainThread = PR_FALSE;
|
|---|
| 450 | if (NS_SUCCEEDED (rc))
|
|---|
| 451 | {
|
|---|
| 452 | rc = eventQ->IsOnCurrentThread (&isOnMainThread);
|
|---|
| 453 | eventQ = nsnull; /* early release before shutdown */
|
|---|
| 454 | }
|
|---|
| 455 | else
|
|---|
| 456 | {
|
|---|
| 457 | isOnMainThread = PR_TRUE;
|
|---|
| 458 | rc = NS_OK;
|
|---|
| 459 | }
|
|---|
| 460 |
|
|---|
| 461 | if (NS_SUCCEEDED (rc) && isOnMainThread)
|
|---|
| 462 | {
|
|---|
| 463 | /* only the main thread needs to uninitialize XPCOM and only if
|
|---|
| 464 | * init counter drops to zero */
|
|---|
| 465 | if (-- gXPCOMInitCount == 0)
|
|---|
| 466 | {
|
|---|
| 467 | rc = NS_ShutdownXPCOM (nsnull);
|
|---|
| 468 |
|
|---|
| 469 | /* This is a thread initialized XPCOM and set gIsXPCOMInitialized to
|
|---|
| 470 | * true. Reset it back to false. */
|
|---|
| 471 | bool wasInited = ASMAtomicXchgBool (&gIsXPCOMInitialized, false);
|
|---|
| 472 | Assert (wasInited == true);
|
|---|
| 473 | NOREF (wasInited);
|
|---|
| 474 |
|
|---|
| 475 | #if defined (XPCOM_GLUE)
|
|---|
| 476 | XPCOMGlueShutdown();
|
|---|
| 477 | #endif
|
|---|
| 478 | }
|
|---|
| 479 | }
|
|---|
| 480 | }
|
|---|
| 481 |
|
|---|
| 482 | #endif /* !defined (VBOX_WITH_XPCOM) */
|
|---|
| 483 |
|
|---|
| 484 | AssertComRC (rc);
|
|---|
| 485 |
|
|---|
| 486 | return rc;
|
|---|
| 487 | }
|
|---|
| 488 |
|
|---|
| 489 | } /* namespace com */
|
|---|
