LCOV - code coverage report
Current view: directory - xpcom/reflect/xptinfo/src - xptiInterfaceInfoManager.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 169 91 53.8 %
Date: 2012-06-02 Functions: 25 17 68.0 %

       1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1999
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Mike McCabe <mccabe@netscape.com>
      24                 :  *   John Bandhauer <jband@netscape.com>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : /* Implementation of xptiInterfaceInfoManager. */
      41                 : 
      42                 : #include "xptiprivate.h"
      43                 : #include "nsDependentString.h"
      44                 : #include "nsString.h"
      45                 : #include "nsISupportsArray.h"
      46                 : #include "nsArrayEnumerator.h"
      47                 : #include "mozilla/FunctionTimer.h"
      48                 : #include "nsDirectoryService.h"
      49                 : #include "mozilla/FileUtils.h"
      50                 : 
      51                 : using namespace mozilla;
      52                 : 
      53          678331 : NS_IMPL_THREADSAFE_ISUPPORTS2(xptiInterfaceInfoManager, 
      54                 :                               nsIInterfaceInfoManager,
      55                 :                               nsIInterfaceInfoSuperManager)
      56                 : 
      57                 : static xptiInterfaceInfoManager* gInterfaceInfoManager = nsnull;
      58                 : #ifdef DEBUG
      59                 : static int gCallCount = 0;
      60                 : #endif
      61                 : 
      62                 : // static
      63                 : xptiInterfaceInfoManager*
      64         1969627 : xptiInterfaceInfoManager::GetSingleton()
      65                 : {
      66         1969627 :     if (!gInterfaceInfoManager) {
      67                 :         NS_TIME_FUNCTION;
      68                 : 
      69            1419 :         gInterfaceInfoManager = new xptiInterfaceInfoManager();
      70            1419 :         NS_ADDREF(gInterfaceInfoManager);
      71                 :     }
      72         1969627 :     return gInterfaceInfoManager;
      73                 : }
      74                 : 
      75                 : void
      76            1419 : xptiInterfaceInfoManager::FreeInterfaceInfoManager()
      77                 : {
      78            1419 :     NS_IF_RELEASE(gInterfaceInfoManager);
      79            1419 : }
      80                 : 
      81            1419 : xptiInterfaceInfoManager::xptiInterfaceInfoManager()
      82                 :     :   mWorkingSet(),
      83                 :         mResolveLock("xptiInterfaceInfoManager.mResolveLock"),
      84                 :         mAdditionalManagersLock(
      85            1419 :             "xptiInterfaceInfoManager.mAdditionalManagersLock")
      86                 : {
      87            1419 : }
      88                 : 
      89            2818 : xptiInterfaceInfoManager::~xptiInterfaceInfoManager()
      90                 : {
      91                 :     // We only do this on shutdown of the service.
      92            1409 :     mWorkingSet.InvalidateInterfaceInfos();
      93                 : 
      94            1409 :     gInterfaceInfoManager = nsnull;
      95                 : #ifdef DEBUG
      96            1409 :     gCallCount = 0;
      97                 : #endif
      98            1409 : }
      99                 : 
     100                 : void
     101          218497 : xptiInterfaceInfoManager::RegisterBuffer(char *buf, PRUint32 length)
     102                 : {
     103          218497 :     XPTState *state = XPT_NewXDRState(XPT_DECODE, buf, length);
     104          218497 :     if (!state)
     105               0 :         return;
     106                 : 
     107                 :     XPTCursor cursor;
     108          218497 :     if (!XPT_MakeCursor(state, XPT_HEADER, 0, &cursor)) {
     109               0 :         XPT_DestroyXDRState(state);
     110               0 :         return;
     111                 :     }
     112                 : 
     113          218497 :     XPTHeader *header = nsnull;
     114          218497 :     if (XPT_DoHeader(gXPTIStructArena, &cursor, &header)) {
     115          218497 :         RegisterXPTHeader(header);
     116                 :     }
     117                 : 
     118          218497 :     XPT_DestroyXDRState(state);
     119                 : }
     120                 : 
     121                 : void
     122          218497 : xptiInterfaceInfoManager::RegisterXPTHeader(XPTHeader* aHeader)
     123                 : {
     124          218497 :     if (aHeader->major_version >= XPT_MAJOR_INCOMPATIBLE_VERSION) {
     125               0 :         NS_ASSERTION(!aHeader->num_interfaces,"bad libxpt");
     126                 :         LOG_AUTOREG(("      file is version %d.%d  Type file of version %d.0 or higher can not be read.\n", (int)header->major_version, (int)header->minor_version, (int)XPT_MAJOR_INCOMPATIBLE_VERSION));
     127                 :     }
     128                 : 
     129          218497 :     xptiTypelibGuts* typelib = xptiTypelibGuts::Create(aHeader);
     130                 : 
     131          436994 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     132         3616498 :     for(PRUint16 k = 0; k < aHeader->num_interfaces; k++)
     133         3398001 :         VerifyAndAddEntryIfNew(aHeader->interface_directory + k, k, typelib);
     134          218497 : }
     135                 : 
     136                 : void
     137         3398001 : xptiInterfaceInfoManager::VerifyAndAddEntryIfNew(XPTInterfaceDirectoryEntry* iface,
     138                 :                                                  PRUint16 idx,
     139                 :                                                  xptiTypelibGuts* typelib)
     140                 : {
     141         3398001 :     if (!iface->interface_descriptor)
     142         1229947 :         return;
     143                 : 
     144                 :     // The number of maximum methods is not arbitrary. It is the same value as
     145                 :     // in xpcom/reflect/xptcall/public/genstubs.pl; do not change this value
     146                 :     // without changing that one or you WILL see problems.
     147         2169473 :     if (iface->interface_descriptor->num_methods > 250 &&
     148            1419 :             !(XPT_ID_IS_BUILTINCLASS(iface->interface_descriptor->flags))) {
     149               0 :         NS_ASSERTION(0, "Too many methods to handle for the stub, cannot load");
     150               0 :         fprintf(stderr, "ignoring too large interface: %s\n", iface->name);
     151               0 :         return;
     152                 :     }
     153                 :     
     154         2168054 :     mWorkingSet.mTableReentrantMonitor.AssertCurrentThreadIn();
     155         2168054 :     xptiInterfaceEntry* entry = mWorkingSet.mIIDTable.Get(iface->iid);
     156         2168054 :     if (entry) {
     157                 :         // XXX validate this info to find possible inconsistencies
     158                 :         LOG_AUTOREG(("      ignoring repeated interface: %s\n", iface->name));
     159            8336 :         return;
     160                 :     }
     161                 :     
     162                 :     // Build a new xptiInterfaceEntry object and hook it up. 
     163                 : 
     164                 :     entry = xptiInterfaceEntry::Create(iface->name,
     165                 :                                        iface->iid,
     166                 :                                        iface->interface_descriptor,
     167         2159718 :                                        typelib);
     168         2159718 :     if (!entry)
     169               0 :         return;
     170                 : 
     171                 :     //XXX  We should SetHeader too as part of the validation, no?
     172         2159718 :     entry->SetScriptableFlag(XPT_ID_IS_SCRIPTABLE(iface->interface_descriptor->flags));
     173         2159718 :     entry->SetBuiltinClassFlag(XPT_ID_IS_BUILTINCLASS(iface->interface_descriptor->flags));
     174                 : 
     175         2159718 :     mWorkingSet.mIIDTable.Put(entry->IID(), entry);
     176         2159718 :     mWorkingSet.mNameTable.Put(entry->GetTheName(), entry);
     177                 : 
     178         2159718 :     typelib->SetEntryAt(idx, entry);
     179                 : 
     180                 :     LOG_AUTOREG(("      added interface: %s\n", iface->name));
     181                 : }
     182                 : 
     183                 : // this is a private helper
     184                 : static nsresult 
     185          654719 : EntryToInfo(xptiInterfaceEntry* entry, nsIInterfaceInfo **_retval)
     186                 : {
     187                 :     xptiInterfaceInfo* info;
     188                 :     nsresult rv;
     189                 : 
     190          654719 :     if (!entry) {
     191            9033 :         *_retval = nsnull;
     192            9033 :         return NS_ERROR_FAILURE;    
     193                 :     }
     194                 : 
     195          645686 :     rv = entry->GetInterfaceInfo(&info);
     196          645686 :     if (NS_FAILED(rv))
     197               0 :         return rv;
     198                 : 
     199                 :     // Transfer the AddRef done by GetInterfaceInfo.
     200          645686 :     *_retval = static_cast<nsIInterfaceInfo*>(info);
     201          645686 :     return NS_OK;    
     202                 : }
     203                 : 
     204                 : xptiInterfaceEntry*
     205          106804 : xptiInterfaceInfoManager::GetInterfaceEntryForIID(const nsIID *iid)
     206                 : {
     207          213608 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     208          106804 :     return mWorkingSet.mIIDTable.Get(*iid);
     209                 : }
     210                 : 
     211                 : /* nsIInterfaceInfo getInfoForIID (in nsIIDPtr iid); */
     212          426339 : NS_IMETHODIMP xptiInterfaceInfoManager::GetInfoForIID(const nsIID * iid, nsIInterfaceInfo **_retval)
     213                 : {
     214          426339 :     NS_ASSERTION(iid, "bad param");
     215          426339 :     NS_ASSERTION(_retval, "bad param");
     216                 : 
     217          852678 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     218          426339 :     xptiInterfaceEntry* entry = mWorkingSet.mIIDTable.Get(*iid);
     219          426339 :     return EntryToInfo(entry, _retval);
     220                 : }
     221                 : 
     222                 : /* nsIInterfaceInfo getInfoForName (in string name); */
     223           98330 : NS_IMETHODIMP xptiInterfaceInfoManager::GetInfoForName(const char *name, nsIInterfaceInfo **_retval)
     224                 : {
     225           98330 :     NS_ASSERTION(name, "bad param");
     226           98330 :     NS_ASSERTION(_retval, "bad param");
     227                 : 
     228          196660 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     229           98330 :     xptiInterfaceEntry* entry = mWorkingSet.mNameTable.Get(name);
     230           98330 :     return EntryToInfo(entry, _retval);
     231                 : }
     232                 : 
     233                 : /* nsIIDPtr getIIDForName (in string name); */
     234               0 : NS_IMETHODIMP xptiInterfaceInfoManager::GetIIDForName(const char *name, nsIID * *_retval)
     235                 : {
     236               0 :     NS_ASSERTION(name, "bad param");
     237               0 :     NS_ASSERTION(_retval, "bad param");
     238                 : 
     239               0 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     240               0 :     xptiInterfaceEntry* entry = mWorkingSet.mNameTable.Get(name);
     241               0 :     if (!entry) {
     242               0 :         *_retval = nsnull;
     243               0 :         return NS_ERROR_FAILURE;    
     244                 :     }
     245                 : 
     246               0 :     return entry->GetIID(_retval);
     247                 : }
     248                 : 
     249                 : /* string getNameForIID (in nsIIDPtr iid); */
     250               0 : NS_IMETHODIMP xptiInterfaceInfoManager::GetNameForIID(const nsIID * iid, char **_retval)
     251                 : {
     252               0 :     NS_ASSERTION(iid, "bad param");
     253               0 :     NS_ASSERTION(_retval, "bad param");
     254                 : 
     255               0 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     256               0 :     xptiInterfaceEntry* entry = mWorkingSet.mIIDTable.Get(*iid);
     257               0 :     if (!entry) {
     258               0 :         *_retval = nsnull;
     259               0 :         return NS_ERROR_FAILURE;    
     260                 :     }
     261                 : 
     262               0 :     return entry->GetName(_retval);
     263                 : }
     264                 : 
     265                 : static PLDHashOperator
     266               0 : xpti_ArrayAppender(const char* name, xptiInterfaceEntry* entry, void* arg)
     267                 : {
     268               0 :     nsISupportsArray* array = (nsISupportsArray*) arg;
     269                 : 
     270               0 :     nsCOMPtr<nsIInterfaceInfo> ii;
     271               0 :     if (NS_SUCCEEDED(EntryToInfo(entry, getter_AddRefs(ii))))
     272               0 :         array->AppendElement(ii);
     273               0 :     return PL_DHASH_NEXT;
     274                 : }
     275                 : 
     276                 : /* nsIEnumerator enumerateInterfaces (); */
     277               0 : NS_IMETHODIMP xptiInterfaceInfoManager::EnumerateInterfaces(nsIEnumerator **_retval)
     278                 : {
     279                 :     // I didn't want to incur the size overhead of using nsHashtable just to
     280                 :     // make building an enumerator easier. So, this code makes a snapshot of 
     281                 :     // the table using an nsISupportsArray and builds an enumerator for that.
     282                 :     // We can afford this transient cost.
     283                 : 
     284               0 :     nsCOMPtr<nsISupportsArray> array;
     285               0 :     NS_NewISupportsArray(getter_AddRefs(array));
     286               0 :     if (!array)
     287               0 :         return NS_ERROR_UNEXPECTED;
     288                 : 
     289               0 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     290               0 :     mWorkingSet.mNameTable.EnumerateRead(xpti_ArrayAppender, array);
     291                 : 
     292               0 :     return array->Enumerate(_retval);
     293                 : }
     294                 : 
     295                 : struct ArrayAndPrefix
     296                 : {
     297                 :     nsISupportsArray* array;
     298                 :     const char*       prefix;
     299                 :     PRUint32          length;
     300                 : };
     301                 : 
     302                 : static PLDHashOperator
     303          465732 : xpti_ArrayPrefixAppender(const char* keyname, xptiInterfaceEntry* entry, void* arg)
     304                 : {
     305          465732 :     ArrayAndPrefix* args = (ArrayAndPrefix*) arg;
     306                 : 
     307          465732 :     const char* name = entry->GetTheName();
     308          465732 :     if (name != PL_strnstr(name, args->prefix, args->length))
     309          335682 :         return PL_DHASH_NEXT;
     310                 : 
     311          260100 :     nsCOMPtr<nsIInterfaceInfo> ii;
     312          130050 :     if (NS_SUCCEEDED(EntryToInfo(entry, getter_AddRefs(ii))))
     313          130050 :         args->array->AppendElement(ii);
     314          130050 :     return PL_DHASH_NEXT;
     315                 : }
     316                 : 
     317                 : /* nsIEnumerator enumerateInterfacesWhoseNamesStartWith (in string prefix); */
     318             306 : NS_IMETHODIMP xptiInterfaceInfoManager::EnumerateInterfacesWhoseNamesStartWith(const char *prefix, nsIEnumerator **_retval)
     319                 : {
     320             612 :     nsCOMPtr<nsISupportsArray> array;
     321             306 :     NS_NewISupportsArray(getter_AddRefs(array));
     322             306 :     if (!array)
     323               0 :         return NS_ERROR_UNEXPECTED;
     324                 : 
     325             612 :     ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
     326             306 :     ArrayAndPrefix args = {array, prefix, PL_strlen(prefix)};
     327             306 :     mWorkingSet.mNameTable.EnumerateRead(xpti_ArrayPrefixAppender, &args);
     328                 : 
     329             306 :     return array->Enumerate(_retval);
     330                 : }
     331                 : 
     332                 : /* void autoRegisterInterfaces (); */
     333               0 : NS_IMETHODIMP xptiInterfaceInfoManager::AutoRegisterInterfaces()
     334                 : {
     335                 :     NS_TIME_FUNCTION;
     336                 : 
     337               0 :     return NS_ERROR_NOT_IMPLEMENTED;
     338                 : }
     339                 : 
     340                 : /***************************************************************************/
     341                 : 
     342                 : /* void addAdditionalManager (in nsIInterfaceInfoManager manager); */
     343               0 : NS_IMETHODIMP xptiInterfaceInfoManager::AddAdditionalManager(nsIInterfaceInfoManager *manager)
     344                 : {
     345               0 :     nsCOMPtr<nsIWeakReference> weakRef = do_GetWeakReference(manager);
     346                 :     nsISupports* ptrToAdd = weakRef ? 
     347               0 :                     static_cast<nsISupports*>(weakRef) :
     348               0 :                     static_cast<nsISupports*>(manager);
     349                 :     { // scoped lock...
     350               0 :         MutexAutoLock lock(mAdditionalManagersLock);
     351               0 :         if (mAdditionalManagers.IndexOf(ptrToAdd) != -1)
     352               0 :             return NS_ERROR_FAILURE;
     353               0 :         if (!mAdditionalManagers.AppendObject(ptrToAdd))
     354               0 :             return NS_ERROR_OUT_OF_MEMORY;
     355                 :     }
     356               0 :     return NS_OK;
     357                 : }
     358                 : 
     359                 : /* void removeAdditionalManager (in nsIInterfaceInfoManager manager); */
     360               0 : NS_IMETHODIMP xptiInterfaceInfoManager::RemoveAdditionalManager(nsIInterfaceInfoManager *manager)
     361                 : {
     362               0 :     nsCOMPtr<nsIWeakReference> weakRef = do_GetWeakReference(manager);
     363                 :     nsISupports* ptrToRemove = weakRef ? 
     364               0 :                     static_cast<nsISupports*>(weakRef) :
     365               0 :                     static_cast<nsISupports*>(manager);
     366                 :     { // scoped lock...
     367               0 :         MutexAutoLock lock(mAdditionalManagersLock);
     368               0 :         if (!mAdditionalManagers.RemoveObject(ptrToRemove))
     369               0 :             return NS_ERROR_FAILURE;
     370                 :     }
     371               0 :     return NS_OK;
     372                 : }
     373                 : 
     374                 : /* bool hasAdditionalManagers (); */
     375            7439 : NS_IMETHODIMP xptiInterfaceInfoManager::HasAdditionalManagers(bool *_retval)
     376                 : {
     377            7439 :     *_retval = mAdditionalManagers.Count() > 0;
     378            7439 :     return NS_OK;
     379                 : }
     380                 : 
     381                 : /* nsISimpleEnumerator enumerateAdditionalManagers (); */
     382               0 : NS_IMETHODIMP xptiInterfaceInfoManager::EnumerateAdditionalManagers(nsISimpleEnumerator **_retval)
     383                 : {
     384               0 :     MutexAutoLock lock(mAdditionalManagersLock);
     385                 : 
     386               0 :     nsCOMArray<nsISupports> managerArray(mAdditionalManagers);
     387                 :     /* Resolve all the weak references in the array. */
     388               0 :     for(PRInt32 i = managerArray.Count(); i--; ) {
     389               0 :         nsISupports *raw = managerArray.ObjectAt(i);
     390               0 :         if (!raw)
     391               0 :             return NS_ERROR_FAILURE;
     392               0 :         nsCOMPtr<nsIWeakReference> weakRef = do_QueryInterface(raw);
     393               0 :         if (weakRef) {
     394                 :             nsCOMPtr<nsIInterfaceInfoManager> manager = 
     395               0 :                 do_QueryReferent(weakRef);
     396               0 :             if (manager) {
     397               0 :                 if (!managerArray.ReplaceObjectAt(manager, i))
     398               0 :                     return NS_ERROR_FAILURE;
     399                 :             }
     400                 :             else {
     401                 :                 // The manager is no more. Remove the element.
     402               0 :                 mAdditionalManagers.RemoveObjectAt(i);
     403               0 :                 managerArray.RemoveObjectAt(i);
     404                 :             }
     405                 :         }
     406                 :     }
     407                 :     
     408               0 :     return NS_NewArrayEnumerator(_retval, managerArray);
     409                 : }

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