LCOV - code coverage report
Current view: directory - dom/workers - ChromeWorkerScope.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 37 0 0.0 %
Date: 2012-06-02 Functions: 4 0 0.0 %

       1                 : /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
       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 Web Workers.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  *   The Mozilla Foundation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2011
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Ben Turner <bent.mozilla@gmail.com> (Original Author)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "ChromeWorkerScope.h"
      40                 : 
      41                 : #include "jsapi.h"
      42                 : 
      43                 : #include "nsXPCOM.h"
      44                 : #include "nsNativeCharsetUtils.h"
      45                 : #include "nsStringGlue.h"
      46                 : 
      47                 : #include "WorkerPrivate.h"
      48                 : 
      49                 : #define CTYPES_STR "ctypes"
      50                 : 
      51                 : USING_WORKERS_NAMESPACE
      52                 : 
      53                 : namespace {
      54                 : 
      55                 : #ifdef BUILD_CTYPES
      56                 : char*
      57               0 : UnicodeToNative(JSContext* aCx, const jschar* aSource, size_t aSourceLen)
      58                 : {
      59               0 :   nsDependentString unicode(aSource, aSourceLen);
      60                 : 
      61               0 :   nsCAutoString native;
      62               0 :   if (NS_FAILED(NS_CopyUnicodeToNative(unicode, native))) {
      63               0 :     JS_ReportError(aCx, "Could not convert string to native charset!");
      64               0 :     return nsnull;
      65                 :   }
      66                 : 
      67               0 :   char* result = static_cast<char*>(JS_malloc(aCx, native.Length() + 1));
      68               0 :   if (!result) {
      69               0 :     return nsnull;
      70                 :   }
      71                 : 
      72               0 :   memcpy(result, native.get(), native.Length());
      73               0 :   result[native.Length()] = 0;
      74               0 :   return result;
      75                 : }
      76                 : 
      77                 : JSCTypesCallbacks gCTypesCallbacks = {
      78                 :   UnicodeToNative
      79                 : };
      80                 : 
      81                 : JSBool
      82               0 : CTypesLazyGetter(JSContext* aCx, JSObject* aObj, jsid aId, jsval* aVp)
      83                 : {
      84               0 :   NS_ASSERTION(JS_GetGlobalObject(aCx) == aObj, "Not a global object!");
      85               0 :   NS_ASSERTION(JSID_IS_STRING(aId), "Bad id!");
      86               0 :   NS_ASSERTION(JS_FlatStringEqualsAscii(JSID_TO_FLAT_STRING(aId), CTYPES_STR),
      87                 :                "Bad id!");
      88                 : 
      89               0 :   WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
      90               0 :   NS_ASSERTION(worker->IsChromeWorker(), "This should always be true!");
      91                 : 
      92               0 :   if (!worker->DisableMemoryReporter()) {
      93               0 :     return false;
      94                 :   }
      95                 : 
      96                 :   jsval ctypes;
      97               0 :   if (!JS_DeletePropertyById(aCx, aObj, aId) ||
      98               0 :       !JS_InitCTypesClass(aCx, aObj) ||
      99               0 :       !JS_GetPropertyById(aCx, aObj, aId, &ctypes)) {
     100               0 :     return false;
     101                 :   }
     102               0 :   JS_SetCTypesCallbacks(JSVAL_TO_OBJECT(ctypes), &gCTypesCallbacks);
     103               0 :   return JS_GetPropertyById(aCx, aObj, aId, aVp);
     104                 : }
     105                 : #endif
     106                 : 
     107                 : inline bool
     108               0 : DefineCTypesLazyGetter(JSContext* aCx, JSObject* aGlobal)
     109                 : {
     110                 : #ifdef BUILD_CTYPES
     111                 :   {
     112               0 :     JSString* ctypesStr = JS_InternString(aCx, CTYPES_STR);
     113               0 :     if (!ctypesStr) {
     114               0 :       return false;
     115                 :     }
     116                 : 
     117               0 :     jsid ctypesId = INTERNED_STRING_TO_JSID(aCx, ctypesStr);
     118                 : 
     119                 :     // We use a lazy getter here to let us unregister the blocking memory
     120                 :     // reporter since ctypes can easily block the worker thread and we can
     121                 :     // deadlock. Remove once bug 673323 is fixed.
     122               0 :     if (!JS_DefinePropertyById(aCx, aGlobal, ctypesId, JSVAL_VOID,
     123               0 :                                CTypesLazyGetter, NULL, 0)) {
     124               0 :       return false;
     125                 :     }
     126                 :   }
     127                 : #endif
     128                 : 
     129               0 :   return true;
     130                 : }
     131                 : 
     132                 : } // anonymous namespace
     133                 : 
     134                 : BEGIN_WORKERS_NAMESPACE
     135                 : 
     136                 : namespace chromeworker {
     137                 : 
     138                 : bool
     139               0 : DefineChromeWorkerFunctions(JSContext* aCx, JSObject* aGlobal)
     140                 : {
     141                 :   // Currently ctypes is the only special property given to ChromeWorkers.
     142               0 :   return DefineCTypesLazyGetter(aCx, aGlobal);
     143                 : }
     144                 : 
     145                 : } // namespace chromeworker
     146                 : 
     147                 : END_WORKERS_NAMESPACE

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