зеркало из https://github.com/mozilla/gecko-dev.git
148 строки
4.4 KiB
C++
148 строки
4.4 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Web Workers.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Ben Turner <bent.mozilla@gmail.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "ChromeWorkerScope.h"
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#include "jsapi.h"
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#include "jscntxt.h"
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#include "nsXPCOM.h"
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#include "nsNativeCharsetUtils.h"
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#include "nsStringGlue.h"
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#include "WorkerPrivate.h"
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#define CTYPES_STR "ctypes"
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USING_WORKERS_NAMESPACE
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namespace {
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#ifdef BUILD_CTYPES
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char*
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UnicodeToNative(JSContext* aCx, const jschar* aSource, size_t aSourceLen)
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{
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nsDependentString unicode(aSource, aSourceLen);
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nsCAutoString native;
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if (NS_FAILED(NS_CopyUnicodeToNative(unicode, native))) {
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JS_ReportError(aCx, "Could not convert string to native charset!");
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return nsnull;
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}
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char* result = static_cast<char*>(JS_malloc(aCx, native.Length() + 1));
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if (!result) {
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return nsnull;
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}
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memcpy(result, native.get(), native.Length());
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result[native.Length()] = 0;
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return result;
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}
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JSCTypesCallbacks gCTypesCallbacks = {
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UnicodeToNative
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};
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JSBool
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CTypesLazyGetter(JSContext* aCx, JSObject* aObj, jsid aId, jsval* aVp)
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{
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NS_ASSERTION(JS_GetGlobalObject(aCx) == aObj, "Not a global object!");
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NS_ASSERTION(JSID_IS_STRING(aId), "Bad id!");
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NS_ASSERTION(JS_FlatStringEqualsAscii(JSID_TO_FLAT_STRING(aId), CTYPES_STR),
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"Bad id!");
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WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
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NS_ASSERTION(worker->IsChromeWorker(), "This should always be true!");
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if (!worker->DisableMemoryReporter()) {
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return false;
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}
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jsval ctypes;
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return JS_DeletePropertyById(aCx, aObj, aId) &&
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JS_InitCTypesClass(aCx, aObj) &&
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JS_GetPropertyById(aCx, aObj, aId, &ctypes) &&
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JS_SetCTypesCallbacks(aCx, JSVAL_TO_OBJECT(ctypes),
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&gCTypesCallbacks) &&
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JS_GetPropertyById(aCx, aObj, aId, aVp);
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}
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#endif
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inline bool
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DefineCTypesLazyGetter(JSContext* aCx, JSObject* aGlobal)
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{
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#ifdef BUILD_CTYPES
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{
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JSString* ctypesStr = JS_InternString(aCx, CTYPES_STR);
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if (!ctypesStr) {
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return false;
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}
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jsid ctypesId = INTERNED_STRING_TO_JSID(aCx, ctypesStr);
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// We use a lazy getter here to let us unregister the blocking memory
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// reporter since ctypes can easily block the worker thread and we can
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// deadlock. Remove once bug 673323 is fixed.
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if (!JS_DefinePropertyById(aCx, aGlobal, ctypesId, JSVAL_VOID,
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CTypesLazyGetter, NULL, 0)) {
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return false;
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}
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}
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#endif
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return true;
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}
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} // anonymous namespace
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BEGIN_WORKERS_NAMESPACE
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namespace chromeworker {
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bool
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DefineChromeWorkerFunctions(JSContext* aCx, JSObject* aGlobal)
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{
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// Currently ctypes is the only special property given to ChromeWorkers.
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return DefineCTypesLazyGetter(aCx, aGlobal);
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}
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} // namespace chromeworker
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END_WORKERS_NAMESPACE
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