mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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285 lines
9.3 KiB
C++
285 lines
9.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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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 Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* John Bandhauer <jband@netscape.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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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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/* Possibly shared proto object for XPCWrappedNative. */
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#include "xpcprivate.h"
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#if defined(DEBUG_xpc_hacker) || defined(DEBUG)
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PRInt32 XPCWrappedNativeProto::gDEBUG_LiveProtoCount = 0;
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#endif
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XPCWrappedNativeProto::XPCWrappedNativeProto(XPCWrappedNativeScope* Scope,
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nsIClassInfo* ClassInfo,
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PRUint32 ClassInfoFlags,
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XPCNativeSet* Set,
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QITableEntry* offsets)
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: mScope(Scope),
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mJSProtoObject(nsnull),
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mClassInfo(ClassInfo),
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mClassInfoFlags(ClassInfoFlags),
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mSet(Set),
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mSecurityInfo(nsnull),
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mScriptableInfo(nsnull),
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mOffsets(offsets)
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{
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// This native object lives as long as its associated JSObject - killed
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// by finalization of the JSObject (or explicitly if Init fails).
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MOZ_COUNT_CTOR(XPCWrappedNativeProto);
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#ifdef DEBUG
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PR_ATOMIC_INCREMENT(&gDEBUG_LiveProtoCount);
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#endif
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}
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XPCWrappedNativeProto::~XPCWrappedNativeProto()
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{
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NS_ASSERTION(!mJSProtoObject, "JSProtoObject still alive");
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MOZ_COUNT_DTOR(XPCWrappedNativeProto);
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#ifdef DEBUG
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PR_ATOMIC_DECREMENT(&gDEBUG_LiveProtoCount);
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#endif
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// Note that our weak ref to mScope is not to be trusted at this point.
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XPCNativeSet::ClearCacheEntryForClassInfo(mClassInfo);
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delete mScriptableInfo;
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}
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JSBool
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XPCWrappedNativeProto::Init(XPCCallContext& ccx,
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JSBool isGlobal,
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const XPCNativeScriptableCreateInfo* scriptableCreateInfo)
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{
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nsIXPCScriptable *callback = scriptableCreateInfo ?
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scriptableCreateInfo->GetCallback() :
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nsnull;
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if (callback) {
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mScriptableInfo =
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XPCNativeScriptableInfo::Construct(ccx, isGlobal, scriptableCreateInfo);
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if (!mScriptableInfo)
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return JS_FALSE;
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}
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js::Class* jsclazz;
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if (mScriptableInfo) {
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const XPCNativeScriptableFlags& flags(mScriptableInfo->GetFlags());
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if (flags.AllowPropModsToPrototype()) {
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jsclazz = flags.WantCall() ?
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&XPC_WN_ModsAllowed_WithCall_Proto_JSClass :
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&XPC_WN_ModsAllowed_NoCall_Proto_JSClass;
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} else {
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jsclazz = flags.WantCall() ?
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&XPC_WN_NoMods_WithCall_Proto_JSClass :
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&XPC_WN_NoMods_NoCall_Proto_JSClass;
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}
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} else {
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jsclazz = &XPC_WN_NoMods_NoCall_Proto_JSClass;
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}
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JSObject *parent = mScope->GetGlobalJSObject();
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mJSProtoObject =
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xpc_NewSystemInheritingJSObject(ccx, js::Jsvalify(jsclazz),
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mScope->GetPrototypeJSObject(),
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true, parent);
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JSBool ok = mJSProtoObject && JS_SetPrivate(ccx, mJSProtoObject, this);
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if (ok && callback) {
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nsresult rv = callback->PostCreatePrototype(ccx, mJSProtoObject);
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if (NS_FAILED(rv)) {
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JS_SetPrivate(ccx, mJSProtoObject, nsnull);
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mJSProtoObject = nsnull;
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XPCThrower::Throw(rv, ccx);
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return JS_FALSE;
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}
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}
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DEBUG_ReportShadowedMembers(mSet, nsnull, this);
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return ok;
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}
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void
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XPCWrappedNativeProto::JSProtoObjectFinalized(JSContext *cx, JSObject *obj)
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{
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NS_ASSERTION(obj == mJSProtoObject, "huh?");
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// Map locking is not necessary since we are running gc.
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if (IsShared()) {
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// Only remove this proto from the map if it is the one in the map.
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ClassInfo2WrappedNativeProtoMap* map =
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GetScope()->GetWrappedNativeProtoMap(ClassIsMainThreadOnly());
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if (map->Find(mClassInfo) == this)
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map->Remove(mClassInfo);
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}
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GetRuntime()->GetDetachedWrappedNativeProtoMap()->Remove(this);
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GetRuntime()->GetDyingWrappedNativeProtoMap()->Add(this);
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mJSProtoObject = nsnull;
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}
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void
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XPCWrappedNativeProto::SystemIsBeingShutDown(JSContext* cx)
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{
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// Note that the instance might receive this call multiple times
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// as we walk to here from various places.
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#ifdef XPC_TRACK_PROTO_STATS
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static bool DEBUG_DumpedStats = false;
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if (!DEBUG_DumpedStats) {
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printf("%d XPCWrappedNativeProto(s) alive at shutdown\n",
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gDEBUG_LiveProtoCount);
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DEBUG_DumpedStats = true;
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}
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#endif
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if (mJSProtoObject) {
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// short circuit future finalization
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JS_SetPrivate(cx, mJSProtoObject, nsnull);
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mJSProtoObject = nsnull;
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}
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}
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// static
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XPCWrappedNativeProto*
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XPCWrappedNativeProto::GetNewOrUsed(XPCCallContext& ccx,
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XPCWrappedNativeScope* Scope,
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nsIClassInfo* ClassInfo,
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const XPCNativeScriptableCreateInfo* ScriptableCreateInfo,
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JSBool ForceNoSharing,
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JSBool isGlobal,
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QITableEntry* offsets)
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{
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NS_ASSERTION(Scope, "bad param");
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NS_ASSERTION(ClassInfo, "bad param");
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AutoMarkingWrappedNativeProtoPtr proto(ccx);
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ClassInfo2WrappedNativeProtoMap* map = nsnull;
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XPCLock* lock = nsnull;
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JSBool shared;
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JSUint32 ciFlags;
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if (NS_FAILED(ClassInfo->GetFlags(&ciFlags)))
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ciFlags = 0;
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if (ciFlags & XPC_PROTO_DONT_SHARE) {
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NS_ERROR("reserved flag set!");
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ciFlags &= ~XPC_PROTO_DONT_SHARE;
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}
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if (ForceNoSharing || (ciFlags & nsIClassInfo::PLUGIN_OBJECT) ||
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(ScriptableCreateInfo &&
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ScriptableCreateInfo->GetFlags().DontSharePrototype())) {
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ciFlags |= XPC_PROTO_DONT_SHARE;
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shared = JS_FALSE;
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} else {
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shared = JS_TRUE;
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}
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if (shared) {
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JSBool mainThreadOnly = !!(ciFlags & nsIClassInfo::MAIN_THREAD_ONLY);
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map = Scope->GetWrappedNativeProtoMap(mainThreadOnly);
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lock = mainThreadOnly ? nsnull : Scope->GetRuntime()->GetMapLock();
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{ // scoped lock
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XPCAutoLock al(lock);
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proto = map->Find(ClassInfo);
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if (proto)
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return proto;
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}
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}
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AutoMarkingNativeSetPtr set(ccx);
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set = XPCNativeSet::GetNewOrUsed(ccx, ClassInfo);
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if (!set)
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return nsnull;
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proto = new XPCWrappedNativeProto(Scope, ClassInfo, ciFlags, set, offsets);
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if (!proto || !proto->Init(ccx, isGlobal, ScriptableCreateInfo)) {
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delete proto.get();
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return nsnull;
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}
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if (shared)
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{ // scoped lock
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XPCAutoLock al(lock);
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map->Add(ClassInfo, proto);
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}
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return proto;
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}
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void
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XPCWrappedNativeProto::DebugDump(PRInt16 depth)
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{
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#ifdef DEBUG
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depth-- ;
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XPC_LOG_ALWAYS(("XPCWrappedNativeProto @ %x", this));
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XPC_LOG_INDENT();
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XPC_LOG_ALWAYS(("gDEBUG_LiveProtoCount is %d", gDEBUG_LiveProtoCount));
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XPC_LOG_ALWAYS(("mScope @ %x", mScope));
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XPC_LOG_ALWAYS(("mJSProtoObject @ %x", mJSProtoObject.get()));
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XPC_LOG_ALWAYS(("mSet @ %x", mSet));
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XPC_LOG_ALWAYS(("mSecurityInfo of %x", mSecurityInfo));
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XPC_LOG_ALWAYS(("mScriptableInfo @ %x", mScriptableInfo));
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if (depth && mScriptableInfo) {
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XPC_LOG_INDENT();
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XPC_LOG_ALWAYS(("mScriptable @ %x", mScriptableInfo->GetCallback()));
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XPC_LOG_ALWAYS(("mFlags of %x", (PRUint32)mScriptableInfo->GetFlags()));
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XPC_LOG_ALWAYS(("mJSClass @ %x", mScriptableInfo->GetJSClass()));
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XPC_LOG_OUTDENT();
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}
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XPC_LOG_OUTDENT();
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#endif
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}
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