Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2             :  * vim: set ts=4 sw=4 et tw=80:
       3             :  *
       4             :  * This Source Code Form is subject to the terms of the Mozilla Public
       5             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       6             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       7             : 
       8             : #ifndef mozilla_jsipc_JavaScriptChild_h_
       9             : #define mozilla_jsipc_JavaScriptChild_h_
      10             : 
      11             : #include "JavaScriptBase.h"
      12             : #include "mozilla/jsipc/PJavaScriptChild.h"
      13             : 
      14             : namespace mozilla {
      15             : namespace jsipc {
      16             : 
      17             : class JavaScriptChild : public JavaScriptBase<PJavaScriptChild>
      18             : {
      19             :   public:
      20           2 :     JavaScriptChild() : strongReferenceObjIdMinimum_(0) {}
      21             :     virtual ~JavaScriptChild();
      22             : 
      23             :     bool init();
      24             :     void trace(JSTracer* trc);
      25             :     void updateWeakPointers();
      26             : 
      27             :     void drop(JSObject* obj);
      28             : 
      29           0 :     bool allowMessage(JSContext* cx) override { return true; }
      30             : 
      31             :   protected:
      32           0 :     virtual bool isParent() override { return false; }
      33             :     virtual JSObject* scopeForTargetObjects() override;
      34             : 
      35             :     mozilla::ipc::IPCResult RecvDropTemporaryStrongReferences(const uint64_t& upToObjId) override;
      36             : 
      37             :   private:
      38             :     bool fail(JSContext* cx, ReturnStatus* rs);
      39             :     bool ok(ReturnStatus* rs);
      40             : 
      41             :     // JavaScriptChild will keep strong references to JS objects that are
      42             :     // referenced by the parent only if their ID is >=
      43             :     // strongReferenceObjIdMinimum_.
      44             :     uint64_t strongReferenceObjIdMinimum_;
      45             : };
      46             : 
      47             : } // namespace jsipc
      48             : } // namespace mozilla
      49             : 
      50             : #endif