dom/ipc/JSOracleChild.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/JSOracleChild.h"
   8
   9 #include "mozilla/ClearOnShutdown.h"
  10 #include "mozilla/dom/JSValidatorChild.h"
  11 #include "mozilla/dom/PJSValidatorChild.h"
  12 #include "mozilla/ipc/Endpoint.h"
  13
  14 using namespace mozilla::dom;
  15
  16 static mozilla::StaticRefPtr<JSOracleChild> sOracleSingletonChild;
  17
  18 static mozilla::StaticAutoPtr<JSFrontendContextHolder> sJSFrontendContextHolder;
  19
  20 /* static */
  21 void JSFrontendContextHolder::MaybeInit() {
  22   if (!sJSFrontendContextHolder) {
  23     sJSFrontendContextHolder = new JSFrontendContextHolder();
  24     ClearOnShutdown(&sJSFrontendContextHolder);
  25   }
  26 }
  27
  28 /* static */
  29 JS::FrontendContext* JSOracleChild::JSFrontendContext() {
  30   MOZ_ASSERT(sJSFrontendContextHolder);
  31   return sJSFrontendContextHolder->mFc;
  32 }
  33
  34 JSOracleChild* JSOracleChild::GetSingleton() {
  35   MOZ_ASSERT(NS_IsMainThread());
  36   if (!sOracleSingletonChild) {
  37     sOracleSingletonChild = new JSOracleChild();
  38     ClearOnShutdown(&sOracleSingletonChild);
  39   }
  40   return sOracleSingletonChild;
  41 }
  42
  43 already_AddRefed<PJSValidatorChild> JSOracleChild::AllocPJSValidatorChild() {
  44   return MakeAndAddRef<JSValidatorChild>();
  45 }
  46
  47 void JSOracleChild::Start(Endpoint<PJSOracleChild>&& aEndpoint) {
  48   DebugOnly<bool> ok = std::move(aEndpoint).Bind(this);
  49   JSFrontendContextHolder::MaybeInit();
  50   MOZ_ASSERT(ok);
  51 }