blob: 6b719bb753de40fe98f387cffb0cfb2d55aded07 [file] [log] [blame]
/*
* Copyright 2016 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "cobalt/script/mozjs/weak_heap_object.h"
#include "cobalt/script/mozjs/mozjs_global_object_proxy.h"
namespace cobalt {
namespace script {
namespace mozjs {
WeakHeapObject::WeakHeapObject(JSContext* context, JS::HandleObject handle) {
MozjsGlobalObjectProxy* global_environment =
MozjsGlobalObjectProxy::GetFromContext(context);
Initialize(global_environment->weak_object_manager(), handle);
}
WeakHeapObject::WeakHeapObject(const WeakHeapObject& other) {
Initialize(other.weak_object_manager_, other.heap_);
}
WeakHeapObject& WeakHeapObject::operator=(const WeakHeapObject& rhs) {
Initialize(rhs.weak_object_manager_, rhs.heap_);
return *this;
}
void WeakHeapObject::Trace(JSTracer* trace) {
if (heap_) {
JS_CallHeapObjectTracer(trace, &heap_, "WeakHeapObject::Trace");
}
}
WeakHeapObject::~WeakHeapObject() {
// It's safe to call StopTracking even if StartTracking wasn't called. the
// WeakObjectManager handles the case where it's not currently tracking the
// WeakHeapObject.
weak_object_manager_->StopTracking(this);
}
void WeakHeapObject::Initialize(WeakHeapObjectManager* weak_heap_object_manager,
JSObject* object) {
weak_object_manager_ = weak_heap_object_manager;
heap_ = object;
// Don't bother registering if the pointer is already NULL.
if (heap_) {
weak_object_manager_->StartTracking(this);
}
}
} // namespace mozjs
} // namespace script
} // namespace cobalt