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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_TESTING_DEATH_AWARE_SCRIPT_WRAPPABLE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_TESTING_DEATH_AWARE_SCRIPT_WRAPPABLE_H_
#include <signal.h>
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
namespace blink {
class DeathAwareScriptWrappable;
namespace internal {
class InObjectContainer {
DISALLOW_NEW();
public:
explicit InObjectContainer(DeathAwareScriptWrappable* dependency)
: dependency_(dependency) {}
virtual ~InObjectContainer() {}
virtual void Trace(Visitor* visitor) { visitor->Trace(dependency_); }
private:
Member<DeathAwareScriptWrappable> dependency_;
};
} // namespace internal
// ScriptWrappable that can be used to
// (a) build a graph of ScriptWrappables, and
// (b) observe a single DeathAwareScriptWrappable for being garbage collected.
class DeathAwareScriptWrappable : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
static DeathAwareScriptWrappable* instance_;
static bool has_died_;
public:
typedef Member<DeathAwareScriptWrappable> Wrapper;
static bool HasDied() { return has_died_; }
static void ObserveDeathsOf(DeathAwareScriptWrappable* instance) {
has_died_ = false;
instance_ = instance;
}
DeathAwareScriptWrappable() = default;
~DeathAwareScriptWrappable() override {
if (this == instance_) {
has_died_ = true;
}
}
void Trace(Visitor* visitor) override {
visitor->Trace(wrapped_dependency_);
visitor->Trace(wrapped_vector_dependency_);
visitor->Trace(wrapped_hash_map_dependency_);
visitor->Trace(in_object_dependency_);
ScriptWrappable::Trace(visitor);
}
void SetWrappedDependency(DeathAwareScriptWrappable* dependency) {
wrapped_dependency_ = dependency;
}
void AddWrappedVectorDependency(DeathAwareScriptWrappable* dependency) {
wrapped_vector_dependency_.push_back(dependency);
}
void AddWrappedHashMapDependency(DeathAwareScriptWrappable* key,
DeathAwareScriptWrappable* value) {
wrapped_hash_map_dependency_.insert(key, value);
}
void AddInObjectDependency(DeathAwareScriptWrappable* dependency) {
in_object_dependency_.push_back(internal::InObjectContainer(dependency));
}
private:
Wrapper wrapped_dependency_;
HeapVector<Wrapper> wrapped_vector_dependency_;
HeapHashMap<Wrapper, Wrapper> wrapped_hash_map_dependency_;
HeapVector<internal::InObjectContainer> in_object_dependency_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_TESTING_DEATH_AWARE_SCRIPT_WRAPPABLE_H_
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