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// Copyright 2016 The Chromium Authors
// 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_PLATFORM_BINDINGS_ACTIVE_SCRIPT_WRAPPABLE_BASE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_ACTIVE_SCRIPT_WRAPPABLE_BASE_H_
#include <type_traits>
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/platform_export.h"
namespace blink {
/**
* Classes deriving from ActiveScriptWrappable will be kept alive as long as
* they have a pending activity. Destroying the corresponding ExecutionContext
* implicitly releases them to avoid leaks.
*/
class PLATFORM_EXPORT ActiveScriptWrappableBase : public GarbageCollectedMixin {
public:
ActiveScriptWrappableBase(const ActiveScriptWrappableBase&) = delete;
ActiveScriptWrappableBase& operator=(const ActiveScriptWrappableBase&) =
delete;
virtual ~ActiveScriptWrappableBase() = default;
virtual bool IsContextDestroyed() const = 0;
// `HasPendingActivity()` overrides the lifetime of ScriptWrappable objects
// when needed. If `HasPendingActivity()` returns true and the corresponding
// ExecutionContext is not destroyed, the objects will not be reclaimed by the
// GC, even if they are otherwise unreachable.
//
// Note: These methods are queried during garbage collection and *must not*
// allocate any new objects.
virtual bool HasPendingActivity() const = 0;
protected:
ActiveScriptWrappableBase() = default;
void RegisterActiveScriptWrappable(v8::Isolate*);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_ACTIVE_SCRIPT_WRAPPABLE_BASE_H_
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