// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_OBJECTS_MICROTASK_H_
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#define V8_OBJECTS_MICROTASK_H_
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#include "src/objects.h"
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// Has to be the last include (doesn't have include guards):
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#include "src/objects/object-macros.h"
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namespace v8 {
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namespace internal {
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// Abstract base class for all microtasks that can be scheduled on the
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// microtask queue. This class merely serves the purpose of a marker
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// interface.
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class Microtask : public Struct {
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public:
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// Dispatched behavior.
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DECL_CAST(Microtask)
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DECL_VERIFIER(Microtask)
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(Microtask);
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};
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// A CallbackTask is a special Microtask that allows us to schedule
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// C++ microtask callbacks on the microtask queue. This is heavily
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// used by Blink for example.
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class CallbackTask : public Microtask {
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public:
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DECL_ACCESSORS(callback, Foreign)
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DECL_ACCESSORS(data, Foreign)
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static const int kCallbackOffset = Microtask::kHeaderSize;
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static const int kDataOffset = kCallbackOffset + kPointerSize;
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static const int kSize = kDataOffset + kPointerSize;
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// Dispatched behavior.
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DECL_CAST(CallbackTask)
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DECL_PRINTER(CallbackTask)
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DECL_VERIFIER(CallbackTask)
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(CallbackTask)
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};
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// A CallableTask is a special (internal) Microtask that allows us to
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// schedule arbitrary callables on the microtask queue. We use this
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// for various tests of the microtask queue.
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class CallableTask : public Microtask {
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public:
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DECL_ACCESSORS(callable, JSReceiver)
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DECL_ACCESSORS(context, Context)
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static const int kCallableOffset = Microtask::kHeaderSize;
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static const int kContextOffset = kCallableOffset + kPointerSize;
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static const int kSize = kContextOffset + kPointerSize;
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// Dispatched behavior.
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DECL_CAST(CallableTask)
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DECL_PRINTER(CallableTask)
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DECL_VERIFIER(CallableTask)
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void BriefPrintDetails(std::ostream& os);
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(CallableTask);
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};
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} // namespace internal
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} // namespace v8
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#include "src/objects/object-macros-undef.h"
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#endif // V8_OBJECTS_MICROTASK_H_
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