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