1 // Copyright 2018 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_OBJECTS_MICROTASK_H_ 6 #define V8_OBJECTS_MICROTASK_H_ 7 8 #include "src/objects/objects.h" 9 #include "src/objects/struct.h" 10 11 // Has to be the last include (doesn't have include guards): 12 #include "src/objects/object-macros.h" 13 14 namespace v8 { 15 namespace internal { 16 17 class StructBodyDescriptor; 18 19 #include "torque-generated/src/objects/microtask-tq.inc" 20 21 // Abstract base class for all microtasks that can be scheduled on the 22 // microtask queue. This class merely serves the purpose of a marker 23 // interface. 24 class Microtask : public TorqueGeneratedMicrotask<Microtask, Struct> { 25 public: 26 TQ_OBJECT_CONSTRUCTORS(Microtask) 27 }; 28 29 // A CallbackTask is a special Microtask that allows us to schedule 30 // C++ microtask callbacks on the microtask queue. This is heavily 31 // used by Blink for example. 32 class CallbackTask 33 : public TorqueGeneratedCallbackTask<CallbackTask, Microtask> { 34 public: 35 using BodyDescriptor = StructBodyDescriptor; 36 37 TQ_OBJECT_CONSTRUCTORS(CallbackTask) 38 }; 39 40 // A CallableTask is a special (internal) Microtask that allows us to 41 // schedule arbitrary callables on the microtask queue. We use this 42 // for various tests of the microtask queue. 43 class CallableTask 44 : public TorqueGeneratedCallableTask<CallableTask, Microtask> { 45 public: 46 // Dispatched behavior. 47 DECL_VERIFIER(CallableTask) 48 void BriefPrintDetails(std::ostream& os); 49 50 using BodyDescriptor = StructBodyDescriptor; 51 52 TQ_OBJECT_CONSTRUCTORS(CallableTask) 53 }; 54 55 } // namespace internal 56 } // namespace v8 57 58 #include "src/objects/object-macros-undef.h" 59 60 #endif // V8_OBJECTS_MICROTASK_H_ 61