| // 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_QUEUE_H_ |
| #define V8_OBJECTS_MICROTASK_QUEUE_H_ |
| |
| #include "src/objects.h" |
| #include "src/objects/microtask.h" |
| |
| // Has to be the last include (doesn't have include guards): |
| #include "src/objects/object-macros.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class V8_EXPORT_PRIVATE MicrotaskQueue : public Struct { |
| public: |
| DECL_CAST(MicrotaskQueue) |
| DECL_VERIFIER(MicrotaskQueue) |
| DECL_PRINTER(MicrotaskQueue) |
| |
| // A FixedArray that the queued microtasks are stored. |
| // The first |pending_microtask_count| slots contains Microtask instance |
| // for each, and followings are undefined_value if any. |
| DECL_ACCESSORS2(queue, FixedArray) |
| |
| // The number of microtasks queued in |queue|. This must be less or equal to |
| // the length of |queue|. |
| DECL_INT_ACCESSORS(pending_microtask_count) |
| |
| // Enqueues |microtask| to |microtask_queue|. |
| static void EnqueueMicrotask(Isolate* isolate, |
| Handle<MicrotaskQueue> microtask_queue, |
| Handle<Microtask> microtask); |
| |
| // Runs all enqueued microtasks. |
| static void RunMicrotasks(Handle<MicrotaskQueue> microtask_queue); |
| |
| static constexpr int kMinimumQueueCapacity = 8; |
| |
| static const int kQueueOffset = HeapObject::kHeaderSize; |
| static const int kPendingMicrotaskCountOffset = kQueueOffset + kPointerSize; |
| static const int kSize = kPendingMicrotaskCountOffset + kPointerSize; |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(MicrotaskQueue); |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #include "src/objects/object-macros-undef.h" |
| |
| #endif // V8_OBJECTS_MICROTASK_QUEUE_H_ |