d8-platforms.h

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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_D8_D8_PLATFORMS_H_
#define V8_D8_D8_PLATFORMS_H_
 
#include <cstdint>
#include <memory>
 
namespace v8 {
 
class Isolate;
class Platform;
 
// Returns a predictable v8::Platform implementation.
// Worker threads are disabled, idle tasks are disallowed, and the time reported
// by {MonotonicallyIncreasingTime} is deterministic.
std::unique_ptr<Platform> MakePredictablePlatform(
    std::unique_ptr<Platform> platform);
 
// Returns a v8::Platform implementation which randomly delays tasks (both
// foreground and background) for stress-testing different interleavings.
// If {random_seed} is 0, a random seed is chosen.
std::unique_ptr<Platform> MakeDelayedTasksPlatform(
    std::unique_ptr<Platform> platform, int64_t random_seed);
 
// We use the task queue of {kProcessGlobalPredictablePlatformWorkerTaskQueue}
// for worker tasks of the {PredictablePlatform}. At the moment, {nullptr} is a
// valid value for the isolate. If this ever changes, we either have to allocate
// a core isolate, or refactor the implementation of worker tasks in the
// {PredictablePlatform}.
constexpr Isolate* kProcessGlobalPredictablePlatformWorkerTaskQueue = nullptr;
 
}  // namespace v8
 
#endif  // V8_D8_D8_PLATFORMS_H_