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_D8_D8_PLATFORMS_H_ 6 #define V8_D8_D8_PLATFORMS_H_ 7 8 #include <cstdint> 9 #include <memory> 10 11 namespace v8 { 12 13 class Isolate; 14 class Platform; 15 16 // Returns a predictable v8::Platform implementation. 17 // orker threads are disabled, idle tasks are disallowed, and the time reported 18 // by {MonotonicallyIncreasingTime} is deterministic. 19 std::unique_ptr<Platform> MakePredictablePlatform( 20 std::unique_ptr<Platform> platform); 21 22 // Returns a v8::Platform implementation which randomly delays tasks (both 23 // foreground and background) for stress-testing different interleavings. 24 // If {random_seed} is 0, a random seed is chosen. 25 std::unique_ptr<Platform> MakeDelayedTasksPlatform( 26 std::unique_ptr<Platform> platform, int64_t random_seed); 27 28 // We use the task queue of {kProcessGlobalPredictablePlatformWorkerTaskQueue} 29 // for worker tasks of the {PredictablePlatform}. At the moment, {nullptr} is a 30 // valid value for the isolate. If this ever changes, we either have to allocate 31 // a core isolate, or refactor the implementation of worker tasks in the 32 // {PredictablePlatform}. 33 constexpr Isolate* kProcessGlobalPredictablePlatformWorkerTaskQueue = nullptr; 34 35 } // namespace v8 36 37 #endif // V8_D8_D8_PLATFORMS_H_ 38