| 1 | // Copyright (C) Microsoft Corporation. All rights reserved. |
| 2 | #pragma once |
| 3 | |
| 4 | namespace p9fs { |
| 5 | |
| 6 | class IWorkItem; |
| 7 | |
| 8 | class Scheduler |
| 9 | { |
| 10 | public: |
| 11 | using Coroutine = std::coroutine_handle<>; |
| 12 | |
| 13 | struct Unblocker |
| 14 | { |
| 15 | Scheduler& m_Scheduler; |
| 16 | bool m_Run{}; |
| 17 | |
| 18 | bool await_ready() const |
| 19 | { |
| 20 | return m_Run; |
| 21 | } |
| 22 | |
| 23 | void await_suspend(Coroutine handle) |
| 24 | { |
| 25 | m_Scheduler.Schedule(handle); |
| 26 | } |
| 27 | |
| 28 | static void await_resume() |
| 29 | { |
| 30 | } |
| 31 | }; |
| 32 | |
| 33 | Scheduler(); |
| 34 | void Schedule(Coroutine coroutine) noexcept; |
| 35 | void DonateThreadAndResume(Coroutine coroutine) noexcept; |
| 36 | bool Block() noexcept; |
| 37 | struct Unblocker Unblock() noexcept; |
| 38 | |
| 39 | private: |
| 40 | void RunAndRelease() noexcept; |
| 41 | bool Claim(bool owner) noexcept; |
| 42 | void WorkerCallback() noexcept; |
| 43 | |
| 44 | std::shared_mutex m_Lock; |
| 45 | std::queue<Coroutine> m_Queue; |
| 46 | std::unique_ptr<IWorkItem> m_Work; |
| 47 | bool m_Running; |
| 48 | bool m_ThreadEnqueued; |
| 49 | static thread_local bool tls_Blocked; |
| 50 | static thread_local bool tls_SchedulerThread; |
| 51 | }; |
| 52 | |
| 53 | extern Scheduler g_Scheduler; |
| 54 | |
| 55 | } // namespace p9fs |