| 1 | /*++ |
| 2 | |
| 3 | Copyright (c) Microsoft. All rights reserved. |
| 4 | |
| 5 | Module Name: |
| 6 | |
| 7 | IORelay.h |
| 8 | |
| 9 | Abstract: |
| 10 | |
| 11 | Contains the definition of the IORelay class. |
| 12 | |
| 13 | --*/ |
| 14 | |
| 15 | #pragma once |
| 16 | |
| 17 | namespace wsl::windows::service::wslc { |
| 18 | |
| 19 | class IORelay |
| 20 | { |
| 21 | |
| 22 | public: |
| 23 | NON_COPYABLE(IORelay); |
| 24 | |
| 25 | IORelay(); |
| 26 | ~IORelay(); |
| 27 | |
| 28 | void AddHandles(std::vector<std::unique_ptr<common::io::OverlappedIOHandle>>&& Handles); |
| 29 | void AddHandle(std::unique_ptr<common::io::OverlappedIOHandle>&& Handle); |
| 30 | |
| 31 | void Stop(); |
| 32 | |
| 33 | // Returns true if the calling thread is the IORelay's own worker thread (i.e. the call |
| 34 | // is being made from a handle callback). Destroying the IORelay from this thread would |
| 35 | // join the thread with itself and call std::terminate(), so callers that may run on the |
| 36 | // relay thread must check this before destroying the object. |
| 37 | bool IsRelayThread() const noexcept; |
| 38 | |
| 39 | private: |
| 40 | void Start(); |
| 41 | void Run(); |
| 42 | |
| 43 | std::mutex m_pendingHandlesLock; |
| 44 | wil::unique_event m_refreshEvent{wil::EventOptions::None}; |
| 45 | std::vector<std::unique_ptr<common::io::OverlappedIOHandle>> m_pendingHandles; |
| 46 | |
| 47 | std::thread m_thread; |
| 48 | std::atomic<bool> m_exit = false; |
| 49 | }; |
| 50 | |
| 51 | } // namespace wsl::windows::service::wslc |