| 1 | /*++ |
| 2 | |
| 3 | Copyright (c) Microsoft. All rights reserved. |
| 4 | |
| 5 | Module Name: |
| 6 | |
| 7 | WSLCSessionManagerFactory.cpp |
| 8 | |
| 9 | Abstract: |
| 10 | |
| 11 | Contains the implementation for WSLCSessionManagerFactory. |
| 12 | |
| 13 | --*/ |
| 14 | |
| 15 | #include "precomp.h" |
| 16 | |
| 17 | #include "WSLCSessionManagerFactory.h" |
| 18 | #include "WSLCSessionManager.h" |
| 19 | #include "wslpolicies.h" |
| 20 | |
| 21 | using wsl::windows::service::wslc::WSLCSessionManagerFactory; |
| 22 | using wsl::windows::service::wslc::WSLCSessionManagerImpl; |
| 23 | |
| 24 | CoCreatableClassWithFactory(WSLCSessionManager, WSLCSessionManagerFactory); |
| 25 | |
| 26 | static std::mutex g_mutex; |
| 27 | static std::optional<WSLCSessionManagerImpl> g_sessionManagerImpl = std::make_optional<WSLCSessionManagerImpl>(); |
| 28 | static Microsoft::WRL::ComPtr<WSLCSessionManager> g_sessionManager; |
| 29 | |
| 30 | HRESULT WSLCSessionManagerFactory::CreateInstance(_In_ IUnknown* pUnkOuter, _In_ REFIID riid, _Out_ void** ppCreated) |
| 31 | { |
| 32 | RETURN_HR_IF_NULL(E_POINTER, ppCreated); |
| 33 | *ppCreated = nullptr; |
| 34 | |
| 35 | RETURN_HR_IF(CLASS_E_NOAGGREGATION, pUnkOuter != nullptr); |
| 36 | |
| 37 | WSL_LOG("WSLCSessionManagerFactory", TraceLoggingLevel(WINEVENT_LEVEL_VERBOSE)); |
| 38 | |
| 39 | try |
| 40 | { |
| 41 | wsl::windows::common::COMServiceExecutionContext context; |
| 42 | |
| 43 | namespace policies = wsl::windows::policies; |
| 44 | THROW_HR_WITH_USER_ERROR_IF( |
| 45 | WSLC_E_CONTAINER_DISABLED, |
| 46 | wsl::shared::Localization::MessageWSLContainerDisabled(), |
| 47 | !policies::IsFeatureAllowed(policies::OpenPoliciesKey().get(), policies::c_allowWSLContainer)); |
| 48 | |
| 49 | std::lock_guard lock{g_mutex}; |
| 50 | |
| 51 | THROW_HR_IF(CO_E_SERVER_STOPPING, !g_sessionManagerImpl.has_value()); |
| 52 | |
| 53 | if (!g_sessionManager) |
| 54 | { |
| 55 | g_sessionManager = wil::MakeOrThrow<WSLCSessionManager>(&g_sessionManagerImpl.value()); |
| 56 | } |
| 57 | |
| 58 | THROW_IF_FAILED(g_sessionManager.CopyTo(riid, ppCreated)); |
| 59 | } |
| 60 | catch (...) |
| 61 | { |
| 62 | const auto result = wil::ResultFromCaughtException(); |
| 63 | |
| 64 | // Note: S_FALSE will cause COM to retry if the service is stopping. |
| 65 | return result == CO_E_SERVER_STOPPING ? S_FALSE : result; |
| 66 | } |
| 67 | |
| 68 | return S_OK; |
| 69 | } |
| 70 | |
| 71 | void wsl::windows::service::wslc::ClearWslcSessionsAndBlockNewInstances() |
| 72 | { |
| 73 | std::lock_guard lock{g_mutex}; |
| 74 | |
| 75 | // Disconnect the COM instance from its implementation. |
| 76 | if (g_sessionManager) |
| 77 | { |
| 78 | g_sessionManager->Disconnect(); |
| 79 | g_sessionManager.Reset(); |
| 80 | |
| 81 | // N.B. Callers might still have references to the COM instance. If that's the case, calls will all fail with RPC_E_DISCONNECTED. |
| 82 | } |
| 83 | |
| 84 | g_sessionManagerImpl.reset(); |
| 85 | } |