/// <summary> /// Performs the asynchronous initialization for the package in cases where IDE supports AsyncPackage. /// /// This method is always called from background thread initially. /// </summary> /// <param name="asyncServiceProvider">Async service provider instance to query services asynchronously</param> /// <param name="pProfferService">Async service proffer instance</param> /// <param name="IAsyncProgressCallback">Progress callback instance</param> /// <returns></returns> public IVsTask Initialize(Microsoft.VisualStudio.Shell.Interop.COMAsyncServiceProvider.IAsyncServiceProvider asyncServiceProvider, IProfferAsyncService pProfferService, IAsyncProgressCallback pProgressCallback) { if (!isAsyncLoadSupported) { throw new InvalidOperationException("Async Initialize method should not be called when async load is not supported."); } return(ThreadHelper.JoinableTaskFactory.RunAsync <object>(async() => { await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(); IVsUIShell shellService = await asyncServiceProvider.GetServiceAsync <IVsUIShell>(typeof(SVsUIShell)); this.MainThreadInitialization(shellService, isAsyncPath: true); return null; }).AsVsTask()); }
/// <summary> /// Helper method to use async/await with IAsyncServiceProvider implementation /// </summary> /// <param name="asyncServiceProvider">IAsyncServciceProvider instance</param> /// <param name="serviceType">Type of the Visual Studio service requested</param> /// <returns>Service object as type of T</returns> public static async Task <T> GetServiceAsync <T>(this Microsoft.VisualStudio.Shell.Interop.COMAsyncServiceProvider.IAsyncServiceProvider asyncServiceProvider, Type serviceType) where T : class { T returnValue = null; await ThreadHelper.JoinableTaskFactory.RunAsync(async() => { object serviceInstance = null; Guid serviceTypeGuid = serviceType.GUID; serviceInstance = await asyncServiceProvider.QueryServiceAsync(ref serviceTypeGuid); // We have to make sure we are on main UI thread before trying to cast as underlying implementation // can be an STA COM object and doing a cast would require calling QueryInterface/AddRef marshaling // to main thread via COM. await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(); returnValue = serviceInstance as T; }); return(returnValue); }
private async Task <IVsContainedLanguageFactory?> GetContainedLanguageFactoryAsync() { Guid languageServiceId = await GetLanguageServiceIdAsync(); if (languageServiceId == Guid.Empty) { return(null); } IOleAsyncServiceProvider serviceProvider = await _serviceProvider.GetValueAsync(); object?service = await serviceProvider.QueryServiceAsync(languageServiceId); // NOTE: While this type is implemented in Roslyn, we force the cast on // the UI thread because they are free to change this to an STA object // which would result in an RPC call from a background thread. await _projectVsServices.ThreadingService.SwitchToUIThread(); return(service as IVsContainedLanguageFactory); }