105 lines
3.2 KiB
C#
105 lines
3.2 KiB
C#
/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Threading.Tasks;
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namespace dnSpy.Contracts.Debugger.DotNet.Evaluation {
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/// <summary>
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/// Invokes code on another thread.
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/// </summary>
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public abstract class DbgDotNetDispatcher {
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/// <summary>
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/// Throws if the current thread isn't the dispatcher thread
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/// </summary>
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public void VerifyAccess() {
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if (!CheckAccess())
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throw new InvalidOperationException("Wrong dispatcher thread");
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}
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/// <summary>
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/// Checks whether the current thread is the dispatcher thread
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/// </summary>
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/// <returns></returns>
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public abstract bool CheckAccess();
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/// <summary>
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/// Executes code asynchronously on the dispatcher thread. This method returns immediately even if
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/// it happens to be called on the dispatcher thread.
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/// </summary>
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/// <param name="callback">Code to execute</param>
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public abstract void BeginInvoke(Action callback);
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/// <summary>
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/// Executes code asynchronously on the dispatcher thread. This method returns immediately even if
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/// it happens to be called on the dispatcher thread.
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/// </summary>
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/// <param name="callback">Code to execute</param>
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/// <returns></returns>
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public bool TryBeginInvoke(Action callback) {
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try {
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BeginInvoke(callback);
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return true;
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}
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catch (TaskCanceledException) {
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return false;
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}
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}
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/// <summary>
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/// Executes code on the dispatcher thread
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/// </summary>
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/// <typeparam name="T">Return type</typeparam>
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/// <param name="callback">Code to execute</param>
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/// <returns></returns>
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public abstract T Invoke<T>(Func<T> callback);
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/// <summary>
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/// Executes code on the dispatcher thread
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/// </summary>
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/// <typeparam name="T">Return type</typeparam>
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/// <param name="callback">Code to execute</param>
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/// <param name="result">Result if successful</param>
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/// <returns></returns>
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public bool TryInvoke<T>(Func<T> callback, out T result) {
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try {
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result = Invoke(callback);
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return true;
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}
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catch (TaskCanceledException) {
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result = default!;
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return false;
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}
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}
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/// <summary>
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/// Executes code on the dispatcher thread
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/// </summary>
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/// <param name="callback">Code to execute</param>
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public void Invoke(Action callback) => Invoke<object?>(() => { callback(); return null; });
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/// <summary>
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/// Executes code on the dispatcher thread
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/// </summary>
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/// <param name="callback">Code to execute</param>
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/// <returns></returns>
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public bool TryInvoke(Action callback) => TryInvoke<object?>(() => { callback(); return null; }, out _);
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}
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}
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