feat: 新增 调用上下文

Author: jianxuanbing

framework/src/Bing/Bing/Threading/CallContext.cs

@@ -0,0 +1,41 @@
+using System.Collections.Concurrent;
+using System.Threading;
+
+namespace Bing.Threading
+{
+    /// <summary>
+    /// 调用上下文
+    /// </summary>
+    public static class CallContext
+    {
+        /// <summary>
+        /// 状态字典
+        /// </summary>
+        private static readonly ConcurrentDictionary<string, AsyncLocal<object>> _state = new ConcurrentDictionary<string, AsyncLocal<object>>();
+
+        /// <summary>
+        /// 设置值
+        /// </summary>
+        /// <param name="name">键名</param>
+        /// <param name="data">数据</param>
+        public static void SetValue(string name, object data) => _state.GetOrAdd(name, _ => new AsyncLocal<object>()).Value = data;
+
+        /// <summary>
+        /// 获取值
+        /// </summary>
+        /// <param name="name">键名</param>
+        /// <returns>如果指定键名不存在，则返回 null。</returns>
+        public static object GetValue(string name) => _state.TryGetValue(name, out var data) ? data.Value : null;
+
+        /// <summary>
+        /// 移除
+        /// </summary>
+        /// <param name="name">键名</param>
+        public static void Remove(string name) => _state.TryRemove(name, out _);
+
+        /// <summary>
+        /// 清空
+        /// </summary>
+        public static void Clear() => _state.Clear();
+    }
+}