使用wepoll iocp模拟epoll api,实现在windows下支持iocp (#1871)

3rdpart/wepoll/sys/epoll.cpp

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2016 The ZLToolKit project authors. All Rights Reserved.
+ *
+ * This file is part of ZLToolKit(https://github.com/ZLMediaKit/ZLToolKit).
+ *
+ * Use of this source code is governed by MIT license that can be found in the
+ * LICENSE file in the root of the source tree. All contributing project authors
+ * may be found in the AUTHORS file in the root of the source tree.
+ */
+#include "epoll.h"
+
+std::map<int, HANDLE> toolkit::s_wepollHandleMap;
+int toolkit::s_handleIndex = 0;
+std::mutex toolkit::s_handleMtx;