thrift/windows/TWinsockSingleton.h

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one
0003  * or more contributor license agreements. See the NOTICE file
0004  * distributed with this work for additional information
0005  * regarding copyright ownership. The ASF licenses this file
0006  * to you under the Apache License, Version 2.0 (the
0007  * "License"); you may not use this file except in compliance
0008  * with the License. You may obtain a copy of the License at
0009  *
0010  *   http://www.apache.org/licenses/LICENSE-2.0
0011  *
0012  * Unless required by applicable law or agreed to in writing,
0013  * software distributed under the License is distributed on an
0014  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
0015  * KIND, either express or implied. See the License for the
0016  * specific language governing permissions and limitations
0017  * under the License.
0018  */
0019
0020 #ifndef _THRIFT_TRANSPORT_WINDOWS_TWINSOCKSINGLETON_H_
0021 #define _THRIFT_TRANSPORT_WINDOWS_TWINSOCKSINGLETON_H_ 1
0022
0023 #if defined(_MSC_VER) && (_MSC_VER > 1200)
0024 #pragma once
0025 #endif // _MSC_VER
0026
0027 #ifndef _WIN32
0028 #error This is a MSVC header only.
0029 #endif
0030
0031 #include <thrift/thrift-config.h>
0032
0033 // boost
0034 #include <thrift/TNonCopyable.h>
0035
0036 #include <memory>
0037 #include <mutex>
0038
0039
0040 namespace apache {
0041 namespace thrift {
0042 namespace transport {
0043
0044 /**
0045  * Winsock2 must be intialised once only in order to create sockets. This class
0046  * performs a one time initialisation when create is called.
0047  */
0048 class TWinsockSingleton : private apache::thrift::TNonCopyable {
0049
0050 public:
0051   typedef std::shared_ptr<TWinsockSingleton> instance_ptr;
0052
0053 private:
0054   TWinsockSingleton(void);
0055
0056 public:
0057   virtual ~TWinsockSingleton(void);
0058
0059 public:
0060   static void create(void);
0061
0062 private:
0063   static void init(void);
0064
0065 private:
0066   static instance_ptr instance_ptr_;
0067   static std::once_flag flags_;
0068 };
0069 }
0070 }
0071 } // apache::thrift::transport
0072
0073 #endif // _THRIFT_TRANSPORT_WINDOWS_TWINSOCKSINGLETON_H_