1 //
2 // io_service_pool.hpp
3 // ~~~~~~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6 //
7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9 //
10 
11 #ifndef HTTP_SERVER_IO_SERVICE_POOL_HPP
12 #define HTTP_SERVER_IO_SERVICE_POOL_HPP
13 
14 #include <asio.hpp>
15 #include <vector>
16 #include <boost/noncopyable.hpp>
17 #include <boost/shared_ptr.hpp>
18 
19 namespace http {
20 namespace server {
21 
22 /// A pool of io_service objects.
23 class io_service_pool
24   : private boost::noncopyable
25 {
26 public:
27   /// Construct the io_service pool.
28   explicit io_service_pool(std::size_t pool_size);
29 
30   /// Run all io_service objects in the pool.
31   void run();
32 
33   /// Stop all io_service objects in the pool.
34   void stop();
35 
36   /// Get an io_service to use.
37   asio::io_service& get_io_service();
38 
39 private:
40   typedef boost::shared_ptr<asio::io_service> io_service_ptr;
41   typedef boost::shared_ptr<asio::io_service::work> work_ptr;
42 
43   /// The pool of io_services.
44   std::vector<io_service_ptr> io_services_;
45 
46   /// The work that keeps the io_services running.
47   std::vector<work_ptr> work_;
48 
49   /// The next io_service to use for a connection.
50   std::size_t next_io_service_;
51 };
52 
53 } // namespace server
54 } // namespace http
55 
56 #endif // HTTP_SERVER_IO_SERVICE_POOL_HPP
57