mirror of https://gitee.com/bigwinds/arangodb
34 lines
1.0 KiB
Plaintext
34 lines
1.0 KiB
Plaintext
[/
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/ Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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/
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/ Distributed under the Boost Software License, Version 1.0. (See accompanying
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/ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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/]
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[section:Service Service requirements]
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A class is a service if it is publicly derived from another service, or if it
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is a class derived from `io_service::service` and contains a
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publicly-accessible declaration as follows:
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static io_service::id id;
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All services define a one-argument constructor that takes a reference to the
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`io_service` object that owns the service. This constructor is /explicit/,
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preventing its participation in automatic conversions. For example:
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class my_service : public io_service::service
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{
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public:
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static io_service::id id;
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explicit my_service(io_service& ios);
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private:
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virtual void shutdown_service();
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...
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};
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A service's `shutdown_service` member function must cause all copies of
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user-defined handler objects that are held by the service to be destroyed.
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[endsect]
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