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[/
/ Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
/
/ Distributed under the Boost Software License, Version 1.0. (See accompanying
/ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
/]
[section:SignalHandler Signal handler requirements]
A signal handler must meet the requirements for a [link
boost_asio.reference.Handler handler]. A value `h` of a signal handler class
should work correctly in the expression `h(ec, n)`, where `ec` is an lvalue of
type `const error_code` and `n` is an lvalue of type `const int`.
[heading Examples]
A free function as a signal handler:
void signal_handler(
const boost::system::error_code& ec,
int signal_number)
{
...
}
A signal handler function object:
struct signal_handler
{
...
void operator()(
const boost::system::error_code& ec,
int signal_number)
{
...
}
...
};
A non-static class member function adapted to a signal handler using `bind()`:
void my_class::signal_handler(
const boost::system::error_code& ec,
int signal_number)
{
...
}
...
my_signal_set.async_wait(
boost::bind(&my_class::signal_handler,
this, boost::asio::placeholders::error,
boost::asio::placeholders::signal_number));
[endsect]
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