![]() |
Home | Libraries | People | FAQ | More |
A write handler must meet the requirements for a handler.
A value h of a write handler class should work correctly in
the expression h(ec, s), where ec is an lvalue
of type const error_code and s is an lvalue of
type const size_t.
A free function as a write handler:
void write_handler(
const boost::system::error_code& ec,
std::size_t bytes_transferred)
{
...
}
A write handler function object:
struct write_handler
{
...
void operator()(
const boost::system::error_code& ec,
std::size_t bytes_transferred)
{
...
}
...
};
A lambda as a write handler:
socket.async_write(...
[](const boost::system::error_code& ec,
std::size_t bytes_transferred)
{
...
});
A non-static class member function adapted to a write handler using std::bind():
void my_class::write_handler(
const boost::system::error_code& ec,
std::size_t bytes_transferred)
{
...
}
...
socket.async_write(...,
std::bind(&my_class::write_handler,
this, std::placeholders::_1,
std::placeholders::_2));
A non-static class member function adapted to a write handler using boost::bind():
void my_class::write_handler(
const boost::system::error_code& ec,
std::size_t bytes_transferred)
{
...
}
...
socket.async_write(...,
boost::bind(&my_class::write_handler,
this, boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));