size_t write_some( AsyncWriteStream& s, const ConstBufferSequence& buf ) {
detail::non_blocking<AsyncWriteStream> non_blocking;
if( non_blocking(s) || non_blocking(s,true) ) {
boost::system::error_code ec;
size_t r = s.write_some( buf, ec );
if( !ec ) return r;
if( ec != boost::asio::error::would_block) {
BOOST_THROW_EXCEPTION( boost::system::system_error(ec) );
}
}
promise<size_t>::ptr p(new promise<size_t>("fc::asio::write_some"));
s.async_write_some( buf, boost::bind( detail::read_write_handler, p, _1, _2 ) );
return p->wait();
}
