[asio-users] use coroutine and async_read_some to download data from mysql, crashed

[xilh]

dear all

I want to use coroutine and async_read_some to download data from mysql.



But I got a trouble:

when the deadline timer is expired , the application crashed.

void operator()(const error_code_t& err, std::size_t size) {

BOOST_ASIO_CORO_REENTER (*this) {

deadline_->expires_from_now(boost::posix_time::seconds(1));

deadline_->async_wait(boost::bind(&BasicSendAndRecvCo::Close, this, _1));

net_->SetPktNr(0);

BOOST_ASIO_CORO_YIELD

net_->WritePacket(sql_, sql_len_, *this);

if (err) {

LOG(ERROR) << "err:" << err;

Exit(err, 0);

return;

}

for (;;) {

data_->Extend(kMaxReadSize);

BOOST_ASIO_CORO_YIELD {

net_->socket_.async_read_some(

boost::asio::buffer(data_->read_pos(), kMaxReadSize), *this);

}




if (err) {

LOG(INFO) << "err:" << err;

Exit(err, data_->len());

return;

}

data_->len() += size;

if (complete)

break;

}

}




void Close(const boost::system::error_code& ec) {

if (ec != boost::asio::error::operation_aborted) {

net_->socket_.cancel();

}




}

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