int lc_bus_data_in_buffer(amqp_connection_state_t *conn)
{
return amqp_frames_enqueued(*conn) ||
amqp_data_in_buffer(*conn);
}
bool ChannelImpl::GetNextFrameFromBroker(amqp_frame_t& frame, boost::chrono::microseconds timeout)
{
int socketno = amqp_get_sockfd(m_connection);
start:
// Possibly set a timeout on receiving
if (timeout != boost::chrono::microseconds::max() && !amqp_frames_enqueued(m_connection) && !amqp_data_in_buffer(m_connection))
{
struct timeval tv_timeout;
memset(&tv_timeout, 0, sizeof(tv_timeout));
// boost::chrono::seconds.count() returns boost::int_atleast64_t,
// long can be 32 or 64 bit depending on the platform/arch
// unless the timeout is something absurd cast to long will be ok, but
// lets guard against the case where someone does something silly
assert(boost::chrono::duration_cast<boost::chrono::seconds>(timeout).count() <
static_cast<boost::chrono::seconds::rep>(std::numeric_limits<long>::max()));
tv_timeout.tv_sec = static_cast<long>(boost::chrono::duration_cast<boost::chrono::seconds>(timeout).count());
tv_timeout.tv_usec = static_cast<long>((timeout - boost::chrono::seconds(tv_timeout.tv_sec)).count());
fd_set fds;
FD_ZERO(&fds);
FD_SET(static_cast<unsigned int>(socketno), &fds);
int select_return = select(socketno + 1, &fds, NULL, &fds, &tv_timeout);
if (select_return == 0) // If it times out, return
{
return false;
}
else if (select_return == -1)
{
// If its an interupted system call just try again
if (errno == EINTR)
{
goto start;
}
else
{
std::string error_string("error calling select on socket: ");
#ifdef HAVE_STRERROR_S
const int BUFFER_LENGTH = 256;
char error_string_buffer[BUFFER_LENGTH] = {0};
strerror_s(error_string_buffer, errno);
error_string += error_string_buffer;
#elif defined(HAVE_STRERROR_R)
const int BUFFER_LENGTH = 256;
char error_string_buffer[BUFFER_LENGTH] = {0};
strerror_r(errno, error_string_buffer, BUFFER_LENGTH);
error_string += error_string_buffer;
#else
error_string += strerror(errno);
#endif
throw std::runtime_error(error_string.c_str());
}
}
}
CheckForError(amqp_simple_wait_frame(m_connection, &frame));
return true;
}
