PQisBusy() always busy

It seems like PQisBusy() == 1 indefinitely after calling the asynchronous
function PQsendQueryParams().

I am using a method to check for the availability of asynchronous results
straight out of the latest PostgreSQL book by Korry and Susan Douglas. It
uses select() and then FD_ISSET on the connection socket, then calls both
PQconsumeInput() and PQisBusy().

For some reason, the value for PQisBusy() is always 1, no matter how long I
let the program run.

I'm just wondering if anyone can point me in the right direction. For what
it's worth. I'm programming in OS X 10.7 with Xcode 4.1 using the PostgreSQL
files from the EnterpriseDB one-click installer.

Here's the function:

bool is_result_ready( PGconn * connection )
{
int my_socket;
struct timeval timer;
fd_set read_mask;

if( PQisBusy( connection ) == FALSE )
return( TRUE );

my_socket = PQsocket( connection );

timer.tv_sec = (time_t)1;
timer.tv_usec = 0;

FD_ZERO( &read_mask );
FD_SET( my_socket, &read_mask );

if( select( my_socket + 1, &read_mask, NULL, NULL, &timer ) == 0 )
{
return( FALSE );
}
else if( FD_ISSET( my_socket, &read_mask ))
{
PQconsumeInput( connection );

if( PQisBusy( connection )) <------ THIS PQisBusy() ALWAYS
RETURNS 1
return( FALSE );
else
return( TRUE );
}
else
{
return( FALSE );
}
}

Thanks in advance for any insight.

Brad

--
View this message in context: http://postgresql.1045698.n5.nabble.com/PQisBusy-always-busy-tp4793847p4793847.html
Sent from the PostgreSQL - novice mailing list archive at Nabble.com.