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The attached patch fixes a problem that I seem to have introduced 

with the new support for asynchronous NOTIFY in libpgtcl.  With
the current sources, if the backend disconnects unexpectedly then
the tcl/tk application coredumps when control next reaches the idle
loop.  Oops.

			regards, tom lane
This commit is contained in:
Bruce Momjian 1998-08-22 04:34:22 +00:00
parent a738478ad8
commit c0d730460f
1 changed files with 13 additions and 3 deletions
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16
src/interfaces/libpgtcl/pgtclId.c
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@ -12,7 +12,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclId.c,v 1.12 1998/08/17 03:50:26 scrappy Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclId.c,v 1.13 1998/08/22 04:34:22 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -475,6 +475,7 @@ static void Pg_Notify_SetupProc (ClientData clientData, int flags)
{
Pg_ConnectionId *connid = (Pg_ConnectionId *) clientData;
Tcl_File handle;
int pqsock;
/* We classify SQL notifies as Tcl file events. */
if (!(flags & TCL_FILE_EVENTS)) {
@ -482,7 +483,11 @@ static void Pg_Notify_SetupProc (ClientData clientData, int flags)
}
/* Set up to watch for asynchronous data arrival on backend channel */
handle = Tcl_GetFile((ClientData) PQsocket(connid->conn), TCL_UNIX_FD);
pqsock = PQsocket(connid->conn);
if (pqsock < 0)
return;
handle = Tcl_GetFile((ClientData) pqsock, TCL_UNIX_FD);
Tcl_WatchFile(handle, TCL_READABLE);
}
@ -492,6 +497,7 @@ static void Pg_Notify_CheckProc (ClientData clientData, int flags)
{
Pg_ConnectionId *connid = (Pg_ConnectionId *) clientData;
Tcl_File handle;
int pqsock;
/* We classify SQL notifies as Tcl file events. */
if (!(flags & TCL_FILE_EVENTS)) {
@ -503,7 +509,11 @@ static void Pg_Notify_CheckProc (ClientData clientData, int flags)
* We use Tcl_FileReady to avoid a useless kernel call
* when no data is available.
*/
handle = Tcl_GetFile((ClientData) PQsocket(connid->conn), TCL_UNIX_FD);
pqsock = PQsocket(connid->conn);
if (pqsock < 0)
return;
handle = Tcl_GetFile((ClientData) pqsock, TCL_UNIX_FD);
if (Tcl_FileReady(handle, TCL_READABLE) != 0) {
PQconsumeInput(connid->conn);
}