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Don't explicitly close() the session socket during backend exit; instead

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leave it for the kernel to do after the process dies.  This allows clients
to wait for the backend to exit if they wish (after sending X message,
wait till EOF is detected on the socket).
This commit is contained in:
Tom Lane 2003-05-29 19:15:34 +00:00
parent 9f47c4cc5c
commit 268313a95b
1 changed files with 18 additions and 3 deletions
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21
src/backend/libpq/pqcomm.c
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@ -30,7 +30,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/libpq/pqcomm.c,v 1.153 2003/05/15 16:35:28 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/libpq/pqcomm.c,v 1.154 2003/05/29 19:15:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -149,9 +149,17 @@ pq_close(void)
{
if (MyProcPort != NULL)
{
/* Cleanly shut down SSL layer */
secure_close(MyProcPort);
closesocket(MyProcPort->sock);
/* make sure any subsequent attempts to do I/O fail cleanly */
/*
* Formerly we did an explicit close() here, but it seems better
* to leave the socket open until the process dies. This allows
* clients to perform a "synchronous close" if they care --- wait
* till the transport layer reports connection closure, and you
* can be sure the backend has exited.
*
* We do set sock to -1 to prevent any further I/O, though.
*/
MyProcPort->sock = -1;
}
}
@ -470,6 +478,13 @@ StreamConnection(int server_fd, Port *port)
/*
* StreamClose -- close a client/backend connection
*
* NOTE: this is NOT used to terminate a session; it is just used to release
* the file descriptor in a process that should no longer have the socket
* open. (For example, the postmaster calls this after passing ownership
* of the connection to a child process.) It is expected that someone else
* still has the socket open. So, we only want to close the descriptor,
* we do NOT want to send anything to the far end.
*/
void
StreamClose(int sock)