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Remove dllist.c from libpq. It's overkill for what libpq needs; we can

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just stick a list-link into struct PGnotify instead.  Result is a smaller
faster and more robust library (mainly because we reduce the number of
malloc's and free's involved in notify processing), plus less pollution
of application link-symbol namespace.
This commit is contained in:
Tom Lane
2004-10-16 22:52:55 +00:00
parent b3d58ea7ec
commit cc6a90e4af
10 changed files with 44 additions and 40 deletions
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17
src/interfaces/libpq/fe-exec.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.162 2004/08/30 02:54:41 momjian Exp $
* $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.163 2004/10/16 22:52:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1323,7 +1323,6 @@ PQexecFinish(PGconn *conn)
PGnotify *
PQnotifies(PGconn *conn)
{
Dlelem *e;
PGnotify *event;
if (!conn)
@ -1332,12 +1331,14 @@ PQnotifies(PGconn *conn)
/* Parse any available data to see if we can extract NOTIFY messages. */
parseInput(conn);
/* RemHead returns NULL if list is empty */
e = DLRemHead(conn->notifyList);
if (!e)
return NULL;
event = (PGnotify *) DLE_VAL(e);
DLFreeElem(e);
event = conn->notifyHead;
if (event)
{
conn->notifyHead = event->next;
if (!conn->notifyHead)
conn->notifyTail = NULL;
event->next = NULL; /* don't let app see the internal state */
}
return event;
}