/*
* Check if the remote end has closed the connection.
*/
static void
ProcessRepliesIfAny(void)
{
unsigned char firstchar;
int r;
bool received = false;
for (;;)
{
r = pq_getbyte_if_available(&firstchar);
if (r < 0)
{
/* unexpected error or EOF */
ereport(COMMERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("unexpected EOF on standby connection")));
proc_exit(0);
}
if (r == 0)
{
/* no data available without blocking */
break;
}
/* Handle the very limited subset of commands expected in this phase */
switch (firstchar)
{
/*
* 'd' means a standby reply wrapped in a CopyData packet.
*/
case 'd':
ProcessStandbyMessage();
received = true;
break;
/*
* 'X' means that the standby is closing down the socket.
*/
case 'X':
proc_exit(0);
default:
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid standby message type \"%c\"",
firstchar)));
}
}
/*
* Save the last reply timestamp if we've received at least one reply.
*/
if (received)
last_reply_timestamp = GetCurrentTimestamp();
}
/*
* Check if the remote end has closed the connection.
*/
static void
CheckClosedConnection(void)
{
unsigned char firstchar;
int r;
r = pq_getbyte_if_available(&firstchar);
if (r < 0)
{
/* unexpected error or EOF */
ereport(COMMERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("unexpected EOF on standby connection")));
proc_exit(0);
}
if (r == 0)
{
/* no data available without blocking */
return;
}
/* Handle the very limited subset of commands expected in this phase */
switch (firstchar)
{
/*
* 'X' means that the standby is closing down the socket.
*/
case 'X':
proc_exit(0);
default:
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid standby closing message type %d",
firstchar)));
}
}
