Commit a09bcae3 authored by Pierre d'Herbemont's avatar Pierre d'Herbemont

services_discovery/sap.: Don't wakeup more than needed.

parent 107b78a9
......@@ -277,6 +277,11 @@ struct demux_sys_t
static int Decompress( const unsigned char *psz_src, unsigned char **_dst, int i_len );
static void FreeSDP( sdp_t *p_sdp );
static inline int min( int a, int b )
{
return a > b ? b : a;
}
/*****************************************************************************
* Open: initialize and create stuff
*****************************************************************************/
......@@ -459,6 +464,7 @@ static void Run( services_discovery_t *p_sd )
{
char *psz_addr;
int i;
int timeout = -1;
/* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
* DNS queries, even if the DNS server returns an error with milliseconds.
......@@ -549,8 +555,7 @@ static void Run( services_discovery_t *p_sd )
ufd[i].revents = 0;
}
/* FIXME FIXME FIXME: short arbitrary timer */
if (poll (ufd, n, 500) > 0)
if (poll (ufd, n, timeout) > 0)
{
for (unsigned i = 0; i < n; i++)
{
......@@ -575,6 +580,10 @@ static void Run( services_discovery_t *p_sd )
mtime_t now = mdate();
/* A 1 hour timeout correspong to the RFC Implicit timeout.
* This timeout is tuned in the following loop. */
timeout = 1000 * 60 * 60;
/* Check for items that need deletion */
for( i = 0; i < p_sd->p_sys->i_announces; i++ )
{
......@@ -590,8 +599,20 @@ static void Run( services_discovery_t *p_sd )
{
RemoveAnnounce( p_sd, p_announce );
}
else
{
/* Compute next timeout */
if( p_announce->i_period_trust > 5 )
timeout = min((3 * p_announce->i_period - i_last_period) / 1000, timeout);
timeout = min((i_timeout - i_last_period)/1000, timeout);
}
}
if( !p_sd->p_sys->i_announces )
timeout = -1; /* We can safely poll indefinitly. */
else if( timeout < 200 )
timeout = 200; /* Don't wakeup too fast. */
}
}
/**********************************************************************
......
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