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Drop trigger messages on high load

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git-svn-id: svn://code.dyne.org/veejay/trunk@286 eb8d1916-c9e9-0310-b8de-cf0c9472ead5
This commit is contained in:
Niels Elburg
2005-04-11 01:22:52 +00:00
parent 70e49a38e1
commit c20b0ee039
3 changed files with 151 additions and 18 deletions
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143
veejay-current/libvjnet/vj-server.c
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@@ -441,6 +441,107 @@ int vj_server_poll(vj_server * vje)
return 0;
}
static int _vj_server_empty_queue(vj_server *vje, int link_id)
{
// ensure message queue is empty!!
int num_msg = 0;
vj_link **Link = (vj_link**) vje->link;
vj_message **v = Link[link_id]->m_queue;
int i;
for( i = 0; i < VJ_MAX_PENDING_MSG; i ++ )
{
if( v[i]->msg )
free(v[i]->msg);
v[i]->msg = NULL;
v[i]->len = 0;
}
Link[link_id]->n_queued = 0;
Link[link_id]->n_retrieved = 0;
return 1;
}
static int _vj_parse_highpriority_msg(vj_server *vje,int link_id, char *buf, int buf_len )
{
int nmsgs = 0;
int i = 0;
char *s = buf;
int num_msg = 0;
vj_link **Link = (vj_link**) vje->link;
vj_message **v = Link[link_id]->m_queue;
while( i < buf_len )
{
while( s[i] != 'V' && s[i+4] != 'D' )
i ++ ;
if( s[i] == 'V' && s[i+4] == 'D' )
{ // found message
char tmp_len[4];
char net_id[4];
int strlen = 0;
int netid = 0;
bzero(tmp_len,4);
bzero(net_id,4 );
strncpy( tmp_len, s + (i + 1 ), 3 );
if(sscanf(tmp_len,"%03d", &strlen))
{
i += 5;
strncpy( net_id, s + i , 3 );
if(sscanf(net_id, "%03d", &netid ))
{
if(netid >= 255 )
{
v[num_msg]->len = strlen;
v[num_msg]->msg = (char*)strndup( s + i , strlen );
num_msg ++;
if(num_msg == VJ_MAX_PENDING_MSG )
return num_msg; // cant take more
}
}
i += strlen;
}
else
{
i ++;
}
}
}
return num_msg;
}
static int _vj_get_n_msg_waiting(char *buf, int buf_len, int *offset )
{
int nmsgs = 0;
int i = 0;
char *s = buf;
while( i < buf_len )
{
while( s[i] != 'V' && s[i+4] != 'D' )
i ++ ;
if( s[i] == 'V' && s[i+4] == 'D' )
{ // found message
char tmp_len[4];
int strlen = 0;
bzero(tmp_len,4);
strncpy( tmp_len, s + (i + 1 ), 3 );
if(sscanf(tmp_len,"%03d", &strlen))
nmsgs++;
i += 5;
i += strlen;
if( nmsgs >= VJ_MAX_PENDING_MSG )
{
*offset = i;
return VJ_MAX_PENDING_MSG;
}
}
}
return nmsgs;
}
int _vj_server_parse_msg( vj_server *vje,int link_id, char *buf, int buf_len )
{
int i = 0;
@@ -460,12 +561,15 @@ int _vj_server_parse_msg( vj_server *vje,int link_id, char *buf, int buf_len )
if( n == 1)
{
i += 5; // skip header
while( (v[num_msg]->len > 0 ) || v[num_msg]->msg != NULL )
num_msg ++;
if(num_msg == VJ_MAX_PENDING_MSG)
return VJ_MAX_PENDING_MSG;
v[num_msg]->len = len;
if(v[num_msg]->msg != NULL)
free( v[num_msg]->msg );
v[num_msg]->msg = (char*)strndup( buf + i , len );
i += len;
num_msg ++;
}
@@ -558,7 +662,36 @@ int vj_server_update( vj_server *vje, int id )
}
}
return _vj_server_parse_msg( vje, id, vje->recv_buf,n );
// return _vj_server_parse_msg( vje, id, vje->recv_buf,n );
// ensure all is empty
_vj_server_empty_queue(vje, id);
char *tmp_buf = vje->recv_buf;
int bytes_left = n;
int skip_bytes = 0;
while( bytes_left > 0 )
{
int n_msg = _vj_get_n_msg_waiting( tmp_buf, bytes_left, &skip_bytes );
if( n_msg >= VJ_MAX_PENDING_MSG)
{
// cant skip all!
int hmsg = _vj_parse_highpriority_msg( vje, id,tmp_buf, skip_bytes );
if(hmsg == VJ_MAX_PENDING_MSG)
{
veejay_msg(VEEJAY_MSG_ERROR, "Link %d is acting very sucispous !", id);
return VJ_MAX_PENDING_MSG;
}
bzero( tmp_buf, skip_bytes );
tmp_buf += skip_bytes;
bytes_left -= skip_bytes;
}
else
{
return _vj_server_parse_msg( vje, id, tmp_buf, bytes_left );
}
}
return 0;
}
void vj_server_shutdown(vj_server *vje)
{