static lazyreply *get_lazyreply(XCBConnection *c, XCBExtension *ext)
{
static pthread_mutex_t global_lock = PTHREAD_MUTEX_INITIALIZER;
static int next_global_id;
lazyreply *data;
pthread_mutex_lock(&global_lock);
if(!ext->global_id)
ext->global_id = ++next_global_id;
pthread_mutex_unlock(&global_lock);
data = _xcb_map_get(c->ext.extensions, ext->global_id);
if(!data)
{
/* cache miss: query the server */
data = malloc(sizeof(lazyreply));
if(!data)
return 0;
data->tag = LAZY_COOKIE;
data->value.cookie = XCBQueryExtension(c, strlen(ext->name), ext->name);
_xcb_map_put(c->ext.extensions, ext->global_id, data);
}
return data;
}
static int read_packet(xcb_connection_t *c)
{
xcb_generic_reply_t genrep;
int length = 32;
int eventlength = 0; /* length after first 32 bytes for GenericEvents */
void *buf;
pending_reply *pend = 0;
struct event_list *event;
/* Wait for there to be enough data for us to read a whole packet */
if(c->in.queue_len < length)
return 0;
/* Get the response type, length, and sequence number. */
memcpy(&genrep, c->in.queue, sizeof(genrep));
/* Compute 32-bit sequence number of this packet. */
if((genrep.response_type & 0x7f) != XCB_KEYMAP_NOTIFY)
{
uint64_t lastread = c->in.request_read;
c->in.request_read = (lastread & UINT64_C(0xffffffffffff0000)) | genrep.sequence;
if(XCB_SEQUENCE_COMPARE(c->in.request_read, <, lastread))
c->in.request_read += 0x10000;
if(XCB_SEQUENCE_COMPARE(c->in.request_read, >, c->in.request_expected))
c->in.request_expected = c->in.request_read;
if(c->in.request_read != lastread)
{
if(c->in.current_reply)
{
_xcb_map_put(c->in.replies, lastread, c->in.current_reply);
c->in.current_reply = 0;
c->in.current_reply_tail = &c->in.current_reply;
}
c->in.request_completed = c->in.request_read - 1;
}
while(c->in.pending_replies &&
c->in.pending_replies->workaround != WORKAROUND_EXTERNAL_SOCKET_OWNER &&
XCB_SEQUENCE_COMPARE (c->in.pending_replies->last_request, <=, c->in.request_completed))
{
pending_reply *oldpend = c->in.pending_replies;
c->in.pending_replies = oldpend->next;
if(!oldpend->next)
c->in.pending_replies_tail = &c->in.pending_replies;
free(oldpend);
}
if(genrep.response_type == XCB_ERROR)
c->in.request_completed = c->in.request_read;
}