CARD32 XCBGetMaximumRequestLength(XCBConnection *c)
{
+ if(c->has_error)
+ return 0;
pthread_mutex_lock(&c->out.reqlenlock);
if(!c->out.maximum_request_length)
{
int veclen = req->count;
enum workarounds workaround = WORKAROUND_NONE;
+ if(c->has_error)
+ return 0;
+
assert(c != 0);
assert(vector != 0);
assert(req->count > 0);
{
const XCBQueryExtensionRep *extension = XCBGetExtensionData(c, req->ext);
if(!(extension && extension->present))
+ {
+ _xcb_conn_shutdown(c);
return 0;
+ }
((CARD8 *) vector[0].iov_base)[0] = extension->major_opcode;
((CARD8 *) vector[0].iov_base)[1] = req->opcode;
}
longlen = 0;
}
else if(longlen > XCBGetMaximumRequestLength(c))
+ {
+ _xcb_conn_shutdown(c);
return 0; /* server can't take this; maybe need BIGREQUESTS? */
+ }
/* set the length field. */
((CARD16 *) vector[0].iov_base)[1] = shortlen;
flags &= ~XCB_REQUEST_RAW;
/* do we need to work around the X server bug described in glx.xml? */
- if(req->ext && !req->isvoid && strcmp(req->ext->name, "GLX") &&
- ((req->opcode == 17 && ((CARD32 *) vector[0].iov_base)[0] == 0x10004) ||
+ /* XXX: GetFBConfigs won't use BIG-REQUESTS in any sane
+ * configuration, but that should be handled here anyway. */
+ if(req->ext && !req->isvoid && !strcmp(req->ext->name, "GLX") &&
+ ((req->opcode == 17 && ((CARD32 *) vector[0].iov_base)[1] == 0x10004) ||
req->opcode == 21))
workaround = WORKAROUND_GLX_GET_FB_CONFIGS_BUG;
while(c->out.writing)
pthread_cond_wait(&c->out.cond, &c->iolock);
- if(req->isvoid && c->out.request == c->in.request_expected + (1 << 16) - 2)
+ request = ++c->out.request;
+ /* send GetInputFocus (sync) when 64k-2 requests have been sent without
+ * a reply.
+ * Also send sync (could use NoOp) at 32-bit wrap to avoid having
+ * applications see sequence 0 as that is used to indicate
+ * an error in sending the request */
+ while((req->isvoid &&
+ c->out.request == c->in.request_expected + (1 << 16) - 1) ||
+ request == 0)
{
prefix[0] = sync.packet;
- request = ++c->out.request;
_xcb_in_expect_reply(c, request, WORKAROUND_NONE, XCB_REQUEST_DISCARD_REPLY);
c->in.request_expected = c->out.request;
+ request = ++c->out.request;
}
- request = ++c->out.request;
- assert(request != 0);
if(workaround != WORKAROUND_NONE || flags != 0)
_xcb_in_expect_reply(c, request, workaround, flags);
if(!req->isvoid)
}
if(!write_block(c, vector, veclen))
+ {
+ _xcb_conn_shutdown(c);
request = 0;
+ }
pthread_mutex_unlock(&c->iolock);
return request;
}
int XCBFlush(XCBConnection *c)
{
int ret;
+ if(c->has_error)
+ return 0;
pthread_mutex_lock(&c->iolock);
ret = _xcb_out_flush_to(c, c->out.request);
pthread_mutex_unlock(&c->iolock);
int _xcb_out_flush_to(XCBConnection *c, unsigned int request)
{
- assert(request <= c->out.request);
- if(c->out.request_written >= request)
+ assert(XCB_SEQUENCE_COMPARE(request, <=, c->out.request));
+ if(XCB_SEQUENCE_COMPARE(c->out.request_written, >=, request))
return 1;
if(c->out.queue_len)
{
}
while(c->out.writing)
pthread_cond_wait(&c->out.cond, &c->iolock);
- assert(c->out.request_written >= request);
+ assert(XCB_SEQUENCE_COMPARE(c->out.request_written, >=, request));
return 1;
}