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xcb: Add a define for some magic number

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In X11, errors look like events with response_type == 0. Using a define looks
better than just a "trust me!".

Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit is contained in:
Uli Schlachter 2011-01-04 12:29:11 +01:00
parent 8957e50632
commit 8a65279ee1
1 changed files with 4 additions and 1 deletions
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5
boilerplate/cairo-boilerplate-xcb.c
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@ -30,6 +30,9 @@
#include <assert.h>
/* Errors have response_type == 0 */
#define CAIRO_XCB_ERROR 0
static const cairo_user_data_key_t xcb_closure_key;
typedef struct _xcb_target_closure {
@ -592,7 +595,7 @@ _cairo_boilerplate_xcb_finish_surface (cairo_surface_t *surface)
return cairo_surface_status (surface);
while ((ev = xcb_poll_for_event (xtc->c)) != NULL) {
if (ev->response_type == 0 /* trust me! */) {
if (ev->response_type == CAIRO_XCB_ERROR) {
xcb_generic_error_t *error = (xcb_generic_error_t *) ev;
#if XCB_GENERIC_ERROR_HAS_MAJOR_MINOR_CODES