static int set_fd_flags(const int fd)
{
- long flags = fcntl(fd, F_GETFL, 0);
+ int flags = fcntl(fd, F_GETFL, 0);
if(flags == -1)
return 0;
flags |= O_NONBLOCK;
return 1;
}
+static int _xcb_xlib_init(_xcb_xlib *xlib)
+{
+ xlib->lock = 0;
+#ifndef NDEBUG
+ xlib->sloppy_lock = (getenv("LIBXCB_ALLOW_SLOPPY_LOCK") != 0);
+#endif
+ pthread_cond_init(&xlib->cond, 0);
+ return 1;
+}
+
+static void _xcb_xlib_destroy(_xcb_xlib *xlib)
+{
+ pthread_cond_destroy(&xlib->cond);
+}
+
static int write_setup(xcb_connection_t *c, xcb_auth_info_t *auth_info)
{
static const char pad[3];
if(!(
set_fd_flags(fd) &&
pthread_mutex_init(&c->iolock, 0) == 0 &&
+ _xcb_xlib_init(&c->xlib) &&
_xcb_in_init(&c->in) &&
_xcb_out_init(&c->out) &&
write_setup(c, auth_info) &&
close(c->fd);
pthread_mutex_destroy(&c->iolock);
+ _xcb_xlib_destroy(&c->xlib);
_xcb_in_destroy(&c->in);
_xcb_out_destroy(&c->out);
void _xcb_lock_io(xcb_connection_t *c)
{
pthread_mutex_lock(&c->iolock);
+ while(c->xlib.lock)
+ {
+ if(pthread_equal(c->xlib.thread, pthread_self()))
+ break;
+ pthread_cond_wait(&c->xlib.cond, &c->iolock);
+ }
}
void _xcb_unlock_io(xcb_connection_t *c)
pthread_mutex_unlock(&c->iolock);
}
+void _xcb_wait_io(xcb_connection_t *c, pthread_cond_t *cond)
+{
+ int xlib_locked = c->xlib.lock;
+ if(xlib_locked)
+ {
+ c->xlib.lock = 0;
+ pthread_cond_broadcast(&c->xlib.cond);
+ }
+ pthread_cond_wait(cond, &c->iolock);
+ if(xlib_locked)
+ {
+ while(c->xlib.lock)
+ pthread_cond_wait(&c->xlib.cond, &c->iolock);
+ c->xlib.lock = 1;
+ c->xlib.thread = pthread_self();
+ }
+}
+
int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vector, int *count)
{
- int ret;
+ int ret, xlib_locked;
fd_set rfds, wfds;
/* If the thing I should be doing is already being done, wait for it. */
if(count ? c->out.writing : c->in.reading)
{
- pthread_cond_wait(cond, &c->iolock);
+ _xcb_wait_io(c, cond);
return 1;
}
++c->out.writing;
}
+ xlib_locked = c->xlib.lock;
+ if(xlib_locked)
+ {
+ c->xlib.lock = 0;
+ pthread_cond_broadcast(&c->xlib.cond);
+ }
_xcb_unlock_io(c);
do {
ret = select(c->fd + 1, &rfds, &wfds, 0, 0);
ret = 0;
}
_xcb_lock_io(c);
+ if(xlib_locked)
+ {
+ c->xlib.lock = 1;
+ c->xlib.thread = pthread_self();
+ }
if(ret)
{