Don't use poll timeout for timing animation.

Receiving events breaks out of the poll and resets the time out.
Effectively, this blocks the animation when the client receives events.
As a quick fix, use timerfd for timing the animation.
dev
Kristian Høgsberg 16 years ago
parent 5a27f3e6a7
commit d3fa34ca29
  1. 2
      Makefile
  2. 32
      flower.c

@ -21,7 +21,7 @@ flower_objs = flower.o
pointer_objs = pointer.o
$(clients) : CFLAGS += $(shell pkg-config --cflags cairo)
$(clients) : LDLIBS += $(shell pkg-config --libs cairo)
$(clients) : LDLIBS += $(shell pkg-config --libs cairo) -lrt
define client_template
$(1): $$($(1)_objs) libwayland.so

@ -5,6 +5,8 @@
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/timerfd.h>
#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
@ -151,9 +153,10 @@ int main(int argc, char *argv[])
int fd, i, ret;
uint32_t name, mask;
cairo_surface_t *s;
struct pollfd p[1];
srandom(time(NULL));
struct pollfd p[2];
struct timespec ts;
struct itimerspec its;
uint64_t expires;
fd = open(gem_device, O_RDWR);
if (fd < 0) {
@ -171,6 +174,24 @@ int main(int argc, char *argv[])
surface = wl_display_create_surface(display);
p[1].fd = timerfd_create(CLOCK_MONOTONIC, 0);
if (p[1].fd < 0) {
fprintf(stderr, "could not create timerfd\n: %m");
return -1;
}
p[1].events = POLLIN;
clock_gettime(CLOCK_MONOTONIC, &ts);
its.it_value = ts;
its.it_interval.tv_sec = 0;
its.it_interval.tv_nsec = 20 * 1000000;
if (timerfd_settime(p[1].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
fprintf(stderr, "could not set timerfd\n: %m");
return -1;
}
srandom(ts.tv_nsec);
s = draw_stuff(width, height);
name = name_cairo_surface(fd, s);
@ -178,8 +199,9 @@ int main(int argc, char *argv[])
cairo_image_surface_get_stride(s));
i = 0;
while (ret = poll(p, 1, 20), ret >= 0) {
if (ret == 0) {
while (ret = poll(p, 2, -1), ret >= 0) {
if (p[1].revents & POLLIN) {
read(p[1].fd, &expires, sizeof expires);
wl_surface_map(surface,
x + cos(i / 30.0) * 200,
y + sin(i / 31.0) * 200,

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