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Measure wall-clock time instead of CPU time for “locking” indicator. (#153)

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related to https://github.com/i3/i3lock/issues/35
This commit is contained in:
Michael Stapelberg 2017-10-22 00:32:57 +02:00 committed by GitHub
parent d52cc44605
commit d3636246de
1 changed files with 25 additions and 5 deletions
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30
xcb.c
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@ -19,6 +19,7 @@
#include <assert.h>
#include <err.h>
#include <time.h>
#include <sys/time.h>
#include "cursors.h"
#include "unlock_indicator.h"
@ -172,11 +173,15 @@ void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb
xcb_grab_keyboard_cookie_t kcookie;
xcb_grab_keyboard_reply_t *kreply;
const suseconds_t screen_redraw_timeout = 100000; /* 100ms */
int tries = 10000;
/* Using few variables to trigger a redraw_screen() if too many tries */
bool redrawn = false;
time_t start = clock();
struct timeval start;
if (gettimeofday(&start, NULL) == -1) {
err(EXIT_FAILURE, "gettimeofday");
}
while (tries-- > 0) {
pcookie = xcb_grab_pointer(
@ -199,10 +204,17 @@ void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb
/* Make this quite a bit slower */
usleep(50);
/* Measure elapsed time and trigger a screen redraw if elapsed > 250000 */
struct timeval now;
if (gettimeofday(&now, NULL) == -1) {
err(EXIT_FAILURE, "gettimeofday");
}
struct timeval elapsed;
timersub(&now, &start, &elapsed);
if (!redrawn &&
(tries % 100) == 0 &&
(clock() - start) > 250000) {
elapsed.tv_usec >= screen_redraw_timeout) {
redraw_screen();
redrawn = true;
}
@ -226,10 +238,18 @@ void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb
/* Make this quite a bit slower */
usleep(50);
/* Measure elapsed time and trigger a screen redraw if elapsed > 250000 */
struct timeval now;
if (gettimeofday(&now, NULL) == -1) {
err(EXIT_FAILURE, "gettimeofday");
}
struct timeval elapsed;
timersub(&now, &start, &elapsed);
/* Trigger a screen redraw if 100ms elapsed */
if (!redrawn &&
(tries % 100) == 0 &&
(clock() - start) > 250000) {
elapsed.tv_usec >= screen_redraw_timeout) {
redraw_screen();
redrawn = true;
}