Attachment 34536 Details for Bug 27367 – Test case

Test case

synctest.c (text/x-csrc), 1.58 KB, created by Göran Weinholt on 2010-03-29 15:32:22 UTC

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Creator: Göran Weinholt

Created: 2010-03-29 15:32:22 UTC

Size: 1.58 KB

patch

obsolete

>/* This program causes the X server to use 100% cpu. */
>/* Compile with: gcc synctest.c -o synctest -lX11 -lXext */
>
>#include <stdlib.h>
>#include <stdio.h>
>#include <X11/Xlib.h>
>#include <X11/extensions/sync.h>
>
>XSyncCounter get_servertime(Display *dpy)
>{
>    XSyncSystemCounter *counters;
>    XSyncCounter ret;
>    int i, len;
>
>    counters = XSyncListSystemCounters(dpy, &len);
>    for (i = 0; i < len; i++) {
>        if (!strcmp(counters[i].name, "SERVERTIME")) {
>            XSyncFreeSystemCounterList(counters);
>            return counters[i].counter;
>        }
>    }
>
>    printf("Couldn't find SERVERTIME\n");
>    exit(1);
>}
>
>int main(int argc, char *argv[])
>{
>    Display *dpy;
>    XEvent ev;
>    XSyncAlarm a;
>    XSyncAlarmAttributes attrs;
>    XSyncAlarmNotifyEvent *sev = (void *) &ev;
>
>    dpy = XOpenDisplay(NULL);
>    if (!dpy) {
>        printf("Couldn't connect to $DISPLAY\n");
>        exit(1);
>    }
>
>    /* Wait one second, then send one XSyncAlarmNotifyEvent per
>     * second. This works, but has the unfortunate side-effect of
>     * causing the X server to use 100% cpu. */
>    attrs.trigger.counter = get_servertime(dpy);
>    attrs.trigger.value_type = XSyncRelative;
>    attrs.trigger.test_type = XSyncPositiveComparison;
>    XSyncIntToValue(&attrs.trigger.wait_value, 1000);
>    XSyncIntToValue(&attrs.delta, 1000);
>
>    a = XSyncCreateAlarm(dpy, XSyncCACounter | XSyncCADelta | XSyncCAValue |
>                         XSyncCAValueType | XSyncCATestType,
>                         &attrs);
>    for (;;) {
>        XNextEvent(dpy, &ev);
>        printf("time=%i\n", sev->time);
>    }
>
>    return 0;
>}

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