4f219a9f |
1 | /* |
2 | * Copyright © 2009 Christopher Eby <kreed@kreed.org> |
3 | * |
4 | * This file is part of Inertia. |
5 | * |
6 | * Inertia is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU Library General Public License as |
8 | * published by the Free Software Foundation, either version 3 of |
9 | * the License, or (at your option) any later version. |
10 | * |
11 | * Inertia is distributed in the hope that it will be useful, but |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
14 | * |
15 | * See <http://www.gnu.org/licenses/> for the full license text. |
16 | */ |
17 | |
18 | #include <stdlib.h> |
19 | #include <stdio.h> |
20 | #include <string.h> |
21 | |
22 | #include <X11/Xlib.h> |
23 | #include <X11/extensions/sync.h> |
24 | #include <X11/extensions/scrnsaver.h> |
25 | |
26 | static Display *dpy = NULL; |
27 | |
28 | static void get_alarm(XSyncAlarm *alarm, XSyncCounter counter, XSyncTestType type, XSyncValue value) |
29 | { |
30 | XSyncAlarmAttributes attrs; |
31 | |
32 | XSyncValue delta; |
33 | XSyncIntToValue(&delta, 0); |
34 | |
35 | static const unsigned long flags = XSyncCACounter | XSyncCATestType | XSyncCAValue | XSyncCADelta; |
36 | |
37 | attrs.trigger.counter = counter; |
38 | attrs.trigger.test_type = type; |
39 | attrs.trigger.wait_value = value; |
40 | attrs.delta = delta; |
41 | |
42 | if (*alarm) |
43 | XSyncChangeAlarm(dpy, *alarm, flags, &attrs); |
44 | else |
45 | *alarm = XSyncCreateAlarm(dpy, flags, &attrs); |
46 | } |
47 | |
48 | static void die(const char *errstr) |
49 | { |
50 | fputs(errstr, stderr); |
51 | fflush(stderr); |
52 | exit(EXIT_FAILURE); |
53 | } |
54 | |
55 | bool wait_for_idle_time(int idle_time) |
56 | { |
57 | static int xsync_event_base; |
58 | static XSyncAlarm idle_alarm = None; |
59 | static XSyncAlarm reset_alarm = None; |
60 | static XSyncCounter idle = None; |
61 | static XSyncValue idle_timeout; |
62 | |
63 | if (idle == None) { |
64 | if (!(dpy = XOpenDisplay(NULL))) |
65 | die("Could not open X11 display; exiting.\n"); |
66 | |
67 | int dummy; |
68 | if (!XQueryExtension(dpy, "XTEST", &dummy, &dummy, &dummy)) |
69 | die("XTEST extension not available; cannot reset idle time\n"); |
70 | |
71 | int xsync_error_base; |
72 | int xsync_major = SYNC_MAJOR_VERSION; |
73 | int xsync_minor = SYNC_MINOR_VERSION; |
74 | |
75 | if (!XSyncQueryExtension(dpy, &xsync_event_base, &xsync_error_base) || !XSyncInitialize(dpy, &xsync_major, &xsync_minor)) |
76 | die("No XSync extension; exiting.\n"); |
77 | |
78 | int i; |
79 | XSyncSystemCounter *counters = XSyncListSystemCounters(dpy, &i); |
80 | while (i--) |
81 | if (!strcmp(counters[i].name, "IDLETIME")) |
82 | idle = counters[i].counter; |
83 | XSyncFreeSystemCounterList(counters); |
84 | |
85 | if (idle == None) |
86 | die("No IDLETIME counter! xorg-server 1.3 and higher should support it. Exiting.\n"); |
87 | |
88 | XSyncIntToValue(&idle_timeout, idle_time * 1000); |
89 | get_alarm(&idle_alarm, idle, XSyncPositiveComparison, idle_timeout); |
90 | } |
91 | |
92 | XEvent ev; |
93 | |
94 | while (!XNextEvent(dpy, &ev)) { |
95 | if (ev.type == xsync_event_base + XSyncAlarmNotify) { |
96 | XSyncAlarmNotifyEvent *e = (XSyncAlarmNotifyEvent*)&ev; |
97 | |
98 | if (e->alarm == idle_alarm) { |
99 | int overflow; |
100 | XSyncValue reset_timeout; |
101 | XSyncValue minus_one; |
102 | |
103 | XSyncIntToValue(&minus_one, -1); |
104 | XSyncValueAdd(&reset_timeout, e->counter_value, minus_one, &overflow); |
105 | get_alarm(&reset_alarm, idle, XSyncNegativeComparison, reset_timeout); |
106 | |
107 | return true; |
108 | } else if (e->alarm == reset_alarm) { |
109 | get_alarm(&idle_alarm, idle, XSyncPositiveComparison, idle_timeout); |
110 | } |
111 | } |
112 | } |
113 | |
114 | return false; |
115 | } |
116 | |
117 | void reset_idle_time() |
118 | { |
119 | if (!dpy) { |
120 | if (!(dpy = XOpenDisplay(NULL))) { |
121 | fputs("Could not open X11 display.\n", stderr); |
122 | return; |
123 | } |
124 | } |
125 | |
126 | XScreenSaverSuspend(dpy, True); |
127 | XSync(dpy, False); |
128 | XScreenSaverSuspend(dpy, False); |
129 | XSync(dpy, False); |
130 | } |