1 /*
2  * This is free and unencumbered software released into the public domain.
3  *
4  * Anyone is free to copy, modify, publish, use, compile, sell, or
5  * distribute this software, either in source code form or as a compiled
6  * binary, for any purpose, commercial or non-commercial, and by any
7  * means.
8  *
9  * In jurisdictions that recognize copyright laws, the author or authors
10  * of this software dedicate any and all copyright interest in the
11  * software to the public domain. We make this dedication for the benefit
12  * of the public at large and to the detriment of our heirs and
13  * successors. We intend this dedication to be an overt act of
14  * relinquishment in perpetuity of all present and future rights to this
15  * software under copyright law.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23  * OTHER DEALINGS IN THE SOFTWARE.
24  */
25 
26 #include "compat.h"
27 
28 #include <assert.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <unistd.h>
32 
33 #include <poll.h>
34 
35 #include "ev.h"
36 
37 int	 fired_a;
38 int	 fired_b;
39 int	 fired_c;
40 
41 struct timeval	 tv_a = { 0, 250000 };
42 struct timeval	 tv_b = { 0, 300000 };
43 struct timeval	 tv_c = { 0, 350000 };
44 
45 unsigned long	 tout_a;
46 unsigned long	 tout_b;
47 unsigned long	 tout_c;
48 
49 static void
50 pipe_ev(int fd, int ev, void *data)
51 {
52 	warn("shouldn't have happened!");
53 	abort();
54 }
55 
56 static void
57 timeout_cb(int fd, int ev, void *data)
58 {
59 	int	*d = data;
60 
61 	assert(fd == -1);
62 	*d = 1;
63 }
64 
65 static void
66 timeout_cancel_b(int fd, int ev, void *data)
67 {
68 	timeout_cb(fd, ev, data);
69 	ev_timer_cancel(tout_b);
70 }
71 
72 static void
73 timeout_quit(int fd, int ev, void *data)
74 {
75 	timeout_cb(fd, ev, data);
76 	ev_break();
77 }
78 
79 int
80 main(void)
81 {
82 	int	 p[2];
83 
84 	alarm(2); /* safety net */
85 
86 	/* the ev subsystem needs at least a file descriptor */
87 	if (pipe(p) == -1)
88 		err(1, "pipe");
89 
90 	if (ev_init() == -1)
91 		err(1, "ev_init");
92 
93 	if (ev_add(p[0], POLLIN, pipe_ev, NULL) == -1)
94 		err(1, "ev_add");
95 
96 	if ((tout_c = ev_timer(&tv_c, timeout_quit, &fired_c)) == 0 ||
97 	    (tout_b = ev_timer(&tv_b, timeout_cb, &fired_b)) == 0 ||
98 	    (tout_a = ev_timer(&tv_a, timeout_cancel_b, &fired_a)) == 0)
99 		err(1, "ev_timer");
100 
101 	ev_loop();
102 
103 	if (fired_a && !fired_b && fired_c)
104 		return 0;
105 
106 	errx(1, "events fired not as expected: a:%d b:%d c:%d",
107 	    fired_a, fired_b, fired_c);
108 }