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fd38203a LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include "sd-event.h" | |
23 | #include "log.h" | |
24 | #include "util.h" | |
25 | ||
26 | static int prepare_handler(sd_event_source *s, void *userdata) { | |
27 | log_info("preparing %c", PTR_TO_INT(userdata)); | |
28 | return 1; | |
29 | } | |
30 | ||
31 | static bool got_a, got_b, got_c; | |
9ec9694c | 32 | static unsigned got_d; |
fd38203a LP |
33 | |
34 | static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
35 | ||
36 | log_info("got IO on %c", PTR_TO_INT(userdata)); | |
37 | ||
38 | if (userdata == INT_TO_PTR('a')) { | |
baf76283 | 39 | assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0); |
fd38203a LP |
40 | assert_se(!got_a); |
41 | got_a = true; | |
42 | } else if (userdata == INT_TO_PTR('b')) { | |
43 | assert_se(!got_b); | |
44 | got_b = true; | |
9ec9694c DS |
45 | } else if (userdata == INT_TO_PTR('d')) { |
46 | got_d++; | |
47 | if (got_d < 2) | |
48 | assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0); | |
49 | else | |
50 | assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0); | |
fd38203a LP |
51 | } else |
52 | assert_not_reached("Yuck!"); | |
53 | ||
54 | return 1; | |
55 | } | |
56 | ||
57 | static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
58 | ||
59 | assert(s); | |
60 | assert(si); | |
61 | ||
62 | log_info("got child on %c", PTR_TO_INT(userdata)); | |
63 | ||
64 | assert(userdata == INT_TO_PTR('f')); | |
65 | ||
adcc4ca3 | 66 | assert_se(sd_event_request_quit(sd_event_source_get_event(s)) >= 0); |
fd38203a LP |
67 | sd_event_source_unref(s); |
68 | ||
69 | return 1; | |
70 | } | |
71 | ||
72 | static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { | |
73 | sd_event_source *p; | |
74 | sigset_t ss; | |
75 | pid_t pid; | |
76 | ||
77 | assert(s); | |
78 | assert(si); | |
79 | ||
80 | log_info("got signal on %c", PTR_TO_INT(userdata)); | |
81 | ||
82 | assert(userdata == INT_TO_PTR('e')); | |
83 | ||
84 | assert_se(sigemptyset(&ss) >= 0); | |
85 | assert_se(sigaddset(&ss, SIGCHLD) >= 0); | |
86 | assert_se(sigprocmask(SIG_BLOCK, &ss, NULL) >= 0); | |
87 | ||
88 | pid = fork(); | |
89 | assert_se(pid >= 0); | |
90 | ||
91 | if (pid == 0) | |
92 | _exit(0); | |
93 | ||
adcc4ca3 | 94 | assert_se(sd_event_add_child(sd_event_source_get_event(s), pid, WEXITED, child_handler, INT_TO_PTR('f'), &p) >= 0); |
baf76283 | 95 | assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
96 | |
97 | sd_event_source_unref(s); | |
98 | ||
99 | return 1; | |
100 | } | |
101 | ||
102 | static int defer_handler(sd_event_source *s, void *userdata) { | |
103 | sd_event_source *p; | |
104 | sigset_t ss; | |
105 | ||
106 | assert(s); | |
107 | ||
108 | log_info("got defer on %c", PTR_TO_INT(userdata)); | |
109 | ||
110 | assert(userdata == INT_TO_PTR('d')); | |
111 | ||
112 | assert_se(sigemptyset(&ss) >= 0); | |
113 | assert_se(sigaddset(&ss, SIGUSR1) >= 0); | |
114 | assert_se(sigprocmask(SIG_BLOCK, &ss, NULL) >= 0); | |
adcc4ca3 | 115 | assert_se(sd_event_add_signal(sd_event_source_get_event(s), SIGUSR1, signal_handler, INT_TO_PTR('e'), &p) >= 0); |
baf76283 | 116 | assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
117 | raise(SIGUSR1); |
118 | ||
119 | sd_event_source_unref(s); | |
120 | ||
121 | return 1; | |
122 | } | |
123 | ||
124 | static bool do_quit = false; | |
125 | ||
126 | static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
127 | log_info("got timer on %c", PTR_TO_INT(userdata)); | |
128 | ||
129 | if (userdata == INT_TO_PTR('c')) { | |
130 | ||
131 | if (do_quit) { | |
132 | sd_event_source *p; | |
133 | ||
adcc4ca3 | 134 | assert_se(sd_event_add_defer(sd_event_source_get_event(s), defer_handler, INT_TO_PTR('d'), &p) >= 0); |
baf76283 | 135 | assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
136 | } else { |
137 | assert(!got_c); | |
138 | got_c = true; | |
139 | } | |
140 | } else | |
141 | assert_not_reached("Huh?"); | |
142 | ||
143 | return 2; | |
144 | } | |
145 | ||
da7e457c LP |
146 | static bool got_quit = false; |
147 | ||
148 | static int quit_handler(sd_event_source *s, void *userdata) { | |
149 | log_info("got quit handler on %c", PTR_TO_INT(userdata)); | |
150 | ||
151 | got_quit = true; | |
152 | ||
153 | return 3; | |
154 | } | |
155 | ||
fd38203a LP |
156 | int main(int argc, char *argv[]) { |
157 | sd_event *e = NULL; | |
9ec9694c | 158 | sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL; |
fd38203a | 159 | static const char ch = 'x'; |
9ec9694c | 160 | int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}; |
fd38203a LP |
161 | |
162 | assert_se(pipe(a) >= 0); | |
163 | assert_se(pipe(b) >= 0); | |
9ec9694c | 164 | assert_se(pipe(d) >= 0); |
fd38203a | 165 | |
afc6adb5 | 166 | assert_se(sd_event_default(&e) >= 0); |
fd38203a | 167 | |
9ec9694c DS |
168 | got_a = false, got_b = false, got_c = false, got_d = 0; |
169 | ||
170 | /* Add a oneshot handler, trigger it, re-enable it, and trigger | |
171 | * it again. */ | |
172 | assert_se(sd_event_add_io(e, d[0], EPOLLIN, io_handler, INT_TO_PTR('d'), &w) >= 0); | |
173 | assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0); | |
174 | assert_se(write(d[1], &ch, 1) >= 0); | |
175 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
176 | assert_se(got_d == 1); | |
177 | assert_se(write(d[1], &ch, 1) >= 0); | |
178 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
179 | assert_se(got_d == 2); | |
fd38203a LP |
180 | |
181 | assert_se(sd_event_add_io(e, a[0], EPOLLIN, io_handler, INT_TO_PTR('a'), &x) >= 0); | |
182 | assert_se(sd_event_add_io(e, b[0], EPOLLIN, io_handler, INT_TO_PTR('b'), &y) >= 0); | |
c2ba3ad6 | 183 | assert_se(sd_event_add_monotonic(e, 0, 0, time_handler, INT_TO_PTR('c'), &z) >= 0); |
da7e457c | 184 | assert_se(sd_event_add_quit(e, quit_handler, INT_TO_PTR('g'), &q) >= 0); |
fd38203a LP |
185 | |
186 | assert_se(sd_event_source_set_priority(x, 99) >= 0); | |
baf76283 | 187 | assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
188 | assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0); |
189 | assert_se(sd_event_source_set_priority(z, 50) >= 0); | |
baf76283 | 190 | assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
191 | assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0); |
192 | ||
193 | assert_se(write(a[1], &ch, 1) >= 0); | |
194 | assert_se(write(b[1], &ch, 1) >= 0); | |
195 | ||
196 | assert_se(!got_a && !got_b && !got_c); | |
197 | ||
198 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
199 | ||
200 | assert_se(!got_a && got_b && !got_c); | |
201 | ||
202 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
203 | ||
204 | assert_se(!got_a && got_b && got_c); | |
205 | ||
206 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
207 | ||
208 | assert_se(got_a && got_b && got_c); | |
209 | ||
210 | sd_event_source_unref(x); | |
211 | sd_event_source_unref(y); | |
212 | ||
213 | do_quit = true; | |
214 | assert_se(sd_event_source_set_time(z, now(CLOCK_MONOTONIC) + 200 * USEC_PER_MSEC) >= 0); | |
baf76283 | 215 | assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
216 | |
217 | assert_se(sd_event_loop(e) >= 0); | |
218 | ||
219 | sd_event_source_unref(z); | |
da7e457c | 220 | sd_event_source_unref(q); |
fd38203a | 221 | |
d5e4ec5b LP |
222 | sd_event_source_unref(w); |
223 | ||
fd38203a LP |
224 | sd_event_unref(e); |
225 | ||
226 | close_pipe(a); | |
227 | close_pipe(b); | |
228 | ||
229 | return 0; | |
230 | } |