229 lines
7.1 KiB
C
229 lines
7.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "sd-event.h"
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#include "log.h"
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#include "util.h"
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static int prepare_handler(sd_event_source *s, void *userdata) {
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log_info("preparing %c", PTR_TO_INT(userdata));
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return 1;
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}
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static bool got_a, got_b, got_c;
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static unsigned got_d;
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static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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log_info("got IO on %c", PTR_TO_INT(userdata));
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if (userdata == INT_TO_PTR('a')) {
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assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
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assert_se(!got_a);
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got_a = true;
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} else if (userdata == INT_TO_PTR('b')) {
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assert_se(!got_b);
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got_b = true;
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} else if (userdata == INT_TO_PTR('d')) {
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got_d++;
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if (got_d < 2)
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assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
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else
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assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
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} else
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assert_not_reached("Yuck!");
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return 1;
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}
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static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
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assert(s);
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assert(si);
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log_info("got child on %c", PTR_TO_INT(userdata));
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assert(userdata == INT_TO_PTR('f'));
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assert_se(sd_event_request_quit(sd_event_get(s)) >= 0);
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sd_event_source_unref(s);
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return 1;
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}
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static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
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sd_event_source *p;
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sigset_t ss;
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pid_t pid;
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assert(s);
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assert(si);
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log_info("got signal on %c", PTR_TO_INT(userdata));
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assert(userdata == INT_TO_PTR('e'));
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assert_se(sigemptyset(&ss) >= 0);
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assert_se(sigaddset(&ss, SIGCHLD) >= 0);
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assert_se(sigprocmask(SIG_BLOCK, &ss, NULL) >= 0);
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pid = fork();
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assert_se(pid >= 0);
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if (pid == 0)
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_exit(0);
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assert_se(sd_event_add_child(sd_event_get(s), pid, WEXITED, child_handler, INT_TO_PTR('f'), &p) >= 0);
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assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
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sd_event_source_unref(s);
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return 1;
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}
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static int defer_handler(sd_event_source *s, void *userdata) {
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sd_event_source *p;
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sigset_t ss;
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assert(s);
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log_info("got defer on %c", PTR_TO_INT(userdata));
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assert(userdata == INT_TO_PTR('d'));
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assert_se(sigemptyset(&ss) >= 0);
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assert_se(sigaddset(&ss, SIGUSR1) >= 0);
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assert_se(sigprocmask(SIG_BLOCK, &ss, NULL) >= 0);
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assert_se(sd_event_add_signal(sd_event_get(s), SIGUSR1, signal_handler, INT_TO_PTR('e'), &p) >= 0);
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assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
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raise(SIGUSR1);
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sd_event_source_unref(s);
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return 1;
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}
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static bool do_quit = false;
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static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
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log_info("got timer on %c", PTR_TO_INT(userdata));
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if (userdata == INT_TO_PTR('c')) {
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if (do_quit) {
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sd_event_source *p;
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assert_se(sd_event_add_defer(sd_event_get(s), defer_handler, INT_TO_PTR('d'), &p) >= 0);
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assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
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} else {
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assert(!got_c);
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got_c = true;
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}
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} else
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assert_not_reached("Huh?");
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return 2;
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}
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static bool got_quit = false;
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static int quit_handler(sd_event_source *s, void *userdata) {
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log_info("got quit handler on %c", PTR_TO_INT(userdata));
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got_quit = true;
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return 3;
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}
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int main(int argc, char *argv[]) {
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sd_event *e = NULL;
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sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL;
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static const char ch = 'x';
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int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1};
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assert_se(pipe(a) >= 0);
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assert_se(pipe(b) >= 0);
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assert_se(pipe(d) >= 0);
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assert_se(sd_event_new(&e) >= 0);
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got_a = false, got_b = false, got_c = false, got_d = 0;
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/* Add a oneshot handler, trigger it, re-enable it, and trigger
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* it again. */
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assert_se(sd_event_add_io(e, d[0], EPOLLIN, io_handler, INT_TO_PTR('d'), &w) >= 0);
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assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
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assert_se(write(d[1], &ch, 1) >= 0);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(got_d == 1);
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assert_se(write(d[1], &ch, 1) >= 0);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(got_d == 2);
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assert_se(sd_event_add_io(e, a[0], EPOLLIN, io_handler, INT_TO_PTR('a'), &x) >= 0);
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assert_se(sd_event_add_io(e, b[0], EPOLLIN, io_handler, INT_TO_PTR('b'), &y) >= 0);
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assert_se(sd_event_add_monotonic(e, 0, 0, time_handler, INT_TO_PTR('c'), &z) >= 0);
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assert_se(sd_event_add_quit(e, quit_handler, INT_TO_PTR('g'), &q) >= 0);
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assert_se(sd_event_source_set_priority(x, 99) >= 0);
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assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
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assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
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assert_se(sd_event_source_set_priority(z, 50) >= 0);
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assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
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assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
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assert_se(write(a[1], &ch, 1) >= 0);
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assert_se(write(b[1], &ch, 1) >= 0);
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assert_se(!got_a && !got_b && !got_c);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(!got_a && got_b && !got_c);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(!got_a && got_b && got_c);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(got_a && got_b && got_c);
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sd_event_source_unref(x);
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sd_event_source_unref(y);
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do_quit = true;
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assert_se(sd_event_source_set_time(z, now(CLOCK_MONOTONIC) + 200 * USEC_PER_MSEC) >= 0);
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assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
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assert_se(sd_event_loop(e) >= 0);
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sd_event_source_unref(z);
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sd_event_source_unref(q);
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sd_event_unref(e);
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close_pipe(a);
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close_pipe(b);
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return 0;
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}
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