src/libsystemd/sd-event/test-event.c - systemd-stable - Rivoreo Source Code Repositories

 /* SPDX-License-Identifier: LGPL-2.1+ */
 /***
   This file is part of systemd.

   Copyright 2013 Lennart Poettering

   systemd is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   systemd is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/

 #include <sys/wait.h>

 #include "sd-event.h"

 #include "fd-util.h"
 #include "log.h"
 #include "macro.h"
 #include "signal-util.h"
 #include "util.h"
 #include "process-util.h"

 static int prepare_handler(sd_event_source *s, void *userdata) {
         log_info("preparing %c", PTR_TO_INT(userdata));
         return 1;
 }

 static bool got_a, got_b, got_c, got_unref;
 static unsigned got_d;

 static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
         sd_event_source_unref(s);
         got_unref = true;
         return 0;
 }

 static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

         log_info("got IO on %c", PTR_TO_INT(userdata));

         if (userdata == INT_TO_PTR('a')) {
                 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
                 assert_se(!got_a);
                 got_a = true;
         } else if (userdata == INT_TO_PTR('b')) {
                 assert_se(!got_b);
                 got_b = true;
         } else if (userdata == INT_TO_PTR('d')) {
                 got_d++;
                 if (got_d < 2)
                         assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
                 else
                         assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
         } else
                 assert_not_reached("Yuck!");

         return 1;
 }

 static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {

         assert_se(s);
         assert_se(si);

         log_info("got child on %c", PTR_TO_INT(userdata));

         assert_se(userdata == INT_TO_PTR('f'));

         assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
         sd_event_source_unref(s);

         return 1;
 }

 static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
         sd_event_source *p = NULL;
         pid_t pid;

         assert_se(s);
         assert_se(si);

         log_info("got signal on %c", PTR_TO_INT(userdata));

         assert_se(userdata == INT_TO_PTR('e'));

         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);

         pid = fork();
         assert_se(pid >= 0);

         if (pid == 0)
                 _exit(EXIT_SUCCESS);

         assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
         assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);

         sd_event_source_unref(s);

         return 1;
 }

 static int defer_handler(sd_event_source *s, void *userdata) {
         sd_event_source *p = NULL;

         assert_se(s);

         log_info("got defer on %c", PTR_TO_INT(userdata));

         assert_se(userdata == INT_TO_PTR('d'));

         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);

         assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
         assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
         raise(SIGUSR1);

         sd_event_source_unref(s);

         return 1;
 }

 static bool do_quit = false;

 static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
         log_info("got timer on %c", PTR_TO_INT(userdata));

         if (userdata == INT_TO_PTR('c')) {

                 if (do_quit) {
                         sd_event_source *p;

                         assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
                         assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
                 } else {
                         assert_se(!got_c);
                         got_c = true;
                 }
         } else
                 assert_not_reached("Huh?");

         return 2;
 }

 static bool got_exit = false;

 static int exit_handler(sd_event_source *s, void *userdata) {
         log_info("got quit handler on %c", PTR_TO_INT(userdata));

         got_exit = true;

         return 3;
 }

 static bool got_post = false;

 static int post_handler(sd_event_source *s, void *userdata) {
         log_info("got post handler");

         got_post = true;

         return 2;
 }

 static void test_basic(void) {
         sd_event *e = NULL;
         sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
         static const char ch = 'x';
         int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
         uint64_t event_now;
         int64_t priority;

         assert_se(pipe(a) >= 0);
         assert_se(pipe(b) >= 0);
         assert_se(pipe(d) >= 0);
         assert_se(pipe(k) >= 0);

         assert_se(sd_event_default(&e) >= 0);
         assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);

         assert_se(sd_event_set_watchdog(e, true) >= 0);

         /* Test whether we cleanly can destroy an io event source from its own handler */
         got_unref = false;
         assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
         assert_se(write(k[1], &ch, 1) == 1);
         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
         assert_se(got_unref);

         got_a = false, got_b = false, got_c = false, got_d = 0;

         /* Add a oneshot handler, trigger it, re-enable it, and trigger
          * it again. */
         assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
         assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
         assert_se(write(d[1], &ch, 1) >= 0);
         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
         assert_se(got_d == 1);
         assert_se(write(d[1], &ch, 1) >= 0);
         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
         assert_se(got_d == 2);

         assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
         assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
         assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
         assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);

         assert_se(sd_event_source_set_priority(x, 99) >= 0);
         assert_se(sd_event_source_get_priority(x, &priority) >= 0);
         assert_se(priority == 99);
         assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
         assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
         assert_se(sd_event_source_set_priority(z, 50) >= 0);
         assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
         assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);

         /* Test for floating event sources */
         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
         assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);

         assert_se(write(a[1], &ch, 1) >= 0);
         assert_se(write(b[1], &ch, 1) >= 0);

         assert_se(!got_a && !got_b && !got_c);

         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

         assert_se(!got_a && got_b && !got_c);

         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

         assert_se(!got_a && got_b && got_c);

         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

         assert_se(got_a && got_b && got_c);

         sd_event_source_unref(x);
         sd_event_source_unref(y);

         do_quit = true;
         assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
         assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
         assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
         assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);

         assert_se(sd_event_loop(e) >= 0);
         assert_se(got_post);
         assert_se(got_exit);

         sd_event_source_unref(z);
         sd_event_source_unref(q);

         sd_event_source_unref(w);

         sd_event_unref(e);

         safe_close_pair(a);
         safe_close_pair(b);
         safe_close_pair(d);
         safe_close_pair(k);
 }

 static void test_sd_event_now(void) {
         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
         uint64_t event_now;

         assert_se(sd_event_new(&e) >= 0);
         assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
         assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
         assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
         if (clock_boottime_supported()) {
                 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
                 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
         }
         assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
         assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);

         assert_se(sd_event_run(e, 0) == 0);

         assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
         assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
         assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
         if (clock_boottime_supported()) {
                 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
                 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
         }
         assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
         assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
 }

 static int last_rtqueue_sigval = 0;
 static int n_rtqueue = 0;

 static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
         last_rtqueue_sigval = si->ssi_int;
         n_rtqueue++;
         return 0;
 }

 static void test_rtqueue(void) {
         sd_event_source *u = NULL, *v = NULL, *s = NULL;
         sd_event *e = NULL;

         assert_se(sd_event_default(&e) >= 0);

         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
         assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
         assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
         assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);

         assert_se(sd_event_source_set_priority(v, -10) >= 0);

         assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
         assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
         assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
         assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
         assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);

         assert_se(n_rtqueue == 0);
         assert_se(last_rtqueue_sigval == 0);

         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
         assert_se(n_rtqueue == 1);
         assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */

         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
         assert_se(n_rtqueue == 2);
         assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */

         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
         assert_se(n_rtqueue == 3);
         assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */

         assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
         assert_se(n_rtqueue == 4);
         assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */

         assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
         assert_se(n_rtqueue == 4);
         assert_se(last_rtqueue_sigval == 1);

         sd_event_source_unref(u);
         sd_event_source_unref(v);
         sd_event_source_unref(s);

         sd_event_unref(e);
 }

 int main(int argc, char *argv[]) {

         log_set_max_level(LOG_DEBUG);
         log_parse_environment();

         test_basic();
         test_sd_event_now();
         test_rtqueue();

         return 0;
 }
	/* SPDX-License-Identifier: LGPL-2.1+ */
	/***
	This file is part of systemd.

	Copyright 2013 Lennart Poettering

	systemd is free software; you can redistribute it and/or modify it
	under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation; either version 2.1 of the License, or
	(at your option) any later version.

	systemd is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	***/

	#include <sys/wait.h>

	#include "sd-event.h"

	#include "fd-util.h"
	#include "log.h"
	#include "macro.h"
	#include "signal-util.h"
	#include "util.h"
	#include "process-util.h"

	static int prepare_handler(sd_event_source s, void userdata) {
	log_info("preparing %c", PTR_TO_INT(userdata));
	return 1;
	}

	static bool got_a, got_b, got_c, got_unref;
	static unsigned got_d;

	static int unref_handler(sd_event_source s, int fd, uint32_t revents, void userdata) {
	sd_event_source_unref(s);
	got_unref = true;
	return 0;
	}

	static int io_handler(sd_event_source s, int fd, uint32_t revents, void userdata) {

	log_info("got IO on %c", PTR_TO_INT(userdata));

	if (userdata == INT_TO_PTR('a')) {
	assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
	assert_se(!got_a);
	got_a = true;
	} else if (userdata == INT_TO_PTR('b')) {
	assert_se(!got_b);
	got_b = true;
	} else if (userdata == INT_TO_PTR('d')) {
	got_d++;
	if (got_d < 2)
	assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
	else
	assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
	} else
	assert_not_reached("Yuck!");

	return 1;
	}

	static int child_handler(sd_event_source s, const siginfo_t si, void *userdata) {

	assert_se(s);
	assert_se(si);

	log_info("got child on %c", PTR_TO_INT(userdata));

	assert_se(userdata == INT_TO_PTR('f'));

	assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
	sd_event_source_unref(s);

	return 1;
	}

	static int signal_handler(sd_event_source s, const struct signalfd_siginfo si, void *userdata) {
	sd_event_source *p = NULL;
	pid_t pid;

	assert_se(s);
	assert_se(si);

	log_info("got signal on %c", PTR_TO_INT(userdata));

	assert_se(userdata == INT_TO_PTR('e'));

	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);

	pid = fork();
	assert_se(pid >= 0);

	if (pid == 0)
	_exit(EXIT_SUCCESS);

	assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);

	sd_event_source_unref(s);

	return 1;
	}

	static int defer_handler(sd_event_source s, void userdata) {
	sd_event_source *p = NULL;

	assert_se(s);

	log_info("got defer on %c", PTR_TO_INT(userdata));

	assert_se(userdata == INT_TO_PTR('d'));

	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);

	assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
	raise(SIGUSR1);

	sd_event_source_unref(s);

	return 1;
	}

	static bool do_quit = false;

	static int time_handler(sd_event_source s, uint64_t usec, void userdata) {
	log_info("got timer on %c", PTR_TO_INT(userdata));

	if (userdata == INT_TO_PTR('c')) {

	if (do_quit) {
	sd_event_source *p;

	assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
	} else {
	assert_se(!got_c);
	got_c = true;
	}
	} else
	assert_not_reached("Huh?");

	return 2;
	}

	static bool got_exit = false;

	static int exit_handler(sd_event_source s, void userdata) {
	log_info("got quit handler on %c", PTR_TO_INT(userdata));

	got_exit = true;

	return 3;
	}

	static bool got_post = false;

	static int post_handler(sd_event_source s, void userdata) {
	log_info("got post handler");

	got_post = true;

	return 2;
	}

	static void test_basic(void) {
	sd_event *e = NULL;
	sd_event_source w = NULL, x = NULL, y = NULL, z = NULL, q = NULL, t = NULL;
	static const char ch = 'x';
	int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
	uint64_t event_now;
	int64_t priority;

	assert_se(pipe(a) >= 0);
	assert_se(pipe(b) >= 0);
	assert_se(pipe(d) >= 0);
	assert_se(pipe(k) >= 0);

	assert_se(sd_event_default(&e) >= 0);
	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);

	assert_se(sd_event_set_watchdog(e, true) >= 0);

	/* Test whether we cleanly can destroy an io event source from its own handler */
	got_unref = false;
	assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
	assert_se(write(k[1], &ch, 1) == 1);
	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	assert_se(got_unref);

	got_a = false, got_b = false, got_c = false, got_d = 0;

	/* Add a oneshot handler, trigger it, re-enable it, and trigger
	* it again. */
	assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
	assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
	assert_se(write(d[1], &ch, 1) >= 0);
	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	assert_se(got_d == 1);
	assert_se(write(d[1], &ch, 1) >= 0);
	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	assert_se(got_d == 2);

	assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
	assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
	assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
	assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);

	assert_se(sd_event_source_set_priority(x, 99) >= 0);
	assert_se(sd_event_source_get_priority(x, &priority) >= 0);
	assert_se(priority == 99);
	assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
	assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
	assert_se(sd_event_source_set_priority(z, 50) >= 0);
	assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
	assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);

	/* Test for floating event sources */
	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
	assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);

	assert_se(write(a[1], &ch, 1) >= 0);
	assert_se(write(b[1], &ch, 1) >= 0);

	assert_se(!got_a && !got_b && !got_c);

	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

	assert_se(!got_a && got_b && !got_c);

	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

	assert_se(!got_a && got_b && got_c);

	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

	assert_se(got_a && got_b && got_c);

	sd_event_source_unref(x);
	sd_event_source_unref(y);

	do_quit = true;
	assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
	assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
	assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);

	assert_se(sd_event_loop(e) >= 0);
	assert_se(got_post);
	assert_se(got_exit);

	sd_event_source_unref(z);
	sd_event_source_unref(q);

	sd_event_source_unref(w);

	sd_event_unref(e);

	safe_close_pair(a);
	safe_close_pair(b);
	safe_close_pair(d);
	safe_close_pair(k);
	}

	static void test_sd_event_now(void) {
	_cleanup_(sd_event_unrefp) sd_event *e = NULL;
	uint64_t event_now;

	assert_se(sd_event_new(&e) >= 0);
	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
	assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
	assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
	if (clock_boottime_supported()) {
	assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
	assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
	}
	assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
	assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);

	assert_se(sd_event_run(e, 0) == 0);

	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
	assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
	assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
	if (clock_boottime_supported()) {
	assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
	assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
	}
	assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
	assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
	}

	static int last_rtqueue_sigval = 0;
	static int n_rtqueue = 0;

	static int rtqueue_handler(sd_event_source s, const struct signalfd_siginfo si, void *userdata) {
	last_rtqueue_sigval = si->ssi_int;
	n_rtqueue++;
	return 0;
	}

	static void test_rtqueue(void) {
	sd_event_source u = NULL, v = NULL, *s = NULL;
	sd_event *e = NULL;

	assert_se(sd_event_default(&e) >= 0);

	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
	assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
	assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
	assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);

	assert_se(sd_event_source_set_priority(v, -10) >= 0);

	assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
	assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
	assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
	assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
	assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);

	assert_se(n_rtqueue == 0);
	assert_se(last_rtqueue_sigval == 0);

	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	assert_se(n_rtqueue == 1);
	assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */

	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	assert_se(n_rtqueue == 2);
	assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */

	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	assert_se(n_rtqueue == 3);
	assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */

	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	assert_se(n_rtqueue == 4);
	assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */

	assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
	assert_se(n_rtqueue == 4);
	assert_se(last_rtqueue_sigval == 1);

	sd_event_source_unref(u);
	sd_event_source_unref(v);
	sd_event_source_unref(s);

	sd_event_unref(e);
	}

	int main(int argc, char *argv[]) {

	log_set_max_level(LOG_DEBUG);
	log_parse_environment();

	test_basic();
	test_sd_event_now();
	test_rtqueue();

	return 0;
	}