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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Test program to verify that scheduled timers are executed in the
* correct order.
*
* Copyright (C) 2013 by Open Source Routing.
* Copyright (C) 2013 by Internet Systems Consortium, Inc. ("ISC")
*
* This file is part of Quagga
*/
#include <zebra.h>
#include <stdio.h>
#include <unistd.h>
#include "memory.h"
#include "prng.h"
#include "frrevent.h"
#define SCHEDULE_TIMERS 800
#define REMOVE_TIMERS 200
#define TIMESTR_LEN strlen("4294967296.999999")
struct event_loop *master;
static size_t log_buf_len;
static size_t log_buf_pos;
static char *log_buf;
static size_t expected_buf_len;
static size_t expected_buf_pos;
static char *expected_buf;
static struct prng *prng;
static struct event **timers;
static int timers_pending;
static void terminate_test(void)
{
int exit_code;
if (strcmp(log_buf, expected_buf)) {
fprintf(stderr,
"Expected output and received output differ.\n");
fprintf(stderr, "---Expected output: ---\n%s", expected_buf);
fprintf(stderr, "---Actual output: ---\n%s", log_buf);
exit_code = 1;
} else {
printf("Expected output and actual output match.\n");
exit_code = 0;
}
event_master_free(master);
XFREE(MTYPE_TMP, log_buf);
XFREE(MTYPE_TMP, expected_buf);
prng_free(prng);
XFREE(MTYPE_TMP, timers);
exit(exit_code);
}
static void timer_func(struct event *thread)
{
int rv;
rv = snprintf(log_buf + log_buf_pos, log_buf_len - log_buf_pos, "%s\n",
(char *)thread->arg);
assert(rv >= 0);
log_buf_pos += rv;
assert(log_buf_pos < log_buf_len);
XFREE(MTYPE_TMP, thread->arg);
timers_pending--;
if (!timers_pending)
terminate_test();
}
static int cmp_timeval(const void *a, const void *b)
{
const struct timeval *ta = *(struct timeval * const *)a;
const struct timeval *tb = *(struct timeval * const *)b;
if (timercmp(ta, tb, <))
return -1;
if (timercmp(ta, tb, >))
return 1;
return 0;
}
int main(int argc, char **argv)
{
int i, j;
struct event t;
struct timeval **alarms;
master = event_master_create(NULL);
log_buf_len = SCHEDULE_TIMERS * (TIMESTR_LEN + 1) + 1;
log_buf_pos = 0;
log_buf = XMALLOC(MTYPE_TMP, log_buf_len);
expected_buf_len = SCHEDULE_TIMERS * (TIMESTR_LEN + 1) + 1;
expected_buf_pos = 0;
expected_buf = XMALLOC(MTYPE_TMP, expected_buf_len);
prng = prng_new(0);
timers = XCALLOC(MTYPE_TMP, SCHEDULE_TIMERS * sizeof(*timers));
for (i = 0; i < SCHEDULE_TIMERS; i++) {
long interval_msec;
int ret;
char *arg;
/* Schedule timers to expire in 0..5 seconds */
interval_msec = prng_rand(prng) % 5000;
arg = XMALLOC(MTYPE_TMP, TIMESTR_LEN + 1);
event_add_timer_msec(master, timer_func, arg, interval_msec,
&timers[i]);
ret = snprintf(arg, TIMESTR_LEN + 1, "%lld.%06lld",
(long long)timers[i]->u.sands.tv_sec,
(long long)timers[i]->u.sands.tv_usec);
assert(ret > 0);
assert((size_t)ret < TIMESTR_LEN + 1);
timers_pending++;
}
for (i = 0; i < REMOVE_TIMERS; i++) {
int index;
index = prng_rand(prng) % SCHEDULE_TIMERS;
if (!timers[index])
continue;
XFREE(MTYPE_TMP, timers[index]->arg);
event_cancel(&timers[index]);
timers_pending--;
}
/* We create an array of pointers to the alarm times and sort
* that array. That sorted array is used to generate a string
* representing the expected "output" of the timers when they
* are run. */
j = 0;
alarms = XCALLOC(MTYPE_TMP, timers_pending * sizeof(*alarms));
for (i = 0; i < SCHEDULE_TIMERS; i++) {
if (!timers[i])
continue;
alarms[j++] = &timers[i]->u.sands;
}
qsort(alarms, j, sizeof(*alarms), cmp_timeval);
for (i = 0; i < j; i++) {
int ret;
ret = snprintf(expected_buf + expected_buf_pos,
expected_buf_len - expected_buf_pos,
"%lld.%06lld\n", (long long)alarms[i]->tv_sec,
(long long)alarms[i]->tv_usec);
assert(ret > 0);
expected_buf_pos += ret;
assert(expected_buf_pos < expected_buf_len);
}
XFREE(MTYPE_TMP, alarms);
while (event_fetch(master, &t))
event_call(&t);
return 0;
}
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