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/* Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <pthread.h>
#include <tap/basic.h>
#include <unistd.h>
#include "knot/common/fdset.h"
#include "libknot/attribute.h"
#include "contrib/time.h"
#define PATTERN1 "0x45"
#define PATTERN2 "0xED"
#define TIMEOUT0 2000
#define TIMEOUT1 10
#define TIMEOUT2 400
#define JITTER (TIMEOUT2 - TIMEOUT1 - 10)
void *thr_action1(void *arg)
{
usleep(1000 * TIMEOUT1);
_unused_ int ret = write(*((int *)arg), &PATTERN1, 1);
return NULL;
}
void *thr_action2(void *arg)
{
usleep(1000 * TIMEOUT2);
_unused_ int ret = write(*((int *)arg), &PATTERN2, 1);
return NULL;
}
int main(int argc, char *argv[])
{
plan_lazy();
fdset_t fdset;
int ret = fdset_init(&fdset, 32);
ok(ret == KNOT_EOK, "fdset_init");
int fds0[2], fds1[2], fds2[2];
ret = pipe(fds0);
ok(ret >= 0, "create pipe 0");
ret = fdset_add(&fdset, fds0[0], FDSET_POLLIN, NULL);
ok(ret >= 0, "add pipe 0 to fdset");
ret = pipe(fds1);
ok(ret >= 0, "create pipe 1");
ret = fdset_add(&fdset, fds1[0], FDSET_POLLIN, NULL);
ok(ret >= 0, "add pipe 1 to fdset");
ret = pipe(fds2);
ok(ret >= 0, "create pipe 2");
ret = fdset_add(&fdset, fds2[0], FDSET_POLLIN, NULL);
ok(ret >= 0, "add pipe 2 to fdset");
ok(fdset_get_length(&fdset) == 3, "fdset size full");
struct timespec time0 = time_now();
pthread_t t1, t2;
ret = pthread_create(&t1, 0, thr_action1, &fds1[1]);
ok(ret == 0, "create thread 1");
ret = pthread_create(&t2, 0, thr_action2, &fds2[1]);
ok(ret == 0, "create thread 2");
fdset_it_t it;
ret = fdset_poll(&fdset, &it, 0, TIMEOUT0);
struct timespec time1 = time_now();
double diff1 = time_diff_ms(&time0, &time1);
ok(ret == 1, "fdset_poll return 1");
ok(diff1 >= TIMEOUT1 && diff1 < TIMEOUT1 + JITTER, "fdset_poll timeout 1 (%f)", diff1);
for(; !fdset_it_is_done(&it); fdset_it_next(&it)) {
ok(!fdset_it_is_error(&it), "fdset no error");
ok(fdset_it_is_pollin(&it), "fdset can read");
int fd = fdset_it_get_fd(&it);
ok(fd == fds1[0], "fdset_it fd check");
char buf = 0x00;
ret = read(fd, &buf, sizeof(buf));
ok(ret == 1 && buf == PATTERN1[0], "fdset_it value check");
fdset_it_remove(&it);
}
fdset_it_commit(&it);
ok(fdset_get_length(&fdset) == 2, "fdset size 2");
close(fds1[1]);
int fd2_dup = dup(fds2[0]);
ok(fd2_dup >= 0, "duplicate fd");
ret = fdset_poll(&fdset, &it, 0, TIMEOUT0);
struct timespec time2 = time_now();
double diff2 = time_diff_ms(&time0, &time2);
ok(ret == 1, "fdset_poll return 2");
ok(diff2 >= TIMEOUT2 && diff2 < TIMEOUT2 + JITTER, "fdset_poll timeout 2 (%f)", diff2);
for(; !fdset_it_is_done(&it); fdset_it_next(&it)) {
ok(!fdset_it_is_error(&it), "fdset no error");
ok(fdset_it_is_pollin(&it), "fdset can read");
int fd = fdset_it_get_fd(&it);
ok(fd == fds2[0], "fdset_it fd check");
char buf = 0x00;
ret = read(fd, &buf, sizeof(buf));
ok(ret == 1 && buf == PATTERN2[0], "fdset_it value check");
fdset_it_remove(&it);
}
fdset_it_commit(&it);
ok(fdset_get_length(&fdset) == 1, "fdset size 1");
pthread_join(t1, 0);
pthread_join(t2, 0);
ret = fdset_remove(&fdset, 0);
ok(ret == KNOT_EOK, "fdset remove");
close(fds0[1]);
ok(fdset_get_length(&fdset) == 0, "fdset size 0");
ret = write(fds2[1], &PATTERN2, 1);
ok(ret == 1, "write to removed fd");
ret = fdset_poll(&fdset, &it, 0, 100);
ok(ret == 0, "fdset_poll return 3");
close(fds2[1]);
if (fd2_dup >= 0) {
close(fd2_dup);
}
fdset_clear(&fdset);
return 0;
}
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