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/* Copyright (C) 2011 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 <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/time.h>
#include <pthread.h>
#include "tests/common/fdset_tests.h"
#include "common/fdset.h"
#define WRITE_PATTERN ((char) 0xde)
#define WRITE_PATTERN_LEN sizeof(char)
/* Subtract the `struct timeval' values X and Y,
storing the result in RESULT.
Return 1 if the difference is negative, otherwise 0.
Copyright http://www.delorie.com/gnu/docs/glibc/libc_428.html
*/
static int timeval_subtract (struct timeval *result, struct timeval *x, struct timeval* y)
{
/* Perform the carry for the later subtraction by updating y. */
if (x->tv_usec < y->tv_usec) {
int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if (x->tv_usec - y->tv_usec > 1000000) {
int nsec = (x->tv_usec - y->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
/* Compute the time remaining to wait.
tv_usec is certainly positive. */
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/* Return 1 if result is negative. */
return x->tv_sec < y->tv_sec;
}
static size_t timeval_diff(struct timeval *from, struct timeval *to) {
struct timeval res;
timeval_subtract(&res, to, from);
return res.tv_sec*1000 + res.tv_usec/1000;
}
static int fdset_tests_count(int argc, char *argv[]);
static int fdset_tests_run(int argc, char *argv[]);
/*! Exported unit API.
*/
unit_api fdset_tests_api = {
"Native fdset poll wrapper", //! Unit name
&fdset_tests_count, //! Count scheduled tests
&fdset_tests_run //! Run scheduled tests
};
void* thr_action(void *arg)
{
int *fd = (int *)arg;
/* Sleep for 100ms. */
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 100 * 1000; // 100ms
select(0, 0, 0, 0, &tv);
/* Write pattern. */
char pattern = WRITE_PATTERN;
if (write(*fd, &pattern, WRITE_PATTERN_LEN) == -1) {
// Error.
}
return NULL;
}
static int fdset_tests_count(int argc, char *argv[])
{
return 11;
}
static int fdset_tests_run(int argc, char *argv[])
{
diag("fdset: implements '%s'", fdset_method());
/* 1. Create fdset. */
fdset_t *set = fdset_new();
ok(set != 0, "fdset: new");
/* 2. Create pipe. */
int fds[2], tmpfds[2];
int ret = pipe(fds);
ok(ret >= 0, "fdset: pipe() works");
ret = pipe(tmpfds);
/* 3. Add fd to set. */
ret = fdset_add(set, fds[0], OS_EV_READ);
ok(ret == 0, "fdset: add to set works");
fdset_add(set, tmpfds[0], OS_EV_READ);
/* Schedule write. */
struct timeval ts, te;
gettimeofday(&ts, 0);
pthread_t t;
pthread_create(&t, 0, thr_action, &fds[1]);
/* 4. Watch fdset. */
ret = fdset_wait(set, OS_EV_FOREVER);
gettimeofday(&te, 0);
size_t diff = timeval_diff(&ts, &te);
ok(ret > 0 && diff > 99 && diff < 10000,
"fdset: poll returned events in %zu ms", diff);
/* 5. Prepare event set. */
fdset_it_t it;
ret = fdset_begin(set, &it);
ok(ret == 0 && it.fd == fds[0], "fdset: begin is valid, ret=%d", ret);
/* 6. Receive data. */
char buf = 0x00;
ret = read(it.fd, &buf, WRITE_PATTERN_LEN);
ok(ret >= 0 && buf == WRITE_PATTERN, "fdset: contains valid data, fd=%d", it.fd);
/* 7. Iterate event set. */
ret = fdset_next(set, &it);
ok(ret < 0, "fdset: boundary check works");
/* 8. Remove from event set. */
ret = fdset_remove(set, fds[0]);
ok(ret == 0, "fdset: remove from fdset works");
close(fds[0]);
close(fds[1]);
ret = fdset_remove(set, tmpfds[0]);
close(tmpfds[1]);
close(tmpfds[1]);
/* 9. Poll empty fdset. */
ret = fdset_wait(set, OS_EV_FOREVER);
ok(ret <= 0, "fdset: polling empty fdset returns -1 (ret=%d)", ret);
/* 10. Crash test. */
lives_ok({
fdset_destroy(0);
fdset_add(0, -1, 0);
fdset_remove(0, -1);
fdset_wait(0, OS_EV_NOWAIT);
fdset_begin(0, 0);
fdset_end(0, 0);
fdset_next(0, 0);
fdset_method();
}, "fdset: crash test successful");
/* 11. Destroy fdset. */
ret = fdset_destroy(set);
ok(ret == 0, "fdset: destroyed");
/* Cleanup. */
pthread_join(t, 0);
return 0;
}
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