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Add *NSYNC unit test suite

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This change also fixes the clock_nanosleep() api and polyfills futexes
on Windows, Mac, and NetBSD using exponential backoff.
This commit is contained in:
Justine Tunney 2022-10-07 21:29:40 -07:00
parent 3421b9a580
commit 9849b4c7ba
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GPG key ID: BE714B4575D6E328
51 changed files with 5505 additions and 1060 deletions
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third_party/nsync/testing/wait_test.c vendored Normal file
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/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2016 Google Inc. │
│ │
│ Licensed under the Apache License, Version 2.0 (the "License"); │
│ you may not use this file except in compliance with the License. │
│ You may obtain a copy of the License at │
│ │
│ http://www.apache.org/licenses/LICENSE-2.0 │
│ │
│ Unless required by applicable law or agreed to in writing, software │
│ distributed under the License is distributed on an "AS IS" BASIS, │
│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
│ See the License for the specific language governing permissions and │
│ limitations under the License. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/str/str.h"
#include "third_party/nsync/counter.h"
#include "third_party/nsync/note.h"
#include "third_party/nsync/testing/array.h"
#include "third_party/nsync/testing/closure.h"
#include "third_party/nsync/testing/smprintf.h"
#include "third_party/nsync/testing/testing.h"
#include "third_party/nsync/testing/time_extra.h"
#include "third_party/nsync/time.h"
#include "third_party/nsync/waiter.h"
// clang-format off
static void decrement_at (nsync_counter c, nsync_time abs_deadline, nsync_counter done) {
nsync_time_sleep_until (abs_deadline);
nsync_counter_add (c, -1);
nsync_counter_add (done, -1);
}
CLOSURE_DECL_BODY3 (decrement, nsync_counter, nsync_time, nsync_counter)
static void notify_at (nsync_note n, nsync_time abs_deadline, nsync_counter done) {
nsync_time_sleep_until (abs_deadline);
nsync_note_notify (n);
nsync_counter_add (done, -1);
}
CLOSURE_DECL_BODY3 (notify, nsync_note, nsync_time, nsync_counter)
typedef A_TYPE (struct nsync_waitable_s) a_waitable;
typedef A_TYPE (struct nsync_waitable_s *) a_pwaitable;
/* Test nsync_wait_n(). */
static void test_wait_n (testing t) {
int i;
int j;
int k;
int ncounter = 10;
int nnote = 10;
int nnote_expire = 10;
for (i = 0; i != 30; i++) {
nsync_counter done = nsync_counter_new (0);
nsync_time now;
nsync_time deadline;
a_waitable aw;
a_pwaitable apw;
memset (&aw, 0, sizeof (aw));
memset (&apw, 0, sizeof (apw));
now = nsync_time_now ();
deadline = nsync_time_add (now, nsync_time_ms (100));
for (j = A_LEN (&aw); A_LEN (&aw) < j+ncounter;) {
nsync_counter c = nsync_counter_new (0);
struct nsync_waitable_s *w = &A_PUSH (&aw);
w->v = c;
w->funcs = &nsync_counter_waitable_funcs;
for (k = 0; k != 4 && A_LEN (&aw) < j+ncounter; k++) {
nsync_counter_add (c, 1);
nsync_counter_add (done, 1);
closure_fork (closure_decrement (&decrement_at, c, deadline, done));
}
}
for (j = A_LEN (&aw); A_LEN (&aw) < j+nnote;) {
nsync_note n = nsync_note_new (NULL, nsync_time_no_deadline);
struct nsync_waitable_s *w = &A_PUSH (&aw);
w->v = n;
w->funcs = &nsync_note_waitable_funcs;
nsync_counter_add (done, 1);
closure_fork (closure_notify (&notify_at, n, deadline, done));
for (k = 0; k != 4 && A_LEN (&aw) < j+nnote; k++) {
nsync_note cn = nsync_note_new (n, nsync_time_no_deadline);
struct nsync_waitable_s *lw = &A_PUSH (&aw);
lw->v = cn;
lw->funcs = &nsync_note_waitable_funcs;
}
}
for (j = A_LEN (&aw); A_LEN (&aw) < j+nnote_expire;) {
nsync_note n = nsync_note_new (NULL, deadline);
struct nsync_waitable_s *w = &A_PUSH (&aw);
w->v = n;
w->funcs = &nsync_note_waitable_funcs;
nsync_counter_add (done, 1);
closure_fork (closure_notify (&notify_at, n, deadline, done));
for (k = 0; k != 4 && A_LEN (&aw) < j+nnote; k++) {
nsync_note cn = nsync_note_new (n, nsync_time_no_deadline);
struct nsync_waitable_s *lw = &A_PUSH (&aw);
lw->v = cn;
lw->funcs = &nsync_note_waitable_funcs;
}
}
if (ncounter + nnote + nnote_expire != A_LEN (&aw)) {
TEST_ERROR (t, ("array length not equal to number of counters"));
}
for (j = 0; j != A_LEN (&aw); j++) {
A_PUSH (&apw) = &A (&aw, j);
}
while (A_LEN (&apw) != 0) {
k = nsync_wait_n (NULL, NULL, NULL, nsync_time_no_deadline,
A_LEN (&apw), &A (&apw, 0));
if (k == A_LEN (&apw)) {
TEST_ERROR (t, ("nsync_wait_n returned with no waiter ready"));
}
A (&apw, k) = A (&apw, A_LEN (&apw) - 1);
A_DISCARD (&apw, 1);
}
nsync_counter_wait (done, nsync_time_no_deadline);
for (k = 0; k != ncounter; k++) {
nsync_counter_free ((nsync_counter) A (&aw, k).v);
}
for (; k < A_LEN (&aw); k++) {
nsync_note_free ((nsync_note) A (&aw, k).v);
}
A_FREE (&apw);
A_FREE (&aw);
nsync_counter_free (done);
}
}
/* Call *nsync_note_waitable_funcs.ready_time, and return its result, but
before returning, notify the nsync_note. This is used by
test_wait_n_ready_while_queuing() to wrap nsync_note's normal *ready_time
function, so that the behaviour of nsync_wait_n() can be checked when a
notification happens while the enqueueing process. */
static nsync_time note_ready_time_wrapper (void *v, struct nsync_waiter_s *nw) {
nsync_note n = (nsync_note) v;
nsync_time result;
result = (*nsync_note_waitable_funcs.ready_time) (v, nw);
nsync_note_notify (n);
return (result);
}
/* The following test checks that nsync_wait_n() behaves correctly if
some object becomes ready during the enqueuing process. */
static void test_wait_n_ready_while_queuing (testing t) {
struct nsync_waitable_s w[2];
struct nsync_waitable_s *pw[2];
int count;
int woken;
/* This test works by wrapping nsync_note's *ready_time function so
that the note is notified just after nsync_wait_n() checks that it
if not notified on entry. */
struct nsync_waitable_funcs_s wrapped_note_waitable_funcs;
wrapped_note_waitable_funcs = nsync_note_waitable_funcs;
wrapped_note_waitable_funcs.ready_time = &note_ready_time_wrapper;
for (count = 0; count != sizeof (w) / sizeof (w[0]); count++) {
nsync_note n = nsync_note_new (NULL, nsync_time_no_deadline);
if (nsync_note_is_notified (n)) {
TEST_ERROR (t, ("nsync_note is unexpectedly notified"));
}
w[count].v = n;
w[count].funcs = &wrapped_note_waitable_funcs;
pw[count] = &w[count];
}
woken = nsync_wait_n (NULL, NULL, NULL, nsync_time_no_deadline,
count, pw);
if (woken != 0) {
TEST_ERROR (t, ("nsync_wait_n unexpectedly failed to find pw[0] notified"));
}
for (count = 0; count != sizeof (w) / sizeof (w[0]); count++) {
nsync_note n = (nsync_note) w[count].v;
if (!nsync_note_is_notified (n)) {
TEST_ERROR (t, ("nsync_note is unexpectedly not notified"));
}
nsync_note_free (n);
}
}
int main (int argc, char *argv[]) {
testing_base tb = testing_new (argc, argv, 0);
TEST_RUN (tb, test_wait_n);
TEST_RUN (tb, test_wait_n_ready_while_queuing);
return (testing_base_exit (tb));
}