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Add posix semaphores support

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There's still some bugs to work out on Windows and OpenBSD.
This commit is contained in:
Justine Tunney 2022-10-14 08:25:47 -07:00
parent f52f65b2e3
commit 8111462789
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36 changed files with 779 additions and 59 deletions
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test/libc/thread/sem_open_test.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/dce.h"
#include "libc/mem/gc.h"
#include "libc/mem/mem.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/temp.h"
#include "libc/sysv/consts/clock.h"
#include "libc/sysv/consts/o.h"
#include "libc/testlib/testlib.h"
#include "libc/thread/semaphore.h"
#include "libc/thread/thread.h"
pthread_barrier_t barrier;
char testlib_enable_tmp_setup_teardown;
void *Worker(void *arg) {
sem_t *s[2];
struct timespec ts;
ASSERT_NE(SEM_FAILED, (s[0] = sem_open("fooz", O_CREAT, 0644)));
ASSERT_NE(SEM_FAILED, (s[1] = sem_open("barz", O_CREAT, 0644)));
if (pthread_barrier_wait(&barrier) == PTHREAD_BARRIER_SERIAL_THREAD) {
if (!IsWindows()) { // :'(
ASSERT_SYS(0, 0, sem_unlink("fooz"));
ASSERT_SYS(0, 0, sem_unlink("barz"));
}
}
ASSERT_SYS(0, 0, clock_gettime(CLOCK_REALTIME, &ts));
ts.tv_sec += 1;
ASSERT_SYS(0, 0, sem_post(s[0]));
ASSERT_SYS(0, 0, sem_timedwait(s[1], &ts));
ASSERT_SYS(0, 0, sem_close(s[1]));
ASSERT_SYS(0, 0, sem_close(s[0]));
return 0;
}
TEST(sem_open, test) {
if (IsWindows()) return; // TODO(jart): fix me
sem_t *s[2];
int i, r, n = 4;
pthread_t *t = _gc(malloc(sizeof(pthread_t) * n));
ASSERT_EQ(0, pthread_barrier_init(&barrier, 0, n));
ASSERT_NE(SEM_FAILED, (s[0] = sem_open("fooz", O_CREAT, 0644)));
ASSERT_NE(SEM_FAILED, (s[1] = sem_open("barz", O_CREAT, 0644)));
for (i = 0; i < n; ++i) ASSERT_EQ(0, pthread_create(t + i, 0, Worker, 0));
for (i = 0; i < n; ++i) ASSERT_SYS(0, 0, sem_wait(s[0]));
ASSERT_SYS(0, 0, sem_getvalue(s[0], &r));
ASSERT_EQ(0, r);
for (i = 0; i < n; ++i) ASSERT_SYS(0, 0, sem_post(s[1]));
for (i = 0; i < n; ++i) ASSERT_EQ(0, pthread_join(t[i], 0));
ASSERT_SYS(0, 0, sem_getvalue(s[1], &r));
ASSERT_EQ(0, r);
ASSERT_SYS(0, 0, sem_close(s[1]));
ASSERT_SYS(0, 0, sem_close(s[0]));
ASSERT_EQ(0, pthread_barrier_destroy(&barrier));
}