mirror of
https://github.com/jart/cosmopolitan.git
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68 lines
3.1 KiB
C
68 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/atomic.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/gc.h"
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#include "libc/testlib/testlib.h"
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#include "libc/thread/spawn.h"
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#include "libc/thread/thread.h"
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#define ITERATIONS 50000
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#define READERS 8
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#define WRITERS 2
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atomic_int reads;
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atomic_int writes;
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pthread_rwlock_t lock;
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pthread_barrier_t barrier;
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int Reader(void *arg, int tid) {
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pthread_barrier_wait(&barrier);
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for (int i = 0; i < ITERATIONS; ++i) {
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ASSERT_EQ(0, pthread_rwlock_rdlock(&lock));
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++reads;
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ASSERT_EQ(0, pthread_rwlock_unlock(&lock));
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}
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return 0;
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}
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int Writer(void *arg, int tid) {
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pthread_barrier_wait(&barrier);
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for (int i = 0; i < ITERATIONS; ++i) {
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ASSERT_EQ(0, pthread_rwlock_wrlock(&lock));
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++writes;
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ASSERT_EQ(0, pthread_rwlock_unlock(&lock));
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}
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return 0;
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}
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TEST(pthread_rwlock_rdlock, test) {
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int i;
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struct spawn *t = _gc(malloc(sizeof(struct spawn) * (READERS + WRITERS)));
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ASSERT_EQ(0, pthread_barrier_init(&barrier, 0, READERS + WRITERS));
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for (i = 0; i < READERS + WRITERS; ++i) {
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ASSERT_SYS(0, 0, _spawn(i < READERS ? Reader : Writer, 0, t + i));
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}
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for (i = 0; i < READERS + WRITERS; ++i) {
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EXPECT_SYS(0, 0, _join(t + i));
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}
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EXPECT_EQ(READERS * ITERATIONS, reads);
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EXPECT_EQ(WRITERS * ITERATIONS, writes);
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ASSERT_EQ(0, pthread_barrier_destroy(&barrier));
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}
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