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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "uv.h"
#include "task.h"
#include <string.h>
#include <errno.h>
typedef struct {
uv_barrier_t barrier;
unsigned delay;
unsigned niter;
unsigned main_barrier_wait_rval;
unsigned worker_barrier_wait_rval;
} worker_config;
static void worker(void* arg) {
worker_config* c = arg;
unsigned i;
if (c->delay)
uv_sleep(c->delay);
for (i = 0; i < c->niter; i++)
c->worker_barrier_wait_rval += uv_barrier_wait(&c->barrier);
}
TEST_IMPL(barrier_1) {
uv_thread_t thread;
worker_config wc;
memset(&wc, 0, sizeof(wc));
wc.niter = 1;
ASSERT_OK(uv_barrier_init(&wc.barrier, 2));
ASSERT_OK(uv_thread_create(&thread, worker, &wc));
uv_sleep(100);
wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
ASSERT_OK(uv_thread_join(&thread));
uv_barrier_destroy(&wc.barrier);
ASSERT_EQ(1, (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
return 0;
}
TEST_IMPL(barrier_2) {
uv_thread_t thread;
worker_config wc;
memset(&wc, 0, sizeof(wc));
wc.delay = 100;
wc.niter = 1;
ASSERT_OK(uv_barrier_init(&wc.barrier, 2));
ASSERT_OK(uv_thread_create(&thread, worker, &wc));
wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
ASSERT_OK(uv_thread_join(&thread));
uv_barrier_destroy(&wc.barrier);
ASSERT_EQ(1, (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
return 0;
}
TEST_IMPL(barrier_3) {
uv_thread_t thread;
worker_config wc;
unsigned i;
memset(&wc, 0, sizeof(wc));
wc.niter = 5;
ASSERT_OK(uv_barrier_init(&wc.barrier, 2));
ASSERT_OK(uv_thread_create(&thread, worker, &wc));
for (i = 0; i < wc.niter; i++)
wc.main_barrier_wait_rval += uv_barrier_wait(&wc.barrier);
ASSERT_OK(uv_thread_join(&thread));
uv_barrier_destroy(&wc.barrier);
ASSERT_EQ(wc.niter, wc.main_barrier_wait_rval + wc.worker_barrier_wait_rval);
return 0;
}
static void serial_worker(void* data) {
uv_barrier_t* barrier;
unsigned i;
barrier = data;
for (i = 0; i < 5; i++)
uv_barrier_wait(barrier);
if (uv_barrier_wait(barrier) > 0)
uv_barrier_destroy(barrier);
uv_sleep(100); /* Wait a bit before terminating. */
}
/* Ensure that uv_barrier_wait returns positive only after all threads have
* exited the barrier. If this value is returned too early and the barrier is
* destroyed prematurely, then this test may see a crash. */
TEST_IMPL(barrier_serial_thread) {
uv_thread_t threads[4];
uv_barrier_t barrier;
unsigned i;
ASSERT_OK(uv_barrier_init(&barrier, ARRAY_SIZE(threads) + 1));
for (i = 0; i < ARRAY_SIZE(threads); ++i)
ASSERT_OK(uv_thread_create(&threads[i], serial_worker, &barrier));
for (i = 0; i < 5; i++)
uv_barrier_wait(&barrier);
if (uv_barrier_wait(&barrier) > 0)
uv_barrier_destroy(&barrier);
for (i = 0; i < ARRAY_SIZE(threads); ++i)
ASSERT_OK(uv_thread_join(&threads[i]));
return 0;
}
/* Single thread uv_barrier_wait should return correct return value. */
TEST_IMPL(barrier_serial_thread_single) {
uv_barrier_t barrier;
ASSERT_OK(uv_barrier_init(&barrier, 1));
ASSERT_LT(0, uv_barrier_wait(&barrier));
uv_barrier_destroy(&barrier);
return 0;
}
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