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/*************************************************************************
* Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Test Suite. *
* *
* The Dimension Test Suite 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. *
* *
* The Dimension Test Suite 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/>. *
*************************************************************************/
/**
* @file
* Tests for dmnsn_future.
*/
#include "../platform.c"
#include "../future.c"
#include "../threads.c"
#include "tests.h"
#include <stdatomic.h>
static dmnsn_future *future;
static atomic_int counter = ATOMIC_VAR_INIT(0);
static const int NTHREADS = 8;
static const int CHUNK = 100;
static int
dmnsn_future_test_ccthread(void *ptr, unsigned int thread, unsigned int nthreads)
{
for (int i = 0; i < CHUNK; ++i) {
for (int j = 0; j < CHUNK; ++j) {
atomic_fetch_add(&counter, 1);
}
dmnsn_future_increment(future);
}
return 0;
}
static int
dmnsn_future_test_thread(void *ptr)
{
dmnsn_future_set_total(future, NTHREADS*CHUNK);
return dmnsn_execute_concurrently(future, dmnsn_future_test_ccthread, ptr, NTHREADS);
}
DMNSN_TEST_SETUP(future)
{
future = dmnsn_new_future();
dmnsn_new_thread(future, dmnsn_future_test_thread, NULL);
}
DMNSN_TEST_TEARDOWN(future)
{
int res = dmnsn_future_join(future);
ck_assert_int_eq(res, 0);
}
void *
dmnsn_future_pause_and_check(void *ptr)
{
for (int i = 0; i < CHUNK; ++i) {
dmnsn_future_pause(future);
int value = atomic_load(&counter);
ck_assert_int_eq(value%CHUNK, 0);
for (int j = 0; j < CHUNK; ++j) {
int new_value = atomic_load(&counter);
ck_assert_int_eq(new_value, value);
}
dmnsn_future_resume(future);
}
return NULL;
}
DMNSN_TEST(future, pause_safely)
{
// Check dmnsn_future_pause() behaviour from two concurrent threads
pthread_t thread;
if (pthread_create(&thread, NULL, dmnsn_future_pause_and_check, NULL) != 0) {
dmnsn_error("Couldn't start thread.");
}
dmnsn_future_pause_and_check(NULL);
dmnsn_join_thread(thread, NULL);
}
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