a752c7ab
 elopes
add first test an...
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/*
* Copyright (C) 2014 Martine Lenders <mlenders@inf.fu-berlin.de>
* Copyright (C) 2015 Eistec AB
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
#include <limits.h>
#include <stdint.h>
#include <stdatomic.h>
#include "embUnit.h"
#include "tests-core.h"
/* Test atomic_flag back and forth */
static void test_atomic_flag(void)
{
atomic_flag flag = ATOMIC_FLAG_INIT;
TEST_ASSERT_EQUAL_INT(0, atomic_flag_test_and_set(&flag));
TEST_ASSERT_EQUAL_INT(1, atomic_flag_test_and_set(&flag));
atomic_flag_clear(&flag);
TEST_ASSERT_EQUAL_INT(0, atomic_flag_test_and_set(&flag));
}
/* Test atomic_fetch_add */
static void test_atomic_inc_positive(void)
{
atomic_int res = ATOMIC_VAR_INIT(0);
TEST_ASSERT_EQUAL_INT(0, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(1, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(1, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(2, atomic_load(&res));
atomic_store(&res, 0);
for (int i = 0; i < 512; ++i) {
TEST_ASSERT_EQUAL_INT(i, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(i + 1, atomic_load(&res));
}
}
static void test_atomic_inc_negative(void)
{
atomic_int res = ATOMIC_VAR_INIT(-99);
for (int i = -99; i < 123; ++i) {
TEST_ASSERT_EQUAL_INT(i, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(i + 1, atomic_load(&res));
}
}
static void test_atomic_inc_rollover(void)
{
atomic_int res = ATOMIC_VAR_INIT(INT_MAX - 30);
for (int i = 0; i < 30; ++i) {
TEST_ASSERT_EQUAL_INT(INT_MAX - 30 + i, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MAX - 30 + i + 1, atomic_load(&res));
}
TEST_ASSERT_EQUAL_INT(INT_MAX, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MIN, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(INT_MIN, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MIN + 1, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(INT_MIN + 1, atomic_fetch_add(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MIN + 2, atomic_load(&res));
}
/* Test atomic_fetch_sub */
static void test_atomic_dec_negative(void)
{
atomic_int res = ATOMIC_VAR_INIT(0);
TEST_ASSERT_EQUAL_INT(0, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(-1, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(-1, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(-2, atomic_load(&res));
atomic_store(&res, 0);
for (int i = 0; i < 512; ++i) {
TEST_ASSERT_EQUAL_INT(-i, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(-i - 1, atomic_load(&res));
}
}
static void test_atomic_dec_positive(void)
{
atomic_int res = ATOMIC_VAR_INIT(99);
for (int i = 99; i < -123; --i) {
TEST_ASSERT_EQUAL_INT(i, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(i - 1, atomic_load(&res));
}
}
static void test_atomic_dec_rollover(void)
{
atomic_int res = ATOMIC_VAR_INIT(INT_MIN + 30);
for (int i = 0; i < 30; ++i) {
TEST_ASSERT_EQUAL_INT(INT_MIN + 30 - i, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MIN + 30 - i - 1, atomic_load(&res));
}
TEST_ASSERT_EQUAL_INT(INT_MIN, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MAX, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(INT_MAX, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MAX - 1, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(INT_MAX - 1, atomic_fetch_sub(&res, 1));
TEST_ASSERT_EQUAL_INT(INT_MAX - 2, atomic_load(&res));
}
/* Test atomic_cas with a correct old value */
static void test_atomic_cas_same(void)
{
atomic_int res = ATOMIC_VAR_INIT(0);
int expected;
expected = 0;
TEST_ASSERT_EQUAL_INT(1, atomic_compare_exchange_weak(&res, &expected, 12345));
TEST_ASSERT_EQUAL_INT(12345, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(0, expected);
expected = 12345;
TEST_ASSERT_EQUAL_INT(1, atomic_compare_exchange_weak(&res, &expected, -9876));
TEST_ASSERT_EQUAL_INT(-9876, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(12345, expected);
expected = -9876;
TEST_ASSERT_EQUAL_INT(1, atomic_compare_exchange_weak(&res, &expected, -9876));
TEST_ASSERT_EQUAL_INT(-9876, atomic_load(&res));
TEST_ASSERT_EQUAL_INT(-9876, expected);
expected = -9876;
TEST_ASSERT_EQUAL_INT(1, atomic_compare_exchange_weak(&res, &expected, 0));
TEST_ASSERT_EQUAL_INT(0, atomic_load(&res));
}
/* Test atomic_cas with a non-matching old value */
static void test_atomic_cas_diff(void)
{
atomic_int res = ATOMIC_VAR_INIT(32767);
int expected;
expected = 22222;
TEST_ASSERT_EQUAL_INT(0, atomic_compare_exchange_weak(&res, &expected, 12345));
TEST_ASSERT_EQUAL_INT(32767, expected);
TEST_ASSERT_EQUAL_INT(32767, atomic_load(&res));
atomic_store(&res, -12345);
expected = 12345;
TEST_ASSERT_EQUAL_INT(0, atomic_compare_exchange_weak(&res, &expected, 12345));
TEST_ASSERT_EQUAL_INT(-12345, expected);
TEST_ASSERT_EQUAL_INT(-12345, atomic_load(&res));
expected = 12345;
TEST_ASSERT_EQUAL_INT(0, atomic_compare_exchange_weak(&res, &expected, 12345));
TEST_ASSERT_EQUAL_INT(-12345, expected);
TEST_ASSERT_EQUAL_INT(-12345, atomic_load(&res));
expected = 12345;
TEST_ASSERT_EQUAL_INT(0, atomic_compare_exchange_weak(&res, &expected, -12345));
TEST_ASSERT_EQUAL_INT(-12345, expected);
TEST_ASSERT_EQUAL_INT(-12345, atomic_load(&res));
}
/* Test atomic_load, atomic_store */
static void test_atomic_value(void)
{
atomic_int res = ATOMIC_VAR_INIT(12345);
TEST_ASSERT_EQUAL_INT(12345, atomic_load(&res));
atomic_store(&res, 24332);
TEST_ASSERT_EQUAL_INT(24332, atomic_load(&res));
}
/* ATOMIC_VAR_INIT is implicitly tested by the other tests */
Test *tests_core_atomic_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_atomic_flag),
new_TestFixture(test_atomic_inc_positive),
new_TestFixture(test_atomic_inc_negative),
new_TestFixture(test_atomic_inc_rollover),
new_TestFixture(test_atomic_dec_positive),
new_TestFixture(test_atomic_dec_negative),
new_TestFixture(test_atomic_dec_rollover),
new_TestFixture(test_atomic_cas_same),
new_TestFixture(test_atomic_cas_diff),
new_TestFixture(test_atomic_value),
};
EMB_UNIT_TESTCALLER(core_atomic_tests, NULL, NULL,
fixtures);
return (Test *)&core_atomic_tests;
}
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