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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* CMetrics
* ========
* Copyright 2021-2022 The CMetrics Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cmetrics/cmetrics.h>
#include <cmetrics/cmt_atomic.h>
#if defined (_WIN32) || defined (_WIN64)
#include <windows.h>
#else
#include <pthread.h>
#endif
#include "cmt_tests.h"
#define THREAD_COUNT 100
#define CYCLE_COUNT 10000
#define EXPECTED_VALUE (THREAD_COUNT * CYCLE_COUNT)
uint64_t global_counter;
static inline void add_through_compare_exchange(uint64_t val)
{
uint64_t old;
uint64_t new;
int result;
do {
old = global_counter;
new = old + val;
result = cmt_atomic_compare_exchange(&global_counter, old, new);
}
while(0 == result);
}
void *worker_thread_add_through_compare_exchange(void *ptr)
{
int local_counter;
for (local_counter = 0 ; local_counter < CYCLE_COUNT ; local_counter++) {
add_through_compare_exchange(1);
}
return NULL;
}
#if defined (_WIN32) || defined (_WIN64)
void test_atomic_operations()
{
HANDLE threads[THREAD_COUNT];
DWORD thread_ids[THREAD_COUNT];
int thread_index;
DWORD result;
cmt_initialize();
global_counter = 0;
for(thread_index = 0 ; thread_index < THREAD_COUNT ; thread_index++)
{
threads[thread_index] = CreateThread(NULL, 0,
(LPTHREAD_START_ROUTINE) worker_thread_add_through_compare_exchange,
NULL, 0, &thread_ids[thread_index]);
}
for(thread_index = 0 ; thread_index < THREAD_COUNT ; thread_index++)
{
result = WaitForSingleObject(threads[thread_index], INFINITE);
}
TEST_CHECK(global_counter == EXPECTED_VALUE);
}
#else
void test_atomic_operations()
{
pthread_t threads[THREAD_COUNT];
int thread_index;
cmt_initialize();
global_counter = 0;
for(thread_index = 0 ; thread_index < THREAD_COUNT ; thread_index++)
{
pthread_create(&threads[thread_index], NULL,
worker_thread_add_through_compare_exchange, NULL);
}
for(thread_index = 0 ; thread_index < THREAD_COUNT ; thread_index++)
{
pthread_join(threads[thread_index], NULL);
}
TEST_CHECK(global_counter == EXPECTED_VALUE);
}
#endif
TEST_LIST = {
{"atomic_operations", test_atomic_operations},
{ 0 }
};
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