etl/test/test_atomic_gcc_sync.cpp

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Embedded Template Library.
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#include "UnitTest++/UnitTest++.h"

#include "etl/platform.h"
#include "etl/atomic/atomic_gcc_sync.h"

#include <atomic>
#include <thread>

#define REALTIME_TEST 1

namespace
{
  SUITE(test_atomic_std)
  {
    //=========================================================================
    TEST(test_atomic_integer_is_lock_free)
    {
      std::atomic<int> compare;
      etl::atomic<int> test;

      CHECK_EQUAL(compare.is_lock_free(), test.is_lock_free());
    }

    //=========================================================================
    TEST(test_atomic_pointer_is_lock_free)
    {
      std::atomic<int*> compare;
      etl::atomic<int*> test;

      CHECK_EQUAL(compare.is_lock_free(), test.is_lock_free());
    }

    //=========================================================================
    TEST(test_atomic_integer_load)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)compare.load(), (int)test.load());
    }

    //=========================================================================
    TEST(test_atomic_pointer_load)
    {
      int i;

      std::atomic<int*> compare(&i);
      etl::atomic<int*> test(&i);

      CHECK_EQUAL((int*)compare.load(), (int*)test.load());
    }

    //=========================================================================
    TEST(test_atomic_integer_store)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      compare.store(2);
      test.store(2);
      CHECK_EQUAL((int)compare.load(), (int)test.load());
    }

    //=========================================================================
    TEST(test_atomic_pointer_store)
    {
      int i;
      int j;

      std::atomic<int*> compare(&i);
      etl::atomic<int*> test(&i);

      compare.store(&j);
      test.store(&j);
      CHECK_EQUAL((int*)compare.load(), (int*)test.load());
    }

    //=========================================================================
    TEST(test_atomic_integer_assignment)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      compare = 2;
      test = 2;
      CHECK_EQUAL((int)compare.load(), (int)test.load());
    }

    //=========================================================================
    TEST(test_atomic_pointer_assignment)
    {
      int i;
      int j;

      std::atomic<int*> compare(&i);
      etl::atomic<int*> test(&i);

      compare = &j;
      test = &j;
      CHECK_EQUAL((int*)compare.load(), (int*)test.load());
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_pre_increment)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)++compare, (int)++test);
      CHECK_EQUAL((int)++compare, (int)++test);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_post_increment)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)compare++, (int)test++);
      CHECK_EQUAL((int)compare++, (int)test++);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_pre_decrement)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)--compare, (int)--test);
      CHECK_EQUAL((int)--compare, (int)--test);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_post_decrement)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)compare--, (int)test--);
      CHECK_EQUAL((int)compare--, (int)test--);
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_pre_increment)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[0]);
      etl::atomic<int*> test(&data[0]);

        CHECK_EQUAL((int*)++compare, (int*)++test);
        CHECK_EQUAL((int*)++compare, (int*)++test);
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_post_increment)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[0]);
      etl::atomic<int*> test(&data[0]);

      CHECK_EQUAL((int*)compare++, (int*)test++);
      CHECK_EQUAL((int*)compare++, (int*)test++);
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_pre_decrement)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[3]);
      etl::atomic<int*> test(&data[3]);

      CHECK_EQUAL((int*)--compare, (int*)--test);
      CHECK_EQUAL((int*)--compare, (int*)--test);
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_post_decrement)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[3]);
      etl::atomic<int*> test(&data[3]);

      CHECK_EQUAL((int*)compare--, (int*)test--);
      CHECK_EQUAL((int*)compare--, (int*)test--);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_fetch_add)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)compare.fetch_add(2), (int)test.fetch_add(2));
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_fetch_add)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[0]);
      etl::atomic<int*> test(&data[0]);

      CHECK_EQUAL((int*)compare.fetch_add(std::ptrdiff_t(10)), (int*)test.fetch_add(std::ptrdiff_t(10)));
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_plus_equals)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      compare += 2;
      test += 2;

      CHECK_EQUAL((int)compare, (int)test);
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_plus_equals)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[0]);
      etl::atomic<int*> test(&data[0]);

      compare += 2;
      test += 2;

      CHECK_EQUAL((int*)compare, (int*)test);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_minus_equals)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      compare -= 2;
      test -= 2;

      CHECK_EQUAL((int)compare, (int)test);
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_minus_equals)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[3]);
      etl::atomic<int*> test(&data[3]);

      compare -= 2;
      test -= 2;

      CHECK_EQUAL((int*)compare, (int*)test);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_and_equals)
    {
      std::atomic<int> compare(0x0000FFFF);
      etl::atomic<int> test(0x0000FFFF);

      compare &= 0x55AA55AA;
      test &= 0x55AA55AA;

      CHECK_EQUAL((int)compare, (int)test);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_or_equals)
    {
      std::atomic<int> compare(0x0000FFFF);
      etl::atomic<int> test(0x0000FFFF);

      compare |= 0x55AA55AA;
      test |= 0x55AA55AA;

      CHECK_EQUAL((int)compare, (int)test);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_xor_equals)
    {
      std::atomic<int> compare(0x0000FFFF);
      etl::atomic<int> test(0x0000FFFF);

      compare ^= 0x55AA55AA;
      test ^= 0x55AA55AA;

      CHECK_EQUAL((int)compare, (int)test);
    }

    //=========================================================================
    TEST(test_atomic_operator_integer_fetch_sub)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)compare.fetch_sub(2), (int)test.fetch_sub(2));
    }

    //=========================================================================
    TEST(test_atomic_operator_pointer_fetch_sub)
    {
      int data[] = { 1, 2, 3, 4 };

      std::atomic<int*> compare(&data[0]);
      etl::atomic<int*> test(&data[0]);

      CHECK_EQUAL((int*)compare.fetch_add(std::ptrdiff_t(10)), (int*)test.fetch_add(std::ptrdiff_t(10)));
    }

    //=========================================================================
    TEST(test_atomic_operator_fetch_and)
    {
      std::atomic<int> compare(0xFFFFFFFF);
      etl::atomic<int> test(0xFFFFFFFF);

      CHECK_EQUAL((int)compare.fetch_and(0x55AA55AA), (int)test.fetch_and(0x55AA55AA));
    }

    //=========================================================================
    TEST(test_atomic_operator_fetch_or)
    {
      std::atomic<int> compare(0x0000FFFF);
      etl::atomic<int> test(0x0000FFFF);

      CHECK_EQUAL((int)compare.fetch_or(0x55AA55AA), (int)test.fetch_or(0x55AA55AA));
    }

    //=========================================================================
    TEST(test_atomic_operator_fetch_xor)
    {
      std::atomic<int> compare(0x0000FFFF);
      etl::atomic<int> test(0x0000FFFF);

      CHECK_EQUAL((int)compare.fetch_xor(0x55AA55AA), (int)test.fetch_xor(0x55AA55AA));
    }

    //=========================================================================
    TEST(test_atomic_integer_exchange)
    {
      std::atomic<int> compare(1);
      etl::atomic<int> test(1);

      CHECK_EQUAL((int)compare.exchange(2), (int)test.exchange(2));
    }

    //=========================================================================
    TEST(test_atomic_pointer_exchange)
    {
      int i;
      int j;

      std::atomic<int*> compare(&i);
      etl::atomic<int*> test(&i);

      CHECK_EQUAL((int*)compare.exchange(&j), (int*)test.exchange(&j));
    }

    //=========================================================================
    TEST(test_atomic_compare_exchange_weak_fail)
    {
      std::atomic<int> compare;
      etl::atomic<int> test;

      int actual = 1U;

      compare = actual;
      test    = actual;

      int compare_expected = 2U;
      int test_expected    = 2U;
      int desired  = 3U;

      bool compare_result = compare.compare_exchange_weak(compare_expected, desired);
      bool test_result    = test.compare_exchange_weak(test_expected, desired);

      CHECK_EQUAL(compare_result,   test_result);
      CHECK_EQUAL(compare_expected, test_expected);
      CHECK_EQUAL(compare.load(),   test.load());
    }

    //=========================================================================
    TEST(test_atomic_compare_exchange_weak_pass)
    {
      std::atomic<int> compare;
      etl::atomic<int> test;

      int actual = 1U;

      compare = actual;
      test    = actual;

      int compare_expected = actual;
      int test_expected    = actual;
      int desired  = 3U;

      bool compare_result = compare.compare_exchange_weak(compare_expected, desired);
      bool test_result    = test.compare_exchange_weak(test_expected, desired);

      CHECK_EQUAL(compare_result,   test_result);
      CHECK_EQUAL(compare_expected, test_expected);
      CHECK_EQUAL(compare.load(),   test.load());
    }

    //=========================================================================
    TEST(test_atomic_compare_exchange_strong_fail)
    {
      std::atomic<int> compare;
      etl::atomic<int> test;

      int actual = 1U;

      compare = actual;
      test = actual;

      int compare_expected = 2U;
      int test_expected = 2U;
      int desired = 3U;

      bool compare_result = compare.compare_exchange_strong(compare_expected, desired);
      bool test_result = test.compare_exchange_strong(test_expected, desired);

      CHECK_EQUAL(compare_result, test_result);
      CHECK_EQUAL(compare_expected, test_expected);
      CHECK_EQUAL(compare.load(), test.load());
    }

    //=========================================================================
    TEST(test_atomic_compare_exchange_strong_pass)
    {
      std::atomic<int> compare;
      etl::atomic<int> test;

      int actual = 1U;

      compare = actual;
      test = actual;

      int compare_expected = actual;
      int test_expected = actual;
      int desired = 3U;

      bool compare_result = compare.compare_exchange_strong(compare_expected, desired);
      bool test_result = test.compare_exchange_strong(test_expected, desired);

      CHECK_EQUAL(compare_result, test_result);
      CHECK_EQUAL(compare_expected, test_expected);
      CHECK_EQUAL(compare.load(), test.load());
    }

    //=========================================================================
    #if REALTIME_TEST
    etl::atomic_int32_t atomic_value = 0U;
    etl::atomic<int>    atomic_flag  = false;

    void thread1()
    {
      while (!atomic_flag.load());

      for (int i = 0; i < 10000000; ++i)
      {
        ++atomic_value;
      }
    }

    void thread2()
    {
      while (!atomic_flag.load());

      for (int i = 0; i < 10000000; ++i)
      {
        --atomic_value;
      }
    }

    TEST(test_atomic_multi_thread)
    {
      std::thread t1(thread1);
      std::thread t2(thread2);

      atomic_flag.store(true);

      t1.join();
      t2.join();

      CHECK_EQUAL(0, atomic_value.load());
    }
    #endif
  };
}