utest: move cpp from examples to components/libc/cplusplus

Also update the case names to compatible with naming rules.

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>

components/libc/cplusplus/utest/Kconfig

@@ -0,0 +1,9 @@
+menu "CPP11 Testcase"
+
+config RT_UTEST_CPP11_THREAD
+    bool "Cpp11 thread test"
+    select RT_USING_CPLUSPLUS
+    select RT_USING_CPLUSPLUS11
+    default n
+
+endmenu

components/libc/cplusplus/utest/SConscript

@@ -0,0 +1,14 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = []
+CPPPATH = [cwd]
+
+if GetDepend('RT_UTEST_CPP11_THREAD'):
+    src += Glob('tc_*.cpp')
+
+group = DefineGroup('utestcases', src, depend = ['RT_USING_UTESTCASES', 'RT_USING_CPLUSPLUS'], CPPPATH = CPPPATH)
+
+Return('group')
+

components/libc/cplusplus/utest/tc_atomic.cpp

@@ -0,0 +1,271 @@
+/*
+ * Copyright (c) 2006-2025, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-09-19     Rbb666       the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <thread>
+#include <atomic>
+#include <cstdint>
+
+/**
+ * @brief Test load and store operations for int32_t atomic variables in multi-threaded environment.
+ *        Verifies atomicity by performing increment and decrement operations concurrently.
+ */
+static void test_atomic_load_store_int32(void)
+{
+    constexpr int        kRound = 10000000;
+    std::atomic<int32_t> thread_count(0);
+    std::atomic<int32_t> count(100);
+    uassert_int_equal(count.load(), 100);
+
+    auto func1 = [&]() mutable {
+        for (int i = 0; i < kRound; ++i)
+        {
+            ++count;
+        }
+        ++thread_count;
+    };
+
+    auto func2 = [&]() mutable {
+        for (int i = 0; i < kRound; ++i)
+        {
+            --count;
+        }
+        ++thread_count;
+    };
+
+    std::thread t1(func1);
+    std::thread t2(func2);
+    t1.join();
+    t2.join();
+
+    uassert_int_equal(count.load(), 100);
+    uassert_int_equal(thread_count.load(), 2);
+}
+
+/**
+ * @brief Test load and store operations for int64_t atomic variables in multi-threaded environment.
+ *        Verifies atomicity by performing increment and decrement operations concurrently.
+ */
+static void test_atomic_load_store_int64(void)
+{
+    constexpr int        kRound = 10000000;
+    std::atomic<int64_t> thread_count(0);
+    std::atomic<int64_t> count(100);
+    uassert_int_equal(count.load(), 100);
+
+    auto func1 = [&]() mutable {
+        for (int i = 0; i < kRound; ++i)
+        {
+            ++count;
+        }
+        ++thread_count;
+    };
+
+    auto func2 = [&]() mutable {
+        for (int i = 0; i < kRound; ++i)
+        {
+            --count;
+        }
+        ++thread_count;
+    };
+
+    std::thread t1(func1);
+    std::thread t2(func2);
+    t1.join();
+    t2.join();
+
+    uassert_int_equal(count.load(), 100);
+    uassert_int_equal(thread_count.load(), 2);
+}
+
+/**
+ * @brief Test basic atomic operations for int32_t, including load, store, fetch_add, fetch_sub,
+ *        fetch_and, fetch_or, fetch_xor, exchange, and compare_exchange_strong.
+ */
+static void test_atomic_basic_int32(void)
+{
+    std::atomic<int32_t> val;
+    val = 10;
+    uassert_int_equal(val.load(), 10);
+
+    val++;
+    uassert_int_equal(val.load(), 11);
+
+    val--;
+    uassert_int_equal(val.load(), 10);
+
+    auto a = val.load();
+    val.store(a);
+    val.fetch_add(1);
+    uassert_int_equal(val.load(), 11);
+    val.fetch_sub(1);
+    uassert_int_equal(val.load(), 10);
+
+    val.fetch_and(14);
+    uassert_int_equal(val.load(), 10);
+
+    val.fetch_or(11); //1010
+    uassert_int_equal(val.load(), 11);
+
+    val.fetch_xor(4);
+    uassert_int_equal(val.load(), 15);
+
+    val.exchange(1);
+    uassert_int_equal(val.load(), 1);
+
+    int32_t x         = 2;
+    int32_t y         = 3;
+    bool    exchanged = val.compare_exchange_strong(x, y);
+    uassert_false(exchanged);
+    uassert_int_equal(val.load(), 1);
+    uassert_int_equal(x, 1);
+    exchanged = val.compare_exchange_strong(x, y);
+    uassert_true(exchanged);
+    uassert_int_equal(val.load(), 3);
+    uassert_int_equal(x, 1);
+}
+
+/**
+ * @brief Test basic atomic operations for int64_t, including load, store, fetch_add, fetch_sub,
+ *        fetch_and, fetch_or, fetch_xor, exchange, and compare_exchange_strong.
+ */
+static void test_atomic_basic_int64(void)
+{
+    std::atomic<int64_t> val;
+    val = 10;
+    uassert_int_equal(val.load(), 10);
+
+    val++;
+    uassert_int_equal(val.load(), 11);
+
+    val--;
+    uassert_int_equal(val.load(), 10);
+
+    auto a = val.load();
+    val.store(a);
+    val.fetch_add(1);
+    uassert_int_equal(val.load(), 11);
+    val.fetch_sub(1);
+    uassert_int_equal(val.load(), 10);
+
+    val.fetch_and(14);
+    uassert_int_equal(val.load(), 10);
+
+    val.fetch_or(11); //1010
+    uassert_int_equal(val.load(), 11);
+
+    val.fetch_xor(4);
+    uassert_int_equal(val.load(), 15);
+
+    val.exchange(1);
+    uassert_int_equal(val.load(), 1);
+
+    int64_t x         = 2;
+    int64_t y         = 3;
+    bool    exchanged = val.compare_exchange_strong(x, y);
+    uassert_false(exchanged);
+    uassert_int_equal(val.load(), 1);
+    uassert_int_equal(x, 1);
+    exchanged = val.compare_exchange_strong(x, y);
+    uassert_true(exchanged);
+    uassert_int_equal(val.load(), 3);
+    uassert_int_equal(x, 1);
+}
+
+/**
+ * @brief Test atomic operations for bool type, including store, load, exchange, and compare_exchange_strong.
+ */
+static void test_atomic_bool(void)
+{
+    std::atomic<bool> flag(false);
+    flag.store(true);
+    uassert_true(flag.load());
+    flag.exchange(false);
+    uassert_false(flag.load());
+    bool expected = false;
+    bool desired  = true;
+    uassert_true(flag.compare_exchange_strong(expected, desired));
+    uassert_true(flag.load());
+}
+
+/**
+ * @brief Test atomic operations for pointer type (int*), including store, load, and exchange.
+ */
+static void test_atomic_pointer(void)
+{
+    int                a = 1, b = 2;
+    std::atomic<int *> ptr(&a);
+    ptr.store(&b);
+    uassert_int_equal(*ptr.load(), 2);
+    int *old = ptr.exchange(&a);
+    uassert_ptr_equal(old, &b);
+    uassert_int_equal(*ptr.load(), 1);
+}
+
+/**
+ * @brief Test memory ordering constraints using memory_order_release and memory_order_acquire.
+ */
+static void test_memory_order(void)
+{
+    std::atomic<int> x(0);
+    std::atomic<int> y(0);
+    // Simple test for memory order
+    x.store(1, std::memory_order_release);
+    y.store(2, std::memory_order_release);
+    uassert_int_equal(x.load(std::memory_order_acquire), 1);
+    uassert_int_equal(y.load(std::memory_order_acquire), 2);
+}
+
+/**
+ * @brief Test compare_exchange_weak operation, which may fail spuriously and requires looping.
+ */
+static void test_compare_exchange_weak(void)
+{
+    std::atomic<int> val(1);
+    int              expected = 1;
+    int              desired  = 2;
+    while (!val.compare_exchange_weak(expected, desired))
+    {
+        expected = 1; // reset
+    }
+    uassert_int_equal(val.load(), 2);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    /* Test load and store operations for int32_t atomic variables in multi-threaded environment */
+    UTEST_UNIT_RUN(test_atomic_load_store_int32);
+    /* Test load and store operations for int64_t atomic variables in multi-threaded environment */
+    UTEST_UNIT_RUN(test_atomic_load_store_int64);
+    /* Test basic atomic operations for int32_t */
+    UTEST_UNIT_RUN(test_atomic_basic_int32);
+    /* Test basic atomic operations for int64_t */
+    UTEST_UNIT_RUN(test_atomic_basic_int64);
+    /* Test atomic operations for bool type */
+    UTEST_UNIT_RUN(test_atomic_bool);
+    /* Test atomic operations for pointer type */
+    UTEST_UNIT_RUN(test_atomic_pointer);
+    /* Test memory ordering constraints */
+    UTEST_UNIT_RUN(test_memory_order);
+    /* Test compare_exchange_weak operation */
+    UTEST_UNIT_RUN(test_compare_exchange_weak);
+}
+UTEST_TC_EXPORT(testcase, "components.libc.cpp.atomic_tc", utest_tc_init, utest_tc_cleanup, 10);

components/libc/cplusplus/utest/tc_auto.cpp

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2006-2025, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-09-19     Rbb666       the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <vector>
+
+/**
+ * @brief Test auto keyword.
+ */
+static void test_auto(void)
+{
+    auto x = 42;
+    auto y = 3.14;
+    if (x != 42 || y != 3.14)
+    {
+        uassert_false(true);
+    }
+    uassert_true(true);
+}
+
+/**
+ * @brief Test range-based for loop.
+ */
+static void test_range_for(void)
+{
+    std::vector<int> v = {1, 2, 3, 4, 5};
+    int sum = 0;
+    for (auto i : v)
+    {
+        sum += i;
+    }
+    if (sum != 15)
+    {
+        uassert_false(true);
+    }
+    uassert_true(true);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    /* Test auto keyword */
+    UTEST_UNIT_RUN(test_auto);
+    /* Test range-based for loop */
+    UTEST_UNIT_RUN(test_range_for);
+}
+UTEST_TC_EXPORT(testcase, "components.libc.cpp.auto_tc", utest_tc_init, utest_tc_cleanup, 10);

components/libc/cplusplus/utest/tc_lambda.cpp

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2006-2025, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-09-19     Rbb666       the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+
+/**
+ * @brief Test basic lambda expression.
+ */
+static void test_lambda_basic(void)
+{
+    auto lambda = []() { return 42; };
+    if (lambda() != 42)
+    {
+        uassert_false(true);
+    }
+    uassert_true(true);
+}
+
+/**
+ * @brief Test lambda with capture.
+ */
+static void test_lambda_capture(void)
+{
+    int x = 10;
+    auto lambda = [x]() { return x * 2; };
+    if (lambda() != 20)
+    {
+        uassert_false(true);
+    }
+    uassert_true(true);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    /* Test basic lambda expression */
+    UTEST_UNIT_RUN(test_lambda_basic);
+    /* Test lambda with capture */
+    UTEST_UNIT_RUN(test_lambda_capture);
+}
+UTEST_TC_EXPORT(testcase, "components.libc.cpp.lambda_tc", utest_tc_init, utest_tc_cleanup, 10);

components/libc/cplusplus/utest/tc_mutex.cpp

@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2006-2025, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-09-19     Rbb666       the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <thread>
+#include <mutex>
+#include <chrono>
+
+/**
+ * @brief Test basic mutex operations with lock_guard.
+ */
+static void test_mutex(void)
+{
+    std::mutex m;
+    int        count = 0;
+    auto       func  = [&]() mutable {
+        std::lock_guard<std::mutex> lock(m);
+        for (int i = 0; i < 1000; ++i)
+        {
+            ++count;
+        }
+    };
+
+    std::thread t1(func);
+    std::thread t2(func);
+
+    t1.join();
+    t2.join();
+
+    uassert_int_equal(count, 2000);
+}
+
+/**
+ * @brief Test recursive mutex allowing multiple locks by the same thread.
+ */
+static void test_recursive_mutex(void)
+{
+    std::recursive_mutex rm;
+    int                  count = 0;
+    auto                 func  = [&]() mutable {
+        std::lock_guard<std::recursive_mutex> lock1(rm);
+        std::lock_guard<std::recursive_mutex> lock2(rm);
+        for (int i = 0; i < 1000; ++i)
+        {
+            ++count;
+        }
+    };
+
+    std::thread t1(func);
+    std::thread t2(func);
+
+    t1.join();
+    t2.join();
+
+    if (count != 2000)
+    {
+        uassert_false(true);
+    }
+    uassert_true(true);
+}
+
+/**
+ * @brief Test try_lock on mutex.
+ */
+static void test_try_lock(void)
+{
+    std::mutex m;
+    if (m.try_lock())
+    {
+        m.unlock();
+        uassert_true(true);
+    }
+    else
+    {
+        uassert_false(true);
+    }
+}
+
+/**
+ * @brief Test locking multiple mutexes with std::lock.
+ */
+static void test_lock_multiple(void)
+{
+    std::mutex m1, m2;
+    std::lock(m1, m2);
+    m1.unlock();
+    m2.unlock();
+    uassert_true(true);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    /* Test basic mutex operations with lock_guard */
+    UTEST_UNIT_RUN(test_mutex);
+    /* Test recursive mutex allowing multiple locks by the same thread */
+    UTEST_UNIT_RUN(test_recursive_mutex);
+    /* Test try_lock on mutex */
+    UTEST_UNIT_RUN(test_try_lock);
+    /* Test locking multiple mutexes with std::lock */
+    UTEST_UNIT_RUN(test_lock_multiple);
+}
+UTEST_TC_EXPORT(testcase, "components.libc.cpp.mutex_tc", utest_tc_init, utest_tc_cleanup, 10);

components/libc/cplusplus/utest/tc_smartptr.cpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2006-2025, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-09-19     Rbb666       the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <memory>
+
+/**
+ * @brief Test unique_ptr basic operations.
+ */
+static void test_unique_ptr(void)
+{
+    std::unique_ptr<int> p(new int(42));
+    uassert_int_equal(*p, 42);
+    *p = 24;
+    uassert_int_equal(*p, 24);
+}
+
+/**
+ * @brief Test shared_ptr basic operations.
+ */
+static void test_shared_ptr(void)
+{
+    std::shared_ptr<int> p1(new int(42));
+    std::shared_ptr<int> p2 = p1;
+    uassert_int_equal(*p1, 42);
+    uassert_int_equal(*p2, 42);
+    uassert_int_equal(p1.use_count(), 2);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    /* Test unique_ptr basic operations */
+    UTEST_UNIT_RUN(test_unique_ptr);
+    /* Test shared_ptr basic operations */
+    UTEST_UNIT_RUN(test_shared_ptr);
+}
+UTEST_TC_EXPORT(testcase, "components.libc.cpp.smartptr_tc", utest_tc_init, utest_tc_cleanup, 10);

components/libc/cplusplus/utest/tc_thread.cpp

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-09-03     liukang      the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <thread>
+
+static void test_thread(void)
+{
+    int count = 0;
+    auto func = [&]() mutable
+    {
+        for (int i = 0; i < 100; ++i)
+        {
+            ++count;
+        }
+    };
+
+    std::thread t1(func);
+    t1.join();
+
+    if (count != 100)
+    {
+        uassert_false(1);
+    }
+
+    std::thread t2(func);
+    t2.join();
+
+    if (count != 200)
+    {
+        uassert_false(1);
+    }
+
+    uassert_true(1);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_thread);
+}
+UTEST_TC_EXPORT(testcase, "components.libc.cpp.thread_tc", utest_tc_init, utest_tc_cleanup, 10);