Add <mstd_xxx> C++ headers

.astyleignore

@@ -20,6 +20,7 @@
 ^features/storage/filesystem/littlefs/littlefs/
 ^features/unsupported/
 ^hal/storage_abstraction
+^platform/cxxsupport
 ^rtos/TARGET_CORTEX/rtx4
 ^rtos/TARGET_CORTEX/rtx5
 ^targets

TESTS/mbed_platform/atomic/main.cpp

@@ -18,6 +18,8 @@
 #include "unity/unity.h"
 #include "utest/utest.h"
 
+#include <mstd_atomic>
+
 #if !MBED_CONF_RTOS_PRESENT
 #error [NOT_SUPPORTED] test not supported
 #endif
@@ -28,6 +30,8 @@ using utest::v1::Case;
 
 namespace {
 
+using mstd::atomic;
+
 /* Lock-free operations will be much faster - keep runtime down */
 #define ADD_UNLOCKED_ITERATIONS (SystemCoreClock / 1000)
 #define ADD_LOCKED_ITERATIONS   (SystemCoreClock / 8000)
@@ -53,7 +57,7 @@ struct add_release_incrementer {
     static void op(A *ptr)
     {
         for (long i = add_iterations(*ptr); i > 0; i--) {
-            ptr->fetch_add(1, mbed::memory_order_release);
+            ptr->fetch_add(1, mstd::memory_order_release);
         }
     }
 };
@@ -120,8 +124,8 @@ void test_atomic_add()
 {
     struct  {
         volatile T nonatomic1;
-        Atomic<T> atomic1;
-        volatile Atomic<T> atomic2; // use volatile just to exercise the templates' volatile methods
+        atomic<T> atomic1;
+        volatile atomic<T> atomic2; // use volatile just to exercise the templates' volatile methods
         volatile T nonatomic2;
     } data = { 0, { 0 }, { 1 }, 0 }; // test initialisation
 
@@ -201,17 +205,17 @@ void struct_incrementer_b(A *data)
 template<typename T, size_t N>
 void test_atomic_struct()
 {
-    TEST_ASSERT_EQUAL(N, sizeof(Atomic<T>));
+    TEST_ASSERT_EQUAL(N, sizeof(atomic<T>));
 
     // Small structures don't have value constructor implemented;
-    Atomic<T> data;
+    atomic<T> data;
     atomic_init(&data, T{0, 0, 0});
 
     Thread t1(osPriorityNormal, THREAD_STACK);
     Thread t2(osPriorityNormal, THREAD_STACK);
 
-    TEST_ASSERT_EQUAL(osOK, t1.start(callback(struct_incrementer_a<Atomic<T> >, &data)));
-    TEST_ASSERT_EQUAL(osOK, t2.start(callback(struct_incrementer_b<Atomic<T> >, &data)));
+    TEST_ASSERT_EQUAL(osOK, t1.start(callback(struct_incrementer_a<atomic<T> >, &data)));
+    TEST_ASSERT_EQUAL(osOK, t2.start(callback(struct_incrementer_b<atomic<T> >, &data)));
 
     for (long i = add_iterations(data); i > 0; i--) {
         T curval = data, newval;

UNITTESTS/CMakeLists.txt

@@ -95,6 +95,7 @@ set(unittest-includes-base
   "${PROJECT_SOURCE_DIR}/target_h/events"
   "${PROJECT_SOURCE_DIR}/target_h/events/equeue"
   "${PROJECT_SOURCE_DIR}/target_h/platform"
+  "${PROJECT_SOURCE_DIR}/target_h/platform/cxxsupport"
   "${PROJECT_SOURCE_DIR}/target_h/drivers"
   "${PROJECT_SOURCE_DIR}/stubs"
   "${PROJECT_SOURCE_DIR}/.."

UNITTESTS/target_h/platform/cxxsupport/mstd_algorithm

@@ -0,0 +1,110 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+#ifndef MSTD_ALGORITHM_
+#define MSTD_ALGORITHM_
+
+/* <mstd_algorithm>
+ *
+ * - provides <algorithm>
+ * - For ARM C 5, standard C++11/14 features:
+ *   - std::min, std::max for std::initializer_list
+ *   - std::all_of, std::any_of, std::none_of
+ *   - std::find_if_not
+ *   - std::equal (2-range forms)
+ *   - std::copy_n, std::move, std::move_backward
+ *   - mstd::min, mstd::max constexpr replacements
+ */
+
+#include <algorithm>
+
+namespace mstd {
+using std::min;
+using std::max;
+using std::minmax;
+using std::initializer_list;
+using std::all_of;
+using std::any_of;
+using std::none_of;
+using std::for_each;
+using std::find;
+using std::find_if;
+using std::find_if_not;
+using std::find_end;
+using std::find_first_of;
+using std::adjacent_find;
+using std::count;
+using std::count_if;
+using std::mismatch;
+using std::equal;
+using std::search;
+using std::search_n;
+using std::copy;
+using std::copy_n;
+using std::copy_if;
+using std::move;
+using std::move_backward;
+using std::swap_ranges;
+using std::iter_swap;
+using std::transform;
+using std::replace;
+using std::replace_if;
+using std::replace_copy;
+using std::replace_copy_if;
+using std::fill;
+using std::fill_n;
+using std::generate;
+using std::generate_n;
+using std::remove;
+using std::remove_if;
+using std::remove_copy;
+using std::remove_copy_if;
+using std::unique;
+using std::unique_copy;
+using std::reverse;
+using std::reverse_copy;
+using std::rotate;
+using std::rotate_copy;
+using std::partition;
+using std::stable_partition;
+using std::sort;
+using std::stable_sort;
+using std::partial_sort;
+using std::partial_sort_copy;
+using std::nth_element;
+using std::lower_bound;
+using std::upper_bound;
+using std::equal_range;
+using std::binary_search;
+using std::merge;
+using std::inplace_merge;
+using std::includes;
+using std::set_union;
+using std::set_intersection;
+using std::set_difference;
+using std::set_symmetric_difference;
+using std::push_heap;
+using std::pop_heap;
+using std::make_heap;
+using std::sort_heap;
+using std::min_element;
+using std::max_element;
+using std::lexicographical_compare;
+using std::next_permutation;
+using std::prev_permutation;
+}
+
+#endif // MSTD_ALGORITHM_

UNITTESTS/target_h/platform/cxxsupport/mstd_atomic

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+#ifndef MSTD_ATOMIC_
+#define MSTD_ATOMIC_
+
+#include <atomic>
+
+namespace mstd {
+using std::atomic;
+using std::atomic_is_lock_free;
+using std::atomic_store;
+using std::atomic_store_explicit;
+using std::atomic_load;
+using std::atomic_load_explicit;
+using std::atomic_exchange;
+using std::atomic_exchange_explicit;
+using std::atomic_compare_exchange_weak;
+using std::atomic_compare_exchange_weak_explicit;
+using std::atomic_compare_exchange_strong;
+using std::atomic_compare_exchange_strong_explicit;
+using std::atomic_fetch_add;
+using std::atomic_fetch_add_explicit;
+using std::atomic_fetch_sub;
+using std::atomic_fetch_sub_explicit;
+using std::atomic_fetch_and;
+using std::atomic_fetch_and_explicit;
+using std::atomic_fetch_or;
+using std::atomic_fetch_or_explicit;
+using std::atomic_fetch_xor;
+using std::atomic_fetch_xor_explicit;
+using std::atomic_flag;
+using std::atomic_flag_test_and_set;
+using std::atomic_flag_test_and_set_explicit;
+using std::atomic_flag_clear;
+using std::atomic_flag_clear_explicit;
+using std::atomic_init;
+using std::memory_order;
+using std::kill_dependency;
+using std::atomic_thread_fence;
+using std::atomic_signal_fence;
+}
+
+#endif

UNITTESTS/target_h/platform/cxxsupport/mstd_cstddef

@@ -0,0 +1,54 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+#ifndef MSTD_CSTDDEF_
+#define MSTD_CSTDDEF_
+
+/* <mstd_cstddef>
+ *
+ * - provides <cstddef>
+ * - For ARM C 5, standard C++11/14 features:
+ * - - adds macro replacements for alignof and alignas keywords
+ * - - adds missing std::nullptr_t
+ * - For all toolchains:
+ * - - MSTD_CONSTEXPR_XX_14 macros that can be used to mark
+ *     things that are valid as constexpr only for C++14 or later,
+ *     permitting constexpr use where ARM C 5 would reject it.
+ */
+
+#include <cstddef>
+
+/* Macros that can be used to mark functions and objects that are
+ * constexpr in C++14 or later, but not in earlier versions.
+ */
+#if __cplusplus >= 201402
+#define MSTD_CONSTEXPR_FN_14 constexpr
+#define MSTD_CONSTEXPR_OBJ_14 constexpr
+#else
+#define MSTD_CONSTEXPR_FN_14 inline
+#define MSTD_CONSTEXPR_OBJ_14 const
+#endif
+
+namespace mstd
+{
+using std::size_t;
+using std::ptrdiff_t;
+using std::nullptr_t;
+using std::max_align_t;
+
+}
+
+#endif // MSTD_CSTDDEF_