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Merge pull request #7815 from donatieng/shared_ptr
Re-add Shared Pointer Class into platform features
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/* mbed Microcontroller Library | ||
* Copyright (c) 2018 ARM Limited | ||
* | ||
* 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 "mbed.h" | ||
#include "greentea-client/test_env.h" | ||
#include "utest/utest.h" | ||
#include "unity/unity.h" | ||
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#include "platform/SharedPtr.h" | ||
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using utest::v1::Case; | ||
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struct TestStruct { | ||
TestStruct() | ||
{ | ||
s_count++; | ||
value = 42; | ||
} | ||
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~TestStruct() | ||
{ | ||
s_count--; | ||
value = 0; | ||
} | ||
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int value; | ||
static int s_count; | ||
}; | ||
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int TestStruct::s_count = 0; | ||
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/** | ||
* Test that a shared pointer correctly manages the lifetime of the underlying raw pointer | ||
*/ | ||
void test_single_sharedptr_lifetime() | ||
{ | ||
// Sanity-check value of counter | ||
TEST_ASSERT_EQUAL(0, TestStruct::s_count); | ||
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// Create and destroy shared pointer in given scope | ||
{ | ||
SharedPtr<TestStruct> s_ptr(new TestStruct); | ||
TEST_ASSERT_EQUAL(1, TestStruct::s_count); | ||
} | ||
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// Destroy shared pointer | ||
TEST_ASSERT_EQUAL(0, TestStruct::s_count); | ||
} | ||
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/** | ||
* Test that multiple instances of shared pointers correctly manage the reference count | ||
* to release the object at the correct point | ||
*/ | ||
void test_instance_sharing() | ||
{ | ||
SharedPtr<TestStruct> s_ptr1(NULL); | ||
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// Sanity-check value of counter | ||
TEST_ASSERT_EQUAL(0, TestStruct::s_count); | ||
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// Create and destroy shared pointer in given scope | ||
{ | ||
SharedPtr<TestStruct> s_ptr2(new TestStruct); | ||
TEST_ASSERT_EQUAL(1, TestStruct::s_count); | ||
s_ptr1 = s_ptr2; | ||
TEST_ASSERT_EQUAL(1, TestStruct::s_count); | ||
} | ||
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TEST_ASSERT_EQUAL(1, TestStruct::s_count); | ||
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s_ptr1 = NULL; | ||
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// Destroy shared pointer | ||
TEST_ASSERT_EQUAL(0, TestStruct::s_count); | ||
} | ||
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/** | ||
* Test whether comparison operators operate as expected, both between | ||
* shared pointers managing the same object, | ||
* and a shared pointer and underlying raw pointer | ||
*/ | ||
void test_equality_comparators() | ||
{ | ||
TestStruct *raw_ptr1 = new TestStruct; | ||
TestStruct *raw_ptr2 = new TestStruct; | ||
SharedPtr<TestStruct> s_ptr1_1(raw_ptr1); | ||
SharedPtr<TestStruct> s_ptr1_2 = s_ptr1_1; | ||
SharedPtr<TestStruct> s_ptr2(raw_ptr2); | ||
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// Pointers that should be deemed equal | ||
TEST_ASSERT_TRUE(s_ptr1_1 == raw_ptr1); // Shared pointer / Raw pointer | ||
TEST_ASSERT_TRUE(s_ptr1_1 == s_ptr1_2); // Shared pointer / Shared pointer | ||
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// Pointers that should be deemed different | ||
TEST_ASSERT_TRUE(s_ptr1_1 != raw_ptr2); // Shared pointer / Raw pointer | ||
TEST_ASSERT_TRUE(s_ptr1_1 != s_ptr2); // Shared pointer / Shared pointer | ||
} | ||
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utest::v1::status_t test_setup(const size_t number_of_cases) | ||
{ | ||
GREENTEA_SETUP(10, "default_auto"); | ||
return utest::v1::verbose_test_setup_handler(number_of_cases); | ||
} | ||
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Case cases[] = { | ||
Case("Test single shared pointer instance", test_single_sharedptr_lifetime), | ||
Case("Test instance sharing across multiple shared pointers", test_instance_sharing), | ||
Case("Test equality comparators", test_equality_comparators) | ||
}; | ||
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utest::v1::Specification specification(test_setup, cases); | ||
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int main() | ||
{ | ||
return !utest::v1::Harness::run(specification); | ||
} |
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