150 lines
4 KiB
C++
150 lines
4 KiB
C++
/**
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* MIT License
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*
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* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#define BOOST_TEST_DYN_LINK
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#include <boost/test/unit_test.hpp>
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#include <cstddef>
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#include <cstdlib>
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#include <functional>
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#include <limits>
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#include <stdexcept>
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#include <type_traits>
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#include <utility>
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#include <tsl/robin_map.h>
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#include "utils.h"
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static std::size_t nb_custom_allocs = 0;
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template<typename T>
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class custom_allocator {
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public:
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using value_type = T;
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using pointer = T*;
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using const_pointer = const T*;
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using reference = T&;
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using const_reference = const T&;
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using size_type = std::size_t;
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using difference_type = std::ptrdiff_t;
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using propagate_on_container_move_assignment = std::true_type;
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template<typename U>
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struct rebind {
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using other = custom_allocator<U>;
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};
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custom_allocator() = default;
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custom_allocator(const custom_allocator&) = default;
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template<typename U>
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custom_allocator(const custom_allocator<U>&) {
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}
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pointer address(reference x) const noexcept {
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return &x;
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}
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const_pointer address(const_reference x) const noexcept {
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return &x;
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}
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pointer allocate(size_type n, const void* /*hint*/ = 0) {
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nb_custom_allocs++;
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pointer ptr = static_cast<pointer>(std::malloc(n * sizeof(T)));
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if(ptr == nullptr) {
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#ifdef TSL_RH_NO_EXCEPTIONS
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std::abort();
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#else
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throw std::bad_alloc();
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#endif
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}
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return ptr;
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}
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void deallocate(T* p, size_type /*n*/) {
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std::free(p);
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}
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size_type max_size() const noexcept {
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return std::numeric_limits<size_type>::max()/sizeof(value_type);
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}
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template<typename U, typename... Args>
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void construct(U* p, Args&&... args) {
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::new(static_cast<void *>(p)) U(std::forward<Args>(args)...);
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}
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template<typename U>
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void destroy(U* p) {
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p->~U();
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}
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};
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template <class T, class U>
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bool operator==(const custom_allocator<T>&, const custom_allocator<U>&) {
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return true;
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}
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template <class T, class U>
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bool operator!=(const custom_allocator<T>&, const custom_allocator<U>&) {
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return false;
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}
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//TODO Avoid overloading new to check number of global new
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// static std::size_t nb_global_new = 0;
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// void* operator new(std::size_t sz) {
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// nb_global_new++;
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// return std::malloc(sz);
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// }
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//
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// void operator delete(void* ptr) noexcept {
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// std::free(ptr);
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// }
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BOOST_AUTO_TEST_SUITE(test_custom_allocator)
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BOOST_AUTO_TEST_CASE(test_custom_allocator_1) {
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// nb_global_new = 0;
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nb_custom_allocs = 0;
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tsl::robin_map<int, int, std::hash<int>, std::equal_to<int>,
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custom_allocator<std::pair<int, int>>> map;
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const int nb_elements = 1000;
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for(int i = 0; i < nb_elements; i++) {
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map.insert({i, i*2});
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}
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BOOST_CHECK_NE(nb_custom_allocs, 0);
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// BOOST_CHECK_EQUAL(nb_global_new, 0);
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}
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BOOST_AUTO_TEST_SUITE_END()
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