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// Copyright (C) 2015-2025 Jonathan Müller and foonathan/memory contributors
// SPDX-License-Identifier: Zlib
// tests all possible default allocator classes
#include "default_allocator.hpp"
#include <doctest/doctest.h>
#include <vector>
#include "detail/align.hpp"
#include "memory_arena.hpp"
using namespace foonathan::memory;
// *very* simple test case to ensure proper alignment and might catch some segfaults
template <class Allocator>
void check_default_allocator(Allocator& alloc, std::size_t def_alignment = alignof(void*))
{
auto ptr = alloc.allocate_node(1, 1);
REQUIRE(detail::is_aligned(ptr, def_alignment));
alloc.deallocate_node(ptr, 1, 1);
for (std::size_t i = 0u; i != 10u; ++i)
{
auto node = alloc.allocate_node(i, 1);
REQUIRE(detail::is_aligned(node, def_alignment));
alloc.deallocate_node(node, i, 1);
}
std::vector<void*> nodes;
for (std::size_t i = 0u; i != 10u; ++i)
{
auto node = alloc.allocate_node(i, 1);
REQUIRE(detail::is_aligned(node, def_alignment));
nodes.push_back(node);
}
for (std::size_t i = 0u; i != 10u; ++i)
alloc.deallocate_node(nodes[i], i, 1);
}
TEST_CASE("heap_allocator")
{
heap_allocator alloc;
check_default_allocator(alloc);
}
TEST_CASE("new_allocator")
{
new_allocator alloc;
check_default_allocator(alloc);
}
TEST_CASE("malloc_allocator")
{
malloc_allocator alloc;
check_default_allocator(alloc);
}
TEST_CASE("static_allocator")
{
static_allocator_storage<1024> storage;
static_allocator alloc(storage);
// no need to test alignment issues here again, implemented by fixed_memory_stack
check_default_allocator(alloc, 1);
}
TEST_CASE("virtual_memory_allocator")
{
virtual_memory_allocator alloc;
check_default_allocator(alloc, get_virtual_memory_page_size());
}
TEST_CASE("virtual_block_allocator")
{
auto const page_size = get_virtual_memory_page_size();
constexpr std::size_t no_blocks{8u};
virtual_block_allocator alloc{page_size, no_blocks};
auto block = alloc.allocate_block();
REQUIRE(block.memory != nullptr);
REQUIRE(block.size == page_size);
alloc.deallocate_block(block);
}