mirror of
https://github.com/JakeHillion/object-introspection.git
synced 2024-09-19 19:19:05 +01:00
128 lines
3.9 KiB
TOML
128 lines
3.9 KiB
TOML
[info]
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type_name = "std::deque"
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stub_template_params = [1]
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ctype = "LIST_TYPE"
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header = "deque"
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# Old:
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typeName = "std::deque<"
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ns = ["namespace std"]
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numTemplateParams = 1
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replaceTemplateParamIndex = []
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allocatorIndex = 1
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[codegen]
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decl = """
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template<typename T, typename Allocator>
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void getSizeType(const %1%<T, Allocator> &container, size_t& returnArg);
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"""
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func = """
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template<typename T, typename Allocator>
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void getSizeType(const %1%<T, Allocator> &container, size_t& returnArg)
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{
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SAVE_SIZE(sizeof(%1%<T>));
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SAVE_DATA((uintptr_t)&container);
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SAVE_DATA((uintptr_t)container.size());
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// The double ampersand is needed otherwise this loop doesn't work with vector<bool>
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for (auto&& it: container) {
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getSizeType(it, returnArg);
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}
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}
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"""
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traversal_func = """
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#ifdef __GLIBCXX__
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/* The std::deque container is a sequence of blocks, each of which is a contiguous
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* array of elements. The adresses of the blocks are stored within their own array
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* of pointers and is called the `map`.
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* So the formula to compute the exclusive size of a std::deque is:
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* `static size` + `total map size` + `total block size` - `total element size`
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* `static size` = sizeof(std::deque<T>)
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* `total map size` = `map capacity` * `pointer size`
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* `total block size` = `block count` * `block size`
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* `total element size` = `element count` * `element size`
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* Also see: https://godbolt.org/z/4znaz4hcd
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*
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* We don't have access to the map_capacity of the std::deque container, so we manually
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* re-create the layout of the container to access it.
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*
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* https://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a00686_source.html#l00509
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* From the source of <bits/stl_deque.h>, a std::deque has the following members:
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*/
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struct OI_Deque_impl_data {
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std::nullptr_t map;
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size_t map_capacity;
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typename container_type::const_iterator start;
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typename container_type::const_iterator finish;
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};
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const auto *rc = reinterpret_cast<const OI_Deque_impl_data*>(&container);
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const auto map_capacity = rc->map_capacity;
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const auto begin = container.begin();
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const auto end = container.end();
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const auto block_count = 1 + std::distance(begin._M_node, end._M_node);
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const auto block_size = (uintptr_t)begin._M_last - (uintptr_t)begin._M_first;
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constexpr auto static_size = sizeof(container_type);
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const auto total_map_size = map_capacity * sizeof(std::nullptr_t);
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const auto total_block_size = block_count * block_size;
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const auto total_element_size = container.size() * sizeof(typename container_type::value_type);
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const auto exclusive_size = static_size + total_map_size + total_block_size - total_element_size;
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const auto capacity = total_block_size / sizeof(typename container_type::value_type);
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#elif _LIBCPP_VERSION
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static_assert(false, "libc++ is currently not supported");
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#else
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static_assert(false, "Unsupported STL container. Seet types/deque_list_type.toml");
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#endif
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auto tail = returnArg
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.write((uintptr_t)&container)
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.write(exclusive_size)
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.write(capacity)
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.write(container.size());
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for (auto&& it: container) {
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tail = tail.delegate([&ctx, &it](auto ret) {
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return OIInternal::getSizeType<Ctx>(ctx, it, ret);
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});
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}
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return tail.finish();
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"""
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[[codegen.processor]]
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type = "types::st::VarInt<DB>"
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func = """
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el.pointer = std::get<ParsedData::VarInt>(d.val).value;
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"""
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[[codegen.processor]]
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type = "types::st::VarInt<DB>"
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func = """
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el.exclusive_size = std::get<ParsedData::VarInt>(d.val).value;
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"""
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[[codegen.processor]]
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type = "types::st::VarInt<DB>"
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func = """
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el.container_stats.emplace(result::Element::ContainerStats {
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.capacity = std::get<ParsedData::VarInt>(d.val).value,
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});
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"""
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[[codegen.processor]]
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type = "types::st::List<DB, typename TypeHandler<Ctx, T0>::type>"
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func = """
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static constexpr auto childField = make_field<Ctx, T0>("[]");
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auto list = std::get<ParsedData::List>(d.val);
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el.container_stats->length = list.length;
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stack_ins(inst::Repeat{ list.length, childField });
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"""
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