diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/pugixml.cpp | 109 |
1 files changed, 67 insertions, 42 deletions
diff --git a/src/pugixml.cpp b/src/pugixml.cpp index 40e8ab8..eab6e6c 100644 --- a/src/pugixml.cpp +++ b/src/pugixml.cpp @@ -538,35 +538,6 @@ PUGI__NS_BEGIN return buf; } - void* allocate_object(size_t size, xml_memory_page*& out_page) - { - #ifdef PUGIXML_COMPACT - void* result = allocate_memory(size + sizeof(uint32_t), out_page); - if (!result) return 0; - - // adjust for marker - if (PUGI__UNLIKELY(static_cast<uintptr_t>(static_cast<char*>(result) - out_page->compact_page_marker) >= 256 * xml_memory_block_alignment)) - { - // insert new marker - uint32_t* marker = static_cast<uint32_t*>(result); - - *marker = reinterpret_cast<char*>(marker) - reinterpret_cast<char*>(out_page); - out_page->compact_page_marker = reinterpret_cast<char*>(marker); - - return marker + 1; - } - else - { - // roll back uint32_t part - _busy_size -= sizeof(uint32_t); - - return result; - } - #else - return allocate_memory(size, out_page); - #endif - } - void deallocate_memory(void* ptr, size_t size, xml_memory_page* page) { if (page == _root) page->busy_size = _busy_size; @@ -703,10 +674,9 @@ PUGI__NS_BEGIN _root->prev->next = page; _root->prev = page; - } - // allocate inside page - page->busy_size = size; + page->busy_size = size; + } return reinterpret_cast<char*>(page) + sizeof(xml_memory_page); } @@ -754,6 +724,11 @@ PUGI__NS_BEGIN return const_cast<xml_memory_page*>(reinterpret_cast<const xml_memory_page*>(page_marker - *reinterpret_cast<const uint32_t*>(page_marker))); } + bool has_marker() const + { + return _page == sizeof(uint32_t) >> compact_alignment_log2; + } + private: unsigned char _page; unsigned char _flags; @@ -1125,10 +1100,57 @@ PUGI__NS_END // Low-level DOM operations PUGI__NS_BEGIN +#ifdef PUGIXML_COMPACT + inline void* allocate_object(xml_allocator& alloc, size_t size, xml_memory_page*& out_page) + { + void* result = alloc.allocate_memory(size + sizeof(uint32_t), out_page); + if (!result) return 0; + + // adjust for marker + if (PUGI__UNLIKELY(static_cast<uintptr_t>(static_cast<char*>(result) - out_page->compact_page_marker) >= 256 * compact_alignment)) + { + // insert new marker + uint32_t* marker = static_cast<uint32_t*>(result); + + *marker = reinterpret_cast<char*>(marker) - reinterpret_cast<char*>(out_page); + out_page->compact_page_marker = reinterpret_cast<char*>(marker); + + return marker + 1; + } + else + { + // roll back uint32_t part + alloc._busy_size -= sizeof(uint32_t); + + return result; + } + } + + template <typename T> + inline void deallocate_object(xml_allocator& alloc, T* ptr, size_t size, xml_memory_page* page) + { + // this is very crude... we should be able to do better? + if (ptr->header.has_marker()) + page->compact_page_marker = 0; + + alloc.deallocate_memory(ptr, size + ptr->header.has_marker() * sizeof(uint32_t), page); + } +#else + inline void* allocate_object(xml_allocator& alloc, size_t size, xml_memory_page*& out_page) + { + return alloc.allocate_memory(size, out_page); + } + + inline void deallocate_object(xml_allocator& alloc, void* ptr, size_t size, xml_memory_page* page) + { + alloc.deallocate_memory(ptr, size, page); + } +#endif + inline xml_attribute_struct* allocate_attribute(xml_allocator& alloc) { xml_memory_page* page; - void* memory = alloc.allocate_object(sizeof(xml_attribute_struct), page); + void* memory = allocate_object(alloc, sizeof(xml_attribute_struct), page); return new (memory) xml_attribute_struct(page); } @@ -1136,7 +1158,7 @@ PUGI__NS_BEGIN inline xml_node_struct* allocate_node(xml_allocator& alloc, xml_node_type type) { xml_memory_page* page; - void* memory = alloc.allocate_object(sizeof(xml_node_struct), page); + void* memory = allocate_object(alloc, sizeof(xml_node_struct), page); return new (memory) xml_node_struct(page, type); } @@ -1149,7 +1171,7 @@ PUGI__NS_BEGIN if (a->header & impl::xml_memory_page_value_allocated_mask) alloc.deallocate_string(a->value); - alloc.deallocate_memory(a, sizeof(xml_attribute_struct), PUGI__GETPAGE(a)); + deallocate_object(alloc, a, sizeof(xml_attribute_struct), PUGI__GETPAGE(a)); } inline void destroy_node(xml_node_struct* n, xml_allocator& alloc) @@ -1178,7 +1200,7 @@ PUGI__NS_BEGIN child = next; } - alloc.deallocate_memory(n, sizeof(xml_node_struct), PUGI__GETPAGE(n)); + deallocate_object(alloc, n, sizeof(xml_node_struct), PUGI__GETPAGE(n)); } inline void append_node(xml_node_struct* child, xml_node_struct* node) @@ -6668,8 +6690,14 @@ namespace pugi { assert(!_root); + #ifdef PUGIXML_COMPACT + const size_t page_offset = sizeof(uint32_t); + #else + const size_t page_offset = 0; + #endif + // initialize sentinel page - PUGI__STATIC_ASSERT(sizeof(impl::xml_memory_page) + sizeof(impl::xml_document_struct) + impl::xml_memory_page_alignment - sizeof(void*) <= sizeof(_memory)); + PUGI__STATIC_ASSERT(sizeof(impl::xml_memory_page) + sizeof(impl::xml_document_struct) + impl::xml_memory_page_alignment - sizeof(void*) + page_offset <= sizeof(_memory)); // align upwards to page boundary void* page_memory = reinterpret_cast<void*>((reinterpret_cast<uintptr_t>(_memory) + (impl::xml_memory_page_alignment - 1)) & ~(impl::xml_memory_page_alignment - 1)); @@ -6680,16 +6708,13 @@ namespace pugi page->busy_size = impl::xml_memory_page_size; - // allocate new root + // setup first page marker #ifdef PUGIXML_COMPACT - const size_t page_offset = sizeof(uint32_t); - page->compact_page_marker = reinterpret_cast<char*>(page) + sizeof(impl::xml_memory_page); *reinterpret_cast<uint32_t*>(page->compact_page_marker) = sizeof(impl::xml_memory_page); - #else - const size_t page_offset = 0; #endif + // allocate new root _root = new (reinterpret_cast<char*>(page) + sizeof(impl::xml_memory_page) + page_offset) impl::xml_document_struct(page); _root->prev_sibling_c = _root; |