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Reduce required page alignment to 32

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Since we no longer have a name/value pair in nodes we need one less bit to
represent allocated flags. This reduces the page overhead by 32 bytes.
This commit is contained in:
Arseny Kapoulkine 2014-11-08 20:05:12 +01:00
parent c74dc33604
commit cca23e6363
1 changed files with 11 additions and 5 deletions
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16
src/pugixml.cpp
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@ -407,13 +407,19 @@ PUGI__NS_BEGIN
#endif #endif
; ;
static const uintptr_t xml_memory_page_alignment = 64; static const uintptr_t xml_memory_page_alignment = 32;
static const uintptr_t xml_memory_page_pointer_mask = ~(xml_memory_page_alignment - 1); static const uintptr_t xml_memory_page_pointer_mask = ~(xml_memory_page_alignment - 1);
static const uintptr_t xml_memory_page_contents_shared_mask = 32;
static const uintptr_t xml_memory_page_contents_allocated_mask = 16; // extra metadata bits for xml_node_struct
static const uintptr_t xml_memory_page_name_allocated_mask = 16; static const uintptr_t xml_memory_page_contents_shared_mask = 16;
static const uintptr_t xml_memory_page_value_allocated_mask = 8; static const uintptr_t xml_memory_page_contents_allocated_mask = 8;
static const uintptr_t xml_memory_page_type_mask = 7; static const uintptr_t xml_memory_page_type_mask = 7;
// extra metadata bits for xml_attribute_struct
static const uintptr_t xml_memory_page_name_allocated_mask = 2;
static const uintptr_t xml_memory_page_value_allocated_mask = 1;
// combined masks for string uniqueness
static const uintptr_t xml_memory_page_name_allocated_or_shared_mask = xml_memory_page_name_allocated_mask | xml_memory_page_contents_shared_mask; static const uintptr_t xml_memory_page_name_allocated_or_shared_mask = xml_memory_page_name_allocated_mask | xml_memory_page_contents_shared_mask;
static const uintptr_t xml_memory_page_value_allocated_or_shared_mask = xml_memory_page_value_allocated_mask | xml_memory_page_contents_shared_mask; static const uintptr_t xml_memory_page_value_allocated_or_shared_mask = xml_memory_page_value_allocated_mask | xml_memory_page_contents_shared_mask;
static const uintptr_t xml_memory_page_contents_allocated_or_shared_mask = xml_memory_page_contents_allocated_mask | xml_memory_page_contents_shared_mask; static const uintptr_t xml_memory_page_contents_allocated_or_shared_mask = xml_memory_page_contents_allocated_mask | xml_memory_page_contents_shared_mask;