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Moved #defines below definition of Page_s.

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Sears Russell 2006-06-13 22:40:24 +00:00
parent 0d09e9fb93
commit eab6385ca5
1 changed files with 15 additions and 11 deletions
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26
src/lladd/page.h
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@ -88,17 +88,6 @@ terms specified in this license.
BEGIN_C_DECLS
#define lsn_ptr(page) (((lsn_t*)(&((page)->memAddr[PAGE_SIZE])))-1)
#define page_type_ptr(page) (((int*)lsn_ptr((page)))-1)
#define end_of_usable_space_ptr(page) page_type_ptr((page))
#define shorts_from_end(page, count) (((short*)end_of_usable_space_ptr((page)))-(count))
#define bytes_from_start(page, count) (((byte*)((page)->memAddr))+(count))
#define ints_from_start(page, count) (((int*)((page)->memAddr))+(count))
#define ints_from_end(page, count) (((int*)end_of_usable_space_ptr((page)))-(count))
#define USABLE_SIZE_OF_PAGE (PAGE_SIZE - sizeof(lsn_t) - sizeof(int))
/**
The page type contains in-memory information about pages. This
information is used by LLADD to track the page while it is in
@ -181,6 +170,21 @@ struct Page_s {
};
#define lsn_ptr(page) (((lsn_t*)(&((page)->memAddr[PAGE_SIZE])))-1)
#define page_type_ptr(page) (((int*)lsn_ptr((page)))-1)
#define end_of_usable_space_ptr(page) page_type_ptr((page))
#define shorts_from_end(page, count) (((short*)end_of_usable_space_ptr((page)))-(count))
#define bytes_from_start(page, count) (((byte*)((page)->memAddr))+(count))
#define ints_from_start(page, count) (((int*)((page)->memAddr))+(count))
#define ints_from_end(page, count) (((int*)end_of_usable_space_ptr((page)))-(count))
#define decode_size(size) (((size) >= SLOT_TYPE_BASE) ? SLOT_TYPE_LENGTHS[(size)-SLOT_TYPE_BASE] : (size))
#define USABLE_SIZE_OF_PAGE (PAGE_SIZE - sizeof(lsn_t) - sizeof(int))
/**
* initializes all the global variables needed by the functions
* dealing with pages.