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/* Support for SINGLEMAP_MEMORY and TRIVIALMAP_MEMORY model.
-------------------------- Specification -----------------------------
The operating system permits to add memory to arbitrary addresses, which
behaves like memory created through malloc().
The granularity of memory mapping, i.e. the length of a memory page.
This is a power of two, usually 4096. */
local /* uintL */ aint map_pagesize;
/* Initialize it.
local void init_map_pagesize (void);
Initialization:
initmap()
Returns 0 is successful, -1 on error.
Covers the range [map_addr,map_addr+map_len-1] with empty pages.
(map_addr and map_len must be multiples of map_pagesize.)
zeromap(map_addr,map_len)
Returns 0 is successful, -1/errno on error.
Reserves an address range for use with mmap_zeromap().
local int prepare_zeromap (uintP* map_addr, uintP* map_endaddr, bool shrinkp); */
#ifdef HAVE_MMAP
/* Fill a memory range [map_addr,map_addr+map_len-1] with pages mapped in from
file fd starting at position offset.
map_addr and map_len must be multiples of mmap_pagesize. */
local void* filemap (void* map_addr, uintM map_len, int fd, off_t offset)
;
#endif
/* -------------------------- Implementation ---------------------------- */
#define init_map_pagesize() { map_pagesize = mmap_pagesize; }
#define initmap() mmap_init()
#define zeromap mmap_zeromap
#define prepare_zeromap mmap_prepare
#ifdef HAVE_MMAP
#define filemap mmap_filemap
#endif
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