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#ifndef LI_SYS_MMAP_H
#define LI_SYS_MMAP_H
#include "first.h"
#if defined(HAVE_SYS_MMAN_H)
#include <sys/mman.h>
#elif defined(_WIN32)
#include <Windows.h>
#include <HandleAPI.h>
#include <io.h>
#include <MemoryAPI.h>
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
#ifndef MAP_PRIVATE
#define MAP_PRIVATE 0
#endif
#ifndef MAP_SHARED
#define MAP_SHARED 0
#endif
#ifndef PROT_READ
#define PROT_READ PAGE_READONLY
#endif
#define HAVE_MMAP 1
#define munmap(addr, length) UnmapViewOfFile((LPCVOID)(addr))
static inline void *
mmap (void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
/* XXX: this limited implementation maps args only to read-only mmap */
if (prot != PAGE_READONLY) /*(for PAGE_READONLY and FILE_MAP_READ)*/
return MAP_FAILED;
UNUSED(flags);
HANDLE mh = CreateFileMapping((HANDLE) _get_osfhandle(fd),
NULL, PAGE_READONLY,
(sizeof(size_t) > 4) ? length >> 32 : 0,
length & 0xffffffff, NULL);
if (NULL == mh)
return MAP_FAILED;
LPVOID p = MapViewOfFileEx(mh, FILE_MAP_READ,
(sizeof(off_t) > 4) ? offset >> 32 : 0,
offset & 0xffffffff, length, addr);
CloseHandle(mh);
return (NULL != p) ? (void *)p : MAP_FAILED;
}
#else
# define MAP_SHARED 0
# define MAP_PRIVATE 0
# define PROT_READ 0
# define mmap(a, b, c, d, e, f) (-1)
# define munmap(a, b) (-1)
#endif /* HAVE_SYS_MMAN_H */
/* NetBSD 1.3.x needs it; also make it available if mmap() is not present */
#if !defined(MAP_FAILED)
# define MAP_FAILED ((char*)-1)
#endif
#endif
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