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/* $Id$
* =============================================================================
*
* = LIBRARY
* pace
*
* = FILENAME
* pace/win32/mman.c
*
* = AUTHOR
* Luther Baker
*
* ============================================================================= */
#include "pace/sys/mman.h"
#if !defined (PACE_HAS_INLINE)
# include "pace/win32/mman.inl"
#endif /* ! PACE_HAS_INLINE */
#include <windows.h>
#include <stdio.h>
#if (PACE_HAS_POSIX_NONUOF_FUNCS)
void *
mmap (void * addr, size_t len, int prot, int flags,
PACE_HANDLE fildes, pace_off_t off)
{
void *addr_mapping = 0;
int nt_flags = 0;
PACE_HANDLE file_mapping = PACE_INVALID_HANDLE;
if (PACE_BIT_ENABLED (flags, MAP_PRIVATE))
{
prot = PAGE_WRITECOPY;
nt_flags = FILE_MAP_COPY;
}
else if (PACE_BIT_ENABLED (flags, MAP_SHARED))
{
if (PACE_BIT_ENABLED (prot, PAGE_READONLY))
nt_flags = FILE_MAP_READ;
if (PACE_BIT_ENABLED (prot, PAGE_READWRITE))
nt_flags = FILE_MAP_WRITE;
}
file_mapping = CreateFileMapping (fildes,
0,
prot,
0,
0,
0);
if (file_mapping == 0)
PACE_FAIL_RETURN (MAP_FAILED);
# if defined (PACE_OS_EXTRA_MMAP_FLAGS)
nt_flags |= PACE_OS_EXTRA_MMAP_FLAGS;
# endif /* PACE_OS_EXTRA_MMAP_FLAGS */
# if !defined (PACE_HAS_WINCE)
addr_mapping = MapViewOfFileEx (file_mapping,
nt_flags,
0,
off,
len,
addr);
# else
ACE_UNUSED_ARG (addr); /* WinCE does not allow specifying <addr>.*/
addr_mapping = MapViewOfFile (file_mapping,
nt_flags,
0,
off,
len);
# endif /* ! PACE_HAS_WINCE */
/* Only close this down if we used the temporary. */
if (file_mapping == PACE_INVALID_HANDLE)
CloseHandle (file_mapping);
if (addr_mapping == 0)
PACE_FAIL_RETURN (MAP_FAILED);
else if (PACE_BIT_ENABLED (flags, MAP_FIXED)
&& addr_mapping != addr)
{
errno = EINVAL;
return MAP_FAILED;
}
else
return addr_mapping;
}
#endif /* PACE_HAS_POSIX_NONUOF_FUNCS */
#if (PACE_HAS_POSIX_NONUOF_FUNCS)
int
mprotect (void * addr, size_t len, int prot)
{
DWORD dummy; /* Sigh! */
return VirtualProtect(addr, len, prot, &dummy) ? 0 : -1;
}
#endif /* PACE_HAS_POSIX_NONUOF_FUNCS */
#if (PACE_HAS_POSIX_NONUOF_FUNCS)
int
msync (void * addr, size_t len, int flags)
{
PACE_UNUSED_ARG (flags);
PACE_WIN32CALL_RETURN
(PACE_ADAPT_RETVAL
(FlushViewOfFile (addr, len), pace_result_), int, -1);
}
#endif /* PACE_HAS_POSIX_NONUOF_FUNCS */
#if (PACE_HAS_POSIX_NONUOF_FUNCS)
int
munmap (void * addr, size_t len)
{
PACE_UNUSED_ARG (len);
PACE_WIN32CALL_RETURN
(PACE_ADAPT_RETVAL
(UnmapViewOfFile (addr), pace_result_), int, -1);
}
#endif /* PACE_HAS_POSIX_NONUOF_FUNCS */
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