open, ftruncate, mmap
open
system\core\init\property_service.c
android:
fd = open("/dev/__properties__", O_RDWR | O_CREAT, 0600);
mingw:
fd = open("c:\\__properties__", O_RDWR | O_CREAT, 0600);
if (fd < 0){
fd = creat("c:\\__properties__", O_RDWR | O_CREAT);
if (fd < 0){
printf("ERROR opening.\n\terror is:%s\n", strerror(errno));
return -1;
}
chmod("c:\\__properties__", 0600);
}
ftruncate
mingw
c:\mingw-4.6.1\include\unistd.h
__CRT_INLINE int ftruncate(int __fd, off_t __length)
{
return _chsize (__fd, __length);
}
mmap
system\core\init\property_service.c
android:
data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
mingw:
nt-base.h:
#if !defined(mmap)
# define mmap(address,length,protection,access,file,offset) \
NTMapMemory(address,length,protection,access,file,offset)
#endif
nt-base.c:
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ N T M a p M e m o r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Mmap() emulates the Unix method of the same name.
%
% The format of the NTMapMemory method is:
%
% MagickExport void *NTMapMemory(char *address,size_t length,int protection,
% int access,int file,MagickOffsetType offset)
%
*/
//MagickExport void *NTMapMemory(char *address,size_t length,int protection,
void *NTMapMemory(char *address,size_t length,int protection,
int flags,int file,MagickOffsetType offset)
{
DWORD
access_mode,
high_length,
high_offset,
low_length,
low_offset,
protection_mode;
HANDLE
file_handle,
map_handle;
void
*map;
(void) address;
access_mode=0;
file_handle=INVALID_HANDLE_VALUE;
low_length=(DWORD) (length & 0xFFFFFFFFUL);
//The high-order DWORD of the maximum size of the file mapping object. normally it should be 0, unless
//the file size is extremely big.
//refer to MemoryMappedFile::map in https://raw.github.com/zimbatm/deb-mongodb/master/util/mmap_win.cpp
// high_length=(DWORD) ((((MagickOffsetType) length) >> 32) & 0xFFFFFFFFUL);
high_length=0;
map_handle=INVALID_HANDLE_VALUE;
map=(void *) NULL;
low_offset=(DWORD) (offset & 0xFFFFFFFFUL);
high_offset=(DWORD) ((offset >> 32) & 0xFFFFFFFFUL);
protection_mode=0;
if (protection & PROT_WRITE)
{
access_mode=FILE_MAP_WRITE;
if (!(flags & MAP_PRIVATE))
protection_mode=PAGE_READWRITE;
else
{
access_mode=FILE_MAP_COPY;
protection_mode=PAGE_WRITECOPY;
}
}
else
if (protection & PROT_READ)
{
access_mode=FILE_MAP_READ;
protection_mode=PAGE_READONLY;
}
if ((file == -1) && (flags & MAP_ANONYMOUS))
file_handle=INVALID_HANDLE_VALUE;
else
file_handle=(HANDLE) _get_osfhandle(file);
map_handle=CreateFileMapping(file_handle,0,protection_mode,high_length,
low_length,0);
if (map_handle)
{
map=(void *) MapViewOfFile(map_handle,access_mode,high_offset,low_offset,
length);
CloseHandle(map_handle);
}
if (map == (void *) NULL){
printf("ERROR CreateFileMapping.\n\terror is:%s\n", strerror(errno));
return((void *) MAP_FAILED);
}
return((void *) ((char *) map));
} //void *NTMapMemory(char *address,size_t length,int protection,
