DOS ain't dead - HX and memory mapped writable files.

myrkraverk

23.11.2010, 01:04

HX and memory mapped writable files. (DOSX)

Hi all,

I just tested memory mapping to write a file with HX and the file is either not created or not written to (I don't recall) when the map is not explicitly closed by the application. Is that a bug in HX?

More explicitly, using CreateFile(), CreateFileMapping() and MapViewOfFile() for writing, the file isn't written without
UnmapViewOfFile( map ); CloseHandle( mapping ); CloseHandle( f );

I just added all three since and so I do not know if only one or all three are needed.

Wine creates the file without this explicit closing. I did not test on NT itself.

Johann

Japheth

Germany (South),
23.11.2010, 09:04

@ myrkraverk

HX and memory mapped writable files.

Post reply

> I just added all three since and so I do not know if only one or all three
> are needed.

I did look into the source and AFAICS it isn't necessary to close the file handle - this is done automatically when the mapping object is closed.

> Wine creates the file without this explicit closing. I did not test on NT
> itself.

I will test if the file is created without unmapping/closing the mapping object.

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MS-DOS forever!