🚀 go-pugleaf

"Ramy" <Ramy@NoMail.com> wrote in message
news:40c58d7a$1@newsgroups.borland.com...

> I need to write 2 applications which runs at the same time
> on the computer (Windows-2000) and share same piece
> of memory for exchanging data between each other

Use a named file mapping to share a block of memory between the two
programs.  Look at CreateFileMapping() and MapViewOfFile().  When both
applications call CreateFileMapping() using the same name, they will get a
handle to the same global mapping object.  Then MapViewOfFile() can turn
that object into a pointer that both applications can then use to access the
shared memory.

> if for example one application change this matrix, the anther
> application can take the matrix from the memory and use it,
> or display it for example...

Just make sure that you provide adequate synchronization, such as via a
named mutex.

> Can i allocate an array like this -
>
> float array[500][400];
>
> then write it's address ( &array[0][0] ) and size
> (500x400) in a file, so the other application can read the
> file and access the array by using the pointer and the size
> from this file?

No.  Applications have their own address spaces.  They cannot access each
other's memory directly.  The value of a pointer in one application may not
be a meaningful value in another program.


Gambit