gceych@juliet.caltech.edu (Eychaner, Glenn C.) (12/13/90)
I'm not sure that this is the right place to post this, but...
I want to get the effect of FORTRAN group common blocks in C. In other words,
I want to be able to have 3 or 4 programs all sharing the same block of data,
some reading from it and some writing to it, without storing it all to a file
(file access is rather slow). In FORTRAN, I would create a common block and
INSTALL it using the VAX Installer. when I try to INSTALL a variable list
(linked shared) as a shareable image, it fails with: cannot create writable
section to read only file. Any ideas from anyone out there?
An example:
I want some programs to share some data...say the variables i,j,k.
So i create a program:
/* Common block */
int i,j,k;
compile it, and link it /SHARED. In each program I want to use it, I
declare the variables as extern and link the program with the block.
This allows the programs to share the variables.
Now, to get them to share the DATA, I INSTALL it. This fails as
described above.
Thanks in advance for any suggestions you might have.
Glenn Eychaner |Eychaner@SunCub.Caltech.edu|Remember: It is easier to ride a
40386 N Shore Ln |gceych@iago.caltech.edu |camel through the eye of a needle
Big Bear City, CA| |than to drive a Buick through the
92314|!*** G O N I N E R S ***!|hole in a doughnut.henry@zoo.toronto.edu (Henry Spencer) (12/13/90)
In article <1990Dec13.014044.9258@nntp-server.caltech.edu> gceych@juliet.caltech.edu writes: >I want to get the effect of FORTRAN group common blocks in C. In other words, >I want to be able to have 3 or 4 programs all sharing the same block of data, >some reading from it and some writing to it, without storing it all to a file >(file access is rather slow). In FORTRAN, I would create a common block and >INSTALL it using the VAX Installer... You would be better off asking this question in one of the VMS groups; I assume it's VMS Fortran you're talking about. The answer is very system-specific, because such a facility is not a standard part of C (or of Fortran, for that matter). -- "The average pointer, statistically, |Henry Spencer at U of Toronto Zoology points somewhere in X." -Hugh Redelmeier| henry@zoo.toronto.edu utzoo!henry