Shared "Integers"

[RoshanX]

How can you share integer values. With the functions given in C, it is only possible to allocate a flat memory space.

if you have a shared memory area that with the starting address at INTEGER,

Then this would give a runtime error

*INTEGER=1;
Is there a direct way of sharing an integer ?

[Magos]

Share how? Between functions? Between modules? Between programs?

[RoshanX]

Sorry..should have been more specific.......share amoung processes..............

[chrismiceli]

this is compiler specific, in linux there are many ways including mapped memory and shared memory. Might want to look at shmget() and mmap().

[RoshanX]

I finally got the program working with MMAP().
Question :
I am not that clear about the working os MMAP. Does the shared memeory reside in a file . ?

[chrismiceli]

from what I understand, it makes a file and makes it point to memory or something of that effect, then the other programs can read that memory.

[WaltP]

Originally posted by RoshanX
I finally got the program working with MMAP().
Question :
I am not that clear about the working os MMAP. Does the shared memeory reside in a file . ?

Did you try google on "mmap() function"?

One of many hits:
http://www.opengroup.org/onlinepubs/...ions/mmap.html