Re: Writable global section?

[Brian Gerst]

Richard B. Johnson wrote:
> I would like to be able to write to that variable and have it seen
> by other tasks, since shared memory is shared memory. It's a shame
> to mmap a shared library upon startup and then have to mmap some
> additional shared memory for some inter-process communication.

There are only two ways to share memory between processes:
- SYSV shared memory
- using clone() to share the VM.

Shared libraries != shared memory.  Each mapping of a shared library is 
copy-on-write.  The purpose of shared libraries is to save memory, not 
for IPC.

--
				Brian Gerst