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Home > Archive > Unix Programming > July 2004 > mmap with fork
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| Tejas Arun Kokje 2004-07-28, 6:19 pm |
| Hello
Can some body provide a sample code which uses mmap I/O to pass messages
from from child process to parent
thanks
Tejas Kokje
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| Barry Margolin 2004-07-28, 6:19 pm |
| In article <pan.2004.07.27.20.24.49.31497@usc.edu>,
Tejas Arun Kokje <kokje@usc.edu> wrote:
> Hello
>
> Can some body provide a sample code which uses mmap I/O to pass messages
> from from child process to parent
You do it the same way as you would if they weren't related at all. If
two processes mmap() the same file, what one process writes to the
memory region will be seen by the other.
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
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| Frank Cusack 2004-07-28, 6:19 pm |
| On Wed, 28 Jul 2004 01:12:33 -0400 Barry Margolin <barmar@alum.mit.edu> wrote:
> In article <pan.2004.07.27.20.24.49.31497@usc.edu>,
> Tejas Arun Kokje <kokje@usc.edu> wrote:
>
>
> You do it the same way as you would if they weren't related at all. If
> two processes mmap() the same file, what one process writes to the
> memory region will be seen by the other.
For MAP_SHARED.
/fc
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