Messages in this thread |  | | Subject | Re: anonymous shared mmap. Where? (fwd) | From | Matti E Aarnio <> | Date | Fri, 26 Jul 1996 21:20:58 +0300 (EET DST) |
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> > On Wed, 24 Jul 1996, A.N.Kuznetsov wrote: > > > > > > Unpleasant discovery, 2.0 has no shared anonymous mmap ??? > > > It's definitely 2.1, if even that. Shared anonymous mmap is a monstrosity > > (even the name is a oxymoron), and it's hard to implement to boot. > > Can someone tell me what shared anonymous mmap is. Is it a way to > create shared memory regions between a process and its children, or is > it a way to create shared memory regions between unrelated processses?
Between process and its children.
However I used recently alternate strategy, when I needed a shared page or two:
fp = mktemp(); fwrite(fp,....); <-- about pagefull lseek(fileno(fp),0,0); <-- MUST do, linux oddity is that file io pointer affects the mmap() of said file.. p = mmap( ... ) fclose(fp);
fork(); and be happy.
> Thanks, > > Jim
/Matti Aarnio <mea@utu.fi>
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