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Re: PATCH: Make Makefile.am work in parallel
--On Tuesday, May 07, 2002 03:27:46 PM -0300 Alexandre Oliva
<aoliva@redhat.com> wrote:
> On May 7, 2002, Mark Mitchell <mark@codesourcery.com> wrote:
>
>> I've changed write_classfile to create "foo.class.tmp" and then call
>> "rename" to change it to "foo.class" after the file has been written.
>> Note that "rename" is guaranteed to be atomic.
>
> I don't think rename is really guaranteed to be atomic. IIRC, on some
> OSs/file-systems, it is implemented as link&remove, but even this
> would be good enough for us. As long as it's not copy&remove, which
> `mv' would do to move between different filesystems, when rename
> failed, we're safe.
We're wandering into irrelevancy, but just to be clear, I meant "atomic"
to refer to the creation of the new file, not elimination of the old one.
In other words, there's no point where the new file "partially" exists;
it's either there or it ain't. I think you're saying this too, so that's
good.
Patch coming soon.
--
Mark Mitchell mark@codesourcery.com
CodeSourcery, LLC http://www.codesourcery.com