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Re: 1.7.0 CVS mmap failure
On Jan 10 22:44, Christopher Layne wrote:
> > On Jan 10 09:37, Brian Ford wrote:
> > > Yes, this fixes my STC and the application from which it was derived.
> > > Thanks.
>
> BTW: a couple of things:
>
> 1. Is there a possibility of another application or thread reserving that
> just alloc/free'd area right after using it to obtain (at that time) a
> valid address?
Yes, though unlikely. Standard allocations are basically bottom-up,
mmap allocations are top-down. As soon as malloc uses bigger chunks
(>128K), it uses mmap. mmap is running in a critical section and
supposed to be thread-safe.
> 2. What exactly is the difference between using CreateFileMapping and
> MapViewOfFile vs what we're doing now which seems to use NtMapViewOfSection?
Win32 vs. native NT call. The former doesn't support all flags and
memory protections the latter supports.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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