On Feb 25 16:18, Corinna Vinschen wrote:
> On Feb 25 06:35, Eric Blake wrote:
> > While you are at it, POSIX requires an update to underlying file's ctime
> > sometime between mmap(... MAP_SHARED, PROT_WRITE ...) and the
> > corresponding munmap() or msync() if the mapped region was written to. If
Tried cygwin1-20050225.dll. Things seem to work fine now.
Thanks, Corinna!
Evgeny
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On Feb 25 06:35, Eric Blake wrote:
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> According to Corinna Vinschen on 2/25/2005 5:00 AM:
> > The reason that MAP_FAILED only works on 64K boundaries so far is,
> > that I didn't handle this case. Usually there are not many good
> > reasons to us
Corinna Vinschen wrote:
You shouldn't just use some arbitrary address and
use MAP_FIXED with it, otherwise you're making invaild assumptions
about the memory layout of your machine/os/application.
I know. It was just a test code to demo this 64K strangeness. In
reality, I use addresses which have
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According to Corinna Vinschen on 2/25/2005 5:00 AM:
> The reason that MAP_FAILED only works on 64K boundaries so far is,
> that I didn't handle this case. Usually there are not many good
> reasons to use MAP_FIXED. However, I've checked in a patch wh
On Feb 25 01:17, Evgeny Stambulchik wrote:
> Hello,
>
> There is something strange about mmap(addr, ..., MAP_FIXED) under
> Cygwin. For a reason, it always fails if addr is not on a 16xPAGE_SIZE
> boundary. Here is a short demo:
>
> #include
> #include
> #include
> #include
> #include
> #i
Sean Daley wrote:
Read the description to lpBaseAddress again and then read the
following comment from
cygwin's mmap code:
/* If a non-zero address is given, try mapping using the given address first.
If it fails and flags is not MAP_FIXED, try again with NULL address. */
I did. Now may I ask yo
Evgeny Stambulchik wrote:
> Christopher Faylor wrote:
>
> > See:
> > http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/mapviewoffileex.asp
> >
> > Pay particular attention to the description of lpBaseAddress.
>
> Thanks! It doesn't explain, though, how mmap manages to
Christopher Faylor wrote:
See:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/mapviewoffileex.asp
Pay particular attention to the description of lpBaseAddress.
Thanks! It doesn't explain, though, how mmap manages to avoid this 64k
restriction when MAP_FIXED is NOT set
On Fri, Feb 25, 2005 at 01:17:52AM +0200, Evgeny Stambulchik wrote:
>There is something strange about mmap(addr, ..., MAP_FIXED) under
>Cygwin. For a reason, it always fails if addr is not on a 16xPAGE_SIZE
>boundary. Here is a short demo:
See:
http://msdn.microsoft.com/library/default.asp?url=/
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