second call to mmap() results in error

[Christopher Faylor]

On Thu, Jan 30, 2014 at 06:36:34PM +0000, Lavrentiev, Anton (NIH/NLM/NCBI) [C] wrote:
>> Maybe you missed Corinna's reply?
>> 
>> <http://cygwin.com/ml/cygwin/2014-01/msg00519.html>
>
>No, I did not.  She was going after ftruncate() there.
>
>Yet, the problem seems to be in cygwin's <sys/mman.h>, which does this:
>
>#ifndef __INSIDE_CYGWIN__
>extern void *mmap (void *__addr, size_t __len, int __prot, int __flags, int __fd, off_t __off);
>#endif
>
>which means that user code can't use the prototype.  Why is it conditional?

#if*n*def __INSIDE_CYGWIN__

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