1
0
mirror of https://git.savannah.gnu.org/git/gnulib.git synced 2025-08-17 12:41:05 +03:00
Files
gnulib/doc/posix-functions/mmap.texi
2008-12-14 14:38:13 +01:00

30 lines
910 B
Plaintext

@node mmap
@section @code{mmap}
@findex mmap
POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/mmap.html}
Gnulib module: ---
Portability problems fixed by Gnulib:
@itemize
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
mingw, BeOS.
@item
To get anonymous memory, on some platforms, you can use the flags
@code{MAP_ANONYMOUS | MAP_PRIVATE} and @code{-1} instead of a file descriptor;
on others you have to use a read-only file descriptor of @file{/dev/zero}.
@item
On HP-UX, passing a non-NULL first argument, as a hint for the address (even
without @code{MAP_FIXED}, often causes @code{mmap} to fail. Better pass NULL
in this case.
@item
On HP-UX, @code{MAP_FIXED} basically never works. On other platforms, it depends
on the circumstances whether memory can be returned at a given address.
@end itemize