[Boost-users] [iostreams] how to flush mapped_file

Subject: [Boost-users] [iostreams] how to flush mapped_file
From: Stefan Strasser (strasser_at_[hidden])
Date: 2009-08-27 00:33:54

Hi,

I'm new to the iostreams library, how do you flush/sync a 
iostreams::mapped_file?

iostreams::flush(mapped_file) doesn't seem to work, although it works with a 
normal file device. are mapped_file's not flushable?

the documentation of concept Flushable strangly says that it is an 
implementation detail, if a device is flushable.

it should result in a call to msync() on posix systems and must not be an 
implementation detail, but the flush must be guaranteed. is this not possible 
with iostreams?

thank you