Re: [Boost-users] [interprocess] access dynamically accessed shared region in another process

Am Mittwoch, 1. April 2009 21:13:33 schrieb Ion Gaztañaga:

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// Check alignment assert((static_cast(ret->buf) - static_cast(0)) % Alignment == 0);

Obviously, offset_ptr is not a pointer so it can be static_cast'ed. offset_ptr is a smart pointer that emulates a pointer that can be placed in shared memory. See offset_ptr docs and implementation for more details. Try

// Check alignment assert((static_cast(ret->buf.get()) - static_cast(0)) % Alignment == 0);

Indeed. That was what I tried first. But that doesn't work either: The compiler says "invalid use of »void«" However, this does: assert((static_cast(ret->buf.get()) - static_cast(0)) % Alignment == 0); The pointer arithmetics need char*. So everything is fine. Thanks a bunch for your help with that great library! Cheers, Stephan