[Boost-users] Newbie error trying to construct an offset_ptr in a managed shared memory segment.

Subject: [Boost-users] Newbie error trying to construct an offset_ptr in a managed shared memory segment.
From: Bill Baker (bb_at_[hidden])
Date: 2019-04-03 14:38:12

This must be really dumb, because I can't even get the code to compile. I'm using VS2017 Pro and Boost 1.69.0.

The lines of code I'm having trouble with read:
> _dataBuffer = _sharedMemorySegment.construct<byte>(DataBufferName)[DataBufferSize](0);
> _dataBufferFree = _sharedMemorySegment.construct<size_t>(DataBufferFreeName)(DataBufferSize);
> _dataBufferInPointer = _sharedMemorySegment.construct<byte_offset_t >(DataBufferInName)(0);

I get the following error referencing the last line:
> Severity        Code        Description        Project        File        Line        Suppression State
> Error        C2664        'boost::interprocess::offset_ptr<byte,ptrdiff_t,uintptr_t,0>::offset_ptr(const boost::interprocess::offset_ptr<byte,ptrdiff_t,uintptr_t,0> &) noexcept': cannot convert argument 1 from 'T' to 'unsigned char *'        EncodingService        c:\program files\boost\boost_1_67_0\boost_1_69_0\boost\interprocess\detail\named_proxy.hpp        85

Any help would be greatly appreciated!




Sincerely,

Bill Baker
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