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#define XERR
#include "mapbase.ih"
void MapBase::osync()
{
if (not d_mMapped)
return;
size_t nWritten = pptr() - d_cp ; // #bytes written into the buffer
//xerr("file size " << d_fileSize << ", offset: " << d_offset << \X========
//", nWritten: " << nWritten);
if (nWritten > 0) // some bytes were written
{
if (msync(d_cp, nWritten, MS_SYNC) != 0)
cerr << "msync " << d_fname << ": from " << d_offset <<
", nBytes = " << nWritten << " failed\n";
if (size_t size = d_offset + nWritten; d_fileSize < size)
{//xerr("enlarging file size from " << d_fileSize << " to " << size);
d_fileSize = size;
}
}
unmap();
}
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