Could someone point me to a link for a sample program of using iostreams::mapped_file(except the default tutorial)...I gave a shot at it and snippet is as follows...<br><br>&nbsp;&nbsp;&nbsp; io::mapped_file_params aparams(&quot;c:\\mf.txt&quot;);
<br>&nbsp;&nbsp;&nbsp; aparams.new_file_size = 1e8;<br>&nbsp;&nbsp;&nbsp; aparams.mode = BOOST_IOS::out;<br>&nbsp;&nbsp;&nbsp; io::stream_buffer&lt;io::mapped_file&gt; mfStrmBuf(aparams);<br>&nbsp;&nbsp;&nbsp; ostream out(&amp;mfStrmBuf);<br>&nbsp;&nbsp; out &lt;&lt; .... keep on writing to file...
<br><br>it works but I need to know how one create a mapped_file that has to grow beyond new_file_size!! That means I dont know the size of the file to be created at compile time!!<br><br>How to flush explicitly? <br><br>
I am in the process of understanding as to which one offers better performance with respect to time taken when some thousands of lines have to be written to a file.....ofstream vs mapped_file?<br><br>Thanks in advance :)<br>