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96 lines
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<div class="titlepage"><div><div><h3 class="title">
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<a name="boost_asio.reference.buffer_cast"></a><a class="link" href="buffer_cast.html" title="buffer_cast">buffer_cast</a>
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</h3></div></div></div>
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<p>
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<a class="indexterm" name="boost_asio.indexterm.buffer_cast"></a>
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(Deprecated: Use the <code class="computeroutput">data()</code>
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member function.) The <code class="computeroutput">boost::asio::buffer_cast</code> function is used
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to obtain a pointer to the underlying memory region associated with a buffer.
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</p>
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<p>
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Cast a non-modifiable buffer to a specified pointer to POD type.
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</p>
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<pre class="programlisting">template<
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typename PointerToPodType>
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PointerToPodType <a class="link" href="buffer_cast/overload1.html" title="buffer_cast (1 of 2 overloads)">buffer_cast</a>(
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const mutable_buffer & b);
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<span class="emphasis"><em>» <a class="link" href="buffer_cast/overload1.html" title="buffer_cast (1 of 2 overloads)">more...</a></em></span>
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template<
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typename PointerToPodType>
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PointerToPodType <a class="link" href="buffer_cast/overload2.html" title="buffer_cast (2 of 2 overloads)">buffer_cast</a>(
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const const_buffer & b);
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<span class="emphasis"><em>» <a class="link" href="buffer_cast/overload2.html" title="buffer_cast (2 of 2 overloads)">more...</a></em></span>
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</pre>
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<h5>
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<a name="boost_asio.reference.buffer_cast.h0"></a>
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<span class="phrase"><a name="boost_asio.reference.buffer_cast.examples_"></a></span><a class="link" href="buffer_cast.html#boost_asio.reference.buffer_cast.examples_">Examples:</a>
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</h5>
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<p>
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To access the memory of a non-modifiable buffer, use:
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</p>
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<pre class="programlisting">boost::asio::const_buffer b1 = ...;
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const unsigned char* p1 = boost::asio::buffer_cast<const unsigned char*>(b1);
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</pre>
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<p>
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To access the memory of a modifiable buffer, use:
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</p>
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<pre class="programlisting">boost::asio::mutable_buffer b2 = ...;
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unsigned char* p2 = boost::asio::buffer_cast<unsigned char*>(b2);
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</pre>
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<p>
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The <code class="computeroutput">boost::asio::buffer_cast</code> function permits violations of
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type safety, so uses of it in application code should be carefully considered.
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</p>
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<h5>
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<a name="boost_asio.reference.buffer_cast.h1"></a>
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<span class="phrase"><a name="boost_asio.reference.buffer_cast.requirements"></a></span><a class="link" href="buffer_cast.html#boost_asio.reference.buffer_cast.requirements">Requirements</a>
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</h5>
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<p>
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<span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/buffer.hpp</code>
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</p>
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<p>
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<span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code>
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</p>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 Christopher
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M. Kohlhoff<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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