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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="boost_asio.reference.write.overload6"></a><a class="link" href="overload6.html" title="write (6 of 6 overloads)">write (6 of 6 |
| overloads)</a> |
| </h4></div></div></div> |
| <p> |
| Write a certain amount of data to a stream before returning. |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> |
| <span class="keyword">typename</span> <a class="link" href="../SyncWriteStream.html" title="Buffer-oriented synchronous write stream requirements">SyncWriteStream</a><span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">CompletionCondition</span><span class="special">></span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">write</span><span class="special">(</span> |
| <span class="identifier">SyncWriteStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span> |
| <span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span> |
| <span class="identifier">CompletionCondition</span> <span class="identifier">completion_condition</span><span class="special">,</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">);</span> |
| </pre> |
| <p> |
| This function is used to write a certain number of bytes of data to a stream. |
| The call will block until one of the following conditions is true: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| All of the data in the supplied <a class="link" href="../basic_streambuf.html" title="basic_streambuf"><code class="computeroutput"><span class="identifier">basic_streambuf</span></code></a> has been written. |
| </li> |
| <li class="listitem"> |
| The completion_condition function object returns 0. |
| </li> |
| </ul></div> |
| <p> |
| This operation is implemented in terms of zero or more calls to the stream's |
| write_some function. |
| </p> |
| <a name="boost_asio.reference.write.overload6.parameters"></a><h6> |
| <a name="id1399983"></a> |
| <a class="link" href="overload6.html#boost_asio.reference.write.overload6.parameters">Parameters</a> |
| </h6> |
| <div class="variablelist"> |
| <p class="title"><b></b></p> |
| <dl> |
| <dt><span class="term">s</span></dt> |
| <dd><p> |
| The stream to which the data is to be written. The type must support |
| the SyncWriteStream concept. |
| </p></dd> |
| <dt><span class="term">b</span></dt> |
| <dd><p> |
| The <a class="link" href="../basic_streambuf.html" title="basic_streambuf"><code class="computeroutput"><span class="identifier">basic_streambuf</span></code></a> object from |
| which data will be written. |
| </p></dd> |
| <dt><span class="term">completion_condition</span></dt> |
| <dd> |
| <p> |
| The function object to be called to determine whether the write operation |
| is complete. The signature of the function object must be: |
| </p> |
| <pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">completion_condition</span><span class="special">(</span> |
| <span class="comment">// Result of latest write_some operation. |
| </span> <span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&</span> <span class="identifier">error</span><span class="special">,</span> |
| |
| <span class="comment">// Number of bytes transferred so far. |
| </span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">bytes_transferred</span> |
| <span class="special">);</span> |
| </pre> |
| <p> |
| A return value of 0 indicates that the write operation is complete. |
| A non-zero return value indicates the maximum number of bytes to |
| be written on the next call to the stream's write_some function. |
| </p> |
| </dd> |
| <dt><span class="term">ec</span></dt> |
| <dd><p> |
| Set to indicate what error occurred, if any. |
| </p></dd> |
| </dl> |
| </div> |
| <a name="boost_asio.reference.write.overload6.return_value"></a><h6> |
| <a name="id1400201"></a> |
| <a class="link" href="overload6.html#boost_asio.reference.write.overload6.return_value">Return |
| Value</a> |
| </h6> |
| <p> |
| The number of bytes written. If an error occurs, returns the total number |
| of bytes successfully transferred prior to the error. |
| </p> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2003 - 2010 Christopher M. Kohlhoff<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 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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