projects / ceph.git / blame
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| 7c673cae FG |
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| 6 | <title>exception_ptr</title> | |
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| 15 | <a href="http://www.boost.org"><img style="border:0" src="../../../boost.png" alt="Boost" width="277" height="86"/></a> | |
| 16 | </div> | |
| 17 | <h1>Boost Exception</h1> | |
| 18 | </div> | |
| 19 | <!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 20 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 21 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 22 | <div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>exception_ptr</h3> | |
| 23 | </div> | |
| 24 | <div class="RenoIncludeDIV"><p><span class="RenoEscape">#<!--<wiki>`#</wiki>--></span>include <<span class="RenoLink"><a href="boost_exception_ptr_hpp.html">boost/exception_ptr.hpp</a></span>></p> | |
| 25 | <pre>namespace | |
| 26 | boost | |
| 27 | { | |
| 28 | <span class="RenoIncludeSPAN"> typedef ---unspecified--- <span class="RenoLink">exception_ptr</span>;</span> | |
| 29 | }</pre> | |
| 30 | </div><p>The <span class="RenoLink">exception_ptr</span> type can be used to refer to a copy of an exception object. It is Default Constructible, Copy Constructible, Assignable and Equality Comparable; <span class="RenoLink">exception_ptr</span>'s operations do not throw.</p> | |
| 31 | <p>The referenced object remains valid at least as long as there is an <span class="RenoLink">exception_ptr</span> object that refers to it.</p> | |
| 32 | <p>Two instances of <span class="RenoLink">exception_ptr</span> are equivalent and compare equal if and only if they refer to the same exception.</p> | |
| 33 | <p>The default constructor of <span class="RenoLink">exception_ptr</span> produces the null value of the type. The null value is equivalent only to itself.</p> | |
| 34 | <h4>Thread safety:</h4> | |
| 35 | <p>The <span class="RenoLink">exception_ptr</span> type is "as thread-safe as built-in types":</p> | |
| 36 | <div><ul><li> An <span class="RenoLink">exception_ptr</span> instance can be "read" simultaneously by multiple threads</li> | |
| 37 | <li> Different <span class="RenoLink">exception_ptr</span> instances can be "written to" simultaneously by multiple threads, even when these instances refer to the same exception object</li> | |
| 38 | </ul></div> | |
| 39 | <p>All other simultaneous accesses result in undefined behavior.</p> | |
| 40 | <h4>Nesting of exceptions:</h4> | |
| 41 | <p>An <span class="RenoLink">exception_ptr</span> can be added as <span class="RenoLink"><a href="error_info.html">error_info</a></span> to any boost::<span class="RenoLink"><a href="exception.html">exception</a></span>. This is a convenient way to nest exceptions. There is no limit on the depth of the nesting, however cyclic references result in undefined behavior.</p> | |
| 42 | </div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div> | |
| 43 | See also: <span class="RenoPageList"><a href="boost-exception.html">Boost Exception</a> | <a href="boost_exception_errinfo_nested_exception_hpp.html">boost/exception/errinfo_nested_exception.hpp</a> | <a href="boost_exception_ptr_hpp.html">boost/exception_ptr.hpp</a> | <a href="copy_exception.html">copy_exception</a> | <a href="current_exception.html">current_exception</a> | <a href="diagnostic_information.html">diagnostic_information</a> | <a href="enable_current_exception.html">enable_current_exception</a> | <a href="original_exception_type.html">original_exception_type</a> | <a href="rethrow_exception.html">rethrow_exception</a> | <a href="throw_exception.html">throw_exception</a> | <a href="unknown_exception.html">unknown_exception</a></span> | |
| 44 | </div> | |
| 45 | <!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 46 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 47 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
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| 52 | <small>Copyright (c) 2006-2009 by Emil Dotchevski and Reverge Studios, Inc.<br/> | |
| 53 | Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</small> | |
| 54 | </p> | |
| 55 | </div> | |
| 56 | </div> | |
| 57 | </div> | |
| 58 | </div> | |
| 59 | </body> | |
| 60 | </html> |