3b2b3556c1
* doc/xml/faq.xml: Update outdated allocator documentation. * doc/xml/manual/allocator.xml: Likewise. * doc/xml/manual/debug.xml: Likewise. * doc/xml/manual/evolution.xml: Likewise. * doc/xml/manual/using.xml: Likewise. From-SVN: r187068
635 lines
22 KiB
XML
635 lines
22 KiB
XML
<section xmlns="http://docbook.org/ns/docbook" version="5.0"
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xml:id="appendix.porting.api" xreflabel="api">
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<?dbhtml filename="api.html"?>
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<info><title>API Evolution and Deprecation History</title>
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<keywordset>
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<keyword>ISO C++</keyword>
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<keyword>api</keyword>
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<keyword>evolution</keyword>
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<keyword>deprecation</keyword>
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<keyword>history</keyword>
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</keywordset>
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</info>
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<para>
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A list of user-visible changes, in chronological order
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</para>
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<section xml:id="api.rel_300"><info><title><constant>3.0</constant></title></info>
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<para>
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Extensions moved to <filename class="directory">include/ext</filename>.
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</para>
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<para>
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Include files from the SGI/HP sources that pre-date the ISO standard
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are added. These files are placed into
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the <filename class="directory">include/backward</filename> directory and a deprecated warning
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is added that notifies on inclusion (<literal>-Wno-deprecated</literal>
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deactivates the warning.)
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</para>
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<para>Deprecated include <filename class="headerfile">backward/strstream</filename> added.</para>
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<para>Removal of include <filename class="headerfile">builtinbuf.h</filename>, <filename class="headerfile">indstream.h</filename>, <filename class="headerfile">parsestream.h</filename>, <filename class="headerfile">PlotFile.h</filename>, <filename class="headerfile">SFile.h</filename>, <filename class="headerfile">stdiostream.h</filename>, and <filename class="headerfile">stream.h</filename>.
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</para>
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</section>
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<section xml:id="api.rel_310"><info><title><constant>3.1</constant></title></info>
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<para>
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</para>
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<para>
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Extensions from SGI/HP moved from <code>namespace std</code>
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to <code>namespace __gnu_cxx</code>. As part of this, the following
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new includes are
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added: <filename class="headerfile">ext/algorithm</filename>, <filename class="headerfile">ext/functional</filename>, <filename class="headerfile">ext/iterator</filename>, <filename class="headerfile">ext/memory</filename>, and <filename class="headerfile">ext/numeric</filename>.
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</para>
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<para>
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Extensions to <code>basic_filebuf</code> introduced: <code>__gnu_cxx::enc_filebuf</code>, and <code>__gnu_cxx::stdio_filebuf</code>.
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</para>
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<para>
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Extensions to tree data structures added in <filename class="headerfile">ext/rb_tree</filename>.
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</para>
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<para>
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Removal of <filename class="headerfile">ext/tree</filename>, moved to <filename class="headerfile">backward/tree.h</filename>.
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</para>
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</section>
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<section xml:id="api.rel_320"><info><title><constant>3.2</constant></title></info>
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<para>
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</para>
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<para>Symbol versioning introduced for shared library.</para>
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<para>Removal of include <filename class="headerfile">backward/strstream.h</filename>.</para>
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<para>Allocator changes. Change <code>__malloc_alloc</code> to <code>malloc_allocator</code> and <code>__new_alloc</code> to <code>new_allocator</code>. </para>
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<para> For GCC releases from 2.95 through the 3.1 series, defining
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<literal>__USE_MALLOC</literal> on the gcc command line would change the
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default allocation strategy to instead use <code> malloc</code> and
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<function>free</function>. For the 3.2 and 3.3 release series the same
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functionality was spelled <literal>_GLIBCXX_FORCE_NEW</literal>. From
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GCC 3.4 onwards the functionality is enabled by setting
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<literal>GLIBCXX_FORCE_NEW</literal> in the environment, see
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<link linkend="manual.ext.allocator.mt">the mt allocator chapter</link>
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for details.
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</para>
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<para>Error handling in iostreams cleaned up, made consistent. </para>
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</section>
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<section xml:id="api.rel_330"><info><title><constant>3.3</constant></title></info>
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<para>
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</para>
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</section>
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<section xml:id="api.rel_340"><info><title><constant>3.4</constant></title></info>
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<para>
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</para>
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<para>
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Large file support.
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</para>
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<para> Extensions for generic characters and <code>char_traits</code> added in <filename class="headerfile">ext/pod_char_traits.h</filename>.
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</para>
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<para>
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Support for <code>wchar_t</code> specializations of <code>basic_filebuf</code> enhanced to support <code>UTF-8</code> and <code>Unicode</code>, depending on host. More hosts support basic <code>wchar_t</code> functionality.
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</para>
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<para>
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Support for <code>char_traits</code> beyond builtin types.
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</para>
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<para>
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Conformant <code>allocator</code> class and usage in containers. As
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part of this, the following extensions are
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added: <filename class="headerfile">ext/bitmap_allocator.h</filename>, <filename class="headerfile">ext/debug_allocator.h</filename>, <filename class="headerfile">ext/mt_allocator.h</filename>, <filename class="headerfile">ext/malloc_allocator.h</filename>,<filename class="headerfile">ext/new_allocator.h</filename>, <filename class="headerfile">ext/pool_allocator.h</filename>.
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</para>
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<para>
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This is a change from all previous versions, and may require
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source-level changes due to allocator-related changes to structures
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names and template parameters, filenames, and file locations. Some,
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like <code>__simple_alloc, __allocator, __alloc, </code> and <code>
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_Alloc_traits</code> have been removed.
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</para>
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<para>Default behavior of <code>std::allocator</code> has changed.</para>
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<para>
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Previous versions prior to 3.4 cache allocations in a memory
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pool, instead of passing through to call the global allocation
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operators (i.e., <classname>__gnu_cxx::pool_allocator</classname>). More
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recent versions default to the
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simpler <classname>__gnu_cxx::new_allocator</classname>.
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</para>
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<para> Previously, all allocators were written to the SGI
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style, and all STL containers expected this interface. This
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interface had a traits class called <code>_Alloc_traits</code> that
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attempted to provide more information for compile-time allocation
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selection and optimization. This traits class had another allocator
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wrapper, <code>__simple_alloc<T,A></code>, which was a
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wrapper around another allocator, A, which itself is an allocator
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for instances of T. But wait, there's more:
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<code>__allocator<T,A></code> is another adapter. Many of
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the provided allocator classes were SGI style: such classes can be
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changed to a conforming interface with this wrapper:
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<code>__allocator<T, __alloc></code> is thus the same as
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<code>allocator<T></code>.
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</para>
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<para> The class <classname>allocator</classname> used the typedef
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<type>__alloc</type> to select an underlying allocator that
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satisfied memory allocation requests. The selection of this
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underlying allocator was not user-configurable.
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</para>
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<table frame="all">
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<title>Extension Allocators</title>
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<tgroup cols="4" align="left" colsep="1" rowsep="1">
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<colspec colname="c1"/>
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<colspec colname="c2"/>
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<colspec colname="c3"/>
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<colspec colname="c4"/>
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<thead>
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<row>
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<entry>Allocator (3.4)</entry>
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<entry>Header (3.4)</entry>
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<entry>Allocator (3.[0-3])</entry>
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<entry>Header (3.[0-3])</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><classname>__gnu_cxx::new_allocator<T></classname></entry>
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<entry><filename class="headerfile">ext/new_allocator.h</filename></entry>
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<entry><classname>std::__new_alloc</classname></entry>
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<entry><filename class="headerfile">memory</filename></entry>
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</row>
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<row>
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<entry><classname>__gnu_cxx::malloc_allocator<T></classname></entry>
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<entry><filename class="headerfile">ext/malloc_allocator.h</filename></entry>
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<entry><classname>std::__malloc_alloc_template<int></classname></entry>
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<entry><filename class="headerfile">memory</filename></entry>
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</row>
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<row>
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<entry><classname>__gnu_cxx::debug_allocator<T></classname></entry>
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<entry><filename class="headerfile">ext/debug_allocator.h</filename></entry>
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<entry><classname>std::debug_alloc<T></classname></entry>
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<entry><filename class="headerfile">memory</filename></entry>
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</row>
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<row>
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<entry><classname>__gnu_cxx::__pool_alloc<T></classname></entry>
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<entry><filename class="headerfile">ext/pool_allocator.h</filename></entry>
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<entry><classname>std::__default_alloc_template<bool,int></classname></entry>
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<entry><filename class="headerfile">memory</filename></entry>
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</row>
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<row>
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<entry><classname>__gnu_cxx::__mt_alloc<T></classname></entry>
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<entry><filename class="headerfile">ext/mt_allocator.h</filename></entry>
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<entry> </entry>
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<entry> </entry>
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</row>
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<row>
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<entry><classname>__gnu_cxx::bitmap_allocator<T></classname></entry>
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<entry><filename class="headerfile">ext/bitmap_allocator.h</filename></entry>
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<entry> </entry>
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<entry> </entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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<para> Releases after gcc-3.4 have continued to add to the collection
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of available allocators. All of these new allocators are
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standard-style. The following table includes details, along with
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the first released version of GCC that included the extension allocator.
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</para>
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<table frame="all">
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<title>Extension Allocators Continued</title>
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<tgroup cols="3" align="left" colsep="1" rowsep="1">
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<colspec colname="c1"/>
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<colspec colname="c2"/>
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<colspec colname="c3"/>
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<thead>
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<row>
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<entry>Allocator</entry>
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<entry>Include</entry>
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<entry>Version</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><classname>__gnu_cxx::array_allocator<T></classname></entry>
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<entry><filename class="headerfile">ext/array_allocator.h</filename></entry>
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<entry>4.0.0</entry>
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</row>
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<row>
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<entry><classname>__gnu_cxx::throw_allocator<T></classname></entry>
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<entry><filename class="headerfile">ext/throw_allocator.h</filename></entry>
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<entry>4.2.0</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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<para>
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Debug mode first appears.
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</para>
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<para>
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Precompiled header support <acronym>PCH</acronym> support.
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</para>
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<para>
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Macro guard for changed, from <literal>_GLIBCPP_</literal> to <literal>_GLIBCXX_</literal>.
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</para>
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<para>
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Extension <filename class="headerfile">ext/stdio_sync_filebuf.h</filename> added.
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</para>
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<para>
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Extension <filename class="headerfile">ext/demangle.h</filename> added.
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</para>
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</section>
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<section xml:id="api.rel_400"><info><title><constant>4.0</constant></title></info>
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<para>
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</para>
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<para>
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TR1 features first appear.
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</para>
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<para>
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Extension allocator <filename class="headerfile">ext/array_allocator.h</filename> added.
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</para>
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<para>
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Extension <code>codecvt</code> specializations moved to <filename class="headerfile">ext/codecvt_specializations.h</filename>.
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</para>
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<para>
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Removal of <filename class="headerfile">ext/demangle.h</filename>.
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</para>
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</section>
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<section xml:id="api.rel_410"><info><title><constant>4.1</constant></title></info>
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<para>
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</para>
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<para>
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Removal of <filename class="headerfile">cassert</filename> from all standard headers: now has to be explicitly included for <code>std::assert</code> calls.
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</para>
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<para> Extensions for policy-based data structures first added. New includes,
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types, namespace <code>pb_assoc</code>.
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</para>
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<para> Extensions for typelists added in <filename class="headerfile">ext/typelist.h</filename>.
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</para>
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<para> Extension for policy-based <code>basic_string</code> first added: <code>__gnu_cxx::__versa_string</code> in <filename class="headerfile">ext/vstring.h</filename>.
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</para>
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</section>
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<section xml:id="api.rel_420"><info><title><constant>4.2</constant></title></info>
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<para>
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</para>
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<para> Default visibility attributes applied to <code>namespace std</code>. Support for <code>-fvisibility</code>.
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</para>
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<para>TR1 <filename class="headerfile">random</filename>, <filename class="headerfile">complex</filename>, and C compatibility headers added.</para>
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<para> Extensions for concurrent programming consolidated
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into <filename class="headerfile">ext/concurrence.h</filename> and <filename class="headerfile">ext/atomicity.h</filename>,
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including change of namespace to <code>__gnu_cxx</code> in some
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cases. Added types
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include <code>_Lock_policy</code>, <code>__concurrence_lock_error</code>, <code>__concurrence_unlock_error</code>, <code>__mutex</code>, <code>__scoped_lock</code>.</para>
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<para> Extensions for type traits consolidated
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into <filename class="headerfile">ext/type_traits.h</filename>. Additional traits are added
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(<code>__conditional_type</code>, <code>__enable_if</code>, others.)
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</para>
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<para> Extensions for policy-based data structures revised. New includes,
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types, namespace moved to <code>__pb_ds</code>.
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</para>
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<para> Extensions for debug mode modified: now nested in <code>namespace
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std::__debug</code> and extensions in <code>namespace
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__gnu_cxx::__debug</code>.</para>
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<para> Extensions added: <filename class="headerfile">ext/typelist.h</filename>
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and <filename class="headerfile">ext/throw_allocator.h</filename>.
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</para>
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</section>
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<section xml:id="api.rel_430"><info><title><constant>4.3</constant></title></info>
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<para>
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</para>
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<para>
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C++0X features first appear.
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</para>
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<para>TR1 <filename class="headerfile">regex</filename> and <filename class="headerfile">cmath</filename>'s mathematical special function added.
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</para>
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<para>
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Backward include edit.
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</para>
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<itemizedlist>
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<listitem>
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<para>Removed</para>
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<para>
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<filename class="headerfile">algobase.h</filename> <filename class="headerfile">algo.h</filename> <filename class="headerfile">alloc.h</filename> <filename class="headerfile">bvector.h</filename> <filename class="headerfile">complex.h</filename>
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<filename class="headerfile">defalloc.h</filename> <filename class="headerfile">deque.h</filename> <filename class="headerfile">fstream.h</filename> <filename class="headerfile">function.h</filename> <filename class="headerfile">hash_map.h</filename> <filename class="headerfile">hash_set.h</filename>
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<filename class="headerfile">hashtable.h</filename> <filename class="headerfile">heap.h</filename> <filename class="headerfile">iomanip.h</filename> <filename class="headerfile">iostream.h</filename> <filename class="headerfile">istream.h</filename> <filename class="headerfile">iterator.h</filename>
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<filename class="headerfile">list.h</filename> <filename class="headerfile">map.h</filename> <filename class="headerfile">multimap.h</filename> <filename class="headerfile">multiset.h</filename> <filename class="headerfile">new.h</filename> <filename class="headerfile">ostream.h</filename> <filename class="headerfile">pair.h</filename> <filename class="headerfile">queue.h</filename> <filename class="headerfile">rope.h</filename> <filename class="headerfile">set.h</filename> <filename class="headerfile">slist.h</filename> <filename class="headerfile">stack.h</filename> <filename class="headerfile">streambuf.h</filename> <filename class="headerfile">stream.h</filename> <filename class="headerfile">tempbuf.h</filename>
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<filename class="headerfile">tree.h</filename> <filename class="headerfile">vector.h</filename>
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</para>
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</listitem>
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<listitem>
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<para>Added</para>
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<para>
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<filename class="headerfile">hash_map</filename> and <filename class="headerfile">hash_set</filename>
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</para>
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</listitem>
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<listitem>
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<para>Added in C++11</para>
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<para>
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<filename class="headerfile">auto_ptr.h</filename> and <filename class="headerfile">binders.h</filename>
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</para>
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</listitem>
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</itemizedlist>
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<para>
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Header dependency streamlining.
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</para>
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<itemizedlist>
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<listitem><para><filename class="headerfile">algorithm</filename> no longer includes <filename class="headerfile">climits</filename>, <filename class="headerfile">cstring</filename>, or <filename class="headerfile">iosfwd</filename> </para></listitem>
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<listitem><para><filename class="headerfile">bitset</filename> no longer includes <filename class="headerfile">istream</filename> or <filename class="headerfile">ostream</filename>, adds <filename class="headerfile">iosfwd</filename> </para></listitem>
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<listitem><para><filename class="headerfile">functional</filename> no longer includes <filename class="headerfile">cstddef</filename></para></listitem>
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<listitem><para><filename class="headerfile">iomanip</filename> no longer includes <filename class="headerfile">istream</filename>, <filename class="headerfile">istream</filename>, or <filename class="headerfile">functional</filename>, adds <filename class="headerfile">ioswd</filename> </para></listitem>
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<listitem><para><filename class="headerfile">numeric</filename> no longer includes <filename class="headerfile">iterator</filename></para></listitem>
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<listitem><para><filename class="headerfile">string</filename> no longer includes <filename class="headerfile">algorithm</filename> or <filename class="headerfile">memory</filename></para></listitem>
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<listitem><para><filename class="headerfile">valarray</filename> no longer includes <filename class="headerfile">numeric</filename> or <filename class="headerfile">cstdlib</filename></para></listitem>
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<listitem><para><filename class="headerfile">tr1/hashtable</filename> no longer includes <filename class="headerfile">memory</filename> or <filename class="headerfile">functional</filename></para></listitem>
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<listitem><para><filename class="headerfile">tr1/memory</filename> no longer includes <filename class="headerfile">algorithm</filename></para></listitem>
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<listitem><para><filename class="headerfile">tr1/random</filename> no longer includes <filename class="headerfile">algorithm</filename> or <filename class="headerfile">fstream</filename></para></listitem>
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</itemizedlist>
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<para>
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Debug mode for <filename class="headerfile">unordered_map</filename> and <filename class="headerfile">unordered_set</filename>.
|
|
</para>
|
|
|
|
<para>
|
|
Parallel mode first appears.
|
|
</para>
|
|
|
|
<para>Variadic template implementations of items in <filename class="headerfile">tuple</filename> and
|
|
<filename class="headerfile">functional</filename>.
|
|
</para>
|
|
|
|
<para>Default <code>what</code> implementations give more elaborate
|
|
exception strings for <code>bad_cast</code>,
|
|
<code>bad_typeid</code>, <code>bad_exception</code>, and
|
|
<code>bad_alloc</code>.
|
|
</para>
|
|
|
|
<para>
|
|
PCH binary files no longer installed. Instead, the source files are installed.
|
|
</para>
|
|
|
|
<para>
|
|
Namespace pb_ds moved to __gnu_pb_ds.
|
|
</para>
|
|
|
|
</section>
|
|
|
|
|
|
<section xml:id="api.rel_440"><info><title><constant>4.4</constant></title></info>
|
|
|
|
<para>
|
|
</para>
|
|
|
|
<para>
|
|
C++0X features.
|
|
</para>
|
|
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>
|
|
Added.
|
|
</para>
|
|
<para>
|
|
<filename class="headerfile">atomic</filename>,
|
|
<filename class="headerfile">chrono</filename>,
|
|
<filename class="headerfile">condition_variable</filename>,
|
|
<filename class="headerfile">forward_list</filename>,
|
|
<filename class="headerfile">initializer_list</filename>,
|
|
<filename class="headerfile">mutex</filename>,
|
|
<filename class="headerfile">ratio</filename>,
|
|
<filename class="headerfile">thread</filename>
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Updated and improved.
|
|
</para>
|
|
<para>
|
|
<filename class="headerfile">algorithm</filename>,
|
|
<filename class="headerfile">system_error</filename>,
|
|
<filename class="headerfile">type_traits</filename>
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Use of the GNU extension namespace association converted to inline namespaces.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Preliminary support for <classname>initializer_list</classname>
|
|
and defaulted and deleted constructors in container classes.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
<classname>unique_ptr</classname>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Support for new character types <type>char16_t</type>
|
|
and <type>char32_t</type> added
|
|
to <classname>char_traits</classname>, <classname>basic_string</classname>, <classname>numeric_limits</classname>,
|
|
and assorted compile-time type traits.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Support for string conversions <function>to_string</function>
|
|
and <function>to_wstring</function>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Member functions taking string arguments were added to iostreams
|
|
including <classname>basic_filebuf</classname>, <classname>basic_ofstream</classname>,
|
|
and <classname>basic_ifstream</classname>.
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Exception propagation support,
|
|
including <classname>exception_ptr</classname>, <function>current_exception</function>, <function>copy_exception</function>,
|
|
and <function>rethrow_exception</function>.
|
|
</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
|
|
<para>
|
|
Uglification of <literal>try</literal> to <literal>__try</literal>
|
|
and <literal>catch</literal> to <literal>__catch</literal>.
|
|
</para>
|
|
|
|
<para>
|
|
Audit of internal mutex usage, conversion to functions returning static
|
|
local mutex.
|
|
</para>
|
|
|
|
<para> Extensions
|
|
added: <filename class="headerfile">ext/pointer.h</filename>
|
|
and <filename class="headerfile">ext/extptr_allocator.h</filename>. Support
|
|
for non-standard pointer types has been added
|
|
to <classname>vector</classname>
|
|
and <classname>forward_list</classname>.
|
|
</para>
|
|
</section>
|
|
|
|
<section xml:id="api.rel_450"><info><title><constant>4.5</constant></title></info>
|
|
|
|
<para>
|
|
</para>
|
|
|
|
<para>
|
|
C++0X features.
|
|
</para>
|
|
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>
|
|
Added.
|
|
</para>
|
|
<para>
|
|
<filename class="headerfile">functional</filename>,
|
|
<filename class="headerfile">future</filename>,
|
|
<filename class="headerfile">random</filename>
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Updated and improved.
|
|
</para>
|
|
<para>
|
|
<filename class="headerfile">atomic</filename>,
|
|
<filename class="headerfile">system_error</filename>,
|
|
<filename class="headerfile">type_traits</filename>
|
|
</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>
|
|
Add support for explicit operators and standard layout types.
|
|
</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para>
|
|
Profile mode first appears.
|
|
</para>
|
|
|
|
<para>
|
|
Support for decimal floating-point arithmetic, including <classname>decimal32</classname>, <classname>decimal64</classname>, and <classname>decimal128</classname>.
|
|
</para>
|
|
|
|
<para>
|
|
Python pretty-printers are added for use with appropriately-advanced versions of <command>gdb</command>.
|
|
</para>
|
|
|
|
<para>
|
|
Audit for application of function attributes notrow, const, pure, and noreturn.
|
|
</para>
|
|
|
|
<para>
|
|
The default behavior for comparing typeinfo names changed, so
|
|
in <filename class="headerfile">typeinfo</filename>, <literal>__GXX_MERGED_TYPEINFO_NAMES</literal>
|
|
now defaults to zero.
|
|
</para>
|
|
|
|
<para> Extensions modified: <filename class="headerfile">ext/throw_allocator.h</filename>.
|
|
</para>
|
|
</section>
|
|
|
|
</section>
|