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<div><h2 class="title">
<a name="interprocess"></a>Chapter&#160;14.&#160;Boost.Interprocess</h2></div>
<div><div class="author"><h3 class="author">
<span class="firstname">Ion</span> <span class="surname">Gaztanaga</span>
</h3></div></div>
<div><p class="copyright">Copyright &#169; 2005-2015 Ion Gaztanaga</p></div>
<div><div class="legalnotice">
<a name="interprocess.legal"></a><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>)
      </p>
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<div class="toc">
<p><b>Table of Contents</b></p>
<dl class="toc">
<dt><span class="section"><a href="interprocess.html#interprocess.intro">Introduction</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess.html#interprocess.intro.introduction_building_interprocess">Building
      Boost.Interprocess</a></span></dt>
<dt><span class="section"><a href="interprocess.html#interprocess.intro.tested_compilers">Tested compilers</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/quick_guide.html">Quick Guide for the Impatient</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/quick_guide.html#interprocess.quick_guide.qg_memory_pool">Using shared
      memory as a pool of unnamed memory blocks</a></span></dt>
<dt><span class="section"><a href="interprocess/quick_guide.html#interprocess.quick_guide.qg_named_interprocess">Creating
      named shared memory objects</a></span></dt>
<dt><span class="section"><a href="interprocess/quick_guide.html#interprocess.quick_guide.qg_offset_ptr">Using an offset
      smart pointer for shared memory</a></span></dt>
<dt><span class="section"><a href="interprocess/quick_guide.html#interprocess.quick_guide.qg_interprocess_container">Creating
      vectors in shared memory</a></span></dt>
<dt><span class="section"><a href="interprocess/quick_guide.html#interprocess.quick_guide.qg_interprocess_map">Creating
      maps in shared memory</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/some_basic_explanations.html">Some basic explanations</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/some_basic_explanations.html#interprocess.some_basic_explanations.processes_and_threads">Processes
      And Threads</a></span></dt>
<dt><span class="section"><a href="interprocess/some_basic_explanations.html#interprocess.some_basic_explanations.sharing_information">Sharing
      information between processes</a></span></dt>
<dt><span class="section"><a href="interprocess/some_basic_explanations.html#interprocess.some_basic_explanations.persistence">Persistence
      Of Interprocess Mechanisms</a></span></dt>
<dt><span class="section"><a href="interprocess/some_basic_explanations.html#interprocess.some_basic_explanations.names">Names Of
      Interprocess Mechanisms</a></span></dt>
<dt><span class="section"><a href="interprocess/some_basic_explanations.html#interprocess.some_basic_explanations.constructors_destructors_and_resource_lifetime">Constructors,
      destructors and lifetime of Interprocess named resources</a></span></dt>
<dt><span class="section"><a href="interprocess/some_basic_explanations.html#interprocess.some_basic_explanations.permissions">Permissions</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/sharedmemorybetweenprocesses.html">Sharing memory
    between processes</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/sharedmemorybetweenprocesses.html#interprocess.sharedmemorybetweenprocesses.sharedmemory">Shared
      memory</a></span></dt>
<dt><span class="section"><a href="interprocess/sharedmemorybetweenprocesses.html#interprocess.sharedmemorybetweenprocesses.mapped_file">Memory
      Mapped Files</a></span></dt>
<dt><span class="section"><a href="interprocess/sharedmemorybetweenprocesses.html#interprocess.sharedmemorybetweenprocesses.mapped_region">More
      About Mapped Regions</a></span></dt>
<dt><span class="section"><a href="interprocess/sharedmemorybetweenprocesses.html#interprocess.sharedmemorybetweenprocesses.mapped_region_object_limitations">Limitations
      When Constructing Objects In Mapped Regions</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/offset_ptr.html">Mapping Address Independent Pointer:
    offset_ptr</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html">Synchronization
    mechanisms</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.synchronization_mechanisms_overview">Synchronization
      mechanisms overview</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.mutexes">Mutexes</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.conditions">Conditions</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.semaphores">Semaphores</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.sharable_upgradable_mutexes">Sharable
      and Upgradable Mutexes</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.lock_conversions">Lock
      Transfers Through Move Semantics</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.file_lock">File
      Locks</a></span></dt>
<dt><span class="section"><a href="interprocess/synchronization_mechanisms.html#interprocess.synchronization_mechanisms.message_queue">Message
      Queue</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/managed_memory_segments.html">Managed Memory Segments</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/managed_memory_segments.html#interprocess.managed_memory_segments.making_ipc_easy">Making
      Interprocess Data Communication Easy</a></span></dt>
<dt><span class="section"><a href="interprocess/managed_memory_segments.html#interprocess.managed_memory_segments.managed_shared_memory">Managed
      Shared Memory</a></span></dt>
<dt><span class="section"><a href="interprocess/managed_memory_segments.html#interprocess.managed_memory_segments.managed_mapped_files">Managed
      Mapped File</a></span></dt>
<dt><span class="section"><a href="interprocess/managed_memory_segments.html#interprocess.managed_memory_segments.managed_memory_segment_features">Managed
      Memory Segment Features</a></span></dt>
<dt><span class="section"><a href="interprocess/managed_memory_segments.html#interprocess.managed_memory_segments.managed_memory_segment_advanced_features">Managed
      Memory Segment Advanced Features</a></span></dt>
<dt><span class="section"><a href="interprocess/managed_memory_segments.html#interprocess.managed_memory_segments.managed_heap_memory_external_buffer">Managed
      Heap Memory And Managed External Buffer</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/allocators_containers.html">Allocators, containers
    and memory allocation algorithms</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/allocators_containers.html#interprocess.allocators_containers.allocator_introduction">Introduction
      to Interprocess allocators</a></span></dt>
<dt><span class="section"><a href="interprocess/allocators_containers.html#interprocess.allocators_containers.stl_allocators_segregated_storage">Segregated
      storage node allocators</a></span></dt>
<dt><span class="section"><a href="interprocess/allocators_containers.html#interprocess.allocators_containers.stl_allocators_adaptive">Adaptive
      pool node allocators</a></span></dt>
<dt><span class="section"><a href="interprocess/allocators_containers.html#interprocess.allocators_containers.containers_explained">Interprocess
      and containers in managed memory segments</a></span></dt>
<dt><span class="section"><a href="interprocess/allocators_containers.html#interprocess.allocators_containers.additional_containers">Boost
      containers compatible with Boost.Interprocess</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/memory_algorithms.html">Memory allocation algorithms</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/memory_algorithms.html#interprocess.memory_algorithms.simple_seq_fit">simple_seq_fit:
      A simple shared memory management algorithm</a></span></dt>
<dt><span class="section"><a href="interprocess/memory_algorithms.html#interprocess.memory_algorithms.rbtree_best_fit">rbtree_best_fit:
      Best-fit logarithmic-time complexity allocation</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/streams.html">Direct iostream formatting: vectorstream
    and bufferstream</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/streams.html#interprocess.streams.vectorstream">Formatting directly
      in your character vector: vectorstream</a></span></dt>
<dt><span class="section"><a href="interprocess/streams.html#interprocess.streams.bufferstream">Formatting directly
      in your character buffer: bufferstream</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/interprocess_smart_ptr.html">Ownership smart pointers</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/interprocess_smart_ptr.html#interprocess.interprocess_smart_ptr.intrusive_ptr">Intrusive
      pointer</a></span></dt>
<dt><span class="section"><a href="interprocess/interprocess_smart_ptr.html#interprocess.interprocess_smart_ptr.scoped_ptr">Scoped
      pointer</a></span></dt>
<dt><span class="section"><a href="interprocess/interprocess_smart_ptr.html#interprocess.interprocess_smart_ptr.shared_ptr">Shared
      pointer and weak pointer</a></span></dt>
<dt><span class="section"><a href="interprocess/interprocess_smart_ptr.html#interprocess.interprocess_smart_ptr.unique_ptr">Unique
      pointer</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/architecture.html">Architecture and internals</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/architecture.html#interprocess.architecture.basic_guidelines">Basic guidelines</a></span></dt>
<dt><span class="section"><a href="interprocess/architecture.html#interprocess.architecture.architecture_algorithm_to_managed">From
      the memory algorithm to the managed segment</a></span></dt>
<dt><span class="section"><a href="interprocess/architecture.html#interprocess.architecture.allocators_containers">Allocators
      and containers</a></span></dt>
<dt><span class="section"><a href="interprocess/architecture.html#interprocess.architecture.performance">Performance of
      Boost.Interprocess</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/customizing_interprocess.html">Customizing Boost.Interprocess</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/customizing_interprocess.html#interprocess.customizing_interprocess.custom_interprocess_alloc">Writing
      a new shared memory allocation algorithm</a></span></dt>
<dt><span class="section"><a href="interprocess/customizing_interprocess.html#interprocess.customizing_interprocess.custom_allocators">Building
      custom STL compatible allocators for Boost.Interprocess</a></span></dt>
<dt><span class="section"><a href="interprocess/customizing_interprocess.html#interprocess.customizing_interprocess.custom_indexes">Building
      custom indexes</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/acknowledgements_notes.html">Acknowledgements,
    notes and links</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows">Notes
      for Windows users</a></span></dt>
<dt><span class="section"><a href="interprocess/acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_linux">Notes
      for Linux users</a></span></dt>
<dt><span class="section"><a href="interprocess/acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to">Thanks
      to...</a></span></dt>
<dt><span class="section"><a href="interprocess/acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes">Release
      Notes</a></span></dt>
<dt><span class="section"><a href="interprocess/acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links">Books
      and interesting links</a></span></dt>
<dt><span class="section"><a href="interprocess/acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements">Future
      improvements...</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="interprocess/indexes_reference.html">Indexes and Reference</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="interprocess/indexes_reference.html#interprocess.indexes_reference.index">Indexes</a></span></dt>
<dt><span class="section"><a href="interprocess/indexes_reference.html#boost_interprocess_header_reference">Boost.Interprocess Header Reference</a></span></dt>
</dl></dd>
</dl>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="interprocess.intro"></a><a class="link" href="interprocess.html#interprocess.intro" title="Introduction">Introduction</a>
</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="interprocess.html#interprocess.intro.introduction_building_interprocess">Building
      Boost.Interprocess</a></span></dt>
<dt><span class="section"><a href="interprocess.html#interprocess.intro.tested_compilers">Tested compilers</a></span></dt>
</dl></div>
<p>
      <span class="bold"><strong>Boost.Interprocess</strong></span> simplifies the use of common
      interprocess communication and synchronization mechanisms and offers a wide
      range of them:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          Shared memory.
        </li>
<li class="listitem">
          Memory-mapped files.
        </li>
<li class="listitem">
          Semaphores, mutexes, condition variables and upgradable mutex types to
          place them in shared memory and memory mapped files.
        </li>
<li class="listitem">
          Named versions of those synchronization objects, similar to UNIX/Windows
          sem_open/CreateSemaphore API.
        </li>
<li class="listitem">
          File locking.
        </li>
<li class="listitem">
          Relative pointers.
        </li>
<li class="listitem">
          Message queues.
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Boost.Interprocess</strong></span> also offers higher-level
      interprocess mechanisms to allocate dynamically portions of a shared memory
      or a memory mapped file (in general, to allocate portions of a fixed size memory
      segment). Using these mechanisms, <span class="bold"><strong>Boost.Interprocess</strong></span>
      offers useful tools to construct C++ objects, including STL-like containers,
      in shared memory and memory mapped files:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          Dynamic creation of anonymous and named objects in a shared memory or memory
          mapped file.
        </li>
<li class="listitem">
          STL-like containers compatible with shared memory/memory-mapped files.
        </li>
<li class="listitem">
          STL-like allocators ready for shared memory/memory-mapped files implementing
          several memory allocation patterns (like pooling).
        </li>
</ul></div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.intro.introduction_building_interprocess"></a><a class="link" href="interprocess.html#interprocess.intro.introduction_building_interprocess" title="Building Boost.Interprocess">Building
      Boost.Interprocess</a>
</h3></div></div></div>
<p>
        There is no need to compile <span class="bold"><strong>Boost.Interprocess</strong></span>,
        since it's a header only library. Just include your Boost header directory
        in your compiler include path.
      </p>
<p>
        <span class="bold"><strong>Boost.Interprocess</strong></span> depends on <a href="http://www.boost.org/libs/date_time/" target="_top"><span class="bold"><strong>Boost.DateTime</strong></span></a>, which needs separate compilation.
        However, the subset used by <span class="bold"><strong>Boost.Interprocess</strong></span>
        does not need any separate compilation so the user can define <code class="computeroutput"><span class="identifier">BOOST_DATE_TIME_NO_LIB</span></code> to avoid Boost from
        trying to automatically link the <span class="bold"><strong>Boost.DateTime</strong></span>.
      </p>
<p>
        In POSIX systems, <span class="bold"><strong>Boost.Interprocess</strong></span> uses
        pthread system calls to implement classes like mutexes, condition variables,
        etc... In some operating systems, these POSIX calls are implemented in separate
        libraries that are not automatically linked by the compiler. For example,
        in some Linux systems POSIX pthread functions are implemented in <code class="computeroutput"><span class="identifier">librt</span><span class="special">.</span><span class="identifier">a</span></code> library, so you might need to add that
        library when linking an executable or shared library that uses <span class="bold"><strong>Boost.Interprocess</strong></span>. If you obtain linking errors related
        to those pthread functions, please revise your system's documentation to
        know which library implements them.
      </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.intro.tested_compilers"></a><a class="link" href="interprocess.html#interprocess.intro.tested_compilers" title="Tested compilers">Tested compilers</a>
</h3></div></div></div>
<p>
        <span class="bold"><strong>Boost.Interprocess</strong></span> has been tested in the
        following compilers/platforms:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            Visual &gt;= 7.1
          </li>
<li class="listitem">
            GCC &gt;= 4.1
          </li>
<li class="listitem">
            Intel 11
          </li>
</ul></div>
</div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: December 14, 2015 at 09:17:47 GMT</small></p></td>
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