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<div class="section" title="Acknowledgements, notes and links">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="interprocess.acknowledgements_notes"></a><a class="link" href="acknowledgements_notes.html" title="Acknowledgements, notes and links"> Acknowledgements,
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</h2></div></div></div>
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<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to"> Thanks
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<a name="interprocess.acknowledgements_notes.thanks_to"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to" title="Thanks to..."> Thanks
to...</a>
</h3></div></div></div>
<div class="toc"><dl>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to.thanks_to_people">
People</a></span></dt>
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License notes</a></span></dt>
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<div class="section" title="People">
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<a name="interprocess.acknowledgements_notes.thanks_to.thanks_to_people"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to.thanks_to_people" title="People">
People</a>
</h4></div></div></div>
<p>
Many people have contributed with ideas and revisions, so this is the place
to thank them:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Thanks to all people who have shown interest in the library and have
downloaded and tested the snapshots.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Francis Andre</strong></span> and <span class="bold"><strong>Anders Hybertz</strong></span> for their ideas and suggestions.
Many of them are not implemented yet but I hope to include them when
library gets some stability.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Matt Doyle</strong></span>, <span class="bold"><strong>Steve
LoBasso</strong></span>, <span class="bold"><strong>Glenn Schrader</strong></span>,
<span class="bold"><strong>Hiang Swee Chiang</strong></span>, <span class="bold"><strong>Phil
Endecott</strong></span>, <span class="bold"><strong>Rene Rivera</strong></span>, <span class="bold"><strong>Harold Pirtle</strong></span>, <span class="bold"><strong>Paul Ryan</strong></span>,
<span class="bold"><strong>Shumin Wu</strong></span>, <span class="bold"><strong>Michal
Wozniak</strong></span>, <span class="bold"><strong>Peter Johnson</strong></span>,
<span class="bold"><strong>Alex Ott</strong></span>, <span class="bold"><strong>Shane
Guillory</strong></span>, <span class="bold"><strong>Steven Wooding</strong></span>
and <span class="bold"><strong>Kim Barrett</strong></span> for their bug fixes
and library testing.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Martin Adrian</strong></span> who suggested
the use of Interprocess framework for user defined buffers.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Synge Todo</strong></span> for his boostbook-doxygen
patch to improve Interprocess documentation.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Olaf Krzikalla</strong></span> for his Intrusive
library. I have taken some ideas to improve red black tree implementation
from his library.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Daniel James</strong></span> for his unordered_map/set
family and his help with allocators. His great unordered implementation
has been a reference to design exception safe containers.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Howard Hinnant</strong></span> for his amazing
help, specially explaining allocator swapping, move semantics and for
developing upgradable mutex and lock transfer features.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Pavel Vozenilek</strong></span> for his continuous
review process, suggestions, code and help. He is the major supporter
of Interprocess library. The library has grown with his many and great
advices.
</li>
<li class="listitem">
And finally, thank you to all Boosters. <span class="bold"><strong>Long live
to C++!</strong></span>
</li>
</ul></div>
</div>
<div class="section" title="License notes">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.thanks_to.thanks_to_license_notes"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to.thanks_to_license_notes" title="License notes">
License notes</a>
</h4></div></div></div>
<p>
<span class="bold"><strong>Boost.Interprocess</strong></span> STL containers are
based on the SGI STL library implementation:
</p>
<p>
Copyright (c) 1996,1997 Silicon Graphics Computer Systems, Inc. Permission
to use, copy, modify, distribute and sell this software and its documentation
for any purpose is hereby granted without fee, provided that the above
copyright notice appear in all copies and that both that copyright notice
and this permission notice appear in supporting documentation. Silicon
Graphics makes no representations about the suitability of this software
for any purpose. It is provided "as is" without express or implied
warranty.
</p>
<p>
Copyright (c) 1994 Hewlett-Packard Company Permission to use, copy, modify,
distribute and sell this software and its documentation for any purpose
is hereby granted without fee, provided that the above copyright notice
appear in all copies and that both that copyright notice and this permission
notice appear in supporting documentation. Hewlett-Packard Company makes
no representations about the suitability of this software for any purpose.
It is provided "as is" without express or implied warranty.
</p>
</div>
</div>
<div class="section" title="Release Notes">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.release_notes"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes" title="Release Notes"> Release
Notes</a>
</h3></div></div></div>
<div class="toc"><dl>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00">
Boost 1.41 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00">
Boost 1.40 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00">
Boost 1.39 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00">
Boost 1.38 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00">
Boost 1.37 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00">
Boost 1.36 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00">
Boost 1.35 Release</a></span></dt>
</dl></div>
<div class="section" title="Boost 1.41 Release">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00" title="Boost 1.41 Release">
Boost 1.41 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Support for POSIX shared memory in Mac OS.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Generic <code class="computeroutput"><span class="identifier">semaphore</span></code> and <code class="computeroutput"><span class="identifier">named_semaphore</span></code>
now implemented more efficiently with atomic operations.
</li>
<li class="listitem">
More robust file opening in Windows platforms with active Anti-virus
software.
</li>
</ul></div>
</div>
<div class="section" title="Boost 1.40 Release">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00" title="Boost 1.40 Release">
Boost 1.40 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Windows shared memory is created in Shared Documents folder so that it
can be shared between services and processes
</li>
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2967" target="_top">#2967</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2973" target="_top">#2973</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2992" target="_top">#2992</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3138" target="_top">#3138</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3166" target="_top">#3166</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3205" target="_top">#3205</a>.
</li>
</ul></div>
</div>
<div class="section" title="Boost 1.39 Release">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00" title="Boost 1.39 Release">
Boost 1.39 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Added experimental <code class="computeroutput"><span class="identifier">stable_vector</span></code>
container.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">shared_memory_object</span><span class="special">::</span><span class="identifier">remove</span></code>
has now POSIX <code class="computeroutput"><span class="identifier">unlink</span></code>
semantics and <code class="computeroutput"><span class="identifier">file_mapping</span><span class="special">::</span><span class="identifier">remove</span></code>
was added to obtain POSIX <code class="computeroutput"><span class="identifier">unlink</span></code>
semantics with mapped files.
</li>
<li class="listitem">
Shared memory in windows has now kernel lifetime instead of filesystem
lifetime: shared memory will disappear when the system reboots.
</li>
<li class="listitem">
Updated move semantics.
</li>
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2722" target="_top">#2722</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2729" target="_top">#2729</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2766" target="_top">#2766</a>,
<a href="https://svn.boost.org/trac/boost/ticket/1390" target="_top">#1390</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2589" target="_top">#2589</a>,
</li>
</ul></div>
</div>
<div class="section" title="Boost 1.38 Release">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00" title="Boost 1.38 Release">
Boost 1.38 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Updated documentation to show rvalue-references funcions instead of emulation
functions.
</li>
<li class="listitem">
More non-copyable classes are now movable.
</li>
<li class="listitem">
Move-constructor and assignments now leave moved object in default-constructed
state instead of just swapping contents.
</li>
<li class="listitem">
Several bugfixes ( <a href="https://svn.boost.org/trac/boost/ticket/2391" target="_top">#2391</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2431" target="_top">#2431</a>,
<a href="https://svn.boost.org/trac/boost/ticket/1390" target="_top">#1390</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2570" target="_top">#2570</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2528" target="_top">#2528</a>.
</li>
</ul></div>
</div>
<div class="section" title="Boost 1.37 Release">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00" title="Boost 1.37 Release">
Boost 1.37 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Containers can be used now in recursive types.
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_FORCE_GENERIC_EMULATION</span></code>
macro option to force the use of generic emulation code for process-shared
synchronization primitives instead of native POSIX functions.
</li>
<li class="listitem">
Added placement insertion members to containers
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">pos_inf</span></code> value is now handled portably
for timed functions.
</li>
<li class="listitem">
Update some function parameters from <code class="computeroutput"><span class="identifier">iterator</span></code>
to <code class="computeroutput"><span class="identifier">const_iterator</span></code> in
containers to keep up with the draft of the next standard.
</li>
<li class="listitem">
Documentation fixes.
</li>
</ul></div>
</div>
<div class="section" title="Boost 1.36 Release">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00" title="Boost 1.36 Release">
Boost 1.36 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Added anonymous shared memory for UNIX systems.
</li>
<li class="listitem">
Fixed erroneous <code class="computeroutput"><span class="keyword">void</span></code> return
types from <code class="computeroutput"><span class="identifier">flat_map</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code>
functions.
</li>
<li class="listitem">
Fixed missing move semantics on managed memory classes.
</li>
<li class="listitem">
Added copy_on_write and open_read_only options for shared memory and
mapped file managed classes.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Added to <code class="computeroutput"><span class="identifier">mapped_region</span></code> the mode used to create
it.
</li>
<li class="listitem">
Corrected instantiation errors in void allocators.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">shared_ptr</span></code> is movable
and supports aliasing.
</li>
</ul></div>
</div>
<div class="section" title="Boost 1.35 Release">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00" title="Boost 1.35 Release">
Boost 1.35 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Added auxiliary utilities to ease the definition and construction of
<code class="computeroutput"><a class="link" href="../boost/interprocess/shared_ptr.html" title="Class template shared_ptr">shared_ptr</a></code>,
<code class="computeroutput"><a class="link" href="../boost/interprocess/weak_ptr.html" title="Class template weak_ptr">weak_ptr</a></code> and
<code class="computeroutput"><a class="link" href="../boost/interprocess/unique_ptr.html" title="Class template unique_ptr">unique_ptr</a></code>.
Added explanations and examples of these smart pointers in the documentation.
</li>
<li class="listitem">
Optimized vector:
<div class="itemizedlist"><ul class="itemizedlist" type="circle">
<li class="listitem">
1) Now works with raw pointers as much as possible when using allocators
defining <code class="computeroutput"><span class="identifier">pointer</span></code>
as an smart pointer. This increases performance and improves compilation
times.
</li>
<li class="listitem">
2) A bit of metaprogramming to avoid using move_iterator when the
type has trivial copy constructor or assignment and improve performance.
</li>
<li class="listitem">
3) Changed custom algorithms with standard ones to take advantage
of optimized standard algorithms.
</li>
<li class="listitem">
4) Removed unused code.
</li>
</ul></div>
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Containers don't derive
from allocators, to avoid problems with allocators that might define
virtual functions with the same names as container member functions.
That would convert container functions in virtual functions and might
disallow some of them if the returned type does not lead to a covariant
return. Allocators are now stored as base classes of internal structs.
</li>
<li class="listitem">
Implemented <code class="computeroutput"><a class="link" href="../boost/interprocess/named_mutex.html" title="Class named_mutex">named_mutex</a></code>
and <code class="computeroutput"><a class="link" href="../boost/interprocess/named_semaphore.html" title="Class named_semaphore">named_semaphore</a></code>
with POSIX named semaphores in systems supporting that option. <code class="computeroutput"><a class="link" href="../boost/interprocess/named_condition.html" title="Class named_condition">named_condition</a></code>
has been accordingly changed to support interoperability with <code class="computeroutput"><a class="link" href="../boost/interprocess/named_mutex.html" title="Class named_mutex">named_mutex</a></code>.
</li>
<li class="listitem">
Reduced template bloat for node and adaptive allocators extracting node
implementation to a class that only depends on the memory algorithm,
instead of the segment manager + node size + node number...
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">mapped_region</span></code>
in UNIX when mapping address was provided but the region was mapped in
another address.
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">aligned_allocate</span></code>
and <code class="computeroutput"><span class="identifier">allocate_many</span></code> functions
to managed memory segments.
</li>
<li class="listitem">
Improved documentation about managed memory segments.
</li>
<li class="listitem">
<span class="bold"><strong>Boost.Interprocess</strong></span> containers are now
documented in the Reference section.
</li>
<li class="listitem">
Correction of typos and documentation errors.
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">get_instance_name</span></code>,
<code class="computeroutput"><span class="identifier">get_instance_length</span></code> and
<code class="computeroutput"><span class="identifier">get_instance_type</span></code> functions
to managed memory segments.
</li>
<li class="listitem">
Corrected suboptimal buffer expansion bug in <code class="computeroutput"><span class="identifier">rbtree_best_fit</span></code>.
</li>
<li class="listitem">
Added iteration of named and unique objects in a segment manager.
</li>
<li class="listitem">
Fixed leak in <code class="computeroutput">vector</code>.
</li>
<li class="listitem">
Added support for Solaris.
</li>
<li class="listitem">
Optimized <code class="computeroutput"><a class="link" href="../boost/interprocess/segment_manager.html" title="Class template segment_manager">segment_manager</a></code>
to avoid code bloat associated with templated instantiations.
</li>
<li class="listitem">
Fixed bug for UNIX: No slash ('/') was being added as the first character
for shared memory names, leading to errors in some UNIX systems.
</li>
<li class="listitem">
Fixed bug in VC-8.0: Broken function inlining in core offset_ptr functions.
</li>
<li class="listitem">
Code examples changed to use new BoostBook code import features.
</li>
<li class="listitem">
Added aligned memory allocation function to memory algorithms.
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">clear</span><span class="special">()</span></code>
and <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code>,
they were declared private.
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code>.
Thanks to Steve LoBasso.
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">atomic_dec32</span><span class="special">()</span></code>. Thanks to Glenn Schrader.
</li>
<li class="listitem">
Improved (multi)map/(multi)set constructors taking iterators. Now those
have linear time if the iterator range is already sorted.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: (multi)map/(multi)set
now reduce their node size. The color bit is embedded in the parent pointer.
Now, the size of a node is the size of 3 pointers in most systems. This
optimization is activated for raw and <code class="computeroutput"><span class="identifier">offset_ptr</span></code>
pointers.
</li>
<li class="listitem">
(multi)map/(multi)set now reuse memory from old nodes in the assignment
operator.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Implemented node-containers
based on intrusive containers. This saves code size, since many instantiations
share the same algorithms.
</li>
<li class="listitem">
Corrected code to be compilable with Visual C++ 8.0.
</li>
<li class="listitem">
Added function to zero free memory in memory algorithms and the segment
manager. This function is useful for security reasons and to improve
compression ratios for files created with <code class="computeroutput"><span class="identifier">managed_mapped_file</span></code>.
</li>
<li class="listitem">
Added support for intrusive index types in managed memory segments. Intrusive
indexes save extra memory allocations to allocate the index since with
just one allocation, we allocate room for the value, the name and the
hook to insert the object in the index.
</li>
<li class="listitem">
Created new index type: <span class="bold"><strong>iset_index</strong></span>.
It's an index based on an intrusive set (rb-tree).
</li>
<li class="listitem">
Created new index type: <span class="bold"><strong>iunordered_set_index</strong></span>.
It's an index based on a pseudo-intrusive unordered set (hash table).
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: The intrusive index <span class="bold"><strong>iset_index</strong></span> is now the default index type.
</li>
<li class="listitem">
Optimized vector to take advantage of <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_trivial_destructor</span></code>.
This optimization avoids calling destructors of elements that have a
trivial destructor.
</li>
<li class="listitem">
Optimized vector to take advantage of <code class="computeroutput"><span class="identifier">has_trivial_destructor_after_move</span></code>
trait. This optimization avoids calling destructors of elements that
have a trivial destructor if the element has been moved (which is the
case of many movable types). This trick was provided by Howard Hinnant.
</li>
<li class="listitem">
Added security check to avoid integer overflow bug in allocators and
named construction functions.
</li>
<li class="listitem">
Added alignment checks to forward and backwards expansion functions.
</li>
<li class="listitem">
Fixed bug in atomic functions for PPC.
</li>
<li class="listitem">
Fixed race-condition error when creating and opening a managed segment.
</li>
<li class="listitem">
Added adaptive pools.
</li>
<li class="listitem">
<span class="bold"><strong>Source breaking</strong></span>: Changed node allocators'
template parameter order to make them easier to use.
</li>
<li class="listitem">
Added support for native windows shared memory.
</li>
<li class="listitem">
Added more tests.
</li>
<li class="listitem">
Corrected the presence of private functions in the reference section.
</li>
<li class="listitem">
Added function (<code class="computeroutput"><span class="identifier">deallocate_free_chunks</span><span class="special">()</span></code>) to manually deallocate completely
free chunks from node allocators.
</li>
<li class="listitem">
Implemented N1780 proposal to LWG issue 233: <span class="emphasis"><em>Insertion hints
in associative containers</em></span> in interprocess <code class="computeroutput">multiset</code>
and <code class="computeroutput">multimap</code>
classes.
</li>
<li class="listitem">
<span class="bold"><strong>Source breaking</strong></span>: A shared memory object
is now used including <code class="computeroutput"><span class="identifier">shared_memory_object</span><span class="special">.</span><span class="identifier">hpp</span></code>
header instead of <code class="computeroutput"><span class="identifier">shared</span> <span class="identifier">memory</span><span class="special">.</span><span class="identifier">hpp</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Changed global mutex when
initializing managed shared memory and memory mapped files. This change
tries to minimize deadlocks.
</li>
<li class="listitem">
<span class="bold"><strong>Source breaking</strong></span>: Changed shared memory,
memory mapped files and mapped region's open mode to a single <code class="computeroutput"><span class="identifier">mode_t</span></code> type.
</li>
<li class="listitem">
Added extra WIN32_LEAN_AND_MEAN before including DateTime headers to
avoid socket redefinition errors when using Interprocess and Asio in
windows.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: <code class="computeroutput"><span class="identifier">mapped_region</span></code>
constructor no longer requires classes derived from memory_mappable,
but classes must fulfill the MemoryMappable concept.
</li>
<li class="listitem">
Added in-place reallocation capabilities to basic_string.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Reimplemented and optimized
small string optimization. The narrow string class has zero byte overhead
with an internal 11 byte buffer in 32 systems!
</li>
<li class="listitem">
Added move semantics to containers. Improves performance when using containers
of containers.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: End nodes of node containers
(list, slist, map/set) are now embedded in the containers instead of
allocated using the allocator. This allows no-throw move-constructors
and improves performance.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: <span class="bold"><strong>slist</strong></span>
and <span class="bold"><strong>list</strong></span> containers now have constant-time
<span class="emphasis"><em>size()</em></span> function. The size of the container is added
as a member.
</li>
</ul></div>
</div>
</div>
<div class="section" title="Books and interesting links">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links" title="Books and interesting links">
Books and interesting links</a>
</h3></div></div></div>
<div class="toc"><dl>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_books">
Books</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_links">
Links</a></span></dt>
</dl></div>
<p>
Some useful references about the C++ programming language, C++ internals,
shared memory, allocators and containers used to design <span class="bold"><strong>Boost.Interprocess</strong></span>.
</p>
<div class="section" title="Books">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links.references_books"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_books" title="Books">
Books</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Great book about multithreading, and POSIX: <span class="bold"><strong><span class="emphasis"><em>"Programming
with Posix Threads"</em></span></strong></span>, <span class="bold"><strong>David
R. Butenhof</strong></span>
</li>
<li class="listitem">
The UNIX inter-process bible: <span class="bold"><strong><span class="emphasis"><em>"UNIX
Network Programming, Volume 2: Interprocess Communications"</em></span></strong></span>,
<span class="bold"><strong>W. Richard Stevens</strong></span>
</li>
<li class="listitem">
Current STL allocator issues: <span class="bold"><strong><span class="emphasis"><em>"Effective
STL"</em></span></strong></span>, <span class="bold"><strong>Scott Meyers</strong></span>
</li>
<li class="listitem">
My C++ bible: <span class="bold"><strong><span class="emphasis"><em>"Thinking in C++,
Volume 1 & 2"</em></span></strong></span>, <span class="bold"><strong>Bruce
Eckel and Chuck Allison</strong></span>
</li>
<li class="listitem">
The book every C++ programmer should read: <span class="bold"><strong><span class="emphasis"><em>"Inside
the C++ Object Model"</em></span></strong></span>, <span class="bold"><strong>Stanley
B. Lippman</strong></span>
</li>
<li class="listitem">
A must-read: <span class="bold"><strong><span class="emphasis"><em>"ISO/IEC TR 18015:
Technical Report on C++ Performance"</em></span></strong></span>, <span class="bold"><strong>ISO WG21-SC22 members.</strong></span>
</li>
</ul></div>
</div>
<div class="section" title="Links">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links.references_links"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_links" title="Links">
Links</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
A framework to put the STL in shared memory: <a href="http://allocator.sourceforge.net/" target="_top"><span class="emphasis"><em>"A
C++ Standard Allocator for the Standard Template Library"</em></span>
</a>.
</li>
<li class="listitem">
Instantiating C++ objects in shared memory: <a href="http://www.cs.ubc.ca/local/reading/proceedings/cascon94/htm/english/abs/hon.htm" target="_top"><span class="emphasis"><em>"Using
objects in shared memory for C++ application"</em></span> </a>.
</li>
<li class="listitem">
A shared memory allocator and relative pointer: <a href="http://home.earthlink.net/~joshwalker1/writing/SharedMemory.html" target="_top"><span class="emphasis"><em>"Taming
Shared Memory"</em></span> </a>.
</li>
</ul></div>
</div>
</div>
<div class="section" title="Future improvements...">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements" title="Future improvements...">
Future improvements...</a>
</h3></div></div></div>
<div class="toc"><dl>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.win32_sync">
Win32 synchronization is too basic</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_objectnames">
Use of wide character names on Boost.Interprocess basic resources</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_security">
Security attributes</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_ipc">
Future inter-process communications</a></span></dt>
</dl></div>
<p>
There are some Interprocess features that I would like to implement and some
<span class="bold"><strong>Boost.Interprocess</strong></span> code that can be much
better. Let's see some ideas:
</p>
<div class="section" title="Win32 synchronization is too basic">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.win32_sync"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.win32_sync" title="Win32 synchronization is too basic">
Win32 synchronization is too basic</a>
</h4></div></div></div>
<p>
Win32 version of shared mutexes and shared conditions are based on "spin
and wait" atomic instructions. This leads to poor performance and
does not manage any issues like priority inversions. We would need very
serious help from threading experts on this. And I'm not sure that this
can be achieved in user-level software. Posix based implementations use
PTHREAD_PROCESS_SHARED attribute to place mutexes in shared memory, so
there are no such problems. I'm not aware of any implementation that simulates
PTHREAD_PROCESS_SHARED attribute for Win32. We should be able to construct
these primitives in memory mapped files, so that we can get filesystem
persistence just like with POSIX primitives.
</p>
</div>
<div class="section" title="Use of wide character names on Boost.Interprocess basic resources">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_objectnames"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_objectnames" title="Use of wide character names on Boost.Interprocess basic resources">
Use of wide character names on Boost.Interprocess basic resources</a>
</h4></div></div></div>
<p>
Currently Interprocess only allows <span class="bold"><strong>char</strong></span>
based names for basic named objects. However, several operating systems
use <span class="bold"><strong>wchar_t</strong></span> names for resources (mapped
files, for example). In the future Interprocess should try to present a
portable narrow/wide char interface. To do this, it would be useful to
have a boost wstring <-> string conversion utilities to translate
resource names (escaping needed characters that can conflict with OS names)
in a portable way. It would be interesting also the use of <span class="bold"><strong>boost::filesystem</strong></span>
paths to avoid operating system specific issues.
</p>
</div>
<div class="section" title="Security attributes">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_security"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_security" title="Security attributes">
Security attributes</a>
</h4></div></div></div>
<p>
<span class="bold"><strong>Boost.Interprocess</strong></span> does not define security
attributes for shared memory and synchronization objects. Standard C++
also ignores security attributes with files so adding security attributes
would require some serious work.
</p>
</div>
<div class="section" title="Future inter-process communications">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_ipc"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_ipc" title="Future inter-process communications">
Future inter-process communications</a>
</h4></div></div></div>
<p>
<span class="bold"><strong>Boost.Interprocess</strong></span> offers a process-shared
message queue based on <span class="bold"><strong>Boost.Interprocess</strong></span>
primitives like mutexes and conditions. I would want to develop more mechanisms,
like stream-oriented named fifo so that we can use it with a iostream-interface
wrapper (we can imitate Unix pipes).
</p>
<p>
C++ needs more complex mechanisms and it would be nice to have a stream
and datagram oriented PF_UNIX-like mechanism in C++. And for very fast
inter-process remote calls Solaris doors is an interesting alternative
to implement for C++. But the work to implement PF_UNIX-like sockets and
doors would be huge (and it might be difficult in a user-level library).
Any network expert volunteer?
</p>
</div>
</div>
</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 © 2005 - 2008 Ion Gaztanaga<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>
</div></td>
</tr></table>
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