3 - switch to C++11 standard
4 - Removed: MichaelDeque, reason: the implementation is heavy-weighted, inefficient,
6 - Added: cds::container::TreiberStack::pop_with(Func)
7 - Added: member functions enqueue_with(Func), dequeue_with(Func) to
8 cds::container::MSQueue
9 cds::container::MoirQueue
10 cds::container::BasketQueue
11 cds::container::OptimisticQueue
12 cds::container::RWQueue
13 cds::container::SegmentedQueue
17 - Add flat combining (FC) technique and FC-based containers: FCStack, FCQueue,
18 FCDeque, FCPriorityQueue
19 - Add elimination back-off feature to TreiberStack class
20 - Add SegmentedQueue - an unfair queue implementation
21 - New member functions for sets and maps:
22 Functions get() and get_with() search a key and return the pointer to item found
24 Function extract() searches a key, unlinks the item found from the container
25 and returns pointer to item in safe manner.
26 The functions get, get_with, extract, extract_with extract_min, extract_max
27 has been added to the following container:
28 SkipListSet, SkipListMap
29 EllenBinTree, EllenBinTreeSet, EllenBinTreeMap
30 The functions get, get_with, extract, extract_with has been added
31 to the following container:
33 MichaelHashSet, MichaelHashMap
34 SplitListSet, SplitListMap
35 - Fix a serious bug in cds::gc::HRC
36 - Changed MSPriorityQueue to simplify interface and to fix possible pop() deadlock
37 - Fix a bug in BasketQueue
38 - Fix EllenBinTree crash under high contention
39 - Changed: the thread manager detach order to prevent crashing of signal-handled RCU
41 - Changed: cds::gc::HP calls Scan() when a thread is detached.
42 This prevents accumulating retired data.
43 - Changed: minimal boost version is 1.51
44 - Removed: file cds/lock/rwlock.h
48 1. Added: EllenBinTree - an implementation of unbalanced binary search
49 tree based on paper [2010] F.Ellen, P.Fatourou, E.Ruppert, F.van Breugel
50 "Non-blocking Binary Search Tree".
51 2. Added: MSPriorityQueue - an array-based lock-based priority queue heap,
52 see [1996] G.Hunt, M.Michael, S. Parthasarathy, M.Scott "An efficient
53 algorithm for concurrent priority queue heaps"
54 3. Added support for boost.atomic for boost 1.54 and above.
55 Now, libcds supports processor architecture like ARM, PowerPC and any other
56 that are supported by boost.atomic or by C++11 compiler. Any feedbacks are appreciated.
57 To use boost.atomic you should specify -DCDS_USE_BOOST_ATOMIC in compiler's command line.
58 4. Added: a new CDS_USE_LIBCDS_ATOMIC preprocessor flag has been added to direct
59 the compiler to use libcds atomic unconditionally.
60 5. build.sh has been modified to relax processor architecture and OS requirements.
61 This allows to use libcds with native compiler atomic support (or boost.atomic)
62 for a processor architecture that has not been tested by libcds's developers.
63 6. Added support for CLang 3.3
64 7. Added support for MS VC++ 2013
65 8. Added support for Mac OS X, see build/sample/build-osx-clang-libc++.sh,
66 build/sample/build-osx-gcc.sh for example.
67 9. Fixed: SkipListSet::erase_with does not take into account "less" predicate parameter.
68 10.Fixed: some bugs in SkipListSet leading to deadloop
69 11.Fixed: MichaelMap bug: computing hash value for type Q different from key type.
73 1. Added: user-space RCU garbage collector (5 different implementations),
74 see cds::urcu namespace
75 2. Added: RCU-related set/map container specializations
76 3. Added: Skip-list specialization for cds::gc::nogc (undeletable skip-list)
77 4. For set/map classes: find_with and erase_with member functions have been added.
78 These functions allow to use different predicates for searching.
79 5. Added: threading model based on Ñ++11 thread_local keyword (CDS_THREADING_CXX11).
80 At present, only gcc 4.8 supports such model.
81 6. Fixed: bug #11 "ABA bug in libcds 1.3.1 cds/intrusive/msqueue.h"
82 Thanks to Jelle van den Hooff.
83 7. Added support for GCC 4.8
87 - Bug fixed: building libcds with boost versions before 1.48
88 Thanks Lucas Larsch who points me to this problem.
92 1. Added: StripedSet, StripedMap - hash set and hash map
93 implementation based on fine-grained lock-striping technique
94 2. Added: CuckooSet, CuckooMap - implementation of cuckoo hashing algorithm
95 based on fine-grained lock-striping technique
96 3. Added: SkipListSet, SkipListMap - implementation of lock-free skip list
97 4. Added: template <typename... Args> emplace(Args&&... args) member function
98 for all containers in cds::container namespace. This function is available
99 only if the compiler supports new C++11 features - variadic
100 templates and move semantics.
101 5. Changed: lambda functions are used internally instead of wrapping functors.
102 If the compiler does not support C++11 lambdas the old-style wrapping functors are used.
103 6. Changed: test projects has been splitted for optimizing compile time.
104 7. Breaking change: class cds::lock::Auto has been renamed to cds::lock::scoped_lock,
105 class cds::lock::AutoUnlock has been removed
106 8. Added: support for MinGW (tested with TDM-GCC 64bit, gcc 4.7)
108 1.2.0 20.08.2012 (beta)
110 1. Added: MichaelDeque - deque lock-free algo discovered by Maged Michael
111 2. Added: BasketQueue - Michael's queue modification discovered by Nir Shavit et al.
112 3. Added: support of Clang 3.0, 3.1 compiler (tested on Linux with boost 1.49)
113 4. Fixed: solving problem of 8-byte atomic data alignment on 32-bit platforms
114 5. Fixed bug 3536393: OptimisticQueue core dump
116 1.1.0 17.04.2012 (beta)
118 1. Added: C++11 atomic operations support. The library has been rewritten
119 for using std::atomic class and operations proposed in C++11 Standard.
120 If the compiler does not support the standard <atomic> library,
121 own partial implementation declared in cds/cxx11_atomic.h is used.
122 cxx11_atomic.h contains implementation for lock-free part of C++11
123 <atomic> header needed for libcds.
124 2. Added: support for C++11 feature (if applicable):
125 - inline namespace (for GCC 4.4+)
126 - function =default and =delete specifiers (for GCC 4.4+)
127 3. Changed: the main reclamation cycle ("liberate" function) of cds::gc::PTB
128 memory reclamation schema has been optimized. Previous implementation
129 could lead to unbounded memory consumption under high contention.
130 4. Changed: the internal structure of cds::intrusive::OptimisticQueue is greatly simplified.
131 The interface of the class is slightly changed.
132 5. Fixed: some problem with cds::gc::HRC memory reclamation schema that
133 could be the cause of occasional program crash.
134 6. Fixed: an error in node reclamation algo in queue implementation (MSQueue, MoirQueue,
135 OptimisticQueue). As an result of the error, some items could be lost with memory leaks.
136 7. Changed: cds::concept namespace and its content has been removed
137 8. Added support for Microsoft Visual C++ 11 Beta
138 9. Added support for GCC 4.7
140 1.0.0 31.12.2011 (beta)
141 This version is completely rewritten to support intrusive version of lock-free containers
142 and more lightweight garbage collectors interface.
143 The class hierarchy and interfaces have been completely reimplemented from scratch.
145 1. Added: intrusive containers. Many lock-free containers in libcds have the intrusive
146 counterparts. The library is fully refactored to support intrusive containers.
147 Class hierarchy is changed: almost all non-intrusive container classes are based
148 on their intrusive versions.
149 Two new namespace is added:
150 cds::intrusive - for intrusive containers
151 cds::container - for non-intrusive containers
152 Namespaces by container type (cds::queue, cds::map and so on) have been removed.
153 2. Added: New option-based approach is used for class declaration instead
154 old traits-based one. This approach allows to declare template arguments
155 in position-independent manner that is very useful for complex template declarations.
156 Option-based declarations use C++0x variadic templates if compiler supports it (GCC),
157 otherwise (MS VC) an emulation is used.
158 3. Changed: garbage collectors interface is generalized. cds::gc::GC (where GC is
159 one of HP, HRC, PTB) classes has been added.
160 4. Removed: tagged pointer GC. This GC
161 - unsafe for complex data structure
162 - x86-specific since it requires double-width CAS primitive
163 - memory-consuming since it requires separate free-list for each type stored in the containers
164 5. Default threading model is changed (see doc for cds::threading namespace):
165 - for Windows and MSVC++, CDS_THREADING_WIN_TLS is the default now
166 - for *nix and GCC, CDS_THREADING_PTHREAD is the default now
167 6. Added GCC 4.6 support (constexpr)
168 7. Added Microsoft Visual Studio 2010 (vc10) solution
170 0.8.0 28.03.2011 (beta)
171 1. Added: cds::Initialize and cds::Terminate functions that initializes and frees library's
173 2. Added: cds::memory::michael::Heap - Michael's lock-free allocator
174 3. Added: Exponential back-off strategy for spinning
175 4. Added: cds::queue::vyukov_mpmc_bounded - bounded queue
176 developed by Dmitry Vyukov (http://www.1024cores.net)
177 5. Added: support for FreeBSD amd64, x86
179 0.7.2 27.02.2011 (beta)
180 1. [Bug 3157201] Added implementation of threading manager based on Windows TLS API, see
181 cds::threading::wintls::Manager. Added CDS_THREADING_WIN_TLS macro. See docs for
182 cds::threading namespace for details.
183 2. Fixed bug in cds::threading::pthread::Manager: ptb_gc has not been initialized properly.
185 template <typename T, typename FUNC>
186 bool erase( const key_type& key, T& dest, FUNC func ) ;
187 has been added to all map classes.
189 template <typename T, typename FUNC>
190 bool insert( const key_type& key, T& val, FUNC func ) ;
191 has been added to all map classes.
192 5. Added new argument "bNew" to functor "func" of map's "ensure" member function:
193 void func( VALUE& itemValue, const VALUE& val, bool bNew ) ;
194 bNew = true if new item has been added
195 bNew = false if key is found
196 6. Fixed bug in cds::map::SplitOrderedList: LSB of dummy node's hash should be zero
197 7. Changed: thread liveliness checking on *nix has been changed to pthread_kill(id, 0).
198 8. Fixed: in map template member functions the functor may be passed by value
199 or by reference; use boost::ref( yourFunctor ) to pass your functor by reference
200 9. Fixed: cds::gc::tagged GC and all classes based on this GC has been rewritten
201 to solve stability problems.
203 0.7.1 30.12.2010 (beta)
204 1. [Bug 3130852] cds::queue::TZCyclicQueue::empty() has been corrected
205 2. [Bug 3128161] It seems, GCC 4.4 has a bug in __thread on x86 and x86_64. New "threading model"
206 CDS_THREADING_AUTODETECT has been added. See docs of cds::threading namespace for details
207 3. Fixed errors in the "Pass-the-Buck" garbage collector (namespace cds::gc::ptb)
208 4. [Bug 3128148] The code is aligned with the C++ standard (minor violations has been removed)
209 5. [Bug 3141654] missing break statement for atomic store - fixed
210 6. Added in-place scan strategy to cds::gc::hzp::GarbageCollector that does not allocate any memory.
211 7. Fixed bugs in HRC and tagged GC
213 0.7.0 05.12.2010 (beta)
214 1. Preliminary support for "Pass The Buck" memory manager is added. See cds::gc::ptb namespace.
215 2. Many part of library is rewritten to generalize the usage of various GCs
216 3. The new class cds::details::aligned_allocator has been added for allocating aligned memory
217 blocks. It is useful for Tagged Pointer memory reclamation schema (cds::gc::tagged_gc).
218 4. [Break change] New argument has been added to the member functions "ensure" and "find"
219 for ordered list and map classes
220 5. New member function "emplace" has been added to ordered list and map classes. This member function
221 allows change the value (or a part of it) of list/map item.
222 6. The internal structure of class cds::map::MichaelHashMap is completely refactored to support
223 cds::gc::no_gc correctly
224 7. The classes RecursiveSpinT, RecursiveSpin32, RecursiveSpin64, and RecursiveSpin from cds::lock
225 namespace have been renamed to ReentrantSpinT, ReentrantSpin32, ReentrantSpin64, and ReentrantSpin
227 8. Compiler support: GCC version below 4.3.0 is not supported
228 9. Fixed memory leak in cds::map::SplitOrderedList
229 10. Added compiler barrier to spin-lock release primitive for x86 and amd64
230 11. Makefile script is changed to resolve the problem when an user calls 'make clean' directly.
231 Thanks to Tamas Lengyel to point me to this bug.
232 12. The file dictionary.txt is exluded from distributive. This file is used for testing purposes only.
233 You may create dictionary.txt in this way:
237 0.6.0 26.03.2010 (beta)
238 1. The library is rewritten using atomic primitives with explicit memory ordering (based on C++
239 memory model proposal). The implementation of atomic primitives for supported architectures
240 is developed from scratch.
243 0.5.0 31.12.2009 (beta)