2 - Added: BronsonAVLTreeMap - Bronson's et al AVL tree implementation
3 - Added: CMake build script, thanks to Eugeny Kalishenko
4 - Changed: SplitList performance improving, thanks to Mike Krinkin
5 - cds::lock namespace is renamed to cds::sync. All classes defined in cds::lock namespace
6 are moved to cds::sync with new names (for example, cds::lock::SpinLock is renamed to
7 cds::sync::spin_lock). cds::lock namespace and its contents is deprecated, it is kept
8 for backward compatibility.
12 - the library has been rewritten to support at least C++11. Compilers: GCC 4.8+, clang 3.3+,
13 MS Visual C++ 12 (2013) Update 4 an above.
14 - Removed: MichaelDeque, reason: the implementation is heavy-weighted, inefficient,
16 - Removed: cds::gc::HRC garbage collector, reason: the implementation is inefficient
18 - Changed: all container's declaration except StripedSet has been unified to the
19 following traits-based form:
20 class Container< GC, T, Traits >
21 - Added: new member function pop_with(Func) to cds::container::TreiberStack
22 - Added: new member functions enqueue_with(Func), dequeue_with(Func) to
23 cds::container::MSQueue
24 cds::container::MoirQueue
25 cds::container::BasketQueue
26 cds::container::OptimisticQueue
27 cds::container::RWQueue
28 cds::container::SegmentedQueue
29 cds::container::TsigasCycleQueue
30 cds::container::VyukovMPMCCycleQueue
31 - Added: new member functions push_with(Func) and pop_with(Func) to cds::container::MSPriorityQueue
32 - SegmentedQueue: add padding into segmented_queue::traits to eliminate false sharing.
33 - Changed: guarded_ptr and exempt_ptr have move semantics now. The container's extract() and get()
34 member functions return the objects of that type.
35 - Changed: improved cds::gc::HP and cds::gc::DHP internal implementation
36 - Changed: map member function insert_key() has been renamed to insert_with()
37 - Changed: cds/cxx11_atomic.h has been renamed to cds/algo/atomic.h
38 - Removed: cds/refcounter.h
42 - Add flat combining (FC) technique and FC-based containers: FCStack, FCQueue,
43 FCDeque, FCPriorityQueue
44 - Add elimination back-off feature to TreiberStack class
45 - Add SegmentedQueue - an unfair queue implementation
46 - New member functions for sets and maps:
47 Functions get() and get_with() search a key and return the pointer to item found
49 Function extract() searches a key, unlinks the item found from the container
50 and returns pointer to item in safe manner.
51 The functions get, get_with, extract, extract_with extract_min, extract_max
52 has been added to the following container:
53 SkipListSet, SkipListMap
54 EllenBinTree, EllenBinTreeSet, EllenBinTreeMap
55 The functions get, get_with, extract, extract_with has been added
56 to the following container:
58 MichaelHashSet, MichaelHashMap
59 SplitListSet, SplitListMap
60 - Fix a serious bug in cds::gc::HRC
61 - Changed MSPriorityQueue to simplify interface and to fix possible pop() deadlock
62 - Fix a bug in BasketQueue
63 - Fix EllenBinTree crash under high contention
64 - Changed: the thread manager detach order to prevent crashing of signal-handled RCU
66 - Changed: cds::gc::HP calls Scan() when a thread is detached.
67 This prevents accumulating retired data.
68 - Changed: minimal boost version is 1.51
69 - Removed: file cds/lock/rwlock.h
73 1. Added: EllenBinTree - an implementation of unbalanced binary search
74 tree based on paper [2010] F.Ellen, P.Fatourou, E.Ruppert, F.van Breugel
75 "Non-blocking Binary Search Tree".
76 2. Added: MSPriorityQueue - an array-based lock-based priority queue heap,
77 see [1996] G.Hunt, M.Michael, S. Parthasarathy, M.Scott "An efficient
78 algorithm for concurrent priority queue heaps"
79 3. Added support for boost.atomic for boost 1.54 and above.
80 Now, libcds supports processor architecture like ARM, PowerPC and any other
81 that are supported by boost.atomic or by C++11 compiler. Any feedbacks are appreciated.
82 To use boost.atomic you should specify -DCDS_USE_BOOST_ATOMIC in compiler's command line.
83 4. Added: a new CDS_USE_LIBCDS_ATOMIC preprocessor flag has been added to direct
84 the compiler to use libcds atomic unconditionally.
85 5. build.sh has been modified to relax processor architecture and OS requirements.
86 This allows to use libcds with native compiler atomic support (or boost.atomic)
87 for a processor architecture that has not been tested by libcds's developers.
88 6. Added support for CLang 3.3
89 7. Added support for MS VC++ 2013
90 8. Added support for Mac OS X, see build/sample/build-osx-clang-libc++.sh,
91 build/sample/build-osx-gcc.sh for example.
92 9. Fixed: SkipListSet::erase_with does not take into account "less" predicate parameter.
93 10.Fixed: some bugs in SkipListSet leading to deadloop
94 11.Fixed: MichaelMap bug: computing hash value for type Q different from key type.
98 1. Added: user-space RCU garbage collector (5 different implementations),
99 see cds::urcu namespace
100 2. Added: RCU-related set/map container specializations
101 3. Added: Skip-list specialization for cds::gc::nogc (undeletable skip-list)
102 4. For set/map classes: find_with and erase_with member functions have been added.
103 These functions allow to use different predicates for searching.
104 5. Added: threading model based on Ñ++11 thread_local keyword (CDS_THREADING_CXX11).
105 At present, only gcc 4.8 supports such model.
106 6. Fixed: bug #11 "ABA bug in libcds 1.3.1 cds/intrusive/msqueue.h"
107 Thanks to Jelle van den Hooff.
108 7. Added support for GCC 4.8
112 - Bug fixed: building libcds with boost versions before 1.48
113 Thanks Lucas Larsch who points me to this problem.
117 1. Added: StripedSet, StripedMap - hash set and hash map
118 implementation based on fine-grained lock-striping technique
119 2. Added: CuckooSet, CuckooMap - implementation of cuckoo hashing algorithm
120 based on fine-grained lock-striping technique
121 3. Added: SkipListSet, SkipListMap - implementation of lock-free skip list
122 4. Added: template <typename... Args> emplace(Args&&... args) member function
123 for all containers in cds::container namespace. This function is available
124 only if the compiler supports new C++11 features - variadic
125 templates and move semantics.
126 5. Changed: lambda functions are used internally instead of wrapping functors.
127 If the compiler does not support C++11 lambdas the old-style wrapping functors are used.
128 6. Changed: test projects has been splitted for optimizing compile time.
129 7. Breaking change: class cds::lock::Auto has been renamed to cds::lock::scoped_lock,
130 class cds::lock::AutoUnlock has been removed
131 8. Added: support for MinGW (tested with TDM-GCC 64bit, gcc 4.7)
133 1.2.0 20.08.2012 (beta)
135 1. Added: MichaelDeque - deque lock-free algo discovered by Maged Michael
136 2. Added: BasketQueue - Michael's queue modification discovered by Nir Shavit et al.
137 3. Added: support of Clang 3.0, 3.1 compiler (tested on Linux with boost 1.49)
138 4. Fixed: solving problem of 8-byte atomic data alignment on 32-bit platforms
139 5. Fixed bug 3536393: OptimisticQueue core dump
141 1.1.0 17.04.2012 (beta)
143 1. Added: C++11 atomic operations support. The library has been rewritten
144 for using std::atomic class and operations proposed in C++11 Standard.
145 If the compiler does not support the standard <atomic> library,
146 own partial implementation declared in cds/cxx11_atomic.h is used.
147 cxx11_atomic.h contains implementation for lock-free part of C++11
148 <atomic> header needed for libcds.
149 2. Added: support for C++11 feature (if applicable):
150 - inline namespace (for GCC 4.4+)
151 - function =default and =delete specifiers (for GCC 4.4+)
152 3. Changed: the main reclamation cycle ("liberate" function) of cds::gc::PTB
153 memory reclamation schema has been optimized. Previous implementation
154 could lead to unbounded memory consumption under high contention.
155 4. Changed: the internal structure of cds::intrusive::OptimisticQueue is greatly simplified.
156 The interface of the class is slightly changed.
157 5. Fixed: some problem with cds::gc::HRC memory reclamation schema that
158 could be the cause of occasional program crash.
159 6. Fixed: an error in node reclamation algo in queue implementation (MSQueue, MoirQueue,
160 OptimisticQueue). As an result of the error, some items could be lost with memory leaks.
161 7. Changed: cds::concept namespace and its content has been removed
162 8. Added support for Microsoft Visual C++ 11 Beta
163 9. Added support for GCC 4.7
165 1.0.0 31.12.2011 (beta)
166 This version is completely rewritten to support intrusive version of lock-free containers
167 and more lightweight garbage collectors interface.
168 The class hierarchy and interfaces have been completely reimplemented from scratch.
170 1. Added: intrusive containers. Many lock-free containers in libcds have the intrusive
171 counterparts. The library is fully refactored to support intrusive containers.
172 Class hierarchy is changed: almost all non-intrusive container classes are based
173 on their intrusive versions.
174 Two new namespace is added:
175 cds::intrusive - for intrusive containers
176 cds::container - for non-intrusive containers
177 Namespaces by container type (cds::queue, cds::map and so on) have been removed.
178 2. Added: New option-based approach is used for class declaration instead
179 old traits-based one. This approach allows to declare template arguments
180 in position-independent manner that is very useful for complex template declarations.
181 Option-based declarations use C++0x variadic templates if compiler supports it (GCC),
182 otherwise (MS VC) an emulation is used.
183 3. Changed: garbage collectors interface is generalized. cds::gc::GC (where GC is
184 one of HP, HRC, PTB) classes has been added.
185 4. Removed: tagged pointer GC. This GC
186 - unsafe for complex data structure
187 - x86-specific since it requires double-width CAS primitive
188 - memory-consuming since it requires separate free-list for each type stored in the containers
189 5. Default threading model is changed (see doc for cds::threading namespace):
190 - for Windows and MSVC++, CDS_THREADING_WIN_TLS is the default now
191 - for *nix and GCC, CDS_THREADING_PTHREAD is the default now
192 6. Added GCC 4.6 support (constexpr)
193 7. Added Microsoft Visual Studio 2010 (vc10) solution
195 0.8.0 28.03.2011 (beta)
196 1. Added: cds::Initialize and cds::Terminate functions that initializes and frees library's
198 2. Added: cds::memory::michael::Heap - Michael's lock-free allocator
199 3. Added: Exponential back-off strategy for spinning
200 4. Added: cds::queue::vyukov_mpmc_bounded - bounded queue
201 developed by Dmitry Vyukov (http://www.1024cores.net)
202 5. Added: support for FreeBSD amd64, x86
204 0.7.2 27.02.2011 (beta)
205 1. [Bug 3157201] Added implementation of threading manager based on Windows TLS API, see
206 cds::threading::wintls::Manager. Added CDS_THREADING_WIN_TLS macro. See docs for
207 cds::threading namespace for details.
208 2. Fixed bug in cds::threading::pthread::Manager: ptb_gc has not been initialized properly.
210 template <typename T, typename FUNC>
211 bool erase( const key_type& key, T& dest, FUNC func ) ;
212 has been added to all map classes.
214 template <typename T, typename FUNC>
215 bool insert( const key_type& key, T& val, FUNC func ) ;
216 has been added to all map classes.
217 5. Added new argument "bNew" to functor "func" of map's "ensure" member function:
218 void func( VALUE& itemValue, const VALUE& val, bool bNew ) ;
219 bNew = true if new item has been added
220 bNew = false if key is found
221 6. Fixed bug in cds::map::SplitOrderedList: LSB of dummy node's hash should be zero
222 7. Changed: thread liveliness checking on *nix has been changed to pthread_kill(id, 0).
223 8. Fixed: in map template member functions the functor may be passed by value
224 or by reference; use boost::ref( yourFunctor ) to pass your functor by reference
225 9. Fixed: cds::gc::tagged GC and all classes based on this GC has been rewritten
226 to solve stability problems.
228 0.7.1 30.12.2010 (beta)
229 1. [Bug 3130852] cds::queue::TZCyclicQueue::empty() has been corrected
230 2. [Bug 3128161] It seems, GCC 4.4 has a bug in __thread on x86 and x86_64. New "threading model"
231 CDS_THREADING_AUTODETECT has been added. See docs of cds::threading namespace for details
232 3. Fixed errors in the "Pass-the-Buck" garbage collector (namespace cds::gc::ptb)
233 4. [Bug 3128148] The code is aligned with the C++ standard (minor violations has been removed)
234 5. [Bug 3141654] missing break statement for atomic store - fixed
235 6. Added in-place scan strategy to cds::gc::hzp::GarbageCollector that does not allocate any memory.
236 7. Fixed bugs in HRC and tagged GC
238 0.7.0 05.12.2010 (beta)
239 1. Preliminary support for "Pass The Buck" memory manager is added. See cds::gc::ptb namespace.
240 2. Many part of library is rewritten to generalize the usage of various GCs
241 3. The new class cds::details::aligned_allocator has been added for allocating aligned memory
242 blocks. It is useful for Tagged Pointer memory reclamation schema (cds::gc::tagged_gc).
243 4. [Break change] New argument has been added to the member functions "ensure" and "find"
244 for ordered list and map classes
245 5. New member function "emplace" has been added to ordered list and map classes. This member function
246 allows change the value (or a part of it) of list/map item.
247 6. The internal structure of class cds::map::MichaelHashMap is completely refactored to support
248 cds::gc::no_gc correctly
249 7. The classes RecursiveSpinT, RecursiveSpin32, RecursiveSpin64, and RecursiveSpin from cds::lock
250 namespace have been renamed to ReentrantSpinT, ReentrantSpin32, ReentrantSpin64, and ReentrantSpin
252 8. Compiler support: GCC version below 4.3.0 is not supported
253 9. Fixed memory leak in cds::map::SplitOrderedList
254 10. Added compiler barrier to spin-lock release primitive for x86 and amd64
255 11. Makefile script is changed to resolve the problem when an user calls 'make clean' directly.
256 Thanks to Tamas Lengyel to point me to this bug.
257 12. The file dictionary.txt is excluded from distributive. This file is used for testing purposes only.
258 You may create dictionary.txt in this way:
262 0.6.0 26.03.2010 (beta)
263 1. The library is rewritten using atomic primitives with explicit memory ordering (based on C++
264 memory model proposal). The implementation of atomic primitives for supported architectures
265 is developed from scratch.
268 0.5.0 31.12.2009 (beta)