2 - Added: FeldmanHashSet/Map - an interesting hash map algorithm
3 based on multi-level array, requires perfect hashing or fixed-sized keys.
4 Supports thread-safe bidirectional iterators.
5 - Added: BronsonAVLTreeMap - Bronson's et al AVL tree implementation
6 - Added: CMake build script, thanks to Eugeny Kalishenko
7 - Changed: SplitList performance improving, thanks to Mike Krinkin
8 - Changed: semantic of member functions extract(), get() and its
9 variants for MichaelList RCU-based specialization: extract() does not
10 require RCU locking, get() now returns special wrapper object of type raw_ptr,
12 Thus, semantics of extract()/get() of all RCU-based set and maps based on
13 MichaelList (MichaelSet/Map, SplitListSet/Map) has been changed too.
14 - Changed: SplitListSet/Map functions get() and get_with() return special wrapper
15 object of type raw_ptr, see doc.
16 - Removed: SplitListSet/Map force_dispose() function.
17 - cds::lock namespace is renamed to cds::sync. All classes defined in cds::lock namespace
18 are moved to cds::sync with new names (for example, cds::lock::SpinLock is renamed to
19 cds::sync::spin_lock). cds::lock namespace and its contents is deprecated, it is kept
20 for backward compatibility.
24 - the library has been rewritten to support at least C++11. Compilers: GCC 4.8+, clang 3.3+,
25 MS Visual C++ 12 (2013) Update 4 an above.
26 - Removed: MichaelDeque, reason: the implementation is heavy-weighted, inefficient,
28 - Removed: cds::gc::HRC garbage collector, reason: the implementation is inefficient
30 - Changed: all container's declaration except StripedSet has been unified to the
31 following traits-based form:
32 class Container< GC, T, Traits >
33 - Added: new member function pop_with(Func) to cds::container::TreiberStack
34 - Added: new member functions enqueue_with(Func), dequeue_with(Func) to
35 cds::container::MSQueue
36 cds::container::MoirQueue
37 cds::container::BasketQueue
38 cds::container::OptimisticQueue
39 cds::container::RWQueue
40 cds::container::SegmentedQueue
41 cds::container::TsigasCycleQueue
42 cds::container::VyukovMPMCCycleQueue
43 - Added: new member functions push_with(Func) and pop_with(Func) to cds::container::MSPriorityQueue
44 - SegmentedQueue: add padding into segmented_queue::traits to eliminate false sharing.
45 - Changed: guarded_ptr and exempt_ptr have move semantics now. The container's extract() and get()
46 member functions return the objects of that type.
47 - Changed: improved cds::gc::HP and cds::gc::DHP internal implementation
48 - Changed: map member function insert_key() has been renamed to insert_with()
49 - Changed: cds/cxx11_atomic.h has been renamed to cds/algo/atomic.h
50 - Removed: cds/refcounter.h
54 - Add flat combining (FC) technique and FC-based containers: FCStack, FCQueue,
55 FCDeque, FCPriorityQueue
56 - Add elimination back-off feature to TreiberStack class
57 - Add SegmentedQueue - an unfair queue implementation
58 - New member functions for sets and maps:
59 Functions get() and get_with() search a key and return the pointer to item found
61 Function extract() searches a key, unlinks the item found from the container
62 and returns pointer to item in safe manner.
63 The functions get, get_with, extract, extract_with extract_min, extract_max
64 has been added to the following container:
65 SkipListSet, SkipListMap
66 EllenBinTree, EllenBinTreeSet, EllenBinTreeMap
67 The functions get, get_with, extract, extract_with has been added
68 to the following container:
70 MichaelHashSet, MichaelHashMap
71 SplitListSet, SplitListMap
72 - Fix a serious bug in cds::gc::HRC
73 - Changed MSPriorityQueue to simplify interface and to fix possible pop() deadlock
74 - Fix a bug in BasketQueue
75 - Fix EllenBinTree crash under high contention
76 - Changed: the thread manager detach order to prevent crashing of signal-handled RCU
78 - Changed: cds::gc::HP calls Scan() when a thread is detached.
79 This prevents accumulating retired data.
80 - Changed: minimal boost version is 1.51
81 - Removed: file cds/lock/rwlock.h
85 1. Added: EllenBinTree - an implementation of unbalanced binary search
86 tree based on paper [2010] F.Ellen, P.Fatourou, E.Ruppert, F.van Breugel
87 "Non-blocking Binary Search Tree".
88 2. Added: MSPriorityQueue - an array-based lock-based priority queue heap,
89 see [1996] G.Hunt, M.Michael, S. Parthasarathy, M.Scott "An efficient
90 algorithm for concurrent priority queue heaps"
91 3. Added support for boost.atomic for boost 1.54 and above.
92 Now, libcds supports processor architecture like ARM, PowerPC and any other
93 that are supported by boost.atomic or by C++11 compiler. Any feedbacks are appreciated.
94 To use boost.atomic you should specify -DCDS_USE_BOOST_ATOMIC in compiler's command line.
95 4. Added: a new CDS_USE_LIBCDS_ATOMIC preprocessor flag has been added to direct
96 the compiler to use libcds atomic unconditionally.
97 5. build.sh has been modified to relax processor architecture and OS requirements.
98 This allows to use libcds with native compiler atomic support (or boost.atomic)
99 for a processor architecture that has not been tested by libcds's developers.
100 6. Added support for CLang 3.3
101 7. Added support for MS VC++ 2013
102 8. Added support for Mac OS X, see build/sample/build-osx-clang-libc++.sh,
103 build/sample/build-osx-gcc.sh for example.
104 9. Fixed: SkipListSet::erase_with does not take into account "less" predicate parameter.
105 10.Fixed: some bugs in SkipListSet leading to deadloop
106 11.Fixed: MichaelMap bug: computing hash value for type Q different from key type.
110 1. Added: user-space RCU garbage collector (5 different implementations),
111 see cds::urcu namespace
112 2. Added: RCU-related set/map container specializations
113 3. Added: Skip-list specialization for cds::gc::nogc (undeletable skip-list)
114 4. For set/map classes: find_with and erase_with member functions have been added.
115 These functions allow to use different predicates for searching.
116 5. Added: threading model based on Ñ++11 thread_local keyword (CDS_THREADING_CXX11).
117 At present, only gcc 4.8 supports such model.
118 6. Fixed: bug #11 "ABA bug in libcds 1.3.1 cds/intrusive/msqueue.h"
119 Thanks to Jelle van den Hooff.
120 7. Added support for GCC 4.8
124 - Bug fixed: building libcds with boost versions before 1.48
125 Thanks Lucas Larsch who points me to this problem.
129 1. Added: StripedSet, StripedMap - hash set and hash map
130 implementation based on fine-grained lock-striping technique
131 2. Added: CuckooSet, CuckooMap - implementation of cuckoo hashing algorithm
132 based on fine-grained lock-striping technique
133 3. Added: SkipListSet, SkipListMap - implementation of lock-free skip list
134 4. Added: template <typename... Args> emplace(Args&&... args) member function
135 for all containers in cds::container namespace. This function is available
136 only if the compiler supports new C++11 features - variadic
137 templates and move semantics.
138 5. Changed: lambda functions are used internally instead of wrapping functors.
139 If the compiler does not support C++11 lambdas the old-style wrapping functors are used.
140 6. Changed: test projects has been splitted for optimizing compile time.
141 7. Breaking change: class cds::lock::Auto has been renamed to cds::lock::scoped_lock,
142 class cds::lock::AutoUnlock has been removed
143 8. Added: support for MinGW (tested with TDM-GCC 64bit, gcc 4.7)
145 1.2.0 20.08.2012 (beta)
147 1. Added: MichaelDeque - deque lock-free algo discovered by Maged Michael
148 2. Added: BasketQueue - Michael's queue modification discovered by Nir Shavit et al.
149 3. Added: support of Clang 3.0, 3.1 compiler (tested on Linux with boost 1.49)
150 4. Fixed: solving problem of 8-byte atomic data alignment on 32-bit platforms
151 5. Fixed bug 3536393: OptimisticQueue core dump
153 1.1.0 17.04.2012 (beta)
155 1. Added: C++11 atomic operations support. The library has been rewritten
156 for using std::atomic class and operations proposed in C++11 Standard.
157 If the compiler does not support the standard <atomic> library,
158 own partial implementation declared in cds/cxx11_atomic.h is used.
159 cxx11_atomic.h contains implementation for lock-free part of C++11
160 <atomic> header needed for libcds.
161 2. Added: support for C++11 feature (if applicable):
162 - inline namespace (for GCC 4.4+)
163 - function =default and =delete specifiers (for GCC 4.4+)
164 3. Changed: the main reclamation cycle ("liberate" function) of cds::gc::PTB
165 memory reclamation schema has been optimized. Previous implementation
166 could lead to unbounded memory consumption under high contention.
167 4. Changed: the internal structure of cds::intrusive::OptimisticQueue is greatly simplified.
168 The interface of the class is slightly changed.
169 5. Fixed: some problem with cds::gc::HRC memory reclamation schema that
170 could be the cause of occasional program crash.
171 6. Fixed: an error in node reclamation algo in queue implementation (MSQueue, MoirQueue,
172 OptimisticQueue). As an result of the error, some items could be lost with memory leaks.
173 7. Changed: cds::concept namespace and its content has been removed
174 8. Added support for Microsoft Visual C++ 11 Beta
175 9. Added support for GCC 4.7
177 1.0.0 31.12.2011 (beta)
178 This version is completely rewritten to support intrusive version of lock-free containers
179 and more lightweight garbage collectors interface.
180 The class hierarchy and interfaces have been completely reimplemented from scratch.
182 1. Added: intrusive containers. Many lock-free containers in libcds have the intrusive
183 counterparts. The library is fully refactored to support intrusive containers.
184 Class hierarchy is changed: almost all non-intrusive container classes are based
185 on their intrusive versions.
186 Two new namespace is added:
187 cds::intrusive - for intrusive containers
188 cds::container - for non-intrusive containers
189 Namespaces by container type (cds::queue, cds::map and so on) have been removed.
190 2. Added: New option-based approach is used for class declaration instead
191 old traits-based one. This approach allows to declare template arguments
192 in position-independent manner that is very useful for complex template declarations.
193 Option-based declarations use C++0x variadic templates if compiler supports it (GCC),
194 otherwise (MS VC) an emulation is used.
195 3. Changed: garbage collectors interface is generalized. cds::gc::GC (where GC is
196 one of HP, HRC, PTB) classes has been added.
197 4. Removed: tagged pointer GC. This GC
198 - unsafe for complex data structure
199 - x86-specific since it requires double-width CAS primitive
200 - memory-consuming since it requires separate free-list for each type stored in the containers
201 5. Default threading model is changed (see doc for cds::threading namespace):
202 - for Windows and MSVC++, CDS_THREADING_WIN_TLS is the default now
203 - for *nix and GCC, CDS_THREADING_PTHREAD is the default now
204 6. Added GCC 4.6 support (constexpr)
205 7. Added Microsoft Visual Studio 2010 (vc10) solution
207 0.8.0 28.03.2011 (beta)
208 1. Added: cds::Initialize and cds::Terminate functions that initializes and frees library's
210 2. Added: cds::memory::michael::Heap - Michael's lock-free allocator
211 3. Added: Exponential back-off strategy for spinning
212 4. Added: cds::queue::vyukov_mpmc_bounded - bounded queue
213 developed by Dmitry Vyukov (http://www.1024cores.net)
214 5. Added: support for FreeBSD amd64, x86
216 0.7.2 27.02.2011 (beta)
217 1. [Bug 3157201] Added implementation of threading manager based on Windows TLS API, see
218 cds::threading::wintls::Manager. Added CDS_THREADING_WIN_TLS macro. See docs for
219 cds::threading namespace for details.
220 2. Fixed bug in cds::threading::pthread::Manager: ptb_gc has not been initialized properly.
222 template <typename T, typename FUNC>
223 bool erase( const key_type& key, T& dest, FUNC func ) ;
224 has been added to all map classes.
226 template <typename T, typename FUNC>
227 bool insert( const key_type& key, T& val, FUNC func ) ;
228 has been added to all map classes.
229 5. Added new argument "bNew" to functor "func" of map's "ensure" member function:
230 void func( VALUE& itemValue, const VALUE& val, bool bNew ) ;
231 bNew = true if new item has been added
232 bNew = false if key is found
233 6. Fixed bug in cds::map::SplitOrderedList: LSB of dummy node's hash should be zero
234 7. Changed: thread liveliness checking on *nix has been changed to pthread_kill(id, 0).
235 8. Fixed: in map template member functions the functor may be passed by value
236 or by reference; use boost::ref( yourFunctor ) to pass your functor by reference
237 9. Fixed: cds::gc::tagged GC and all classes based on this GC has been rewritten
238 to solve stability problems.
240 0.7.1 30.12.2010 (beta)
241 1. [Bug 3130852] cds::queue::TZCyclicQueue::empty() has been corrected
242 2. [Bug 3128161] It seems, GCC 4.4 has a bug in __thread on x86 and x86_64. New "threading model"
243 CDS_THREADING_AUTODETECT has been added. See docs of cds::threading namespace for details
244 3. Fixed errors in the "Pass-the-Buck" garbage collector (namespace cds::gc::ptb)
245 4. [Bug 3128148] The code is aligned with the C++ standard (minor violations has been removed)
246 5. [Bug 3141654] missing break statement for atomic store - fixed
247 6. Added in-place scan strategy to cds::gc::hzp::GarbageCollector that does not allocate any memory.
248 7. Fixed bugs in HRC and tagged GC
250 0.7.0 05.12.2010 (beta)
251 1. Preliminary support for "Pass The Buck" memory manager is added. See cds::gc::ptb namespace.
252 2. Many part of library is rewritten to generalize the usage of various GCs
253 3. The new class cds::details::aligned_allocator has been added for allocating aligned memory
254 blocks. It is useful for Tagged Pointer memory reclamation schema (cds::gc::tagged_gc).
255 4. [Break change] New argument has been added to the member functions "ensure" and "find"
256 for ordered list and map classes
257 5. New member function "emplace" has been added to ordered list and map classes. This member function
258 allows change the value (or a part of it) of list/map item.
259 6. The internal structure of class cds::map::MichaelHashMap is completely refactored to support
260 cds::gc::no_gc correctly
261 7. The classes RecursiveSpinT, RecursiveSpin32, RecursiveSpin64, and RecursiveSpin from cds::lock
262 namespace have been renamed to ReentrantSpinT, ReentrantSpin32, ReentrantSpin64, and ReentrantSpin
264 8. Compiler support: GCC version below 4.3.0 is not supported
265 9. Fixed memory leak in cds::map::SplitOrderedList
266 10. Added compiler barrier to spin-lock release primitive for x86 and amd64
267 11. Makefile script is changed to resolve the problem when an user calls 'make clean' directly.
268 Thanks to Tamas Lengyel to point me to this bug.
269 12. The file dictionary.txt is excluded from distributive. This file is used for testing purposes only.
270 You may create dictionary.txt in this way:
274 0.6.0 26.03.2010 (beta)
275 1. The library is rewritten using atomic primitives with explicit memory ordering (based on C++
276 memory model proposal). The implementation of atomic primitives for supported architectures
277 is developed from scratch.
280 0.5.0 31.12.2009 (beta)