3 - switch to C++11 standard
4 - Removed: MichaelDeque, reason: the implementation is heavy-weighted, inefficient,
6 - Added: new member function pop_with(Func) to cds::container::TreiberStack
7 - Added: new 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
14 cds::container::TsigasCycleQueue
15 cds::container::VyukovMPMCCycleQueue
16 - Added: new member functions push_with(Func) and pop_with(Func) to cds::container::MSPriorityQueue
20 - Add flat combining (FC) technique and FC-based containers: FCStack, FCQueue,
21 FCDeque, FCPriorityQueue
22 - Add elimination back-off feature to TreiberStack class
23 - Add SegmentedQueue - an unfair queue implementation
24 - New member functions for sets and maps:
25 Functions get() and get_with() search a key and return the pointer to item found
27 Function extract() searches a key, unlinks the item found from the container
28 and returns pointer to item in safe manner.
29 The functions get, get_with, extract, extract_with extract_min, extract_max
30 has been added to the following container:
31 SkipListSet, SkipListMap
32 EllenBinTree, EllenBinTreeSet, EllenBinTreeMap
33 The functions get, get_with, extract, extract_with has been added
34 to the following container:
36 MichaelHashSet, MichaelHashMap
37 SplitListSet, SplitListMap
38 - Fix a serious bug in cds::gc::HRC
39 - Changed MSPriorityQueue to simplify interface and to fix possible pop() deadlock
40 - Fix a bug in BasketQueue
41 - Fix EllenBinTree crash under high contention
42 - Changed: the thread manager detach order to prevent crashing of signal-handled RCU
44 - Changed: cds::gc::HP calls Scan() when a thread is detached.
45 This prevents accumulating retired data.
46 - Changed: minimal boost version is 1.51
47 - Removed: file cds/lock/rwlock.h
51 1. Added: EllenBinTree - an implementation of unbalanced binary search
52 tree based on paper [2010] F.Ellen, P.Fatourou, E.Ruppert, F.van Breugel
53 "Non-blocking Binary Search Tree".
54 2. Added: MSPriorityQueue - an array-based lock-based priority queue heap,
55 see [1996] G.Hunt, M.Michael, S. Parthasarathy, M.Scott "An efficient
56 algorithm for concurrent priority queue heaps"
57 3. Added support for boost.atomic for boost 1.54 and above.
58 Now, libcds supports processor architecture like ARM, PowerPC and any other
59 that are supported by boost.atomic or by C++11 compiler. Any feedbacks are appreciated.
60 To use boost.atomic you should specify -DCDS_USE_BOOST_ATOMIC in compiler's command line.
61 4. Added: a new CDS_USE_LIBCDS_ATOMIC preprocessor flag has been added to direct
62 the compiler to use libcds atomic unconditionally.
63 5. build.sh has been modified to relax processor architecture and OS requirements.
64 This allows to use libcds with native compiler atomic support (or boost.atomic)
65 for a processor architecture that has not been tested by libcds's developers.
66 6. Added support for CLang 3.3
67 7. Added support for MS VC++ 2013
68 8. Added support for Mac OS X, see build/sample/build-osx-clang-libc++.sh,
69 build/sample/build-osx-gcc.sh for example.
70 9. Fixed: SkipListSet::erase_with does not take into account "less" predicate parameter.
71 10.Fixed: some bugs in SkipListSet leading to deadloop
72 11.Fixed: MichaelMap bug: computing hash value for type Q different from key type.
76 1. Added: user-space RCU garbage collector (5 different implementations),
77 see cds::urcu namespace
78 2. Added: RCU-related set/map container specializations
79 3. Added: Skip-list specialization for cds::gc::nogc (undeletable skip-list)
80 4. For set/map classes: find_with and erase_with member functions have been added.
81 These functions allow to use different predicates for searching.
82 5. Added: threading model based on Ñ++11 thread_local keyword (CDS_THREADING_CXX11).
83 At present, only gcc 4.8 supports such model.
84 6. Fixed: bug #11 "ABA bug in libcds 1.3.1 cds/intrusive/msqueue.h"
85 Thanks to Jelle van den Hooff.
86 7. Added support for GCC 4.8
90 - Bug fixed: building libcds with boost versions before 1.48
91 Thanks Lucas Larsch who points me to this problem.
95 1. Added: StripedSet, StripedMap - hash set and hash map
96 implementation based on fine-grained lock-striping technique
97 2. Added: CuckooSet, CuckooMap - implementation of cuckoo hashing algorithm
98 based on fine-grained lock-striping technique
99 3. Added: SkipListSet, SkipListMap - implementation of lock-free skip list
100 4. Added: template <typename... Args> emplace(Args&&... args) member function
101 for all containers in cds::container namespace. This function is available
102 only if the compiler supports new C++11 features - variadic
103 templates and move semantics.
104 5. Changed: lambda functions are used internally instead of wrapping functors.
105 If the compiler does not support C++11 lambdas the old-style wrapping functors are used.
106 6. Changed: test projects has been splitted for optimizing compile time.
107 7. Breaking change: class cds::lock::Auto has been renamed to cds::lock::scoped_lock,
108 class cds::lock::AutoUnlock has been removed
109 8. Added: support for MinGW (tested with TDM-GCC 64bit, gcc 4.7)
111 1.2.0 20.08.2012 (beta)
113 1. Added: MichaelDeque - deque lock-free algo discovered by Maged Michael
114 2. Added: BasketQueue - Michael's queue modification discovered by Nir Shavit et al.
115 3. Added: support of Clang 3.0, 3.1 compiler (tested on Linux with boost 1.49)
116 4. Fixed: solving problem of 8-byte atomic data alignment on 32-bit platforms
117 5. Fixed bug 3536393: OptimisticQueue core dump
119 1.1.0 17.04.2012 (beta)
121 1. Added: C++11 atomic operations support. The library has been rewritten
122 for using std::atomic class and operations proposed in C++11 Standard.
123 If the compiler does not support the standard <atomic> library,
124 own partial implementation declared in cds/cxx11_atomic.h is used.
125 cxx11_atomic.h contains implementation for lock-free part of C++11
126 <atomic> header needed for libcds.
127 2. Added: support for C++11 feature (if applicable):
128 - inline namespace (for GCC 4.4+)
129 - function =default and =delete specifiers (for GCC 4.4+)
130 3. Changed: the main reclamation cycle ("liberate" function) of cds::gc::PTB
131 memory reclamation schema has been optimized. Previous implementation
132 could lead to unbounded memory consumption under high contention.
133 4. Changed: the internal structure of cds::intrusive::OptimisticQueue is greatly simplified.
134 The interface of the class is slightly changed.
135 5. Fixed: some problem with cds::gc::HRC memory reclamation schema that
136 could be the cause of occasional program crash.
137 6. Fixed: an error in node reclamation algo in queue implementation (MSQueue, MoirQueue,
138 OptimisticQueue). As an result of the error, some items could be lost with memory leaks.
139 7. Changed: cds::concept namespace and its content has been removed
140 8. Added support for Microsoft Visual C++ 11 Beta
141 9. Added support for GCC 4.7
143 1.0.0 31.12.2011 (beta)
144 This version is completely rewritten to support intrusive version of lock-free containers
145 and more lightweight garbage collectors interface.
146 The class hierarchy and interfaces have been completely reimplemented from scratch.
148 1. Added: intrusive containers. Many lock-free containers in libcds have the intrusive
149 counterparts. The library is fully refactored to support intrusive containers.
150 Class hierarchy is changed: almost all non-intrusive container classes are based
151 on their intrusive versions.
152 Two new namespace is added:
153 cds::intrusive - for intrusive containers
154 cds::container - for non-intrusive containers
155 Namespaces by container type (cds::queue, cds::map and so on) have been removed.
156 2. Added: New option-based approach is used for class declaration instead
157 old traits-based one. This approach allows to declare template arguments
158 in position-independent manner that is very useful for complex template declarations.
159 Option-based declarations use C++0x variadic templates if compiler supports it (GCC),
160 otherwise (MS VC) an emulation is used.
161 3. Changed: garbage collectors interface is generalized. cds::gc::GC (where GC is
162 one of HP, HRC, PTB) classes has been added.
163 4. Removed: tagged pointer GC. This GC
164 - unsafe for complex data structure
165 - x86-specific since it requires double-width CAS primitive
166 - memory-consuming since it requires separate free-list for each type stored in the containers
167 5. Default threading model is changed (see doc for cds::threading namespace):
168 - for Windows and MSVC++, CDS_THREADING_WIN_TLS is the default now
169 - for *nix and GCC, CDS_THREADING_PTHREAD is the default now
170 6. Added GCC 4.6 support (constexpr)
171 7. Added Microsoft Visual Studio 2010 (vc10) solution
173 0.8.0 28.03.2011 (beta)
174 1. Added: cds::Initialize and cds::Terminate functions that initializes and frees library's
176 2. Added: cds::memory::michael::Heap - Michael's lock-free allocator
177 3. Added: Exponential back-off strategy for spinning
178 4. Added: cds::queue::vyukov_mpmc_bounded - bounded queue
179 developed by Dmitry Vyukov (http://www.1024cores.net)
180 5. Added: support for FreeBSD amd64, x86
182 0.7.2 27.02.2011 (beta)
183 1. [Bug 3157201] Added implementation of threading manager based on Windows TLS API, see
184 cds::threading::wintls::Manager. Added CDS_THREADING_WIN_TLS macro. See docs for
185 cds::threading namespace for details.
186 2. Fixed bug in cds::threading::pthread::Manager: ptb_gc has not been initialized properly.
188 template <typename T, typename FUNC>
189 bool erase( const key_type& key, T& dest, FUNC func ) ;
190 has been added to all map classes.
192 template <typename T, typename FUNC>
193 bool insert( const key_type& key, T& val, FUNC func ) ;
194 has been added to all map classes.
195 5. Added new argument "bNew" to functor "func" of map's "ensure" member function:
196 void func( VALUE& itemValue, const VALUE& val, bool bNew ) ;
197 bNew = true if new item has been added
198 bNew = false if key is found
199 6. Fixed bug in cds::map::SplitOrderedList: LSB of dummy node's hash should be zero
200 7. Changed: thread liveliness checking on *nix has been changed to pthread_kill(id, 0).
201 8. Fixed: in map template member functions the functor may be passed by value
202 or by reference; use boost::ref( yourFunctor ) to pass your functor by reference
203 9. Fixed: cds::gc::tagged GC and all classes based on this GC has been rewritten
204 to solve stability problems.
206 0.7.1 30.12.2010 (beta)
207 1. [Bug 3130852] cds::queue::TZCyclicQueue::empty() has been corrected
208 2. [Bug 3128161] It seems, GCC 4.4 has a bug in __thread on x86 and x86_64. New "threading model"
209 CDS_THREADING_AUTODETECT has been added. See docs of cds::threading namespace for details
210 3. Fixed errors in the "Pass-the-Buck" garbage collector (namespace cds::gc::ptb)
211 4. [Bug 3128148] The code is aligned with the C++ standard (minor violations has been removed)
212 5. [Bug 3141654] missing break statement for atomic store - fixed
213 6. Added in-place scan strategy to cds::gc::hzp::GarbageCollector that does not allocate any memory.
214 7. Fixed bugs in HRC and tagged GC
216 0.7.0 05.12.2010 (beta)
217 1. Preliminary support for "Pass The Buck" memory manager is added. See cds::gc::ptb namespace.
218 2. Many part of library is rewritten to generalize the usage of various GCs
219 3. The new class cds::details::aligned_allocator has been added for allocating aligned memory
220 blocks. It is useful for Tagged Pointer memory reclamation schema (cds::gc::tagged_gc).
221 4. [Break change] New argument has been added to the member functions "ensure" and "find"
222 for ordered list and map classes
223 5. New member function "emplace" has been added to ordered list and map classes. This member function
224 allows change the value (or a part of it) of list/map item.
225 6. The internal structure of class cds::map::MichaelHashMap is completely refactored to support
226 cds::gc::no_gc correctly
227 7. The classes RecursiveSpinT, RecursiveSpin32, RecursiveSpin64, and RecursiveSpin from cds::lock
228 namespace have been renamed to ReentrantSpinT, ReentrantSpin32, ReentrantSpin64, and ReentrantSpin
230 8. Compiler support: GCC version below 4.3.0 is not supported
231 9. Fixed memory leak in cds::map::SplitOrderedList
232 10. Added compiler barrier to spin-lock release primitive for x86 and amd64
233 11. Makefile script is changed to resolve the problem when an user calls 'make clean' directly.
234 Thanks to Tamas Lengyel to point me to this bug.
235 12. The file dictionary.txt is exluded from distributive. This file is used for testing purposes only.
236 You may create dictionary.txt in this way:
240 0.6.0 26.03.2010 (beta)
241 1. The library is rewritten using atomic primitives with explicit memory ordering (based on C++
242 memory model proposal). The implementation of atomic primitives for supported architectures
243 is developed from scratch.
246 0.5.0 31.12.2009 (beta)