[/

(C) Copyright 2007-11 Anthony Williams.

(C) Copyright 2011-18 Vicente J. Botet Escriba.

Distributed under the Boost Software License, Version 1.0.

(See accompanying file LICENSE_1_0.txt or copy at

http://www.boost.org/LICENSE_1_0.txt).

]

[section:changes History]

[heading Version 4.9.0 - boost 1.70]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

* [@http://svn.boost.org/trac/boost/ticket/10964 #10964] future<future<T>>::unwrap().then() Deadlocks

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread master regression test] to see the last regression test snapshot.

[*Fixed Bugs:]

* [@https://github.com/boostorg/thread/pull/268] Add self contained header tests and fix discovered bugs

* Improvements support for cygwin platform using the pthread interface.

* [@https://github.com/boostorg/thread/pull/263] Fix compilation of timed functions on Cygwin

$ [@https://github.com/boostorg/thread/pull/262] Fix MinGW warnings about violation of the strict aliasing rules

* [@https://github.com/boostorg/thread/pull/260] Fix "interruption_point" defined twice.

* [@https://github.com/boostorg/thread/pull/249] Simplify TSS cleanup routines. Fixes #236

[*New Experimental Features:]

* Since BOOST_THREAD_VERSION 5, BOOST_THREAD_USES_EXECUTOR is defined by default.

* [@https://github.com/boostorg/thread/pull/266] Remove linking with Boost.System

[heading Version 4.8.1 - boost 1.67]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

* [@http://svn.boost.org/trac/boost/ticket/10964 #10964] future<future<T>>::unwrap().then() Deadlocks

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread master regression test] to see the last regression test snapshot.

[*Fixed Bugs:]

* [@https://github.com/boostorg/thread/issues/162 #162] fix as much time-related issues as possible and improve the QOI

* [@https://github.com/boostorg/thread/issues/193 #193] future_then unit test contains two different implementations of do_continuation function

* [@https://github.com/boostorg/thread/issues/209 #209] Legal problem with `win32/thread_primitives.hpp`

[heading Version 4.8.0 - boost 1.66]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

* [@http://svn.boost.org/trac/boost/ticket/10964 #10964] future<future<T>>::unwrap().then() Deadlocks

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread master regression test] to see the last regression test snapshot.

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/12323 #12323] windows - boost/thread/win32/mfc_thread_init.hpp has wrong signature for _pRawDllMainOrig

* [@http://svn.boost.org/trac/boost/ticket/12730 #12730] windows - static threads library is incompatible with MSVC 2017 RC

* [@http://svn.boost.org/trac/boost/ticket/12976 #12976] Boost Thread Executors documentation mistakes

* [@http://svn.boost.org/trac/boost/ticket/12949 #12949] using sleep_for in a thread context without including boost/thread/thread.hpp yields incorrect behaviour when BOOST_THREAD_HAS_CONDATTR_SET_CLOCK_MONOTONIC is defined

* [@http://svn.boost.org/trac/boost/ticket/13019 #13019] ABI compatibility for BOOST_THREAD_PROVIDES_INTERRUPTIONS incomplete

* [@http://svn.boost.org/trac/boost/ticket/13069 #13069] Boost unit test "sync_pq_multi_thread_p_lib.exe" hung in thread library

* [@http://svn.boost.org/trac/boost/ticket/13163 #13163] boost::detail::heap_new does not have a variadic variant

* [@http://svn.boost.org/trac/boost/ticket/13226 #13226] getpagesize() is deprecated since 199506L

* [@https://github.com/boostorg/thread/issues/132 #132] VS 2017.4 Preview deadlocks on Test 10964

* [@https://github.com/boostorg/thread/issues/133 #133] windows - Spurious timing test failures on windows

* [@https://github.com/boostorg/thread/issues/134 #134] VS 2017.4 Preview deadlock in sync_pq_multi_thread_p_lib.exe

* [@https://github.com/boostorg/thread/issues/135 #135] VS 2017.4 Preview test_scheduled_tp_p.exe deadlock

* [@https://github.com/boostorg/thread/issues/136 #136] VS 2017.4 Preview test_scheduler_p.exe deadlock

* [@https://github.com/boostorg/thread/issues/137 #137] VS 2017.4 Preview executor_ex.exe deadlock

* [@https://github.com/boostorg/thread/issues/143 #143] Failures on msvc-12.0

* [@https://github.com/boostorg/thread/issues/145 #145] Clang build error with BOOST_THREAD_ATTRIBUTE_MAY_ALIAS

[*New Experimental Features:]

* [@https://github.com/boostorg/thread/issues/116 #116] [Proposal] Add APIs for deferred set_value/exception

[heading Version 4.7.5 - boost 1.65.1]

[*Fixed Bugs:]

* [@https://github.com/boostorg/thread/issues/130 #130] windows: Bug in boost::condition_variable on Windows

[heading Version 4.7.4 - boost 1.65]

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/6787 #6787] boost::thread::sleep() hangs if system time is rolled back

* [@http://svn.boost.org/trac/boost/ticket/12519 #12519] boost::thread::try_join_for does not return after timeout

* [@http://svn.boost.org/trac/boost/ticket/12874 #12874] future<> extension constructor must be under BOOST_THREAD_PROVIDES_FUTURE_UNWRAP

* [@http://svn.boost.org/trac/boost/ticket/12888 #12888] Linking with boost thread does not work on mingw/gcc 4.4

* [@http://svn.boost.org/trac/boost/ticket/12958 #12958] sync_bounded_queue::wait_pull_front( lve ) might throw

* [@http://svn.boost.org/trac/boost/ticket/13077 #13077] Linking to static 64bit libboost_thread fails DLL initialization

* [@http://svn.boost.org/trac/boost/ticket/13155 #13155] log doesn't build on a system with pthreads

* [@https://github.com/boostorg/thread/issues/121 #121] on_tls_prepare is broken under VS2017

[heading Version 4.7.3 - boost 1.64]

[*Fixed Bugs:]

* [@https://github.com/boostorg/thread/issues/113 #113] Add a Thread template on all the scoped thread and thread guard classes

* [@https://github.com/boostorg/thread/issues/117 #117] loop_executor should block on it's work_queue instead of polling

* [@https://github.com/boostorg/thread/issues/119 #119] basic_condition_variable::relocker::~relocker can throw an exception

[heading Version 4.7.2 - boost 1.63]

[*Fixed Bugs:]

* fix boost::synchronized_value<>::load()

* fix relational operators of boost::synchronized_value<>

* fix compile failed with boost::user_scheduler

* Fix minor possibility of loosing the notify

[heading Version 4.7.1 - boost 1.62]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

Please define BOOST_THREAD_PATCH to apply the patch that could unfortunately results is a regression as described in [@http://svn.boost.org/trac/boost/ticket/12049 #12049].

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread master regression test] to see the last regression test snapshot.

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/11097 #11097] test_scheduled_tp - ThreadSanitizer: heap-use-after-free

* [@http://svn.boost.org/trac/boost/ticket/11951 #11951] Memory leak in boost::when_all

* [@http://svn.boost.org/trac/boost/ticket/12102 #12102] condition_variable_fwd.hpp fails to compile when BOOST_THREAD_PROVIDES_INTERRUPTIONS is disabled

* [@http://svn.boost.org/trac/boost/ticket/12120 #12120] Performance improvement in thread/barrier.hpp

* [@http://svn.boost.org/trac/boost/ticket/12146 #12146] make_exceptional_future is not mentioned in the docs

* [@http://svn.boost.org/trac/boost/ticket/12202 #12202] shared_lock should be in shared_mutex header

* [@http://svn.boost.org/trac/boost/ticket/12220 #12220] Memory leak in future::then()

* [@http://svn.boost.org/trac/boost/ticket/12293 #12293] boost::future::then lambda called before future is ready.

* [@http://svn.boost.org/trac/boost/ticket/12350 #12350] shared_mutex (pthreads) unlocked too early in unlock_shared()

* [@http://svn.boost.org/trac/boost/ticket/12371 #12371] boost thread/future.hpp fails to build

and several PR

* #88 fix typos in boost::upgrade_lock

* #89 fix a bug in upgrade_to_unique_lock<>::operator=()

* #90 fix a bug in try_lock_wrapper<>::operator=()

* #91 Add shared_lock_guard to the included lock types

* #92 Fixed compilation with MSVC-8.

* #93 Fix variable shadowing warnings (Clang)

* #94 fix bugs in boost::barrier

* #95 fix a mistake in boost::completion_latch

* #96 rename async_func.hpp to invoker.hpp.

* #97 fix a mistake in sync_timed_queue<>::pull_until()

[heading Version 4.7.0 - boost 1.61]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

Please define BOOST_THREAD_PATCH to apply the patch that could unfortunately results is a regression as described in [@http://svn.boost.org/trac/boost/ticket/12049 #12049].

* [@http://svn.boost.org/trac/boost/ticket/4833 #4833] MinGW/test_tss_lib: Support of automatic tss cleanup for native threading API not available

* [@http://svn.boost.org/trac/boost/ticket/8600 #8600] wait_for_any hangs, if called with multiple copies of shared_future referencing same task

* [@http://svn.boost.org/trac/boost/ticket/9118 #9118] Seg fault on thread join when llvm and libc++ are used

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread trunk regression test] to see the last regression test snapshot.

[*New Experimental Features:]

* [@http://svn.boost.org/trac/boost/ticket/11772 #11772] Add a launch::sync policy

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/11494 #11494] boost::this_thread::yield() is marked as deprecated in the synopsis

* [@http://svn.boost.org/trac/boost/ticket/11562 #11562] (condition_variable_any::wait_until + recursive_mutex + steady_clock) timer expires after computer time is set forward on Ubuntu 64-bit

* [@http://svn.boost.org/trac/boost/ticket/12013 #12013] F_pass and FArgs_pass tests segfault

* [@http://svn.boost.org/trac/boost/ticket/12036 #12036] boost::physical_concurrency always returns 0 if BOOST_USE_WINAPI_VERSION is not defined

[heading Version 4.6.0 - boost 1.60]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/4833 #4833] MinGW/test_tss_lib: Support of automatic tss cleanup for native threading API not available

* [@http://svn.boost.org/trac/boost/ticket/8600 #8600] wait_for_any hangs, if called with multiple copies of shared_future referencing same task

* [@http://svn.boost.org/trac/boost/ticket/9118 #9118] Seg fault on thread join when llvm and libc++ are used

* [@http://svn.boost.org/trac/boost/ticket/10942 #10942] Boost.Thread fails to build on Cygwin.

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread trunk regression test] to see the last regression test snapshot.

[*New Experimental Features:]

* [@http://svn.boost.org/trac/boost/ticket/11231 #11231] Allow to set continuation future's destructor behavior to non-blocking

* [@http://svn.boost.org/trac/boost/ticket/11424 #11424] Provide shared_timed_mutex as an alternative name for shared_mutex and deprecate the use of shared_mutex as a timed mutex

* [@http://svn.boost.org/trac/boost/ticket/11734 #11734] future::then(Cont) should be able to execute the continuation on undetermined thread

* [@http://svn.boost.org/trac/boost/ticket/11736 #11736] Allow to use launch::executor on future::then(launch::executor, cont)

* [@http://svn.boost.org/trac/boost/ticket/11737 #11737] Add a launch::inherit policy that can be used on ::then() to use the policy of the parent future

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/6377 #6377] Condition variable blocks when changing time

* [@http://svn.boost.org/trac/boost/ticket/6787 #6787] boost::thread::sleep() hangs if system time is rolled back

* [@http://svn.boost.org/trac/boost/ticket/7665 #7665] this_thread::sleep_for no longer uses steady_clock in thread

* [@http://svn.boost.org/trac/boost/ticket/7720 #7720] exception lock_error while intensive locking/unlocking of mutex

* [@http://svn.boost.org/trac/boost/ticket/9309 #9309] test_latch fails often on clang-darwin-tot11

* [@http://svn.boost.org/trac/boost/ticket/10788 #10788] GetLogicalProcessor isn't available for Windows platform less or equals to 0x0502

* [@http://svn.boost.org/trac/boost/ticket/11090 #11090] ex_future_unwrap- ThreadSanitizer: lock-order-inversion (potential deadlock)

* [@http://svn.boost.org/trac/boost/ticket/11158 #11158] Pthread thread deadlock when faketime used

* [@http://svn.boost.org/trac/boost/ticket/11174 #11174] boost::condition_variable::timed_wait with predicate unexpectedly wakes up while should wait infinite

* [@http://svn.boost.org/trac/boost/ticket/11185 #11185] Incorrect URL redirection

* [@http://svn.boost.org/trac/boost/ticket/11192 #11192] boost::future<>::then() with an executor doesn't compile when the callback returns a future

* [@http://svn.boost.org/trac/boost/ticket/11250 #11250] future made from make_exceptional fails on assertion in destructor

* [@http://svn.boost.org/trac/boost/ticket/11256 #11256] future<>::is_ready() == false in continuation function

* [@http://svn.boost.org/trac/boost/ticket/11261 #11261] bad use of scoped threads in basic_thread_pool

* [@http://svn.boost.org/trac/boost/ticket/11262 #11262] bad use of direct pointer in shared_state_nullary_task

* [@http://svn.boost.org/trac/boost/ticket/11263 #11263] lock already locked lock

* [@http://svn.boost.org/trac/boost/ticket/11266 #11266] boost::packaged_task has invalid variadic signature

* [@http://svn.boost.org/trac/boost/ticket/11302 #11302] boost thread doesn't build with BOOST_THREAD_PATCH.

* [@http://svn.boost.org/trac/boost/ticket/11322 #11322] sleep_for() nanoseconds overload will always return too early on windows

* [@http://svn.boost.org/trac/boost/ticket/11329 #11329] using declarative for GetProcessHeap, .... fails

* [@http://svn.boost.org/trac/boost/ticket/11368 #11368] boost thread's usage of CreateWaitableTimer wakes PC from sleep (doh)

* [@http://svn.boost.org/trac/boost/ticket/11377 #11377] Boost condition variable always waits for system clock deadline

* [@http://svn.boost.org/trac/boost/ticket/11435 #11435] gcc compiler warning in future.hpp

* [@http://svn.boost.org/trac/boost/ticket/11555 #11555] devector.hpp assumes allocator_traits_type is always present

* [@http://svn.boost.org/trac/boost/ticket/11562 #11562] (condition_variable_any::wait_until + recursive_mutex + steady_clock) timer expires after computer time is set forward on Ubuntu 64-bit

* [@http://svn.boost.org/trac/boost/ticket/11672 #11672] Thread: Should use unique_ptr, not auto_ptr

* [@http://svn.boost.org/trac/boost/ticket/11688 #11688] thread::try_join_until: Avoid busy wait if system clock changes

* [@http://svn.boost.org/trac/boost/ticket/11672 #11716] ::then(f) should inherit the parent Executor

* [@http://svn.boost.org/trac/boost/ticket/11795 #11795] Incorrect version specification for documentation of thread destructor

* [@http://svn.boost.org/trac/boost/ticket/11796 #11796] Thread move assignment operator, does not detach previous thread data

* [@http://svn.boost.org/trac/boost/ticket/11817 #11817] 'sync_queue_is_closed' was not declared in boost/thread/executors/thread_executor.hpp

* [@http://svn.boost.org/trac/boost/ticket/11818 #11818] future.then will be blocked if promise is set after the invocation of then

* [@http://svn.boost.org/trac/boost/ticket/12049 #12049] Assertion failure from detached threads during shutdown

[heading Version 4.5.0 - boost 1.58]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

* [@http://svn.boost.org/trac/boost/ticket/4833 #4833] MinGW/test_tss_lib: Support of automatic tss cleanup for native threading API not available

* [@http://svn.boost.org/trac/boost/ticket/8600 #8600] wait_for_any hangs, if called with multiple copies of shared_future referencing same task

* [@http://svn.boost.org/trac/boost/ticket/9118 #9118] Seg fault on thread join when llvm and libc++ are used

* [@http://svn.boost.org/trac/boost/ticket/9309 #9309] test_latch fails often on clang-darwin-tot11

* [@http://svn.boost.org/trac/boost/ticket/9311 #9311] ex_lambda_future fails on msvc-11.0

* [@http://svn.boost.org/trac/boost/ticket/10942 #10942] Boost.Thread fails to build on Cygwin.

[/

* [@http://svn.boost.org/trac/boost/ticket/7319 #7319] Take care of c++std-lib-32966 issue

* [@http://svn.boost.org/trac/boost/ticket/10651 #10651] boost::thread leaks memory when using the MinGW compiler.

* [@http://svn.boost.org/trac/boost/ticket/10685 #10685] mfc_thread_init.hpp does not compile.

* [@http://svn.boost.org/trac/boost/ticket/10967 #10967] Timed wait points inconsistently convert relative to absolute waits.

]

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread trunk regression test] to see the last regression test snapshot.

[*Sever limitations:]

There are some severe bugs that prevent the use of the library on concrete contexts, in particular:

* on thread specific storage that prevent the library to be used with dynamic libraries ( [@http://svn.boost.org/trac/boost/ticket/3926 #3926], ),

[*New Experimental Features:]

* [@http://svn.boost.org/trac/boost/ticket/9600 #9600] Async: Add task_region

* [@http://svn.boost.org/trac/boost/ticket/10611 #10611] Add emplace promise::set_value and emplace make_ready_future

* [@http://svn.boost.org/trac/boost/ticket/10826 #10826] Add scheduled executor operations

* [@http://svn.boost.org/trac/boost/ticket/11048 #11048] Add a serial_executor based on continuations

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/6787 #6787] boost::thread::sleep() hangs if system time is rolled back

* [@http://svn.boost.org/trac/boost/ticket/10734 #10734] Submit method work differently on different executors, some throw exception and some silently ignore error (thread_executor and inline_executor)

* [@http://svn.boost.org/trac/boost/ticket/10736 #10736] Task exceptions silently ignored. I think std::terminate solution from N3785 and std::thread is better choice and more consistent.

* [@http://svn.boost.org/trac/boost/ticket/10737 #10737] In serial_executor we have infinite wait if task throw exception.

* [@http://svn.boost.org/trac/boost/ticket/10822 #10822] Boost.Thread fails to compile on Android

* [@http://svn.boost.org/trac/boost/ticket/10824 #10824] Boost.Thread 1.57 breaks Windows XP compatibility for SP2 and below.

* [@http://svn.boost.org/trac/boost/ticket/10963 #10963] future<future<T>>::then Has No Implementation

* [@http://svn.boost.org/trac/boost/ticket/10964 #10964] future<future<T>>::unwrap().then() Deadlocks

* [@http://svn.boost.org/trac/boost/ticket/10968 #10968] The futures returned by async() and future::then() are not blocking.

* [@http://svn.boost.org/trac/boost/ticket/10971 #10971] shared_future::get()/get_or() must be const

* [@http://svn.boost.org/trac/boost/ticket/10972 #10972] shared_future::then() can be called multiple times.

* [@http://svn.boost.org/trac/boost/ticket/10979 #10979] Support T& type deduction when the make_ready_future parameter is reference_wrapper<T>

* [@http://svn.boost.org/trac/boost/ticket/10996 #10996] Thread physical_concurrency() is failing on Windows

* [@http://svn.boost.org/trac/boost/ticket/11035 #11035] BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE not defined for Android

* [@http://svn.boost.org/trac/boost/ticket/11053 #11053] The attached code results in a R6025 - pure virtual function call in run_thread_exit_callbacks

[heading Version 4.4.0 - boost 1.57]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/2442 #2442] Application statically linked with Boost.Thread crashes when Google Desktop is installed (Windows XP)

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

* [@http://svn.boost.org/trac/boost/ticket/4833 #4833] MinGW/test_tss_lib: Support of automatic tss cleanup for native threading API not available

* [@http://svn.boost.org/trac/boost/ticket/7319 #7319] Take care of c++std-lib-32966 issue

* [@http://svn.boost.org/trac/boost/ticket/8600 #8600] wait_for_any hangs, if called with multiple copies of shared_future referencing same task

* [@http://svn.boost.org/trac/boost/ticket/9118 #9118] Seg fault on thread join when llvm and libc++ are used

* [@http://svn.boost.org/trac/boost/ticket/9309 #9309] test_latch fails often on clang-darwin-tot11

* [@http://svn.boost.org/trac/boost/ticket/9310 #9310] test_4648_lib fails on clang-darwin-asan11

* [@http://svn.boost.org/trac/boost/ticket/9311 #9311] ex_lambda_future fails on msvc-11.0

* [@http://svn.boost.org/trac/boost/ticket/10537 #10537] Application crash on throw exception

* [@http://svn.boost.org/trac/boost/ticket/10651 #10651] boost::thread leaks memory when using the MinGW compiler

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread trunk regression test] to see the last snapshot.

[*Sever limitations:]

There are some severe bugs that prevent the use of the library on concrete contexts, in particular:

* on thread specific storage that prevent the library to be used with dynamic libraries,

[*New Experimental Features:]

* [@http://svn.boost.org/trac/boost/ticket/6227 #6227] Synchro: Use of variadic templates on Generic Locking Algorithms on compilers providing them

* [@http://svn.boost.org/trac/boost/ticket/10298 #10298] Synchro: Added queue views.

* [@http://svn.boost.org/trac/boost/ticket/10300 #10300] Async: Added generic_executor_ref.

* [@http://svn.boost.org/trac/boost/ticket/10552 #10552] Add make_valid_future

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/6782 #6782] call_once uses incorrect barrier intrinsic on Visual Studio

* [@http://svn.boost.org/trac/boost/ticket/6787 #6787] boost::thread::sleep() hangs if system time is rolled back

* [@http://svn.boost.org/trac/boost/ticket/7665 #7665] this_thread::sleep_for no longer uses steady_clock in thread

* [@http://svn.boost.org/trac/boost/ticket/9307 #9307] future::fallback_to assert with ERRORRRRR boost: mutex lock failed in pthread_mutex_lock: Invalid argument

* [@http://svn.boost.org/trac/boost/ticket/9308 #9308] future::async fails with terminate called throwing an exception when called with a lambda - clang-darwin-asan11

* [@http://svn.boost.org/trac/boost/ticket/9310 #9310] test_4648_lib fails on clang-darwin-asan11

* [@http://svn.boost.org/trac/boost/ticket/9425 #9425] Boost promise & future does not use supplied allocator for value storage

* [@http://svn.boost.org/trac/boost/ticket/9558 #9558] future continuations unit test hangs in get()/pthread_cond_wait() on Mac 10.7/32-bit/x86/darwin-4.2.1

* [@http://svn.boost.org/trac/boost/ticket/9787 #9787] [windows] Small duration value passed down to basic_timed_mutex::try_lock_until and condition_variable::wait_until can cause infinite or near infinite wait for win32

* [@http://svn.boost.org/trac/boost/ticket/9880 #9880] [windows] boost::condition_variable.timed_wait() exception if system time < 1970

* [@http://svn.boost.org/trac/boost/ticket/10159 #10159] GCC 4.4 error sorry, unimplemented

* [@http://svn.boost.org/trac/boost/ticket/10196 #10196] thread_specific_ptr does not support void*

* [@http://svn.boost.org/trac/boost/ticket/10296 #10296] Boost.Thread 1.56 rc1 does not compile on Mingw

* [@http://svn.boost.org/trac/boost/ticket/10297 #10297] Boost.Thread 1.56 rc1 hangs when built with clang on armhf

* [@http://svn.boost.org/trac/boost/ticket/10340 #10340] No boost::promise<T>::set_value(const T&) overload present in C++03 mode

* [@http://svn.boost.org/trac/boost/ticket/10425 #10425] Missing documentation for when_all/when_any.

* [@http://svn.boost.org/trac/boost/ticket/10426 #10426] Take in account the deferred futures in when_all.

* [@http://svn.boost.org/trac/boost/ticket/10427 #10427] Take in account the deferred and ready futures in when_any.

* [@http://svn.boost.org/trac/boost/ticket/10428 #10428] Adapt to new unique_ptr interface in Boost.Move

* [@http://svn.boost.org/trac/boost/ticket/10465 #10465] Missing implementation of when_all/when_any when the result is a tuple.

* [@http://svn.boost.org/trac/boost/ticket/10476 #10476] classes using BOOST_THREAD_MOVABLE_ONLY<T> dont satisfy is_copy_constructible<T>::value == false

* [@http://svn.boost.org/trac/boost/ticket/10478 #10478] Data race in boost/thread/future.hpp

* [@http://svn.boost.org/trac/boost/ticket/10529 #10529] The pthread/condition_variable_any constructor reports incorrect error code for pthread_cond_init

* [@http://svn.boost.org/trac/boost/ticket/10563 #10563] shared_future<R>::then should be const

[heading Version 4.3.0 - boost 1.56]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/2442 #2442] Application statically linked with Boost.Thread crashes when Google Desktop is installed (Windows XP)

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

* [@http://svn.boost.org/trac/boost/ticket/4833 #4833] MinGW/test_tss_lib: Support of automatic tss cleanup for native threading API not available

* [@http://svn.boost.org/trac/boost/ticket/6782 #6782] call_once uses incorrect barrier intrinsic on Visual Studio

* [@http://svn.boost.org/trac/boost/ticket/7319 #7319] Take care of c++std-lib-32966 issue

* [@http://svn.boost.org/trac/boost/ticket/8600 #8600] wait_for_any hangs, if called with multiple copies of shared_future referencing same task

* [@http://svn.boost.org/trac/boost/ticket/9307 #9307] future::fallback_to assert with ERRORRRRR boost: mutex lock failed in pthread_mutex_lock: Invalid argument

* [@http://svn.boost.org/trac/boost/ticket/9308 #9308] future::async fails with terminate called throwing an exception when called with a lambda - clang-darwin-asan11

* [@http://svn.boost.org/trac/boost/ticket/9310 #9310] test_4648_lib fails on clang-darwin-asan11

* [@http://svn.boost.org/trac/boost/ticket/9311 #9311] ex_lambda_future fails on msvc-11.0

* [@http://svn.boost.org/trac/boost/ticket/9425 #9425] Boost promise & future does not use supplied allocator for value storage

* [@http://svn.boost.org/trac/boost/ticket/9558 #9558] future continuations unit test hangs in get()/pthread_cond_wait() on Mac 10.7/32-bit/x86/darwin-4.2.1

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread Know Bugs] to see the current state.

Please take a look at [@http://www.boost.org/development/tests/master/developer/thread.html thread trunk regression test] to see the last snapshot.

[*Sever limitations:]

There are some severe bugs that prevent the use of the library on concrete contexts, in particular:

* on thread specific storage that prevent the library to be used with dynamic libraries,

* The experimental features of boost::future have some severe holes that make the program crash unexpectedly.

[*New Experimental Features:]

* [@http://svn.boost.org/trac/boost/ticket/7446 #7446] Async: Add when_any.

* [@http://svn.boost.org/trac/boost/ticket/7447 #7447] Async: Add when_all.

* [@http://svn.boost.org/trac/boost/ticket/7448 #7448] Async: Add async taking a scheduler parameter.

* [@http://svn.boost.org/trac/boost/ticket/8274 #8274] Synchro: Add concurrent queue

* [@http://svn.boost.org/trac/boost/ticket/8518 #8518] Synchro: Add a latch class.

* [@http://svn.boost.org/trac/boost/ticket/8513 #8513] Async: Add a basic thread_pool executor.

* [@http://svn.boost.org/trac/boost/ticket/8516 #8516] Async: Add future/shared_future::then taking a scheduler as parameter.

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/8070 #8070] prefer GetTickCount64 over GetTickCount

* [@http://svn.boost.org/trac/boost/ticket/9333 #9333] ex_scoped_thread compile fails on msvc-12.0

* [@http://svn.boost.org/trac/boost/ticket/9366 #9366] async(Executor, ...) fails to compile with msvc-10,11,12

* [@http://svn.boost.org/trac/boost/ticket/9402 #9402] test_excutor regression on msvc-10,11,12

* [@http://svn.boost.org/trac/boost/ticket/9404 #9404] ex_make_future regression error

* [@http://svn.boost.org/trac/boost/ticket/9471 #9471] Synchronization documentation nits

* [@http://svn.boost.org/trac/boost/ticket/9535 #9535] Missing exception safety might result in crash

* [@http://svn.boost.org/trac/boost/ticket/9618 #9618] try_join_for problem: program is not terminate.

* [@http://svn.boost.org/trac/boost/ticket/9673 #9673] thread compilation with MingW/gcc on Windows gives errors

* [@http://svn.boost.org/trac/boost/ticket/9708 #9708] boost::condition_variable::timed_wait unexpectedly wakes up while should wait infinite

* [@http://svn.boost.org/trac/boost/ticket/9711 #9711] future continuation called twice

[heading Version 4.2.0 - boost 1.55]

[*Know Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/2442 #2442] Application statically linked with Boost.Thread crashes when Google Desktop is installed (Windows XP)

* [@http://svn.boost.org/trac/boost/ticket/3926 #3926] thread_specific_ptr + dlopen library causes a SIGSEGV.

* [@http://svn.boost.org/trac/boost/ticket/4833 #4833] MinGW/test_tss_lib: Support of automatic tss cleanup for native threading API not available

* [@http://svn.boost.org/trac/boost/ticket/6782 #6782] call_once uses incorrect barrier intrinsic on Visual Studio

* [@http://svn.boost.org/trac/boost/ticket/7319 #7319] Take care of c++std-lib-32966 issue

* [@http://svn.boost.org/trac/boost/ticket/8600 #8600] wait_for_any hangs, if called with multiple copies of shared_future referencing same task

* [@http://svn.boost.org/trac/boost/ticket/9307 #9307] future::fallback_to assert with ERRORRRRR boost: mutex lock failed in pthread_mutex_lock: Invalid argument

* [@http://svn.boost.org/trac/boost/ticket/9308 #9308] future::async fails with terminate called throwing an exception when called with a lambda - clang-darwin-asan11

* [@http://svn.boost.org/trac/boost/ticket/9311 #9311] ex_lambda_future fails on msvc-11.0

* [@http://svn.boost.org/trac/boost/ticket/9310 #9310] test_4648_lib fails on clang-darwin-asan11

Please take a look at [@https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=thread&type=!Feature+Requests&col=id&col=summary&order=id thread trunk regression test] to see the current state.

[*Sever limitations:]

There are some severe bugs that prevent the use of the library on concrete contexts, in particular:

* on thread specific storage that prevent the library to be used with dynamic libraries,

* The experimental features of boost::future have some severe holes that make the program crash unexpectedly.

[*New Features:]

* [@http://svn.boost.org/trac/boost/ticket/8519 #8519] Synchro: Update class barrier with a completion function.

* [@http://svn.boost.org/trac/boost/ticket/8515 #8515] Async: Add shared_future::then.

* [@http://svn.boost.org/trac/boost/ticket/8519 #8519] Synchro: Update class barrier with a completion function

* [@http://svn.boost.org/trac/boost/ticket/8615 #8615] Async: Replace make_future/make_shared_future by make_ready_future.

* [@http://svn.boost.org/trac/boost/ticket/8627 #8627] Async: Add future<>::unwrap and unwrapping constructor.

* [@http://svn.boost.org/trac/boost/ticket/8677 #8677] Async: Add future<>::get_or.

* [@http://svn.boost.org/trac/boost/ticket/8678 #8678] Async: Add future<>::fallback_to.

* [@http://svn.boost.org/trac/boost/ticket/8891 #8891] upgrade_to_unique_lock: missing mutex() function.

* [@http://svn.boost.org/trac/boost/ticket/8955 #8955] Request for more efficient way to get exception_ptr from future.

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/7461 #7461] detail::win32::ReleaseSemaphore may be called with count_to_release equal to 0

* [@http://svn.boost.org/trac/boost/ticket/8070 #8070] prefer GetTickCount64 over GetTickCount

* [@http://svn.boost.org/trac/boost/ticket/8768 #8768] win32 condition_variable::wait_until infinite wait in rare cases.

* [@http://svn.boost.org/trac/boost/ticket/8817 #8817] Boost Thread Windows CE _createthreadex handling breaks mingw w64.

* [@http://svn.boost.org/trac/boost/ticket/8943 #8943] Failed to compile code using boost::call_once with Intel C++ Composer XE 2013 on Windows.

* [@http://svn.boost.org/trac/boost/ticket/8931 #8931] Typos in external_locking reference.

* [@http://svn.boost.org/trac/boost/ticket/9029 #9029] Misprint in documentation.

* [@http://svn.boost.org/trac/boost/ticket/9037 #9037] gcc -Wshadow gives warnings in condition_variable{,_fwd}.hpp.

* [@http://svn.boost.org/trac/boost/ticket/9041 #9041] Boost.Thread DSO's may need to link with Boost.Atomic.

* [@http://svn.boost.org/trac/boost/ticket/9048 #9048] boost::scoped_thread useless ctor with variadic template arguments.

* [@http://svn.boost.org/trac/boost/ticket/9079 #9079] Condition variable will wait forever for some timepoint values (Win).

[heading Version 4.1.0 - boost 1.54]

[*New Features:]

* [@http://svn.boost.org/trac/boost/ticket/7285 #7285] C++11 compliance: Allow to pass movable arguments for call_once.

* [@http://svn.boost.org/trac/boost/ticket/7445 #7445] Async: Add future<>.then

* [@http://svn.boost.org/trac/boost/ticket/7449 #7449] Synchro: Add a synchronized value class

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/4878 #4878] MinGW 4.5.0 undefined reference to bool interruptible_wait(detail::win32::handle handle_to_wait_for,detail::t imeout target_time).

* [@http://svn.boost.org/trac/boost/ticket/4882 #4882] Win32 shared_mutex does not handle timeouts correctly.

* [@http://svn.boost.org/trac/boost/ticket/5752 #5752] boost::call_once() is unreliable on some platforms

* [@http://svn.boost.org/trac/boost/ticket/6652 #6652] Boost.Thread shared_mutex.hpp:50:99: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]

* [@http://svn.boost.org/trac/boost/ticket/6843 #6843] [Intel C++] Compile Errors with '#include <atomic>'

* [@http://svn.boost.org/trac/boost/ticket/6966 #6966] future boost::future_category inconsistent dll linkage

* [@http://svn.boost.org/trac/boost/ticket/7720 #7720] exception lock_error while intensive locking/unlocking of mutex

* [@http://svn.boost.org/trac/boost/ticket/7755 #7755] Thread: deadlock with shared_mutex on Windows

* [@http://svn.boost.org/trac/boost/ticket/7980 #7980] Build error: msvc-11.0 and BOOST_THREAD_DONT_USE_DATETIME

* [@http://svn.boost.org/trac/boost/ticket/7982 #7982] pthread_delay_np() parm compile error on AIX

* [@http://svn.boost.org/trac/boost/ticket/8027 #8027] thread library fails to compile with Visual Studio 2003

* [@http://svn.boost.org/trac/boost/ticket/8070 #8070] prefer GetTickCount64 over GetTickCount

* [@http://svn.boost.org/trac/boost/ticket/8136 #8136] boost::this_thread::sleep_for() sleeps longer than it should in Windows

* [@http://svn.boost.org/trac/boost/ticket/8212 #8212] Boost thread compilation error on Solaris 10

* [@http://svn.boost.org/trac/boost/ticket/8237 #8237] fix documentation for 'thread_group'

* [@http://svn.boost.org/trac/boost/ticket/8239 #8239] barrier::wait() not marked as interruption_point

* [@http://svn.boost.org/trac/boost/ticket/8323 #8323] boost::thread::try_join_for/try_join_until may block indefinitely due to a combination of problems in Boost.Thread and Boost.Chrono

* [@http://svn.boost.org/trac/boost/ticket/8337 #8337] The internal representation of "std::string(this->code()->message())" escapes, but is destroyed when it exits scope.

* [@http://svn.boost.org/trac/boost/ticket/8371 #8371] C++11 once_flag enabled when constexpr is not available

* [@http://svn.boost.org/trac/boost/ticket/8422 #8422] Assertion in win32::WaitForSingleObject()

* [@http://svn.boost.org/trac/boost/ticket/8443 #8443] Header file inclusion order may cause crashes

* [@http://svn.boost.org/trac/boost/ticket/8451 #8451] Missing documented function 'boost::scoped_thread::joinable'

* [@http://svn.boost.org/trac/boost/ticket/8458 #8458] -DBOOST_THREAD_DONT_USE_CHRONO in thread.obj.rsp but not explicitly set

* [@http://svn.boost.org/trac/boost/ticket/8530 #8530] [Coverity] Unused variable thread_handle, uninitialized variable cond_mutex in thread/pthread/thread_data.hpp

* [@http://svn.boost.org/trac/boost/ticket/8550 #8550] static linking of Boost.Thread with an MFC-Dll

* [@http://svn.boost.org/trac/boost/ticket/8576 #8576] "sur parolle" should be "sur parole".

* [@http://svn.boost.org/trac/boost/ticket/8596 #8596] With C++0x enabled, boost::packaged_task stores a reference to function objects, instead of a copy.

* [@http://svn.boost.org/trac/boost/ticket/8626 #8626] Reintroduce BOOST_VERIFY on pthread_mutex_destroy return type

* [@http://svn.boost.org/trac/boost/ticket/8645 #8645] Typo in Strict lock definition

* [@http://svn.boost.org/trac/boost/ticket/8671 #8671] promise: set_..._at_thread_exit

* [@http://svn.boost.org/trac/boost/ticket/8672 #8672] future<>::then(void()) doesn't works

* [@http://svn.boost.org/trac/boost/ticket/8674 #8674] Futures as local named objects can't be returned with implicit move.

[heading Version 4.0.0 - boost 1.53]

[/

[*Breaking changes:]

[warning

BOOST_THREAD_VERSION==3 by default since Boost 1.53. So that all the deprecated features since 1.50 are not included by default. You can change this by setting the appropriated define (see Configuration section).

]

]

[*Deprecated features:]

[warning Deprecated features since boost 1.53 will be available only until boost 1.58.]

* C++11 compliance: packaged_task<R> is deprecated, use instead packaged_task<R()>.

See BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK and BOOST_THREAD_DONT_PROVIDE_SIGNATURE_PACKAGED_TASK

* [@http://svn.boost.org/trac/boost/ticket/7537 #7537] deprecate Mutex::scoped_lock and scoped_try_lock and boost::condition

[*New Features:]

* [@http://svn.boost.org/trac/boost/ticket/6270 #6270] c++11 compliance: Add thread constructor from movable callable and movable arguments

Provided when BOOST_THREAD_PROVIDES_VARIADIC_THREAD is defined (Default value from Boost 1.55):

See BOOST_THREAD_PROVIDES_VARIADIC_THREAD and BOOST_THREAD_DONT_PROVIDE_VARIADIC_THREAD.

* [@http://svn.boost.org/trac/boost/ticket/7279 #7279] C++11 compliance: Add noexcept in system related functions

* [@http://svn.boost.org/trac/boost/ticket/7280 #7280] C++11 compliance: Add promise::...at_thread_exit functions

* [@http://svn.boost.org/trac/boost/ticket/7281 #7281] C++11 compliance: Add ArgTypes to packaged_task template.

Provided when BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK is defined (Default value from Boost 1.55).

See BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK and BOOST_THREAD_DONT_PROVIDE_SIGNATURE_PACKAGED_TASK.

* [@http://svn.boost.org/trac/boost/ticket/7282 #7282] C++11 compliance: Add packaged_task::make_ready_at_thread_exit function

* [@http://svn.boost.org/trac/boost/ticket/7285 #7285] C++11 compliance: Allow to pass movable arguments for call_once

* [@http://svn.boost.org/trac/boost/ticket/7412 #7412] C++11 compliance: Add async from movable callable and movable arguments

Provided when BOOST_THREAD_PROVIDES_VARIADIC_THREAD and BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK are defined (Default value from Boost 1.55):

See BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK and BOOST_THREAD_DONT_PROVIDE_SIGNATURE_PACKAGED_TASK, BOOST_THREAD_PROVIDES_VARIADIC_THREAD and BOOST_THREAD_DONT_PROVIDE_VARIADIC_THREAD.

* [@http://svn.boost.org/trac/boost/ticket/7413 #7413] C++11 compliance: Add async when the launch policy is deferred.

* [@http://svn.boost.org/trac/boost/ticket/7414 #7414] C++11 compliance: future::get post-condition should be valid()==false.

* [@http://svn.boost.org/trac/boost/ticket/7422 #7422] Provide a condition variable with zero-overhead performance penality.

* [@http://svn.boost.org/trac/boost/ticket/7414 #7444] Async: Add make_future/make_shared_future.

* [@http://svn.boost.org/trac/boost/ticket/7540 #7540] Threads: Add a helper class that join a thread on destruction.

* [@http://svn.boost.org/trac/boost/ticket/7541 #7541] Threads: Add a thread wrapper class that joins on destruction.

* [@http://svn.boost.org/trac/boost/ticket/7575 #7575] C++11 compliance: A future created by async should "join" in the destructor.

* [@http://svn.boost.org/trac/boost/ticket/7587 #7587] Synchro: Add strict_lock and nested_strict_lock.

* [@http://svn.boost.org/trac/boost/ticket/7588 #7588] Synchro: Split the locks.hpp in several files to limit dependencies.

* [@http://svn.boost.org/trac/boost/ticket/7590 #7590] Synchro: Add lockable concept checkers based on Boost.ConceptCheck.

* [@http://svn.boost.org/trac/boost/ticket/7591 #7591] Add lockable traits that can be used with enable_if.

* [@http://svn.boost.org/trac/boost/ticket/7592 #7592] Synchro: Add a null_mutex that is a no-op and that is a model of UpgardeLockable.

* [@http://svn.boost.org/trac/boost/ticket/7593 #7593] Synchro: Add a externally_locked class.

* [@http://svn.boost.org/trac/boost/ticket/7590 #7594] Threads: Allow to disable thread interruptions.

[*Fixed Bugs:]

* [@http://svn.boost.org/trac/boost/ticket/5752 #5752] boost::call_once() is unreliable on some platforms

* [@http://svn.boost.org/trac/boost/ticket/7464 #7464] BOOST_TEST(n_alive == 1); fails due to race condition in a regression test tool.

* [@http://svn.boost.org/trac/boost/ticket/7657 #7657] Serious performance and memory consumption hit if condition_variable methods condition notify_one or notify_all is used repeatedly.

* [@http://svn.boost.org/trac/boost/ticket/7665 #7665] this_thread::sleep_for no longer uses steady_clock in thread.

* [@http://svn.boost.org/trac/boost/ticket/7668 #7668] thread_group::join_all() should check whether its threads are joinable.

* [@http://svn.boost.org/trac/boost/ticket/7669 #7669] thread_group::join_all() should catch resource_deadlock_would_occur.

* [@http://svn.boost.org/trac/boost/ticket/7671 #7671] Error including boost/thread.hpp header on iOS.

* [@http://svn.boost.org/trac/boost/ticket/7672 #7672] lockable_traits.hpp syntax error: "defined" token misspelled.

* [@http://svn.boost.org/trac/boost/ticket/7798 #7798] boost::future set_wait_callback thread safety issues.

* [@http://svn.boost.org/trac/boost/ticket/7808 #7808] Incorrect description of effects for this_thread::sleep_for and this_thread::sleep_until.

* [@http://svn.boost.org/trac/boost/ticket/7812 #7812] Returns: cv_status::no_timeout if the call is returning because the time period specified by rel_time has elapsed, cv_status::timeout otherwise.

* [@http://svn.boost.org/trac/boost/ticket/7874 #7874] compile warning: thread.hpp:342: warning: type attributes are honored only at type definition.

* [@http://svn.boost.org/trac/boost/ticket/7875 #7875] BOOST_THREAD_THROW_IF_PRECONDITION_NOT_SATISFIED should not be enabled by default.

* [@http://svn.boost.org/trac/boost/ticket/7882 #7882] wrong exception text from condition_variable::wait(unique_lock<mutex>&).

* [@http://svn.boost.org/trac/boost/ticket/7890 #7890] thread::do_try_join_until() is missing a return type.

[heading Version 3.1.0 - boost 1.52]

Deprecated Features:

Deprecated features since boost 1.50 available only until boost 1.55:

These deprecated features will be provided by default up to boost 1.52. If you don't want to include the deprecated features you could define BOOST_THREAD_DONT_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. Since 1.53 these features will not be included any more by default. Since this version, if you want to include the deprecated features yet you could define BOOST_THREAD_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. These deprecated features will be only available until boost 1.55, that is you have yet 1 year to move to the new features.

* Time related functions don't using the Boost.Chrono library, use the chrono overloads instead.

Breaking changes when BOOST_THREAD_VERSION==3 (Default value since Boost 1.53):

There are some new features which share the same interface but with different behavior. These breaking features are provided by default when BOOST_THREAD_VERSION is 3, but the user can however choose the version 2 behavior by defining the corresponding macro. As for the deprecated features, these broken features will be only available until boost 1.55.

* [@http://svn.boost.org/trac/boost/ticket/6229 #6229] Rename the unique_future to future following the c++11.

* [@http://svn.boost.org/trac/boost/ticket/6266 #6266] Breaking change: thread destructor should call terminate if joinable.

* [@http://svn.boost.org/trac/boost/ticket/6269 #6269] Breaking change: thread move assignment should call terminate if joinable.

New Features:

* [@http://svn.boost.org/trac/boost/ticket/2361 #2361] thread_specific_ptr: document nature of the key, complexity and rationale.

* [@http://svn.boost.org/trac/boost/ticket/4710 #4710] C++11 compliance: Missing async().

* [@http://svn.boost.org/trac/boost/ticket/7283 #7283] C++11 compliance: Add notify_all_at_thread_exit.

* [@http://svn.boost.org/trac/boost/ticket/7345 #7345] C++11 compliance: Add noexcept to recursive mutex try_lock.

Fixed Bugs:

* [@http://svn.boost.org/trac/boost/ticket/2797 #2797] Two problems with thread_specific_ptr.

* [@http://svn.boost.org/trac/boost/ticket/5274 #5274] failed to compile future.hpp with stlport 5.1.5 under msvc8.1, because of undefined class.

* [@http://svn.boost.org/trac/boost/ticket/5431 #5431] compile error in Windows CE 6.0(interlocked).

[/* [@http://svn.boost.org/trac/boost/ticket/5752 #5752] boost::call_once() is unreliable on some platforms.]

* [@http://svn.boost.org/trac/boost/ticket/5696 #5696] win32 detail::set_tss_data does nothing when tss_cleanup_function is NULL.

* [@http://svn.boost.org/trac/boost/ticket/6931 #6931] mutex waits forwever with Intel C++ Compiler XE 12.1.5.344 Build 20120612

* [@http://svn.boost.org/trac/boost/ticket/7045 #7045] Thread library does not automatically compile date_time.

* [@http://svn.boost.org/trac/boost/ticket/7173 #7173] wrong function name interrupt_point().

* [@http://svn.boost.org/trac/boost/ticket/7200 #7200] Unable to build boost.thread modularized.

* [@http://svn.boost.org/trac/boost/ticket/7220 #7220] gcc 4.6.2 warns about inline+dllimport functions.

* [@http://svn.boost.org/trac/boost/ticket/7238 #7238] this_thread::sleep_for() does not respond to interrupt().

* [@http://svn.boost.org/trac/boost/ticket/7245 #7245] Minor typos on documentation related to version 3.

* [@http://svn.boost.org/trac/boost/ticket/7272 #7272] win32/thread_primitives.hpp: (Unneccessary) Warning.

* [@http://svn.boost.org/trac/boost/ticket/7284 #7284] Clarify that there is no access priority between lock and shared_lock on shared mutex.

* [@http://svn.boost.org/trac/boost/ticket/7329 #7329] boost/thread/future.hpp does not compile on HPUX.

* [@http://svn.boost.org/trac/boost/ticket/7336 #7336] BOOST_THREAD_DONT_USE_SYSTEM doesn't work.

* [@http://svn.boost.org/trac/boost/ticket/7329 #7349] packaged_task holds reference to temporary.

* [@http://svn.boost.org/trac/boost/ticket/7350 #7350] allocator_destructor does not destroy object

* [@http://svn.boost.org/trac/boost/ticket/7360 #7360] Memory leak in pthread implementation of boost::thread_specific_ptr

* [@http://svn.boost.org/trac/boost/ticket/7370 #7370] Boost.Thread documentation

* [@http://svn.boost.org/trac/boost/ticket/7438 #7438] Segmentation fault in test_once regression test in group.join_all();

* [@http://svn.boost.org/trac/boost/ticket/7461 #7461] detail::win32::ReleaseSemaphore may be called with count_to_release equal to 0

* [@http://svn.boost.org/trac/boost/ticket/7499 #7499] call_once doesn't call even once

[heading Version 3.0.1 - boost 1.51]

Deprecated Features:

Deprecated features since boost 1.50 available only until boost 1.55:

These deprecated features will be provided by default up to boost 1.52. If you don't want to include the deprecated features you could define BOOST_THREAD_DONT_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. Since 1.53 these features will not be included any more by default. Since this version, if you want to include the deprecated features yet you could define BOOST_THREAD_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. These deprecated features will be only available until boost 1.55, that is you have 1 year and a half to move to the new features.

* Time related functions don't using the Boost.Chrono library, use the chrono overloads instead.

Breaking changes when BOOST_THREAD_VERSION==3:

There are some new features which share the same interface but with different behavior. These breaking features are provided by default when BOOST_THREAD_VERSION is 3, but the user can however choose the version 2 behavior by defining the corresponding macro. As for the deprecated features, these broken features will be only available until boost 1.55.

* [@http://svn.boost.org/trac/boost/ticket/6229 #6229] Rename the unique_future to future following the c++11.

* [@http://svn.boost.org/trac/boost/ticket/6266 #6266] Breaking change: thread destructor should call terminate if joinable.

* [@http://svn.boost.org/trac/boost/ticket/6269 #6269] Breaking change: thread move assignment should call terminate if joinable.

Fixed Bugs:

* [@http://svn.boost.org/trac/boost/ticket/4258 #4258] Linking with boost thread does not work on mingw/gcc 4.5.

* [@http://svn.boost.org/trac/boost/ticket/4885 #4885] Access violation in set_tss_data at process exit due to invalid assumption about TlsAlloc.

* [@http://svn.boost.org/trac/boost/ticket/6931 #6931] mutex waits forwever with Intel Compiler and /debug:parallel

* [@http://svn.boost.org/trac/boost/ticket/7044 #7044] boost 1.50.0 header missing.

* [@http://svn.boost.org/trac/boost/ticket/7052 #7052] Thread: BOOST_THREAD_PROVIDES_DEPRECATED_FEATURES_SINCE_V3_0_0 only masks thread::operator==, thread::operator!= forward declarations, not definitions.

* [@http://svn.boost.org/trac/boost/ticket/7066 #7066] An attempt to fix current_thread_tls_key static initialization order.

* [@http://svn.boost.org/trac/boost/ticket/7074 #7074] Multiply defined symbol boost::allocator_arg.

* [@http://svn.boost.org/trac/boost/ticket/7078 #7078] Trivial 64-bit warning fix on Windows for thread attribute stack size

* [@http://svn.boost.org/trac/boost/ticket/7089 #7089] BOOST_THREAD_WAIT_BUG limits functionality without solving anything

[/

#6787 boost::thread::sleep() hangs if system time is rolled back

#7045 Thread library does not automatically compile date_time

]

[heading Version 3.0.0 - boost 1.50]

Breaking changes when BOOST_THREAD_VERSION==3:

* [@http://svn.boost.org/trac/boost/ticket/6229 #6229] Breaking change: Rename the unique_future to future following the c++11.

* [@http://svn.boost.org/trac/boost/ticket/6266 #6266] Breaking change: thread destructor should call terminate if joinable.

* [@http://svn.boost.org/trac/boost/ticket/6269 #6269] Breaking change: thread move assignment should call terminate if joinable.

New Features:

* [@http://svn.boost.org/trac/boost/ticket/1850 #1850] Request for unlock_guard to compliment lock_guard.

* [@http://svn.boost.org/trac/boost/ticket/2637 #2637] Request for shared_mutex duration timed_lock and timed_lock_shared.

* [@http://svn.boost.org/trac/boost/ticket/2741 #2741] Proposal to manage portable and non portable thread attributes.

* [@http://svn.boost.org/trac/boost/ticket/3567 #3567] Request for shared_lock_guard.

* [@http://svn.boost.org/trac/boost/ticket/6194 #6194] Adapt to Boost.Move.

* [@http://svn.boost.org/trac/boost/ticket/6195 #6195] c++11 compliance: Provide the standard time related interface using Boost.Chrono.

* [@http://svn.boost.org/trac/boost/ticket/6217 #6217] Enhance Boost.Thread shared mutex interface following Howard Hinnant proposal.

* [@http://svn.boost.org/trac/boost/ticket/6224 #6224] c++11 compliance: Add the use of standard noexcept on compilers supporting them.

* [@http://svn.boost.org/trac/boost/ticket/6225 #6225] Add the use of standard =delete defaulted operations on compilers supporting them.

* [@http://svn.boost.org/trac/boost/ticket/6226 #6226] c++11 compliance: Add explicit bool conversion from locks.

* [@http://svn.boost.org/trac/boost/ticket/6228 #6228] Add promise constructor with allocator following the standard c++11.

* [@http://svn.boost.org/trac/boost/ticket/6230 #6230] c++11 compliance: Follows the exception reporting mechanism as defined in the c++11.

* [@http://svn.boost.org/trac/boost/ticket/6231 #6231] Add BasicLockable requirements in the documentation to follow c++11.

* [@http://svn.boost.org/trac/boost/ticket/6272 #6272] c++11 compliance: Add thread::id hash specialization.

* [@http://svn.boost.org/trac/boost/ticket/6273 #6273] c++11 compliance: Add cv_status enum class and use it on the conditions wait functions.

* [@http://svn.boost.org/trac/boost/ticket/6342 #6342] c++11 compliance: Adapt the one_flag to the c++11 interface.

* [@http://svn.boost.org/trac/boost/ticket/6671 #6671] upgrade_lock: missing mutex and release functions.

* [@http://svn.boost.org/trac/boost/ticket/6672 #6672] upgrade_lock:: missing constructors from time related types.

* [@http://svn.boost.org/trac/boost/ticket/6675 #6675] upgrade_lock:: missing non-member swap.

* [@http://svn.boost.org/trac/boost/ticket/6676 #6676] lock conversion should be explicit.

* Added missing packaged_task::result_type and packaged_task:: constructor with allocator.

* Added packaged_task::reset()

Fixed Bugs:

* [@http://svn.boost.org/trac/boost/ticket/2380 #2380] boost::move from lvalue does not work with gcc.

* [@http://svn.boost.org/trac/boost/ticket/2430 #2430] shared_mutex for win32 doesn't have timed_lock_upgrade.

* [@http://svn.boost.org/trac/boost/ticket/2575 #2575] Bug- Boost 1.36.0 on Itanium platform.

* [@http://svn.boost.org/trac/boost/ticket/3160 #3160] Duplicate tutorial code in boost::thread.

* [@http://svn.boost.org/trac/boost/ticket/4345 #4345] thread::id and joining problem with cascade of threads.

* [@http://svn.boost.org/trac/boost/ticket/4521 #4521] Error using boost::move on packaged_task (MSVC 10).

* [@http://svn.boost.org/trac/boost/ticket/4711 #4711] Must use implementation details to return move-only types.

* [@http://svn.boost.org/trac/boost/ticket/4921 #4921] BOOST_THREAD_USE_DLL and BOOST_THREAD_USE_LIB are crucial and need to be documented.

* [@http://svn.boost.org/trac/boost/ticket/5013 #5013] documentation: boost::thread: pthreas_exit causes terminate().

* [@http://svn.boost.org/trac/boost/ticket/5173 #5173] boost::this_thread::get_id is very slow.

* [@http://svn.boost.org/trac/boost/ticket/5351 #5351] interrupt a future get boost::unknown_exception.

* [@http://svn.boost.org/trac/boost/ticket/5516 #5516] Upgrade lock is not acquired when previous upgrade lock releases if another read lock is present.

* [@http://svn.boost.org/trac/boost/ticket/5990 #5990] shared_future<T>::get() has wrong return type.

* [@http://svn.boost.org/trac/boost/ticket/6174 #6174] packaged_task doesn't correctly handle moving results.

* [@http://svn.boost.org/trac/boost/ticket/6222 #6222] Compile error with SunStudio: unique_future move.

* [@http://svn.boost.org/trac/boost/ticket/6354 #6354] PGI: Compiler threading support is not turned on.

* [@http://svn.boost.org/trac/boost/ticket/6673 #6673] shared_lock: move assign doesn't works with c++11.

* [@http://svn.boost.org/trac/boost/ticket/6674 #6674] shared_mutex: try_lock_upgrade_until doesn't works.

* [@http://svn.boost.org/trac/boost/ticket/6908 #6908] Compile error due to unprotected definitions of _WIN32_WINNT and WINVER.

* [@http://svn.boost.org/trac/boost/ticket/6940 #6940] TIME_UTC is a macro in C11.

* [@http://svn.boost.org/trac/boost/ticket/6959 #6959] call of abs is ambiguous.

* Fix issue signaled on the ML with task_object(task_object const&) in presence of task_object(task_object &&)

[heading Version 2.1.1 - boost 1.49]

Fixed Bugs:

* [@http://svn.boost.org/trac/boost/ticket/2309 #2309] Lack of g++ symbol visibility support in Boost.Thread.

* [@http://svn.boost.org/trac/boost/ticket/2639 #2639] documentation should be extended(defer_lock, try_to_lock, ...).

* [@http://svn.boost.org/trac/boost/ticket/3639 #3639] Boost.Thread doesn't build with Sun-5.9 on Linux.

* [@http://svn.boost.org/trac/boost/ticket/3762 #3762] Thread can't be compiled with winscw (Codewarrior by Nokia).

* [@http://svn.boost.org/trac/boost/ticket/3885 #3885] document about mix usage of boost.thread and native thread api.

* [@http://svn.boost.org/trac/boost/ticket/3975 #3975] Incorrect precondition for promise::set_wait_callback().

* [@http://svn.boost.org/trac/boost/ticket/4048 #4048] thread::id formatting involves locale

* [@http://svn.boost.org/trac/boost/ticket/4315 #4315] gcc 4.4 Warning: inline ... declared as dllimport: attribute ignored.

* [@http://svn.boost.org/trac/boost/ticket/4480 #4480] OpenVMS patches for compiler issues workarounds.

* [@http://svn.boost.org/trac/boost/ticket/4819 #4819] boost.thread's documentation misprints.

* [@http://svn.boost.org/trac/boost/ticket/5423 #5423] thread issues with C++0x.

* [@http://svn.boost.org/trac/boost/ticket/5617 #5617] boost::thread::id copy ctor.

* [@http://svn.boost.org/trac/boost/ticket/5739 #5739] set-but-not-used warnings with gcc-4.6.

* [@http://svn.boost.org/trac/boost/ticket/5826 #5826] threads.cpp: resource leak on threads creation failure.

* [@http://svn.boost.org/trac/boost/ticket/5839 #5839] thread.cpp: ThreadProxy leaks on exceptions.

* [@http://svn.boost.org/trac/boost/ticket/5859 #5859] win32 shared_mutex constructor leaks on exceptions.

* [@http://svn.boost.org/trac/boost/ticket/6100 #6100] Compute hardware_concurrency() using get_nprocs() on GLIBC systems.

* [@http://svn.boost.org/trac/boost/ticket/6168 #6168] recursive_mutex is using wrong config symbol (possible typo).

* [@http://svn.boost.org/trac/boost/ticket/6175 #6175] Compile error with SunStudio.

* [@http://svn.boost.org/trac/boost/ticket/6200 #6200] patch to have condition_variable and mutex error better handle EINTR.

* [@http://svn.boost.org/trac/boost/ticket/6207 #6207] shared_lock swap compiler error on clang 3.0 c++11.

* [@http://svn.boost.org/trac/boost/ticket/6208 #6208] try_lock_wrapper swap compiler error on clang 3.0 c++11.

[heading Version 2.1.0 - Changes since boost 1.40]

The 1.41.0 release of Boost adds futures to the thread library. There are also a few minor changes.

[heading Changes since boost 1.35]

The 1.36.0 release of Boost includes a few new features in the thread library:

* New generic __lock_multiple_ref__ and __try_lock_multiple_ref__ functions for locking multiple mutexes at once.

* Rvalue reference support for move semantics where the compilers supports it.

* A few bugs fixed and missing functions added (including the serious win32 condition variable bug).

* `scoped_try_lock` types are now backwards-compatible with Boost 1.34.0 and previous releases.

* Support for passing function arguments to the thread function by supplying additional arguments to the __thread__ constructor.

* Backwards-compatibility overloads added for `timed_lock` and `timed_wait` functions to allow use of `xtime` for timeouts.

[heading Version 2.0.0 - Changes since boost 1.34]

Almost every line of code in __boost_thread__ has been changed since the 1.34 release of boost. However, most of the interface

changes have been extensions, so the new code is largely backwards-compatible with the old code. The new features and breaking

changes are described below.

[heading New Features]

* Instances of __thread__ and of the various lock types are now movable.

* Threads can be interrupted at __interruption_points__.

* Condition variables can now be used with any type that implements the __lockable_concept__, through the use of

`boost::condition_variable_any` (`boost::condition` is a `typedef` to `boost::condition_variable_any`, provided for backwards

compatibility). `boost::condition_variable` is provided as an optimization, and will only work with

`boost::unique_lock<boost::mutex>` (`boost::mutex::scoped_lock`).

* Thread IDs are separated from __thread__, so a thread can obtain it's own ID (using `boost::this_thread::get_id()`), and IDs can

be used as keys in associative containers, as they have the full set of comparison operators.

* Timeouts are now implemented using the Boost DateTime library, through a typedef `boost::system_time` for absolute timeouts, and

with support for relative timeouts in many cases. `boost::xtime` is supported for backwards compatibility only.

* Locks are implemented as publicly accessible templates `boost::lock_guard`, `boost::unique_lock`, `boost::shared_lock`, and

`boost::upgrade_lock`, which are templated on the type of the mutex. The __lockable_concept__ has been extended to include publicly

available __lock_ref__ and __unlock_ref__ member functions, which are used by the lock types.

[heading Breaking Changes]

The list below should cover all changes to the public interface which break backwards compatibility.

* __try_mutex__ has been removed, and the functionality subsumed into __mutex__. __try_mutex__ is left as a `typedef`,

but is no longer a separate class.

* __recursive_try_mutex__ has been removed, and the functionality subsumed into

__recursive_mutex__. __recursive_try_mutex__ is left as a `typedef`, but is no longer a separate class.

* `boost::detail::thread::lock_ops` has been removed. Code that relies on the `lock_ops` implementation detail will no longer work,

as this has been removed, as it is no longer necessary now that mutex types now have public __lock_ref__ and __unlock_ref__ member

functions.

* `scoped_lock` constructors with a second parameter of type `bool` are no longer provided. With previous boost releases,

``boost::mutex::scoped_lock some_lock(some_mutex,false);`` could be used to create a lock object that was associated with a mutex,

but did not lock it on construction. This facility has now been replaced with the constructor that takes a

`boost::defer_lock_type` as the second parameter: ``boost::mutex::scoped_lock some_lock(some_mutex,boost::defer_lock);``

* The `locked()` member function of the `scoped_lock` types has been renamed to __owns_lock_ref__.

* You can no longer obtain a __thread__ instance representing the current thread: a default-constructed __thread__ object is not

associated with any thread. The only use for such a thread object was to support the comparison operators: this functionality has

been moved to __thread_id__.

* The broken `boost::read_write_mutex` has been replaced with __shared_mutex__.

* __mutex__ is now never recursive. For Boost releases prior to 1.35 __mutex__ was recursive on Windows and not on POSIX platforms.

* When using a __recursive_mutex__ with a call to [cond_any_wait_link `boost::condition_variable_any::wait()`], the mutex is only

unlocked one level, and not completely. This prior behaviour was not guaranteed and did not feature in the tests.

[endsect]

[section:future Future]

The following features will be included in next releases.

# Add some minor features, in particular

* [@http://svn.boost.org/trac/boost/ticket/7589 #7589] Synchro: Add polymorphic lockables.

# Add some features based on C++ proposals, in particular

* [@http://svn.boost.org/trac/boost/ticket/8273 #8273] Synchro: Add externally locked streams.

* [@http://svn.boost.org/trac/boost/ticket/8514 #8514] Async: Add a thread_pool executor with work stealing.

# And some additional extensions related to futures as:

* [@http://svn.boost.org/trac/boost/ticket/8517 #8517] Async: Add a variadic shared_future::then.

[endsect]