Log message:
2014-11-04 Userspace RCU 0.8.6
        * Fix: silence gcc -Wextra warning
        * compiler: use __GNUC__ instead of the undefined __GNUC_MAJOR__
        * Fix: lfstack reversed empty/non-empty return value
        * lfstack: fix: add missing __cds_lfs_init

2014-10-21 Userspace RCU 0.8.5
        * Fix: preserve example files' timestamps when copying
        * rculfhash: remove duplicated code
        * rculfhash: handle pthread_create failures
        * rculfhash: fall back to single-threaded resize on calloc failure
        * x86: drop extra semi-colon in caa_cpu_relax
        * Fix: Use after free in rcu_barrier()
        * Fix: rcu_barrier(): uninitialized futex field
        * call_rcu threads should clear their PAUSED flag when they unpause
        * Fix: bring back dummy rcu_bp_exit symbol

Log message:
2014-03-08 Userspace RCU 0.8.4
        * Fix: move wait loop increment before first conditional block

2014-03-01 Userspace RCU 0.8.3
        * Fix: high cpu usage in synchronize_rcu with long RCU read-side C.S.

2014-02-28 Userspace RCU 0.8.2
        * Fix: out of tree build: doc/examples
        * Fix: out of tree build tests/common
        * tests/unit: use lib rather than source
        * automake: Rename INCLUDES to AM_CPPFLAGS (new name)
        * tests regressions: use lib rather than recompile from source
        * tests: use common lib rather than recompile compat sources
        * urcu tests: use lib rather than compile from source
        * urcu mb tests: use lib rather than recompile from source
        * urcu signal tests: use library rather than recompile source
        * tests: move yield debug to common test library
        * tests urcu bp: use lib rather than recompile source
        * test_urcu_defer: link on urcu lib rather than recompile source
        * tests/benchmark: use urcu qsbr lib rather than recompile from source
        * Pass the CC variable to the example Makefiles
        * Fix: urcu-bp interaction with threads vs constructors/destructors
        * Fix undefined NULL pointer arithmetic
        * Blacklist ARM gcc 4.8.0, 4.8.1, 4.8.2
        * rculfhash: document max_nr_buckets = 0

Log message:
2013-11-12 Userspace RCU 0.8.1
        * tls-compat: fix comment typo
        * Keep ABI compatible with already compiled LGPL applications
        * Fix: tls-compat multi-lib conflict
        * Use cross compiler for doc examples
        * gcc warning fixes: -Wsign-compare and -Wextra
        * Fix: urcu-qsbr: reversed logic on RCU_DEBUG
        * Fix: urcu-bp segfault in glibc pthread_kill()
        * Fix urcu-bp: don't move registry
        * Fix: compat futex duplicated lock and completion
        * Fix: i386 compat code duplicated mutex instances
        * Fix: urcu-bp: Bulletproof RCU arena resize bug
        * Fix: test_mutex.c uninitialized mutex

2013-09-06 Userspace RCU 0.8.0
        * Fix: hash table growth (for small tables) should be limited
        * Introduce URCU_INLINE_SMALL_FUNCTIONS
        * urcu signal: remove assertion on exit
        * hlist/rcuhlist update
        * rcuhlist: make pointer stores atomic
        * hlist, rcuhlist: cleanup coding style
        * rculist: ensure atomic updates of next pointers
        * rculist: implement cds_list_add_tail_rcu
        * rculist.h and list.h style cleanup
        * example makefile: add missing cd ..
        * Fix: examples Makefile on FreeBSD
        * Implement thread-id.h wrapper
        * Fix: don't build examples in static builds
        * Add QSBR minimal example
        * compiler.h: implement CAA_ARRAY_SIZE()
        * rcu barrier: handle OOM die urcu_die
        * Implement rcu_barrier()
        * Add MIPS to README
        * Update README
        * Fix: membarrier fallback symbol conflict
        * Fix: Use a filled signal mask to disable all signals
        * urcu-bp: introduce struct urcu_gp
        * Fix: struct urcu_gp broke multiflavor
        * wfstack: return whether pop is popping the last element
        * wfcqueue: return whether dequeue is dequeuing last element
        * urcu: avoid false sharing for rcu_gp_ctr
        * urcu: make the code of urcu-qsbr as normal urcu
        * rculfhash: detect if resize/destroy are called within RCU read-side C.S.
        * fix: rculfhash don't change qsbr online state
        * Add rcu_read_ongoing() API to each urcu flavor
        * Add "sparc" host cpu to configure.ac
        * futex: include syscall.h instead of sys/syscall.h
        * Add tab to output in order to allow easy nesting of tables.
        * Remove urcu-api-list.sh from dist tarball
        * Add urcu-api-list.sh script
        * list: implement cds_list_for_each_safe()
        * Fix build on architectures with HAVE_SCHED_GETCPU but without HAVE_SYSCONF
        * clang: silence "unused expression result" warning
        * rculfhash: add assertions on node alignment
        * Fix configure checks for Tile
        * uatomic: style fix
        * README: reorganize
        * Add compilation support for the TileGX architecture
        * wfstack: add nonblocking to _LGPL_SOURCE API
        * Discourage use of pthread_atfork() for call_rcu handlers
        * Fix call_rcu fork handling
        * rculfhash: add cds_lfht_replace to the write operations in the comments
        * urcu: fix comments for cds_list_for_each_prev()
        * urcu: remove the wrong comma
        * wfstack: implement nonblocking pop and next
        * wfstack: update comments about cds_wfs_empty/first being wait-free
        * wfstack API: rename cds_wfs_first_blocking to cds_wfs_first
        * urcu-mb/signal/membarrier: batch concurrent synchronize_rcu()
        * urcu-wait: move queue management code into urcu-wait.h
        * urcu-wait: move wait code into separate file
        * urcu-qsbr: batch concurrent synchronize_rcu()
        * urcu-bp: move quiescent threads to separate list
        * urcu-mb/signal/membarrier: move quiescent threads to separate list
        * urcu-qsbr: move offline threads to separate list
        * urcu-bp: improve 2-phase wait scheme
        * urcu-mb/signal/membarrier: improve 2-phase wait scheme
        * urcu-qsbr: improve 2-phase wait scheme
        * wfcqueue: implement mutex-free splice
        * urcu-call-rcu: use wait-free splice return value
        * wfcqueue: enqueue and splice return queue state
        * Fix: wfcqueue nonblocking dequeue
        * wfcqueue: Fix lock and unlock functions
        * urcu-qsbr: skip Q.S. reporting if already reported
        * Cleanup: cast pthread_self() return value to unsigned long
        * Fallback mechanism not working on platform where TLS is unsupported
        * Revert "Fix: cross-build: configure.ac should use --target, not \ 
--host"
        * Fix: cross-build: configure.ac should use --target, not --host
        * Fix static linking: add missing static for _defer_rcu
        * Fix static linking: fix symbol name namespaces
        * Fix static linking: add missing static to thr_defer
        * Fix static linking: add missing static
        * deprecation: fix build with gcc < 4.5
        * Comment fix: update associated LGPL header name
        * Update cds-api.txt following API deprecations
        * Deprecate wfqueue
        * Deprecate rculfstack
        * wfcqueue: introduce nonblocking API
        * lfstack: implement lock-free stack
        * rculfhash: add missing extern
        * Cleanup: fix cppcheck errors
        * wfcqueue: remove ancient comment
        * wfcqueue: clarify locking usage
        * Add wfcqueue header to cds.h
        * Fix: urcu-bp, urcu, urcu-qsbr should include wfcqueue
        * call_rcu: remove head field alignement, explain wfcqueue motivation
        * Fix urcu-call-rcu-impl.h: false-sharing
        * call_rcu: use wfcqueue, eliminate false-sharing
        * wfcqueue: implement concurrency-efficient queue
        * Ensure that read-side functions meet 10-line LGPL criterion
        * urcu: add notice to URCU_TLS() for it is not strictly async-signal-safe

Log message:
2013-11-12 Userspace RCU 0.7.9
 * tls-compat: fix comment typo
 * Keep ABI compatible with already compiled LGPL applications
 * Fix: tls-compat multi-lib conflict
 * gcc warning fixes: -Wsign-compare and -Wextra
 * Fix: urcu-qsbr: reversed logic on RCU_DEBUG
 * Fix: urcu-bp segfault in glibc pthread_kill()
 * Fix urcu-bp: don't move registry
 * Fix: compat futex duplicated lock and completion
 * Fix: i386 compat code duplicated mutex instances
 * Fix: urcu-bp: Bulletproof RCU arena resize bug
 * Fix: test_mutex.c uninitialized mutex

Log message:
Userspace RCU 0.7.8
        * Fix: hash table growth (for small tables) should be limited
        * Document build work-around on MacOS X
        * Fix tests: use of uninitialized variables
        * tests: add missing unsigned long casts to pthread_self()

Userspace RCU 0.7.7
        * rculfhash: document destroy context limitation
        * Fix: Use a filled signal mask to disable all signals
        * Document: rculfhash destroy and resize side-effect in 0.7
        * Add "sparc" host cpu to configure.ac
        * Fix: tests/api.h use cpuset.h
        * Fix hurd-i386: move cpuset tests outside of sched_setaffinity conditional
        * Fix tests: finer-grained use of CPU_SET, CPU_ZERO and cpu_set_t
        * Test for CPU_SET
        * Fix build on architectures with HAVE_SCHED_GETCPU but without HAVE_SYSCONF
        * README: document that Clang 3.0 (based on LLVM 3.0) is supported
        * clang: silence "unused expression result" warning
        * rculfhash: add assertions on node alignment
        * uatomic: style fix

Log message:
Userspace RCU 0.7.6
* Discourage use of pthread_atfork() for call_rcu handlers
* Fix call_rcu fork handling
* test: fork handling
* Fix TLS detection: test with linker, add --disable-compiler-tls
* Cleanup: cast pthread_self() return value to unsigned long
* Fallback mechanism not working on platform where TLS is unsupported

Log message:
Userspace RCU 0.7.5
* 19cf3ae Fix: call_rcu list corruption on teardown
* Ensure that read-side functions meet 10-line LGPL criterion
* tls-compat.h: document sigaltstack(2) limitation
* urcu: add notice to URCU_TLS() for it is not strictly async-signal-safe
* Document sigaltstack(2) limitation
* Documentation: update LICENSE file

Userspace RCU 0.7.4
* rculfhash API documentation: document destroy RCU read-lock constraint
* Fix: rculfhash should be offline while waiting for resize to complete
* Add missing entry to gitignore
* urcu: move busy-wait code and name it ___cds_wfq_node_sync_next()
* urcu: fix compat_futex_noasync()
* urcu: add hint to DEFINE_URCU_TLS() for compound types
* Fix: CAA_BUILD_BUG_ON should refer to CAA_BUILD_BUG_ON_ZERO
* Add MIPS support
* Compatibility: remove bash-ismsm from test scripts
* Fix inappropriate lib behavior: don't call exit()
* Fix: re-enable compatibility with autoconf < 2.64
* Fix c99 compatibility: use __asm__ and __volatile__ in public headers
* Fix c99 compatibility: use __typeof__ instead of typeof in public headers
* warning fix: tests urcutorture for NetBSD 5

Log message:
Drop superfluous PKG_DESTDIR_SUPPORT, "user-destdir" is default these days.

Log message:
liburcu is a userspace RCU (read-copy-update) library. This data
synchronization library provides read-side access which scales linearly
with the number of cores. It does so by allowing multiples copies of a
given data structure to live at the same time, and by monitoring the
data structure accesses to detect grace periods after which memory
reclamation is possible.