ChangeLog

   1 2014-03-08 Userspace RCU 0.7.12
   2         * Fix: move wait loop increment before first conditional block
   3
   4 2014-03-01 Userspace RCU 0.7.11
   5         * Fix: high cpu usage in synchronize_rcu with long RCU read-side C.S.
   6
   7 2014-02-28 Userspace RCU 0.7.10
   8         * Fix: urcu-bp interaction with threads vs constructors/destructors
   9         * Fix undefined NULL pointer arithmetic
  10         * Blacklist ARM gcc 4.8.0, 4.8.1, 4.8.2
  11         * rculfhash: document max_nr_buckets = 0
  12
  13 2013-11-12 Userspace RCU 0.7.9
  14         * tls-compat: fix comment typo
  15         * Keep ABI compatible with already compiled LGPL applications
  16         * Fix: tls-compat multi-lib conflict
  17         * gcc warning fixes: -Wsign-compare and -Wextra
  18         * Fix: urcu-qsbr: reversed logic on RCU_DEBUG
  19         * Fix: urcu-bp segfault in glibc pthread_kill()
  20         * Fix urcu-bp: don't move registry
  21         * Fix: compat futex duplicated lock and completion
  22         * Fix: i386 compat code duplicated mutex instances
  23         * Fix: urcu-bp: Bulletproof RCU arena resize bug
  24         * Fix: test_mutex.c uninitialized mutex
  25
  26 2013-09-06 Userspace RCU 0.7.8
  27         * Fix: hash table growth (for small tables) should be limited
  28         * Document build work-around on MacOS X
  29         * Fix tests: use of uninitialized variables
  30         * tests: add missing unsigned long casts to pthread_self()
  31
  32 2013-06-18 Userspace RCU 0.7.7
  33         * rculfhash: document destroy context limitation
  34         * Fix: Use a filled signal mask to disable all signals
  35         * Document: rculfhash destroy and resize side-effect in 0.7
  36         * Add "sparc" host cpu to configure.ac
  37         * Fix: tests/api.h use cpuset.h
  38         * Fix hurd-i386: move cpuset tests outside of sched_setaffinity conditional
  39         * Fix tests: finer-grained use of CPU_SET, CPU_ZERO and cpu_set_t
  40         * Test for CPU_SET
  41         * Fix build on architectures with HAVE_SCHED_GETCPU but without HAVE_SYSCONF
  42         * README: document that Clang 3.0 (based on LLVM 3.0) is supported
  43         * clang: silence "unused expression result" warning
  44         * rculfhash: add assertions on node alignment
  45         * uatomic: style fix
  46
  47 2013-01-09 Userspace RCU 0.7.6
  48         * Discourage use of pthread_atfork() for call_rcu handlers
  49         * Fix call_rcu fork handling
  50         * test: fork handling
  51         * Fix TLS detection: test with linker, add --disable-compiler-tls
  52         * Cleanup: cast pthread_self() return value to unsigned long
  53         * Fallback mechanism not working on platform where TLS is unsupported
  54
  55 2012-10-12 Userspace RCU 0.7.5
  56         * 19cf3ae Fix: call_rcu list corruption on teardown
  57         * Ensure that read-side functions meet 10-line LGPL criterion
  58         * tls-compat.h: document sigaltstack(2) limitation
  59         * urcu: add notice to URCU_TLS() for it is not strictly async-signal-safe
  60         * Document sigaltstack(2) limitation
  61         * Documentation: update LICENSE file
  62
  63 2012-08-27 Userspace RCU 0.7.4
  64         * rculfhash API documentation: document destroy RCU read-lock constraint
  65         * Fix: rculfhash should be offline while waiting for resize to complete
  66         * Add missing entry to gitignore
  67         * urcu: move busy-wait code and name it ___cds_wfq_node_sync_next()
  68         * urcu: fix compat_futex_noasync()
  69         * urcu: add hint to DEFINE_URCU_TLS() for compound types
  70         * Fix: CAA_BUILD_BUG_ON should refer to CAA_BUILD_BUG_ON_ZERO
  71         * Add MIPS support
  72         * Compatibility: remove bash-ismsm from test scripts
  73         * Fix inappropriate lib behavior: don't call exit()
  74         * Fix: re-enable compatibility with autoconf < 2.64
  75         * Fix c99 compatibility: use __asm__ and __volatile__ in public headers
  76         * Fix c99 compatibility: use __typeof__ instead of typeof in public headers
  77         * warning fix: tests urcutorture for NetBSD 5
  78
  79 2012-06-01 Userspace RCU 0.7.3
  80         * Fix tests: make dist lib dependency
  81         * Update README for OS supported, tests dependency
  82         * Add CodingStyle to tarball
  83         * Add coding style document
  84         * Test fix: test_perthreadlock uninitialized mutex
  85         * tests: support FreeBSD short "time" args
  86         * freebsd 8.2 fix: define MAP_ANONYMOUS for compatibility
  87
  88 2012-05-24 Userspace RCU 0.7.2
  89         * Fix library compatibility
  90
  91 2012-05-24 Userspace RCU 0.7.1
  92         * fix: uatomic_set return value compile fix for non-x86 arch.
  93
  94 2012-05-21 Userspace RCU 0.7.0
  95         * Cleanup: header comments coding style
  96         * Document uatomic operations
  97         * Update return value of "set" operations
  98         * Fix mremap wrapper for NetBSD 5
  99         * Use urcu/tls-compat.h
 100         * Implement urcu/tls-compat.h
 101         * Add TLS detection m4 macro
 102         * document concurrent data structures
 103         * documentation: refer to rcu-api.txt
 104         * Move API.txt to doc/rcu-api.txt, install in system doc/
 105         * rculfhash: document implied memory barriers
 106         * rculfhash: Ensure future-proof memory barrier semantic consistency
 107         * API cleanup: use "uatomic_*" in cmm_smp_mb__ API
 108         * uatomic: add memory barrier API for and/or/add/sub/inc/sub
 109         * rculfhash: add runhash.sh test script
 110         * rculfhash tests: add missing check
 111         * rculfhash: fix: race between replace and del operations
 112         * rculfhash: replace unneeded rcu_dereference by CMM_LOAD_SHARED
 113         * rculfhash: use do {} while (0) for dbg_printf()
 114         * rculfhash: cleanup typo
 115         * rculfhash: update API comments
 116         * rculfhash: update comments in implementation
 117         * rculfhash tests: add long hash chains tests
 118         * rculfhash tests: add uniqueness test
 119         * rculfhash test: print test name
 120         * rculfhash: stress requirement in documentation
 121         * rculfhash: fix typo
 122         * rculfhash tests: use array of callbacks to modularize
 123         * rculfhash tests: modularize tests
 124         * rculfhash: document ordering guarantees
 125         * rculfhash: document linearizability guarantees
 126         * rculfhash: update removal comment
 127         * Add missing files to .gitignore
 128         * Fix out-of-tree build
 129         * rculfhash: check malloc NULL pointer
 130         * Fix uatomic sign cast
 131         * Remove unused jhash.h file
 132         * Fix: use known license text, fix incorrect FSF address
 133         * Fix: add missing sched.h include in rculfhash.c
 134         * Allow tests to run on architectures without per-cpu call_rcu support
 135         * Hash table test: FreeBSD compatibility fix
 136         * tests: define _GNU_SOURCE instead of __USE_GNU
 137         * RCU lock-free hash table: implement cds_lfht_is_node_deleted()
 138         * Define _GNU_SOURCE to access CPU_ZERO() macro in uClibc
 139         * Install ChangeLog and README into system's doc
 140         * Fix AC_LANG_SOURCE usage: only takes one parameter
 141         * Fix autoconf futex check
 142         * configure.ac: Use AC_LANG_SOURCE for if else macros
 143         * Refresh autoconf files
 144         * Update gitignore
 145         * rculfhash: add comment about hash seed randomness within test program
 146         * readme: state correct GCC dependency for ARM
 147         * rculfhash: remove an invocation of bit_reverse_ulong() when adding
 148         * rculfhash: remove unneeded conversion
 149         * rculfhash: remove unneeded clear_flag()
 150         * cds_lfht_replace: add checks for old/new node hash/value match
 151         * rculfhash: use node instead of iter argument for deletion
 152         * rculfhash: number of logically removed nodes should not appear in API
 153         * Document that flags could be represented on 2 bits
 154         * Add missing REMOVAL_OWNER_FLAG comment to cds_lfht_node comment
 155         * _cds_lfht_del is not used for buckets anymore, remove parameter
 156         * rculfhash: Relax atomicity guarantees required by removal operation
 157         * remove unneeded "return;"
 158         * simplify the deletion for bucket node
 159         * Remove unneeded code
 160         * Cleanup DEFINE_RCU_FLAVOR()
 161         * Add cds_lfht_ prefix to fls_ulong, get_count_order_ulong, get_count_order_u32
 162         * Merge RCU Lock-Free Resizable Hash Table
 163
 164 2011-12-12 Userspace RCU 0.6.7
 165         * Add compat file for test urcu wfs
 166         * Add missing compat file for wfq test
 167         * hlist.h: Add missing stddef.h include for NULL
 168         * call_rcu: Add missing call_rcu_before_fork and
 169           call_rcu_after_fork_parent declarations
 170         * Describe autotools/libtool/automake version dependency
 171         * Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
 172         * Support older autotools
 173         * Apply autoupdate to configure.ac
 174         * Fix build for amd64 environment (for FreeBSD 8.2)
 175         * Add missing rcu_dereference_sym_bp
 176         * Install test scripts in the dist tarball
 177
 178 2011-11-03 Userspace RCU 0.6.6
 179         * qsbr vs call_rcu : remove exit assertion
 180         * Rename likely/unlikely to caa_likely/caa_unlikely
 181         * Reinsert missing test_urcu_*.c files (missing in rename)
 182         * rename test_qsbr to test_urcu_qsbr
 183         * urcu-pointer: fix rcu_set_pointer unset return value
 184         * Enhance API.txt documentation, add to Makefile as EXTRA_DIST
 185
 186 2011-09-29 Userspace RCU 0.6.5
 187         * call_rcu: Document call_rcu requirements
 188         * call_rcu: fix error handling of malloc error
 189         * urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
 190         * urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
 191         * urcu,call_rcu: avoid create call_rcu_data for child when unneed
 192         * urcu,defer_rcu: Make defer_rcu encoding more compact for marker
 193         * urcu_defer: Use cancellation flag instead of pthread_cancel()
 194         * urcu,call_rcu: protects call_rcu_data_list when remove node
 195         * Create default call rcu data upon per-cpu call-rcu teardown
 196         * powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
 197         * cmm: provide lightweight smp_rmb/smp_wmb on PPC
 198         * atomic: provide seq_cst semantics on powerpc
 199         * avoid leaking crdp for failed path
 200         * Return -EEXIST when the old cpu call_rcu_data has not been removed
 201         * protect writing to per_cpu_call_rcu_data[*]
 202         * wake up default call_rcu thread after we move the leftover callbacks
 203         * avoid memory leak in call_rcu_data_free()
 204         * urcu call_rcu: fix use after free()
 205         * use get_cpu_call_rcu_data() for get_call_rcu_data()
 206         * init maxcpus before use
 207         * call_rcu implementation: add missing static
 208         * Document QSBR interaction with mutexes
 209         * urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
 210         * urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
 211         * Pair all_cpu call_rcu create with free
 212         * QSBR: add missing wakeups in synchronize_rcu code
 213         * cmm: do not generate code for smp_rmb/smp_wmb on x86_64
 214         * cmm: let per-arch files provide cmm_smp_* barriers
 215         * Optimize caa_get_cycles() for PowerPC64
 216         * lfq/lfs tests: use call_rcu
 217         * list: Add cds_list_first_entry
 218         * rculfstack/queue: define _LGPL_SOURCE around static header include
 219         * Add __rcu annotation (unimplemented)
 220         * Fix incorrect fsf address in header files
 221         * wfstack: push returns prior stack emptiness state
 222         * Make lf stack push return if the stack was empty
 223         * Document caa_container_of
 224         * urcu-bp: do not call munmap for NULL registry at exit
 225         * urcu libraries can directly use the _LGPL_SOURCE wfqueue
 226         * rculfstack: document "push"
 227         * Add runall.sh to tarball
 228         * Fix build order of liburcu-cds-common
 229         * Fix missing check for SYS_membarrier in map header
 230         * urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
 231         * api: reimplement BUILD_BUG_ON in compiler.h
 232         * test api cleanup: remove unused primitives
 233         * put thread offline while waiting for the init flag
 234         * urcu: move private definitions to .c file
 235         * urcu-bp: move private definitions to .c file
 236         * urcu-qsbr: move private definitions to .c file
 237         * rcutorture: fix rcutorture-qsbr
 238         * wfqueue: fix type-incorrect assignment
 239         * Fix tests Makefile EXTRA_DIST to use api.h
 240         * Fix choice of default flavour in urcu/map/urcu.h
 241         * api: remove list/hlist
 242         * api: remove arch-specific files
 243         * api: make api_gcc.h a superset of the other headers
 244         * tests api: remove atomics
 245         * put thread offline while waiting for the init flag
 246         * urcu: move private definitions to .c file
 247         * urcu-bp: move private definitions to .c file
 248         * urcu-qsbr: move private definitions to .c file
 249         * rcutorture: fix rcutorture-qsbr
 250         * wfqueue: fix type-incorrect assignment
 251         * Use caa_ prefix for min() and max()
 252
 253 2011-07-21 Userspace RCU 0.6.4
 254         * uatomic: Fix ARM build errors in uatomic.
 255         * urcu tests: hold mutex across use of custom allocator.
 256         * Portability fixes to support FreeBSD 8.2.
 257
 258 2011-06-27 Userspace RCU 0.6.3
 259         * uatomic: Fix i386 compatibility build errors in uatomic.
 260
 261 2011-06-13 Userspace RCU 0.6.2
 262         * Fix build on powerpc.
 263
 264 2011-06-13 Userspace RCU 0.6.1
 265         * Add missing headers into release tarball:
 266             urcu-call-rcu-impl.h and urcu-defer-impl.h
 267
 268 2011-06-10 Userspace RCU 0.6.0
 269         * Added call_rcu() support, graciously contributed by Paul E. McKenney.
 270         * Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
 271           into a single .so: liburcu-cds.so to have a single header/shared
 272           object holding all concurrency-aware data containers. It provides
 273           support for RCU lists, queues and stacks at the moment.
 274         * liburcu 0.6.0 now allows linking a single application with multiple
 275           flavors of RCU. This required a library API change which is
 276           incompatible with older 0.5.x liburcu. The .so version number
 277           is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
 278         * Added "atfork" handling API, documented in README. Only useful for
 279           processes using fork() without following exec().
 280         * Renaming the following files, keeping the old files (producing a
 281           compiler warning):
 282             urcu/uatomic_arch.h -> urcu/uatomic.h
 283             urcu/urcu-futex.h -> urcu/futex.h
 284             urcu/urcu_ref.h -> urcu/ref.h
 285
 286 2011-03-04 Userspace RCU 0.5.4
 287          *  urcu-bp: Update fork() handling
 288
 289             Introduce
 290
 291             extern void rcu_bp_before_fork(void);
 292             extern void rcu_bp_after_fork_parent(void);
 293             extern void rcu_bp_after_fork_child(void);
 294
 295             to handle fork gracefully. These disable signals and hold
 296             the registry mutex across forks. (this flavor of the liburcu
 297             library ("bp" for "bulletproof") is mainly used by UST, the
 298             user-space tracer).
 299
 300 2011-03-03 Userspace RCU 0.5.3
 301         * Add support for older ARM single-CPU architecturess (pre-ARMv7)
 302           (thanks to Jason Wessel from WindRiver).
 303         * Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
 304         * Remove leftover list_t type from urcu/list.h (namespace cleanup).
 305         * urcu_defer: handle malloc error value.
 306         * Update README file to describe urcu interaction with fork() when not
 307         * followed
 308           by an exec() system call.
 309
 310 2010-11-18 Userspace RCU 0.5.2
 311         * Fix renaming error introduced in 0.5.0.
 312
 313 2010-11-18 Userspace RCU 0.5.1
 314         * Fix renaming error introduced in 0.5.0. (incomplete fix)
 315
 316 2010-11-18 Userspace RCU 0.5.0
 317         * Version 0.5.0 changes the API presented by memory model,
 318           architecture abstraction and data structure primitives in
 319           headers. The prefixes are, respectively:
 320             - cmm_ : Concurrent Memory Model
 321             - caa_ : Concurrent Architecture Abstraction
 322             - cds_ : Concurrent Data Structures
 323
 324 2010-03-04 Userspace RCU 0.4.2
 325         * Add generic uatomic ops support.
 326         * Bugfix in urcu-bp. (rare garbage collection bug occurring in
 327           multithreaded environment). Only affects urcu-bp users (UST).
 328
 329 2010-02-12 Userspace RCU 0.4.1
 330         * s390: compilation fix.
 331
 332 2010-01-30 Userspace RCU 0.4.0
 333         * API change: SIGURCU -> SIGRCU
 334         * API changes: standardize on rcu_ prefix.
 335         * API change: urcu_init -> rcu_init.
 336         * urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
 337           CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
 338           ((moving from URCU -> RCU).
 339         * library names changes: liburcu becomes the "default" version, using
 340           sys_membarrier() when available, and using liburcu-mb as a
 341           fallback.
 342         * The signal-based liburcu is renamed from liburcu to
 343           liburcu-signal. People previously using the signal-based
 344           "liburcu" will automatically be moved to the "default" liburcu
 345           version.
 346
 347 2009-11-16 Userspace RCU 0.3.1
 348         * Add support for sparcv9 32-bit build.
 349         * Update build system to use --host instead of --target.
 350
 351 2009-11-03 Userspace RCU 0.3.0
 352         * API change for the "deferred work" interface.
 353
 354 2009-10-14 Userspace RCU 0.2.3
 355         * Move to autotools.
 356         * Automated architecture detection, with i386 fallback.
 357         * Detect if NR_futex is on the system, fallback on portable
 358           alternatives.
 359         * Add configure mode for UP-only systems.
 360
 361 2009-10-02 Userspace RCU 0.2.2
 362         * Phases out rcu_publish_content() api.
 363         * Adds type checking to urcu-pointer.h pointer exchange primitives.
 364
 365 2009-10-02 Userspace RCU 0.2.1
 366         * small header dependency fix for rculist.h.
 367         * new "liburcu-bp.so" : "Bulletproof RCU", made especially for
 368           the UST userspace tracer. It's a library that sacrifices a bit
 369           of read-side performance for automatically monitoring thread
 370           creation/removal. See README for details.
 371
 372 2009-10-01 Userspace RCU 0.2
 373         * Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
 374           rcu_set_pointer.
 375
 376 2009-09-29 Userspace RCU 0.1
 377         * Initial release.