ChangeLog

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