ChangeLog

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