ChangeLog

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