ChangeLog

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