ChangeLog

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