ChangeLog

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