ChangeLog

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