ChangeLog

   1 2013-01-09 Userspace RCU 0.6.9
   2         * API cleanup: use "uatomic_*" in cmm_smp_mb__ API
   3         * uatomic: add memory barrier API for and/or/add/sub/inc/sub
   4         * Fix uatomic sign cast
   5         * Discourage use of pthread_atfork() for call_rcu handlers
   6         * Fix call_rcu fork handling
   7         * test: fork handling
   8
   9 2012-09-11 Userspace RCU 0.6.8
  10         * Fix: call_rcu list corruption on teardown
  11
  12 2011-12-12 Userspace RCU 0.6.7
  13         * Add compat file for test urcu wfs
  14         * Add missing compat file for wfq test
  15         * hlist.h: Add missing stddef.h include for NULL
  16         * call_rcu: Add missing call_rcu_before_fork and
  17           call_rcu_after_fork_parent declarations
  18         * Describe autotools/libtool/automake version dependency
  19         * Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
  20         * Support older autotools
  21         * Apply autoupdate to configure.ac
  22         * Fix build for amd64 environment (for FreeBSD 8.2)
  23         * Add missing rcu_dereference_sym_bp
  24         * Install test scripts in the dist tarball
  25
  26 2011-11-03 Userspace RCU 0.6.6
  27         * qsbr vs call_rcu : remove exit assertion
  28         * Rename likely/unlikely to caa_likely/caa_unlikely
  29         * Reinsert missing test_urcu_*.c files (missing in rename)
  30         * rename test_qsbr to test_urcu_qsbr
  31         * urcu-pointer: fix rcu_set_pointer unset return value
  32         * Enhance API.txt documentation, add to Makefile as EXTRA_DIST
  33
  34 2011-09-29 Userspace RCU 0.6.5
  35         * call_rcu: Document call_rcu requirements
  36         * call_rcu: fix error handling of malloc error
  37         * urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
  38         * urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
  39         * urcu,call_rcu: avoid create call_rcu_data for child when unneed
  40         * urcu,defer_rcu: Make defer_rcu encoding more compact for marker
  41         * urcu_defer: Use cancellation flag instead of pthread_cancel()
  42         * urcu,call_rcu: protects call_rcu_data_list when remove node
  43         * Create default call rcu data upon per-cpu call-rcu teardown
  44         * powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
  45         * cmm: provide lightweight smp_rmb/smp_wmb on PPC
  46         * atomic: provide seq_cst semantics on powerpc
  47         * avoid leaking crdp for failed path
  48         * Return -EEXIST when the old cpu call_rcu_data has not been removed
  49         * protect writing to per_cpu_call_rcu_data[*]
  50         * wake up default call_rcu thread after we move the leftover callbacks
  51         * avoid memory leak in call_rcu_data_free()
  52         * urcu call_rcu: fix use after free()
  53         * use get_cpu_call_rcu_data() for get_call_rcu_data()
  54         * init maxcpus before use
  55         * call_rcu implementation: add missing static
  56         * Document QSBR interaction with mutexes
  57         * urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
  58         * urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
  59         * Pair all_cpu call_rcu create with free
  60         * QSBR: add missing wakeups in synchronize_rcu code
  61         * cmm: do not generate code for smp_rmb/smp_wmb on x86_64
  62         * cmm: let per-arch files provide cmm_smp_* barriers
  63         * Optimize caa_get_cycles() for PowerPC64
  64         * lfq/lfs tests: use call_rcu
  65         * list: Add cds_list_first_entry
  66         * rculfstack/queue: define _LGPL_SOURCE around static header include
  67         * Add __rcu annotation (unimplemented)
  68         * Fix incorrect fsf address in header files
  69         * wfstack: push returns prior stack emptiness state
  70         * Make lf stack push return if the stack was empty
  71         * Document caa_container_of
  72         * urcu-bp: do not call munmap for NULL registry at exit
  73         * urcu libraries can directly use the _LGPL_SOURCE wfqueue
  74         * rculfstack: document "push"
  75         * Add runall.sh to tarball
  76         * Fix build order of liburcu-cds-common
  77         * Fix missing check for SYS_membarrier in map header
  78         * urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
  79         * api: reimplement BUILD_BUG_ON in compiler.h
  80         * test api cleanup: remove unused primitives
  81         * put thread offline while waiting for the init flag
  82         * urcu: move private definitions to .c file
  83         * urcu-bp: move private definitions to .c file
  84         * urcu-qsbr: move private definitions to .c file
  85         * rcutorture: fix rcutorture-qsbr
  86         * wfqueue: fix type-incorrect assignment
  87         * Fix tests Makefile EXTRA_DIST to use api.h
  88         * Fix choice of default flavour in urcu/map/urcu.h
  89         * api: remove list/hlist
  90         * api: remove arch-specific files
  91         * api: make api_gcc.h a superset of the other headers
  92         * tests api: remove atomics
  93         * put thread offline while waiting for the init flag
  94         * urcu: move private definitions to .c file
  95         * urcu-bp: move private definitions to .c file
  96         * urcu-qsbr: move private definitions to .c file
  97         * rcutorture: fix rcutorture-qsbr
  98         * wfqueue: fix type-incorrect assignment
  99         * Use caa_ prefix for min() and max()
 100
 101 2011-07-21 Userspace RCU 0.6.4
 102         * uatomic: Fix ARM build errors in uatomic.
 103         * urcu tests: hold mutex across use of custom allocator.
 104         * Portability fixes to support FreeBSD 8.2.
 105
 106 2011-06-27 Userspace RCU 0.6.3
 107         * uatomic: Fix i386 compatibility build errors in uatomic.
 108
 109 2011-06-13 Userspace RCU 0.6.2
 110         * Fix build on powerpc.
 111
 112 2011-06-13 Userspace RCU 0.6.1
 113         * Add missing headers into release tarball:
 114             urcu-call-rcu-impl.h and urcu-defer-impl.h
 115
 116 2011-06-10 Userspace RCU 0.6.0
 117         * Added call_rcu() support, graciously contributed by Paul E. McKenney.
 118         * Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
 119           into a single .so: liburcu-cds.so to have a single header/shared
 120           object holding all concurrency-aware data containers. It provides
 121           support for RCU lists, queues and stacks at the moment.
 122         * liburcu 0.6.0 now allows linking a single application with multiple
 123           flavors of RCU. This required a library API change which is
 124           incompatible with older 0.5.x liburcu. The .so version number
 125           is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
 126         * Added "atfork" handling API, documented in README. Only useful for
 127           processes using fork() without following exec().
 128         * Renaming the following files, keeping the old files (producing a
 129           compiler warning):
 130             urcu/uatomic_arch.h -> urcu/uatomic.h
 131             urcu/urcu-futex.h -> urcu/futex.h
 132             urcu/urcu_ref.h -> urcu/ref.h
 133
 134 2011-03-04 Userspace RCU 0.5.4
 135          *  urcu-bp: Update fork() handling
 136
 137             Introduce
 138
 139             extern void rcu_bp_before_fork(void);
 140             extern void rcu_bp_after_fork_parent(void);
 141             extern void rcu_bp_after_fork_child(void);
 142
 143             to handle fork gracefully. These disable signals and hold
 144             the registry mutex across forks. (this flavor of the liburcu
 145             library ("bp" for "bulletproof") is mainly used by UST, the
 146             user-space tracer).
 147
 148 2011-03-03 Userspace RCU 0.5.3
 149         * Add support for older ARM single-CPU architecturess (pre-ARMv7)
 150           (thanks to Jason Wessel from WindRiver).
 151         * Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
 152         * Remove leftover list_t type from urcu/list.h (namespace cleanup).
 153         * urcu_defer: handle malloc error value.
 154         * Update README file to describe urcu interaction with fork() when not
 155         * followed
 156           by an exec() system call.
 157
 158 2010-11-18 Userspace RCU 0.5.2
 159         * Fix renaming error introduced in 0.5.0.
 160
 161 2010-11-18 Userspace RCU 0.5.1
 162         * Fix renaming error introduced in 0.5.0. (incomplete fix)
 163
 164 2010-11-18 Userspace RCU 0.5.0
 165         * Version 0.5.0 changes the API presented by memory model,
 166           architecture abstraction and data structure primitives in
 167           headers. The prefixes are, respectively:
 168             - cmm_ : Concurrent Memory Model
 169             - caa_ : Concurrent Architecture Abstraction
 170             - cds_ : Concurrent Data Structures
 171
 172 2010-03-04 Userspace RCU 0.4.2
 173         * Add generic uatomic ops support.
 174         * Bugfix in urcu-bp. (rare garbage collection bug occurring in
 175           multithreaded environment). Only affects urcu-bp users (UST).
 176
 177 2010-02-12 Userspace RCU 0.4.1
 178         * s390: compilation fix.
 179
 180 2010-01-30 Userspace RCU 0.4.0
 181         * API change: SIGURCU -> SIGRCU
 182         * API changes: standardize on rcu_ prefix.
 183         * API change: urcu_init -> rcu_init.
 184         * urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
 185           CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
 186           ((moving from URCU -> RCU).
 187         * library names changes: liburcu becomes the "default" version, using
 188           sys_membarrier() when available, and using liburcu-mb as a
 189           fallback.
 190         * The signal-based liburcu is renamed from liburcu to
 191           liburcu-signal. People previously using the signal-based
 192           "liburcu" will automatically be moved to the "default" liburcu
 193           version.
 194
 195 2009-11-16 Userspace RCU 0.3.1
 196         * Add support for sparcv9 32-bit build.
 197         * Update build system to use --host instead of --target.
 198
 199 2009-11-03 Userspace RCU 0.3.0
 200         * API change for the "deferred work" interface.
 201
 202 2009-10-14 Userspace RCU 0.2.3
 203         * Move to autotools.
 204         * Automated architecture detection, with i386 fallback.
 205         * Detect if NR_futex is on the system, fallback on portable
 206           alternatives.
 207         * Add configure mode for UP-only systems.
 208
 209 2009-10-02 Userspace RCU 0.2.2
 210         * Phases out rcu_publish_content() api.
 211         * Adds type checking to urcu-pointer.h pointer exchange primitives.
 212
 213 2009-10-02 Userspace RCU 0.2.1
 214         * small header dependency fix for rculist.h.
 215         * new "liburcu-bp.so" : "Bulletproof RCU", made especially for
 216           the UST userspace tracer. It's a library that sacrifices a bit
 217           of read-side performance for automatically monitoring thread
 218           creation/removal. See README for details.
 219
 220 2009-10-01 Userspace RCU 0.2
 221         * Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
 222           rcu_set_pointer.
 223
 224 2009-09-29 Userspace RCU 0.1
 225         * Initial release.