[urcu.git] / ChangeLog

2011-12-12 Userspace RCU 0.6.7
	* Add compat file for test urcu wfs
	* Add missing compat file for wfq test
	* hlist.h: Add missing stddef.h include for NULL
	* call_rcu: Add missing call_rcu_before_fork and
	  call_rcu_after_fork_parent declarations
	* Describe autotools/libtool/automake version dependency
	* Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
	* Support older autotools
	* Apply autoupdate to configure.ac
	* Fix build for amd64 environment (for FreeBSD 8.2)
	* Add missing rcu_dereference_sym_bp
	* Install test scripts in the dist tarball

2011-11-03 Userspace RCU 0.6.6
	* qsbr vs call_rcu : remove exit assertion
	* Rename likely/unlikely to caa_likely/caa_unlikely
	* Reinsert missing test_urcu_*.c files (missing in rename)
	* rename test_qsbr to test_urcu_qsbr
	* urcu-pointer: fix rcu_set_pointer unset return value
	* Enhance API.txt documentation, add to Makefile as EXTRA_DIST

2011-09-29 Userspace RCU 0.6.5
	* call_rcu: Document call_rcu requirements
	* call_rcu: fix error handling of malloc error
	* urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
	* urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
	* urcu,call_rcu: avoid create call_rcu_data for child when unneed
	* urcu,defer_rcu: Make defer_rcu encoding more compact for marker
	* urcu_defer: Use cancellation flag instead of pthread_cancel()
	* urcu,call_rcu: protects call_rcu_data_list when remove node
	* Create default call rcu data upon per-cpu call-rcu teardown
	* powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
	* cmm: provide lightweight smp_rmb/smp_wmb on PPC
	* atomic: provide seq_cst semantics on powerpc
	* avoid leaking crdp for failed path
	* Return -EEXIST when the old cpu call_rcu_data has not been removed
	* protect writing to per_cpu_call_rcu_data[*]
	* wake up default call_rcu thread after we move the leftover callbacks
	* avoid memory leak in call_rcu_data_free()
	* urcu call_rcu: fix use after free()
	* use get_cpu_call_rcu_data() for get_call_rcu_data()
	* init maxcpus before use
	* call_rcu implementation: add missing static
	* Document QSBR interaction with mutexes
	* urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
	* urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
	* Pair all_cpu call_rcu create with free
	* QSBR: add missing wakeups in synchronize_rcu code
	* cmm: do not generate code for smp_rmb/smp_wmb on x86_64
	* cmm: let per-arch files provide cmm_smp_* barriers
	* Optimize caa_get_cycles() for PowerPC64
	* lfq/lfs tests: use call_rcu
	* list: Add cds_list_first_entry
	* rculfstack/queue: define _LGPL_SOURCE around static header include
	* Add __rcu annotation (unimplemented)
	* Fix incorrect fsf address in header files
	* wfstack: push returns prior stack emptiness state
	* Make lf stack push return if the stack was empty
	* Document caa_container_of
	* urcu-bp: do not call munmap for NULL registry at exit
	* urcu libraries can directly use the _LGPL_SOURCE wfqueue
	* rculfstack: document "push"
	* Add runall.sh to tarball
	* Fix build order of liburcu-cds-common
	* Fix missing check for SYS_membarrier in map header
	* urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
	* api: reimplement BUILD_BUG_ON in compiler.h
	* test api cleanup: remove unused primitives
	* put thread offline while waiting for the init flag
	* urcu: move private definitions to .c file
	* urcu-bp: move private definitions to .c file
	* urcu-qsbr: move private definitions to .c file
	* rcutorture: fix rcutorture-qsbr
	* wfqueue: fix type-incorrect assignment
	* Fix tests Makefile EXTRA_DIST to use api.h
	* Fix choice of default flavour in urcu/map/urcu.h
	* api: remove list/hlist
	* api: remove arch-specific files
	* api: make api_gcc.h a superset of the other headers
	* tests api: remove atomics
	* put thread offline while waiting for the init flag
	* urcu: move private definitions to .c file
	* urcu-bp: move private definitions to .c file
	* urcu-qsbr: move private definitions to .c file
	* rcutorture: fix rcutorture-qsbr
	* wfqueue: fix type-incorrect assignment
	* Use caa_ prefix for min() and max()

2011-07-21 Userspace RCU 0.6.4
	* uatomic: Fix ARM build errors in uatomic.
	* urcu tests: hold mutex across use of custom allocator.
	* Portability fixes to support FreeBSD 8.2.

2011-06-27 Userspace RCU 0.6.3
	* uatomic: Fix i386 compatibility build errors in uatomic.

2011-06-13 Userspace RCU 0.6.2
	* Fix build on powerpc.

2011-06-13 Userspace RCU 0.6.1
	* Add missing headers into release tarball:
	    urcu-call-rcu-impl.h and urcu-defer-impl.h

2011-06-10 Userspace RCU 0.6.0
	* Added call_rcu() support, graciously contributed by Paul E. McKenney.
	* Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
	  into a single .so: liburcu-cds.so to have a single header/shared
	  object holding all concurrency-aware data containers. It provides
	  support for RCU lists, queues and stacks at the moment.
	* liburcu 0.6.0 now allows linking a single application with multiple
	  flavors of RCU. This required a library API change which is
	  incompatible with older 0.5.x liburcu. The .so version number
	  is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
	* Added "atfork" handling API, documented in README. Only useful for
	  processes using fork() without following exec().
	* Renaming the following files, keeping the old files (producing a
	  compiler warning):
	    urcu/uatomic_arch.h -> urcu/uatomic.h
	    urcu/urcu-futex.h -> urcu/futex.h
	    urcu/urcu_ref.h -> urcu/ref.h

2011-03-04 Userspace RCU 0.5.4
	 *  urcu-bp: Update fork() handling

	    Introduce

	    extern void rcu_bp_before_fork(void);
	    extern void rcu_bp_after_fork_parent(void);
	    extern void rcu_bp_after_fork_child(void);

	    to handle fork gracefully. These disable signals and hold
	    the registry mutex across forks. (this flavor of the liburcu
	    library ("bp" for "bulletproof") is mainly used by UST, the
	    user-space tracer).

2011-03-03 Userspace RCU 0.5.3
	* Add support for older ARM single-CPU architecturess (pre-ARMv7)
	  (thanks to Jason Wessel from WindRiver).
	* Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
	* Remove leftover list_t type from urcu/list.h (namespace cleanup).
	* urcu_defer: handle malloc error value.
	* Update README file to describe urcu interaction with fork() when not
	* followed
	  by an exec() system call.

2010-11-18 Userspace RCU 0.5.2
	* Fix renaming error introduced in 0.5.0.

2010-11-18 Userspace RCU 0.5.1
	* Fix renaming error introduced in 0.5.0. (incomplete fix)

2010-11-18 Userspace RCU 0.5.0
	* Version 0.5.0 changes the API presented by memory model,
	  architecture abstraction and data structure primitives in
	  headers. The prefixes are, respectively:
	    - cmm_ : Concurrent Memory Model
	    - caa_ : Concurrent Architecture Abstraction
	    - cds_ : Concurrent Data Structures

2010-03-04 Userspace RCU 0.4.2
	* Add generic uatomic ops support.
	* Bugfix in urcu-bp. (rare garbage collection bug occurring in
	  multithreaded environment). Only affects urcu-bp users (UST).

2010-02-12 Userspace RCU 0.4.1
	* s390: compilation fix.

2010-01-30 Userspace RCU 0.4.0
	* API change: SIGURCU -> SIGRCU
	* API changes: standardize on rcu_ prefix.
	* API change: urcu_init -> rcu_init.
	* urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
	  CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
	  ((moving from URCU -> RCU).
	* library names changes: liburcu becomes the "default" version, using
	  sys_membarrier() when available, and using liburcu-mb as a
	  fallback.
	* The signal-based liburcu is renamed from liburcu to
	  liburcu-signal. People previously using the signal-based
	  "liburcu" will automatically be moved to the "default" liburcu
	  version.

2009-11-16 Userspace RCU 0.3.1
	* Add support for sparcv9 32-bit build.
	* Update build system to use --host instead of --target.

2009-11-03 Userspace RCU 0.3.0
	* API change for the "deferred work" interface.

2009-10-14 Userspace RCU 0.2.3
	* Move to autotools.
	* Automated architecture detection, with i386 fallback.
	* Detect if NR_futex is on the system, fallback on portable
	  alternatives.
	* Add configure mode for UP-only systems.

2009-10-02 Userspace RCU 0.2.2
	* Phases out rcu_publish_content() api.
	* Adds type checking to urcu-pointer.h pointer exchange primitives.

2009-10-02 Userspace RCU 0.2.1
	* small header dependency fix for rculist.h.
	* new "liburcu-bp.so" : "Bulletproof RCU", made especially for
	  the UST userspace tracer. It's a library that sacrifices a bit
	  of read-side performance for automatically monitoring thread
	  creation/removal. See README for details.

2009-10-01 Userspace RCU 0.2
	* Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
	  rcu_set_pointer.

2009-09-29 Userspace RCU 0.1
	* Initial release.
Commit	Line	Data
c2f15ecd MD	1	2011-12-12 Userspace RCU 0.6.7
	2	* Add compat file for test urcu wfs
	3	* Add missing compat file for wfq test
	4	* hlist.h: Add missing stddef.h include for NULL
	5	* call_rcu: Add missing call_rcu_before_fork and
	6	call_rcu_after_fork_parent declarations
	7	* Describe autotools/libtool/automake version dependency
	8	* Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
	9	* Support older autotools
	10	* Apply autoupdate to configure.ac
	11	* Fix build for amd64 environment (for FreeBSD 8.2)
	12	* Add missing rcu_dereference_sym_bp
	13	* Install test scripts in the dist tarball
	14
530aab93 MD	15	2011-11-03 Userspace RCU 0.6.6
	16	* qsbr vs call_rcu : remove exit assertion
	17	* Rename likely/unlikely to caa_likely/caa_unlikely
	18	* Reinsert missing test_urcu_*.c files (missing in rename)
	19	* rename test_qsbr to test_urcu_qsbr
	20	* urcu-pointer: fix rcu_set_pointer unset return value
	21	* Enhance API.txt documentation, add to Makefile as EXTRA_DIST
	22
49472b9b MD	23	2011-09-29 Userspace RCU 0.6.5
	24	* call_rcu: Document call_rcu requirements
	25	* call_rcu: fix error handling of malloc error
	26	* urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
	27	* urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
	28	* urcu,call_rcu: avoid create call_rcu_data for child when unneed
	29	* urcu,defer_rcu: Make defer_rcu encoding more compact for marker
	30	* urcu_defer: Use cancellation flag instead of pthread_cancel()
	31	* urcu,call_rcu: protects call_rcu_data_list when remove node
	32	* Create default call rcu data upon per-cpu call-rcu teardown
	33	* powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
	34	* cmm: provide lightweight smp_rmb/smp_wmb on PPC
	35	* atomic: provide seq_cst semantics on powerpc
	36	* avoid leaking crdp for failed path
	37	* Return -EEXIST when the old cpu call_rcu_data has not been removed
	38	* protect writing to per_cpu_call_rcu_data[*]
	39	* wake up default call_rcu thread after we move the leftover callbacks
	40	* avoid memory leak in call_rcu_data_free()
	41	* urcu call_rcu: fix use after free()
	42	* use get_cpu_call_rcu_data() for get_call_rcu_data()
	43	* init maxcpus before use
	44	* call_rcu implementation: add missing static
	45	* Document QSBR interaction with mutexes
	46	* urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
	47	* urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
	48	* Pair all_cpu call_rcu create with free
	49	* QSBR: add missing wakeups in synchronize_rcu code
	50	* cmm: do not generate code for smp_rmb/smp_wmb on x86_64
	51	* cmm: let per-arch files provide cmm_smp_* barriers
	52	* Optimize caa_get_cycles() for PowerPC64
	53	* lfq/lfs tests: use call_rcu
	54	* list: Add cds_list_first_entry
	55	* rculfstack/queue: define _LGPL_SOURCE around static header include
	56	* Add __rcu annotation (unimplemented)
	57	* Fix incorrect fsf address in header files
	58	* wfstack: push returns prior stack emptiness state
	59	* Make lf stack push return if the stack was empty
	60	* Document caa_container_of
	61	* urcu-bp: do not call munmap for NULL registry at exit
	62	* urcu libraries can directly use the _LGPL_SOURCE wfqueue
	63	* rculfstack: document "push"
	64	* Add runall.sh to tarball
	65	* Fix build order of liburcu-cds-common
	66	* Fix missing check for SYS_membarrier in map header
	67	* urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
	68	* api: reimplement BUILD_BUG_ON in compiler.h
	69	* test api cleanup: remove unused primitives
	70	* put thread offline while waiting for the init flag
	71	* urcu: move private definitions to .c file
	72	* urcu-bp: move private definitions to .c file
	73	* urcu-qsbr: move private definitions to .c file
	74	* rcutorture: fix rcutorture-qsbr
	75	* wfqueue: fix type-incorrect assignment
	76	* Fix tests Makefile EXTRA_DIST to use api.h
	77	* Fix choice of default flavour in urcu/map/urcu.h
	78	* api: remove list/hlist
	79	* api: remove arch-specific files
	80	* api: make api_gcc.h a superset of the other headers
	81	* tests api: remove atomics
	82	* put thread offline while waiting for the init flag
	83	* urcu: move private definitions to .c file
	84	* urcu-bp: move private definitions to .c file
	85	* urcu-qsbr: move private definitions to .c file
	86	* rcutorture: fix rcutorture-qsbr
87	* wfqueue: fix type-incorrect assignment
88	* Use caa_ prefix for min() and max()
89
5d80fb65 MD	90	2011-07-21 Userspace RCU 0.6.4
	91	* uatomic: Fix ARM build errors in uatomic.
	92	* urcu tests: hold mutex across use of custom allocator.
	93	* Portability fixes to support FreeBSD 8.2.
	94
aa120cd0 MD	95	2011-06-27 Userspace RCU 0.6.3
	96	* uatomic: Fix i386 compatibility build errors in uatomic.
	97
	98	2011-06-13 Userspace RCU 0.6.2
	99	* Fix build on powerpc.
	100
	101	2011-06-13 Userspace RCU 0.6.1
	102	* Add missing headers into release tarball:
	103	urcu-call-rcu-impl.h and urcu-defer-impl.h
	104
	105	2011-06-10 Userspace RCU 0.6.0
	106	* Added call_rcu() support, graciously contributed by Paul E. McKenney.
	107	* Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
	108	into a single .so: liburcu-cds.so to have a single header/shared
	109	object holding all concurrency-aware data containers. It provides
	110	support for RCU lists, queues and stacks at the moment.
	111	* liburcu 0.6.0 now allows linking a single application with multiple
	112	flavors of RCU. This required a library API change which is
	113	incompatible with older 0.5.x liburcu. The .so version number
	114	is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
	115	* Added "atfork" handling API, documented in README. Only useful for
	116	processes using fork() without following exec().
	117	* Renaming the following files, keeping the old files (producing a
	118	compiler warning):
	119	urcu/uatomic_arch.h -> urcu/uatomic.h
	120	urcu/urcu-futex.h -> urcu/futex.h
	121	urcu/urcu_ref.h -> urcu/ref.h
	122
	123	2011-03-04 Userspace RCU 0.5.4
	124	* urcu-bp: Update fork() handling
	125
	126	Introduce
	127
	128	extern void rcu_bp_before_fork(void);
	129	extern void rcu_bp_after_fork_parent(void);
	130	extern void rcu_bp_after_fork_child(void);
	131
	132	to handle fork gracefully. These disable signals and hold
	133	the registry mutex across forks. (this flavor of the liburcu
	134	library ("bp" for "bulletproof") is mainly used by UST, the
	135	user-space tracer).
	136
	137	2011-03-03 Userspace RCU 0.5.3
	138	* Add support for older ARM single-CPU architecturess (pre-ARMv7)
	139	(thanks to Jason Wessel from WindRiver).
	140	* Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
	141	* Remove leftover list_t type from urcu/list.h (namespace cleanup).
	142	* urcu_defer: handle malloc error value.
	143	* Update README file to describe urcu interaction with fork() when not
	144	* followed
	145	by an exec() system call.
	146
	147	2010-11-18 Userspace RCU 0.5.2
	148	* Fix renaming error introduced in 0.5.0.
	149
	150	2010-11-18 Userspace RCU 0.5.1
	151	* Fix renaming error introduced in 0.5.0. (incomplete fix)
	152
	153	2010-11-18 Userspace RCU 0.5.0
	154	* Version 0.5.0 changes the API presented by memory model,
	155	architecture abstraction and data structure primitives in
	156	headers. The prefixes are, respectively:
	157	- cmm_ : Concurrent Memory Model
	158	- caa_ : Concurrent Architecture Abstraction
159	- cds_ : Concurrent Data Structures
160
161	2010-03-04 Userspace RCU 0.4.2
162	* Add generic uatomic ops support.
163	* Bugfix in urcu-bp. (rare garbage collection bug occurring in
164	multithreaded environment). Only affects urcu-bp users (UST).
165
166	2010-02-12 Userspace RCU 0.4.1
167	* s390: compilation fix.
168
169	2010-01-30 Userspace RCU 0.4.0
170	* API change: SIGURCU -> SIGRCU
171	* API changes: standardize on rcu_ prefix.
172	* API change: urcu_init -> rcu_init.
173	* urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
174	CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
175	((moving from URCU -> RCU).
176	* library names changes: liburcu becomes the "default" version, using
177	sys_membarrier() when available, and using liburcu-mb as a
178	fallback.
179	* The signal-based liburcu is renamed from liburcu to
180	liburcu-signal. People previously using the signal-based
181	"liburcu" will automatically be moved to the "default" liburcu
182	version.
183
184	2009-11-16 Userspace RCU 0.3.1
185	* Add support for sparcv9 32-bit build.
186	* Update build system to use --host instead of --target.
187
188	2009-11-03 Userspace RCU 0.3.0
189	* API change for the "deferred work" interface.
190
191	2009-10-14 Userspace RCU 0.2.3
192	* Move to autotools.
193	* Automated architecture detection, with i386 fallback.
194	* Detect if NR_futex is on the system, fallback on portable
195	alternatives.
196	* Add configure mode for UP-only systems.
197
198	2009-10-02 Userspace RCU 0.2.2
199	* Phases out rcu_publish_content() api.
200	* Adds type checking to urcu-pointer.h pointer exchange primitives.
201
202	2009-10-02 Userspace RCU 0.2.1
203	* small header dependency fix for rculist.h.
204	* new "liburcu-bp.so" : "Bulletproof RCU", made especially for
205	the UST userspace tracer. It's a library that sacrifices a bit
206	of read-side performance for automatically monitoring thread
207	creation/removal. See README for details.
208
209	2009-10-01 Userspace RCU 0.2
210	* Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
211	rcu_set_pointer.
212
213	2009-09-29 Userspace RCU 0.1
214	* Initial release.