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Update changelog for 2.1.2-alpha
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Nick Mathewson
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190
ChangeLog
190
ChangeLog
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Changes in version 2.1.2-alpha (?? ??? 2012)
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Changes in version 2.1.2-alpha (18 Nov 2012)
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Libevent 2.1.2-alpha includes more portable for monotonic timers,
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refactors much of Libevent's internal and external infrastructure,
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closes some longstanding gaps in the interface, makde other
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improvements. Ths log below tries to organize features by rough area of
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effect. It omits a few commits which were pure bugfixes on other commits
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listed below. For more detail, see the git changelogs. For more
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insight, see the "whatsnew-2.1.txt" document included in the Libevent
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2.1.2-alpha distribution.
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Libevent 2.1.2-alpha also includes all changes made in 2.0.19-stable
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through 2.0.21-stable inclusive.
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Performance (core):
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o Replace pipe-based notification with EVFILT_USER where possible. This
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should make multithreaded programs on OSX and *BSD alert the main thread a
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little faster. (53a07fe)
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o Make th_base_lock nonrecursive. (9cd5acb)
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New/Changed API Functions:
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o New event_get_priority() function to return an event's priority (f90e255)
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o Add a bufferevent_get_priority() function (bd39554)
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o Add an event_base_loopcontinue() to tell Libevent to rescan for more
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events right away (7d6aa5e)
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o Add a new callback to get called on evbuffer_file_segment free
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(e9f8feb yangacer, 64051b9)
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o Expose event_base_foreach_event() as a public API. (84fd6d7 Roman
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Puls, 232055e, ffe1643)
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o Add an event_remove_timer() to remove timer on an event without
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deleting it (e3b2e08)
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o Make bufferevent_set_timeouts(bev, NULL, NULL) have plausible
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semantics (9dee36b)
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o Rename event_enable_lock_debuging() to ..._debugging(). (The old name
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should still work.) (07e132e)
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o Add missing implementation for event_enable_debug_logging (3b3e21d)
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PORTABLE MONOTONIC TIMERS:
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Libevent 2.1.2 includes internal support for monotonic timers on
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(nearly) all supported platforms, including Windows, and OSX. Libevent
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applications should now be more resilient to jumps forwards or backwards
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in the system clock. Also, on Linux systems with epoll, we now
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optionally support microsecond-level timeouts (whereas epoll only
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supports millisecond-precision timeouts).
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o Use mach_absolute_time() for monotonic clock support on OSX. (b8fd6f9)
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o Do not track use_monotonic field when is no monotonic clock (cb653a0)
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o EVENT_BASE_FLAG_PRECISE_TIMER indicates we want fine timer precision
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(ddd69d3)
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o On Linux, use CLOCK_MONOTONIC_COARSE by default (55780a7)
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o Implement a GetTickCount-based monotonic timer for Windows (d5e1d5a)
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o Refactor monotonic timer handling into a new type and set of
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functions; add a gettimeofday-based ratcheting implementation (f5e4eb0)
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o Add EVENT_PRECISE_TIMER environment var for selecting precise-but-slow
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timer (a2598ec)
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o Implement fast/precise monotonic clocks on Windows (2c47045)
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o Simple unit tests for monotonic timers (630f077)
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o Improve the monotonic-time unit test: make it check the step size (7428c78)
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o When PRECISE_TIMERS is set with epoll, use timerfd for microsecond
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precision (26c7582)
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o Split out time-related evutil functions into a new evutil_time.c (c419485)
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o Split out time-related prototypes into time-internal.h (71bca50)
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o Add evutil_time.obj to Makefile.nmake (0ba0683)
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o Avoid giving a spurious warning when timerfd support is unavailable
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(1aaf9f0 Dave Hart)
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o Make test_evutil_monotonic a little more tolerant (def3b83)
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o Avoid unused-var warning on systems with clock_gettime but without
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CLOCK_MONOTONIC_COARSE (9be5468)
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EVENT_BASE_ONCE LEAKS:
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If a callback added by event_base_once() is never invoked, Libevent no
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longer leaks internal memory.
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o Free dangling event_once objects on event_base_free() (c17dd59)
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o Add a unit test in which an event is created with event_base_once()
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but never fires (4343edf)
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TESTING SUPPORT, FIXES AND IMPROVEMENTS:
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Libevent now disables by default its unit tests that would touch the
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network, or that tend to fail on heavily-loaded systems. To re-enable
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them, invoke the ./test/regress program with the @all alias.
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o Simplify test.sh code significantly. (9b856fd Ross Lagerwall)
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o Make all tests that hit the network disabled by default (f2cea87)
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o Avoid a resource leak on error in http client benchmark (ea92fba)
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o Update to latest tinytest (911b4f0349377) (ef7c4f7)
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o Avoid (unlikely) overflow in bench_httpclient.c (5671033)
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o Shave 700 msec off the persistent_timeout_jump test (21205b8)
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o Check return value of write() in regress.c (c8009d2)
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o Make load-dependent monotonic timer tests off-by-default (2b6fe8b)
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o Add deferred_cb_skew to list of timing-dependent tests (34c8f31)
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o Avoid test -e; older shs don't have one. (f1bd938)
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o Fix renegotiation test to work around openssl 1.0.1 bug (c2f3086)
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o Fix a couple of compile warnings in the unit tests (5a9a014)
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MISC:
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o Change evutil_weakrand_() to avoid platform random() (e86af4b Nicholas
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Marriott, 3aa4415)
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INFRASTRUCTURE (Active-later events):
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As a simplification and optimization to Libevent's "deferred callback"
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logic (introduced in 2.0 to avoid callback recursion), Libevent now
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treats all of its deferrable callback types using the same logic it uses
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for active events. Now deferred events no longer cause priority
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inversion, no longer require special code to cancel them, and so on.
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o Refactor the callback part of an event into its own event_callback
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type (cba59e5)
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o Add "active later" event_callbacks to supersede deferred (745a63d)
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o event_base_assert_ok: check value of event_active_count for
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correctness (fec8bae)
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o Replace deferred_cbs with event_callback-based implementation. (ae2b84b)
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o Replace more deferred_cb names with event_callback (a4079aa)
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o Give event_base_process_active a single exit path (581b5be)
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o Restore our priority-inversion-prevention code with deferreds (c0e425a)
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o Refactor event_persist_closure: raise and extract some common logic
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(bec22b4)
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o Remove the unused bits from EVLIST_ALL (9889a3d)
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BUILD IMPROVEMENTS:
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Libevent 2.1.2-alpha modernizes Libevent's use of autotools, and makes
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numerous other build system. Parallel builds should be faster, and all
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builds should be quieter.
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o Split long lists in Makefile.am into one-item-per-line (2711cda)
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o Remove unnecessary code in configure.in. (e65914f Ross Lagerwall)
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o attempt to support OpenSSL in Makefile.nmake (eba0eb2 Patrick Pelletier)
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o Use newer syntax for autoconf/automake init (7d60ba8)
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o Enable silent build rules by default. Override with V=1 (7b18e5c)
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o Switch to non-recursive makefiles (7092f3b)
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o Rename subordinate Makefile.ams to include.am (6cdfeeb)
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o Make quiet build even quieter (371a123)
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o New --quiet option for event_rpcgen.py (aa59c1e)
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o Be quiet when making regress.gen.[ch] (607a8ff)
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o Fix handling of no-python case for nonrecursive make (1e3123d)
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o We now require automake 1.9 or later. Modernize! (b7f6e89)
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o Rename configure.in to configure.ac. (b3fea67 Ross Lagerwall)
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o Use correct openssl libs and includes in pkgconfig file (d70af27)
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o Use the same CFLAGS for openssl when building unit tests as with
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libevent (1d9d511)
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DOCUMENTATION
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o Note that make_base_notifiable should not be necessary (26ee5f9)
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o Be more clear that LEV_OPT_DEFERRED_ACCEPT has tricky prereqs (371efeb)
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o Add caveat to docs about bufferevent_free() with data in outbuf (6fab9ee)
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o Make it more clear that NOLOCK means "I promise, no multithreading"
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(9444524)
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o Fix a comment in test-fdleak after 077c7e949. (3881d8f Ross Lagerwall)
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o Make the Makefile.nmake warning slightly less dire (e7bf4c8)
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o Fix typo : events instead of evets (05f1aca Azat Khuzhin)
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o Additional comments about OPENSSL_DIR variable, prompted by Dave Hart
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(6bde2ef Patrick Pelletier)
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EVHTTP:
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o ignore LWS after field-content in headers (370a2c0 Artem Germanov)
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o Clean up rtrim implementation (aa59d80)
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o Remove trailing tabs in HTTP headers as well. (ac42519)
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o Remove internal ws from multiline http headers correctly (c6ff381)
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o Move evutil_rtrim_lws_ to evutil.c where it belongs (61b93af)
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o add evhttp_request_get_response_code_line (4f4d0c9 Jay R. Wren)
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o Use EVUTIL_SOCKET_ERROR() wrapper to save/restore errno in
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evhttp_connection_fail_ (7afbd60)
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o preserve errno in evhttp_connection_fail_ for inspection by the
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callback (36d0ee5 Patrick Pelletier)
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BUGFIXES:
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o Correctly handle running on a system where accept4 doesn't work. (9fbfe9b)
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o Avoid double-free on error in evbuffer_add_file. Found by
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coverity. (6a81b1f)
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o Fix another possible uninitialized read in dns regression tests. Found
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by coverity. (13525c5)
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o Add checks for functions in test-ratelim.c; found by Coverity (aa501e1)
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o Avoid memory leak in test_event_calloc unit test; found by coverity
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(92817a1)
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o Fix a shadowed variable in addfile_test_readcb; found by coverity
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(225344c)
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o Check return value when using LEV_OPT_DEFERRED_ACCEPT. Found by
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coverity (6487f63)
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o Prevent reference leak of bufferevent if getaddrinfo fails. (b757786
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Joachim Bauch)
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o Make event_base_getnpriorities work with old "implicit base" code
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(c46cb9c)
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o Simplify and correct evutil_open_closeonexec_ (0de587f)
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o Fix event_dlist definition when sys/queue not included (81b6209
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Derrick Pallas)
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Changes in version 2.1.1-alpha (4 Apr 2012)
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18
README
18
README
@ -92,20 +92,27 @@ fixing bugs:
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Lawnstein Chan
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Shuo Chen
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Ka-Hing Cheung
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Andrew Cox
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Paul Croome
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George Danchev
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Andrew Danforth
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Ed Day
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Christopher Davis
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Mike Davis
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Antony Dovgal
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Mihai Draghicioiu
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Alexander Drozdov
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Mark Ellzey
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Shie Erlich
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Leonid Evdokimov
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Juan Pablo Fernandez
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Christophe Fillot
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Mike Frysinger
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Remi Gacogne
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Artem Germanov
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Alexander von Gernler
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Artur Grabowski
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Diwaker Gupta
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Sebastian Hahn
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Dave Hart
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Greg Hazel
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@ -115,6 +122,7 @@ fixing bugs:
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Mark Heily
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Michael Herf
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Greg Hewgill
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Andrew Hochhaus
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Aaron Hopkins
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Tani Hosokawa
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Jamie Iles
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@ -122,6 +130,8 @@ fixing bugs:
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Evan Jones
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George Kadianakis
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Phua Keat
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Azat Khuzhin
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Alexander Klauer
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Kevin Ko
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Brian Koehmstedt
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Marko Kreen
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@ -136,6 +146,7 @@ fixing bugs:
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David Libenzi
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Yan Lin
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Moshe Litvin
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Simon Liu
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Mitchell Livingston
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Hagne Mahre
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Lubomir Marinov
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@ -157,8 +168,10 @@ fixing bugs:
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Jon Oberheide
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Phil Oleson
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Dave Pacheco
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Derrick Pallas
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Tassilo von Parseval
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Catalin Patulea
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Patrick Pelletier
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Simon Perreault
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Pierre Phaneuf
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Amarin Phaosawasdi
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@ -166,6 +179,7 @@ fixing bugs:
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Dimitre Piskyulev
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Pavel Plesov
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Jon Poland
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Roman Puls
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Nate R
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Robert Ransom
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Bert JW Regeer
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@ -192,11 +206,13 @@ fixing bugs:
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Colin Watt
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Zack Weinberg
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Jardel Weyrich
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Jay R. Wren
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Zack Weinberg
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Alejo
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Alex
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Taral
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propanbutan
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mmadia
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yangacer
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If we have forgotten your name, please contact us.
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