2.4.2 (2012-09-28)

• fix the stub for Lwt_unix.readdir
• change the default method for Lwt_glib.install (use the glib main loop by default: more portable)
• ignore invalid file descriptors returned by glib (like the emulation of select in glib does)
• use environment variables in discover.ml - use LIBRARY_PATH and C_INCLUDE_PATH for searching headers - allow to pass flags for a library in <LIB>_CLFAGS and <LIB>_LIBS
• add Lwt_unix.on_signal_full

2.4.1 (2012-08-22)

• Add Lwt_stream.on_terminate
• Fix Lwt_gc
• Fix stubs for get_credentials on *BSD

2.4.0 (2012-07-16)

• Reimplement Lwt_stream
  • much simpler and more efficient
  • do not use Weak
  • add bounded push streams
• Add Lwt.async
• Add Lwt_preemptive.run_in_main
• Implement Lwt_unix.get_credentials on MacOS X/OpenBSD
• Ensure that on_cancel functions are executed first
• Better implementation of Lwt.cancel with more tests
• Simplify the API for unix jobs
• Better handling of the master lock in libev stubs
• Windows fixes/updates:
  • pass -lws2_32 instead of ws2_32.lib if building with mingw
  • fix a bug causing Lwt_unix.read/write to block when a socket is not readable/writable
  • port Lwt_process and Lwt_unix.system to windows
• Compatibility with ocaml 4.00:
  • add O_SHARE_DELETE to Lwt_unix.open_flag
  • add -package compiler-libs.toplevel for files using Toploop
• Do not use module Sys for signal handling to avoid ocaml code to be called in a C thread
• Fix Lwt_unix.wrap_syscall: try instead of Lwt.catch
• Fix a dead-lock between lwt_unix_send_notification and lwt_unix_recv_notifications
• Fix #277: add a function to return the Ssl.socket of a Lwt_ssl.socket
• Fix problems with C libraries detection/linking

2.3.2 (2011-11-04)

• Add location informations in logs:
  • allow loggers to get the current location through local storage
  • pass current location to logging functions
  • pass the current location with the syntax extension
• Add Lwt.on_termination
• Add Lwt_unix.reinstall_signal_handler
• Add Lwt_io.flush_all
• Add assert_lwt keyword to the syntax extension
• Add Lwt.wrap
• Add Lwt_glib.iter and Lwt_glib.wakeup
• ocaml 3.13 ready
• Allow to compile without libev support
• Fix bugs in Lwt_io
• Better handling of forks
• Fix many problems on Windows

2.3.1 (2011-07-13)

• Fix building of documentation when using the tarball
• Add Lwt_unix.fsync and Lwt_unix.fdatasync
• Fix the stubs for Lwt_unix.send_msg when fd-passing is not available
• Add -lwt-sequence-strict option to the syntax extension
• Use a custom PRNG state for Lwt.choose and Lwt.pick
• Fix a display glitch when starting the toplevel
• Add Lwt_unix.fork which should now be used when one want to use Lwt in the child process
• Better implementation of Lwt_unix.readlink and Lwt_unix.gethostbyname, which fixes compilation on Hurd
• Add Lwt.wakeup_later and Lwt.wakeup_later_exn to be used when one need to do lot of nested wakeup, which fixes a buffer overflow in Lwt_mutex
• Fix Lwt_unix.abort and Lwt_unix.close (threads was never wakeup)
• Fix Lwt_throttle for correct timings
• Fix subtle use of cancel

2.3.0 (2011-04-12)

• Add an extensible system of engines to:
  • allow the user to replace libev by another event system, such as select
  • allow easier integration of external libraries supporting asynchronous operations
• Lots of improvements for windows:
  • use the ocaml select instead of libev by default on windows
  • make asynchronous operations on non-socket file descriptors such as pipes to work
  • make glib integration to work
• Better use of engines in Lwt_unix: now events are cached to minimize the amount of calls to epoll_ctl
• Use an eventfd when possible for notifications for faster delivery
• Add modules:
  • Lwt_sys: allow to test availability of extra features
  • Lwt_react: replace Lwt_event and Lwt_signal
• Allow to configure logging rules at runtime in Lwt_log
• Add match_lwt and while_lwt to the syntax extension
• Fixes:
  • syntax extension: handle "lwt ... = ... in ..." at toplevel
  • make the notification system fork-proof
  • fix an issue with stubs not raising correctly exceptions

2.2.1 (2011-01-26)

• Better interaction with Js_of_ocaml.
• Add functions Lwt.register_pause_notifier and Lwt.paused_count.

2.2.0 (2010-12-13)

• Bugfixes:
  • Fix a bug with cancellable threads causing Canceled exceptions to be raised randomly
  • Fix a fd-leak in Lwt_io.open_connection
• Lwt_unix now use libev instead of select
• Add thread local storage support to Lwt
• Add backtrace support to Lwt. Now Lwt exceptions can be recored by using the syntax extension with the -lwt-debug command line switch.
• Allow blocking system calls to be executed in parallels
• Change the type of many functions of Lwt_unix, which now return a Lwt thread
• Add functions Lwt_unix.readable and Lwt_unix.writable
• Add function Lwt_io.is_busy
• Add functions Lwt_event.delay and Lwt_signal.delay
• Add function Lwt_term.render_update
• Add function Lwt_ssl.embed_socket
• Add module Lwt_bytes defining operations on bigarrays instead of strings
• Use bigarrays in Lwt_io instead of strings for the internal buffer. Lwt_io.make now takes a function that uses a bigarray.
• Add module Lwt_switch

2.1.1 (2010-06-13)

• Many bugfixes, including:
  • buggy behaviour of cancellable threads
  • file descriptor leakage in Lwt_unix.accept_n
• Add Lwt.nchoose and Lwt.npick
• Use set_close_on_exec for fds created by Lwt_log
• Better implementation of lwtized react functions

2.1.0 (2010-04-19)

• Rename Lwt.select to Lwt.pick
• Removing module Lwt_monitor in favour of Lwt_mutex and new module Lwt_condition
• More react helpers:
  • Lwt_event.next
  • Lwt_event.limit and Lwt_signal.limit
  • Lwt_event.from
• Adding function Lwt_main.fast_yield
• Adding unit tests
• Optimisation of Lwt
• Adding module Lwt_log for logging
• Adding a camlp4 filter for remmoving logging statement or inlining tests
• Adding module Lwt_daemon
• Adding function Lwt_unix.recv_msg and Lwt_unix.send_msg
• Adding function Lwt_unix.wait4
• Adding function Lwt_io.establish_server
• Adding module Lwt_list
• Enhancement in Lwt_process, it now support redirections and timeouts
• Allow to use select on arbitrary high file descriptors
• More commands and features in Lwt_read_line:
  • Handle "undo" command
  • New controlable read-lines instances
  • More edition commands
  • Completion as you type
  • Backward search
• Enhancement in Lwt_term: more drawing functions and allow to put the terminal into drawing mode
• Optimisation of Lwt_stream
• Optimisation of Lwt_io.write_char and Lwt_io.read_char
• Bugfix of Lwt_stream: two parallel Lwt_stream.get returned the same value
• Bugfix in Lwt_unix.connect: it returned immediatly on EINPROGRESS
• Bugfixes in Lwt_glib: file descriptors were not monitored correctly

2.0.0 (2009-10-15)

• Adding modules:
  • Lwt_stream: lwt-aware version of the Stream module
  • Lwt_gc for using finalise without Lwt_unix.run
  • Lwt_io: a new implementation of buffered channels with more features and better handling of concurrent access
  • Lwt_text: implementation of text channels
  • Lwt_process: helpers to spawn processes and communicate with them
  • Lwt_main for abstracting the main loop and allowing replacement by a custom main loop
  • Lwt_glib for integration into the glib main event loop
  • Lwt_term for interaction with the terminal
  • Lwt_read_line for interactive user input
  • Lwt_monitor, Lwt_mvar: combined locks for synchronization with conditional variables for notification
  • Lwt_throttle for limiting rate of execution (e.g. for authentication procedure)
  • Lwt_sequence: mutable sequence of elements
  • Lwt_event, Lwt_signal: helpers for reactive programming with lwt
• Adding a syntax extension pa_lwt:
  • handles anonymous bind a >> b
  • adds syntactic sugar for catching errors (ticket #6)
  • adds syntactic sugar for parallel let-binding construction
  • adds syntactic sugar for for-like loops
• Top-level integration:
  • threads can runs while reading user input
  • line editing support
• New enhanced OCaml toplevel with some basic completion features
• Adding C stubs to reimplement Unix.read and Unix.write with assumption of non-blocking behaviour
• Adding more functions/helpers in Lwt
• Fixing memory leaks in Lwt.choose
• Bugfix in Lwt_chan.close_* (ticket #66)
• Separate the type of threads (covariant) from the type of thread wakeners (contravariant); the type of many functions related to Lwt.wait has been changed
• Add cancelable threads
• Unix-dependent part is now put in its own archive and findlib package.

1.1.0 (2008-06-25)

• Adding module Lwt_pool for creating pools (for example pools of connections)
• Adding a few functions in Lwt_chan
• Fixing bugs in Lwt_util.map_serial and Lwt_util.iter_serial
• Putting Lwt_preemptive, Lwt_lib and Lwt_ssl in separate libraries and findlib subpackages so that lwt.cma depends only on unix.cma.

1.0.0 (and before)

• See Ocsigen changelog