| [/ |
| / Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| / |
| / Distributed under the Boost Software License, Version 1.0. (See accompanying |
| / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| /] |
| |
| [section:history Revision History] |
| |
| [heading Asio 1.10.6 / Boost 1.58] |
| |
| * Ensured errors generated by Windows' `ConnectEx` function are mapped to their |
| portable equivalents ([ticket 10744]). |
| * Added new macro `BOOST_ASIO_DISABLE_CONNECTEX` to allow use of `ConnectEx` to |
| be explicitly disabled. |
| * Fixed a race condition in `windows::object_handle` when there are pending |
| wait operations on destruction ([ticket 10624]). |
| * Fixed IPv6 address parsing on FreeBSD, where a trailing scope ID would cause |
| conversion to fail with `EINVAL`. |
| * Worked around shared library visibility issues by ensuring Asio types use |
| default visibility ([ticket 9465], [ticket 11070]). |
| * Changed the SSL wrapper to call the password callback when loading an |
| in-memory key ([ticket 10828]). |
| * Fixed false SSL error reports by ensuring that the SSL error queue is cleared |
| prior to each operation. |
| * Fixed an `ssl::stream<>` bug that may result in spurious 'short read' errors. |
| * Removed a redundant null pointer check in the SSL engine ([ticket 10088]). |
| * Added options for disabling TLS v1.1 and v1.2 ([ticket 10690]). |
| * Removed use of deprecated OpenSSL function `ERR_remove_state`. |
| * Fixed detection of various C++11 features with Clang ([ticket 8835], |
| [ticket 10884]). |
| * Fixed detection of C++11 `std::addressof` with [^g++] ([ticket 10982]). |
| * Changed multicast test to treat certain `join_group` failures as non-fatal. |
| * Decoupled Asio unit tests from Boost.Test ([ticket 11116]). |
| * Changed the tutorial to use `std::endl` to ensure output is flushed. |
| * Fixed an unsigned integer overflow reported by Clang's integer sanitizer. |
| * Added support for move-only return types when using a `yield_context` object |
| with asynchronous operations. |
| * Changed `yield_context` to allow reentrant calls to the completion handler |
| from an initiating function. |
| * Updated detection of Windows Runtime to work with latest Windows SDK. |
| |
| [heading Asio 1.10.5 / Boost 1.57] |
| |
| * Fixed the [^kqueue] reactor so that it works on FreeBSD ([ticket 10606]). |
| * Fixed an issue in the [^kqueue] reactor which resulted in spinning when using |
| serial ports on Mac OS ([ticket 10496]). |
| * Fixed [^kqueue] reactor support for read-only file descriptors |
| ([ticket 10367]). |
| * Fixed a compile error when using the [^/dev/poll] reactor ([ticket 10350], |
| [ticket 10572]). |
| * Changed the Windows backend to use `WSASocketW`, as `WSASocketA` has been |
| deprecated ([ticket 10534]). |
| * Fixed some warnings reported by Visual C++ 2013 ([ticket 10376]). |
| * Fixed integer type used in the WinRT version of the byte-order conversion |
| functions ([ticket 10539]). |
| * Changed documentation to indicate that `use_future` and `spawn()` are not |
| made available when including the `asio.hpp` convenience header ([ticket |
| 10567]). |
| * Explicitly marked `asio::strand` as deprecated. Use |
| `asio::io_service::strand` instead. |
| |
| [heading Asio 1.10.4 / Boost 1.56] |
| |
| * Stopped using certain Winsock functions that are marked as deprecated in the |
| latest Visual C++ and Windows SDK. |
| * Fixed a shadow variable warning on Windows. |
| * Fixed a regression in the [^kqueue] backend that was introduced in Asio |
| 1.10.2. |
| * Added a workaround for building the unit tests with [^gcc] on AIX. |
| |
| [heading Asio 1.10.3] |
| |
| * Worked around a [^gcc] problem to do with anonymous enums ([ticket 10042]). |
| * Reverted the Windows `HANDLE` backend change to ignore `ERROR_MORE_DATA`. |
| Instead, the error will be propagated as with any other (i.e. in an |
| `error_code` or thrown as a `system_error`), and the number of bytes |
| transferred will be returned. For code that needs to handle partial messages, |
| the `error_code` overload should be used ([ticket 10034]). |
| * Fixed an off-by-one error in the `signal_set` implementation's signal |
| number check ([ticket 9324]). |
| * Changed the Windows IOCP backend to not assume that |
| `SO_UPDATE_CONNECT_CONTEXT` is defined ([ticket 10016]). |
| * Fixed a Windows-specific issue, introduced in Asio 1.10.2, by using |
| `VerifyVersionInfo` rather than `GetVersionEx`, as `GetVersionEx` has been |
| deprecated. |
| * Changed to use SSE2 intrinsics rather than inline assembly, to allow the |
| Cray compiler to work. |
| |
| [heading Asio 1.10.2] |
| |
| * Fixed `asio::spawn()` to work correctly with new Boost.Coroutine interface |
| ([ticket 9442], [ticket 9928]). |
| * Ensured that incomplete `asio::spawn()` coroutines are correctly unwound when |
| cleaned up by the `io_service` destructor ([ticket 9731]). |
| * Fixed delegation of continuation hook for handlers produced by |
| `io_service::wrap()` and `strand::wrap()` ([ticket 9741]). |
| * Changed the Windows I/O completion port backend to use `ConnectEx`, if |
| available, for connection-oriented IP sockets. |
| * Changed the `io_service` backend for non-Windows (and non-IOCP Windows) |
| platforms to use a single condition variable per `io_service` instance. |
| This addresses a potential race condition when `run_one()` is used from |
| multiple threads. |
| * Prevented integer overflow when computing timeouts based on some |
| `boost::chrono` and `std::chrono` clocks ([ticket 9662], [ticket 9778]). |
| * Made further changes to `EV_CLEAR` handling in the kqueue backend, to address |
| other cases where the `close()` system call may hang on Mac OS X. |
| * Fixed infinite recursion in implementation of |
| `resolver_query_base::flags::operator~` ([ticket 9548]). |
| * Made the `select` reactor more efficient on Windows for large numbers of |
| sockets ([ticket 9528]). |
| * Fixed a Windows-specific type-aliasing issue reported by [^gcc] ([ticket |
| 9550]). |
| * Prevented execution of compile-time-only buffer test to avoid triggering an |
| address sanitiser warning ([ticket 8295]). |
| * Disabled the `GetQueuedCompletionStatus` timeout workaround on recent |
| versions of Windows. |
| * Added support for string-based scope IDs when using link-local multicast |
| addresses. |
| * Changed IPv6 multicast group join to use the address's scope ID as the |
| interface, if an interface is not explicitly specified. |
| * Fixed multicast test failure on Mac OS X and the BSDs by using a link-local |
| multicast address. |
| * Various minor documentation improvements ([ticket 8295], [ticket 9605], |
| [ticket 9771]). |
| |
| [heading Asio 1.10.1 / Boost 1.55] |
| |
| * Implemented a limited port to Windows Runtime. This support requires that the |
| language extensions be enabled. Due to the restricted facilities exposed by |
| the Windows Runtime API, the port also comes with the following caveats: |
| * The core facilities such as the `io_service`, `strand`, buffers, composed |
| operations, timers, etc., should all work as normal. |
| * For sockets, only client-side TCP is supported. |
| * Explicit binding of a client-side TCP socket is not supported. |
| * The `cancel()` function is not supported for sockets. Asynchronous |
| operations may only be cancelled by closing the socket. |
| * Operations that use `null_buffers` are not supported. |
| * Only `tcp::no_delay` and `socket_base::keep_alive` options are supported. |
| * Resolvers do not support service names, only numbers. I.e. you must |
| use "80" rather than "http". |
| * Most resolver query flags have no effect. |
| * Fixed a regression (introduced in Boost 1.54) where, on some platforms, errors |
| from `async_connect` were not correctly propagated through to the completion |
| handler ([ticket 8795]). |
| * Fixed a Windows-specific regression (introduced in Boost 1.54) that occurs |
| when multiple threads are running an `io_service`. When the bug occurs, the |
| result of an asynchronous operation (error and bytes tranferred) is |
| incorrectly discarded and zero values used instead. For TCP sockets this |
| results in spurious end-of-file notifications ([ticket 8933]). |
| * Fixed a bug in handler tracking, where it was not correctly printing out some |
| handler IDs ([ticket 8808]). |
| * Fixed the comparison used to test for successful synchronous accept |
| operations so that it works correctly with unsigned socket descriptors |
| ([ticket 8752]). |
| * Ensured the signal number is correctly passed to the completion handler when |
| starting an `async_wait` on a signal that is already raised ([ticket 8738]). |
| * Suppressed a g++ 4.8+ warning about unused typedefs ([ticket 8980]). |
| * Enabled the move optimisation for handlers that use the default invocation |
| hook ([ticket 8624]). |
| * Clarified that programs must not issue overlapping `async_write_at` |
| operations ([ticket 8669]). |
| * Changed the Windows `HANDLE` backend to treat `ERROR_MORE_DATA` as a |
| non-fatal error when returned by `GetOverlappedResult` for a synchronous |
| read ([ticket 8722]). |
| * Visual C++ language extensions use `generic` as a keyword. Added a |
| workaround that renames the namespace to `cpp_generic` when those language |
| extensions are in effect. |
| * Fixed some asynchronous operations that missed out on getting `async_result` |
| support in Boost 1.54. In particular, the buffered stream templates have been |
| updated so that they adhere to current handler patterns ([ticket 9000], |
| [ticket 9001]). |
| * Enabled move support for Microsoft Visual Studio 2012 ([ticket 8959]). |
| * Added `use_future` support for Microsoft Visual Studio 2012. |
| * Removed a use of `std::min` in the Windows IOCP backend to avoid a |
| dependency on the `<algorithm>` header ([ticket 8758]). |
| * Eliminated some unnecessary handler copies. |
| * Fixed support for older versions of OpenSSL that do not provide the |
| `SSL_CTX_clear_options` function ([ticket 9273]). |
| * Fixed various minor and cosmetic issues in code and documentation |
| (including [ticket 8347], [ticket 8950], [ticket 8953], [ticket 8965], |
| [ticket 8997], [ticket 9230]). |
| |
| [heading Asio 1.10.0 / Boost 1.54] |
| |
| * Added new traits classes, `handler_type` and `async_result`, that allow the |
| customisation of the return type of an initiating function. |
| * Added the `asio::spawn()` function, a high-level wrapper for running |
| stackful coroutines, based on the Boost.Coroutine library. The `spawn()` |
| function enables programs to implement asynchronous logic in a synchronous |
| manner. For example: `size_t n = my_socket.async_read_some(my_buffer, yield);`. |
| For further information, see [link boost_asio.overview.core.spawn Stackful |
| Coroutines]. |
| * Added the `asio::use_future` special value, which provides first-class |
| support for returning a C++11 `std::future` from an asynchronous |
| operation's initiating function. For example: |
| `future<size_t> = my_socket.async_read_some(my_buffer, asio::use_future);`. |
| For further information, see [link boost_asio.overview.cpp2011.futures C++ |
| 2011 Support - Futures]. |
| * Promoted the stackless coroutine class and macros to be part of Asio's |
| documented interface, rather than part of the HTTP server 4 example. |
| For further information, see [link boost_asio.overview.core.coroutine |
| Stackless Coroutines]. |
| * Added a new handler hook called `asio_handler_is_continuation`. |
| Asynchronous operations may represent a continuation of the asynchronous |
| control flow associated with the current executing handler. The |
| `asio_handler_is_continuation` hook can be customised to return `true` if |
| this is the case, and Asio's implementation can use this knowledge to |
| optimise scheduling of the new handler. To cover common cases, Asio |
| customises the hook for strands, `spawn()` and composed asynchronous |
| operations. |
| * Added four new generic protocol classes, `generic::datagram_protocol`, |
| `generic::raw_protocol`, `generic::seq_packet_protocol` and |
| `generic::stream_protocol`, which implement the `Protocol` type |
| requirements, but allow the user to specify the address family (e.g. |
| `AF_INET`) and protocol type (e.g. `IPPROTO_TCP`) at runtime. |
| For further information, see [link |
| boost_asio.overview.networking.other_protocols Support for Other Protocols]. |
| * Added C++11 move constructors that allow the conversion of a socket (or |
| acceptor) into a more generic type. For example, an `ip::tcp::socket` can |
| be converted into a `generic::stream_protocol::socket` via move |
| construction. |
| For further information, see [link |
| boost_asio.overview.networking.other_protocols Support for Other Protocols]. |
| * Extended the `basic_socket_acceptor<>`'s `accept()` and `async_accept()` |
| functions to allow a new connection to be accepted directly into a socket |
| of a more generic type. For example, an `ip::tcp::acceptor` can be used to |
| accept into a `generic::stream_protocol::socket` object. |
| For further information, see [link |
| boost_asio.overview.networking.other_protocols Support for Other Protocols]. |
| * Moved existing examples into a C++03-specific directory, and added a new |
| directory for C++11-specific examples. A limited subset of the C++03 |
| examples have been converted to their C++11 equivalents. |
| * Various SSL enhancements. Thanks go to Nick Jones, on whose work these changes |
| are based. |
| * Added support for SSL handshakes with re-use of data already read from |
| the wire. New overloads of the `ssl::stream<>` class's `handshake()` and |
| `async_handshake()` functions have been added. These accept a |
| `ConstBufferSequence` to be used as initial input to the ssl engine for |
| the handshake procedure. |
| * Added support for creation of TLSv1.1 and TLSv1.2 `ssl::context` objects. |
| * Added a `set_verify_depth()` function to the `ssl::context` and |
| `ssl::stream<>` classes. |
| * Added the ability to load SSL certificate and key data from memory |
| buffers. New functions, `add_certificate_authority()`, |
| `use_certificate()`, `use_certificate_chain()`, `use_private_key()`, |
| `use_rsa_private_key()` and `use_tmp_dh()`, have been added to the |
| `ssl::context` class. |
| * Changed `ssl::context` to automatically disable SSL compression by |
| default. To enable, use the new `ssl::context::clear_options()` function, |
| as in `my_context.clear_options(ssl::context::no_compression)`. |
| * Fixed a potential deadlock in `signal_set` implementation. |
| * Fixed an error in acceptor example in documentation [ticket 8421]. |
| * Fixed copy-paste errors in waitable timer documentation [ticket 8602]. |
| * Added assertions to satisfy some code analysis tools [ticket 7739]. |
| * Fixed a malformed `#warning` directive [ticket 7939]. |
| * Fixed a potential data race in the Linux `epoll` implementation. |
| * Fixed a Windows-specific bug, where certain operations might generate an |
| `error_code` with an invalid (i.e. `NULL`) `error_category` [ticket 8613]. |
| * Fixed `basic_waitable_timer`'s underlying implementation so that it can |
| handle any `time_point` value without overflowing the intermediate duration |
| objects. |
| * Fixed a problem with lost thread wakeups that can occur when making |
| concurrent calls to `run()` and `poll()` on the same `io_service` object |
| [ticket 8354]. |
| * Fixed implementation of asynchronous connect operation so that it can cope |
| with spurious readiness notifications from the reactor [ticket 7961]. |
| * Fixed a memory leak in the `ssl::rfc2818_verification` class. |
| * Added a mechanism for disabling automatic Winsock initialisation [ticket |
| 3605]. See the header file [^boost/asio/detail/winsock_init.hpp] for details. |
| |
| [heading Asio 1.8.3 / Boost 1.53] |
| |
| * Fixed some 64-to-32-bit conversion warnings ([ticket 7459]). |
| * Fixed some small errors in documentation and comments ([ticket 7761]). |
| * Fixed an error in the example embedded in `basic_socket::get_option`'s |
| documentation ([ticket 7562]). |
| * Changed to use `long` rather than `int` for SSL_CTX options, to match OpenSSL |
| ([ticket 7209]). |
| * Changed to use `_snwprintf` to address a compile error due to the changed |
| `swprintf` signature in recent versions of MinGW ([ticket 7373]). |
| * Fixed a deadlock that can occur on Windows when shutting down a pool of |
| `io_service` threads due to running out of work ([ticket 7552]). |
| * Enabled the `noexcept` qualifier for error categories ([ticket 7797]). |
| * Changed UNIX domain socket example to treat errors from `accept` as non-fatal |
| ([ticket 7488]). |
| * Added a small block recycling optimisation to improve default memory |
| allocation behaviour. |
| |
| [heading Asio 1.8.2 / Boost 1.51] |
| |
| * Fixed an incompatibility between `ip::tcp::iostream` and C++11 |
| ([@https://svn.boost.org/trac/boost/ticket/7162 #7162]). |
| * Decorated GCC attribute names with underscores to prevent interaction |
| with user-defined macros |
| ([@https://svn.boost.org/trac/boost/ticket/6415 #6415]). |
| * Added missing `#include <cctype>`, needed for some versions of MinGW. |
| * Changed to use [^gcc]'s atomic builtins on ARM CPUs, when available |
| ([@https://svn.boost.org/trac/boost/ticket/7140 #7140]). |
| * Changed strand destruction to be a no-op, to allow strand objects to be |
| destroyed after their associated `io_service` has been destroyed. |
| * Added support for some newer versions of glibc which provide the |
| `epoll_create1()` function but always fail with `ENOSYS` |
| ([@https://svn.boost.org/trac/boost/ticket/7012 #7012]). |
| * Changed the SSL implementation to throw an exception if SSL engine |
| initialisation fails |
| ([@https://svn.boost.org/trac/boost/ticket/6303 #6303]). |
| * Fixed another regression in `buffered_write_stream` |
| ([@https://svn.boost.org/trac/boost/ticket/6310 #6310]). |
| * Implemented various minor performance improvements, primarily targeted at |
| Linux x86 and x86-64 platforms. |
| |
| [heading Asio 1.8.1 / Boost 1.50] |
| |
| * Changed the `epoll_reactor` backend to do lazy registration for `EPOLLOUT` |
| events. |
| * Fixed the `epoll_reactor` handling of out-of-band data, which was broken by |
| an incomplete fix in the last release. |
| * Changed Asio's SSL wrapper to respect OpenSSL's `OPENSSL_NO_ENGINE` feature |
| test `#define` ([@https://svn.boost.org/trac/boost/ticket/6432 #6432]). |
| * Fixed `windows::object_handle` so that it works with Windows compilers that |
| support C++11 move semantics (such as [^g++]). |
| * Improved the performance of strand rescheduling. |
| * Added support for [^g++] 4.7 when compiling in C++11 mode |
| ([@https://svn.boost.org/trac/boost/ticket/6620 #6620]). |
| * Fixed a problem where `signal_set` handlers were not being delivered when |
| the `io_service` was constructed with a `concurrency_hint` of 1 |
| ([@https://svn.boost.org/trac/boost/ticket/6657 #6657]). |
| |
| [heading Asio 1.8.0 / Boost 1.49] |
| |
| * Added a new class template `basic_waitable_timer` based around the C++11 clock |
| type requirements. It may be used with the clocks from the C++11 `<chrono>` |
| library facility or, if those are not available, Boost.Chrono. The typedefs |
| `high_resolution_timer`, `steady_timer` and `system_timer` may be used to |
| create timer objects for the standard clock types. |
| * Added a new `windows::object_handle` class for performing waits on Windows |
| kernel objects. Thanks go to Boris Schaeling for contributing substantially |
| to the development of this feature. |
| * On Linux, `connect()` can return EAGAIN in certain circumstances. Remapped |
| this to another error so that it doesn't look like a non-blocking operation |
| ([@https://svn.boost.org/trac/boost/ticket/6048 #6048]). |
| * Fixed a compile error on NetBSD |
| ([@https://svn.boost.org/trac/boost/ticket/6098 #6098]). |
| * Fixed deadlock on Mac OS X |
| ([@https://svn.boost.org/trac/boost/ticket/6275 #6275]). |
| * Fixed a regression in `buffered_write_stream` |
| ([@https://svn.boost.org/trac/boost/ticket/6310 #6310]). |
| * Fixed a non-paged pool "leak" on Windows when an `io_service` is repeatedly |
| run without anything to do |
| ([@https://svn.boost.org/trac/boost/ticket/6321 #6321]). |
| * Reverted earlier change to allow some speculative operations to be performed |
| without holding the lock, as it introduced a race condition in some |
| multithreaded scenarios. |
| * Fixed a bug where the second buffer in an array of two buffers may be ignored |
| if the first buffer is empty. |
| |
| [heading Asio 1.6.1 / Boost 1.48] |
| |
| * Implemented various performance improvements, including: |
| * Using thread-local operation queues in single-threaded use cases (i.e. when |
| `concurrency_hint` is 1) to eliminate a lock/unlock pair. |
| * Allowing some `epoll_reactor` speculative operations to be performed |
| without holding the lock. |
| * Improving locality of reference by performing an `epoll_reactor`'s I/O |
| operation immediately before the corresponding handler is called. This also |
| improves scalability across CPUs when multiple threads are running the |
| `io_service`. |
| * Specialising asynchronous read and write operations for buffer sequences |
| that are arrays (`boost::array` or `std::array`) of exactly two buffers. |
| * Fixed a compile error in the regex overload of `async_read_until` |
| ([@https://svn.boost.org/trac/boost/ticket/5688 #5688]). |
| * Fixed a Windows-specific compile error by explicitly specifying the |
| `signal()` function from the global namespace |
| ([@https://svn.boost.org/trac/boost/ticket/5722 #5722]). |
| * Changed the `deadline_timer` implementation so that it does not read the |
| clock unless the timer heap is non-empty. |
| * Changed the SSL stream's buffers' sizes so that they are large enough to hold |
| a complete TLS record ([@https://svn.boost.org/trac/boost/ticket/5854 #5854]). |
| * Fixed the behaviour of the synchronous `null_buffers` operations so that they |
| obey the user's non-blocking setting |
| ([@https://svn.boost.org/trac/boost/ticket/5756 #5756]). |
| * Changed to set the size of the select `fd_set` at runtime when using Windows. |
| * Disabled an MSVC warning due to const qualifier being applied to function type. |
| * Fixed a crash that occurs when using the Intel C++ compiler |
| ([@https://svn.boost.org/trac/boost/ticket/5763 #5763]). |
| * Changed the initialisation of the OpenSSL library so that it supports all |
| available algorithms. |
| * Fixed the SSL error mapping used when the session is gracefully shut down. |
| * Added some latency test programs. |
| * Clarified that a read operation ends when the buffer is full |
| ([@https://svn.boost.org/trac/boost/ticket/5999 #5999]). |
| * Fixed an exception safety issue in `epoll_reactor` initialisation |
| ([@https://svn.boost.org/trac/boost/ticket/6006 #6006]). |
| * Made the number of strand implementations configurable by defining |
| `BOOST_ASIO_STRAND_IMPLEMENTATIONS` to the desired number. |
| * Added support for a new `BOOST_ASIO_ENABLE_SEQUENTIAL_STRAND_ALLOCATION` flag |
| which switches the allocation of strand implementations to use a round-robin |
| approach rather than hashing. |
| * Fixed potential strand starvation issue that can occur when `strand.post()` |
| is used. |
| |
| [heading Asio 1.6.0 / Boost 1.47] |
| |
| * Added support for signal handling, using a new class called `signal_set`. |
| Programs may add one or more signals to the set, and then perform an |
| `async_wait()` operation. The specified handler will be called when one of |
| the signals occurs. The same signal number may be registered with multiple |
| `signal_set` objects, however the signal number must be used only with Asio. |
| Addresses [@https://svn.boost.org/trac/boost/ticket/2879 #2879]. |
| * Added handler tracking, a new debugging aid. When enabled by defining |
| `BOOST_ASIO_ENABLE_HANDLER_TRACKING`, Asio writes debugging output to the |
| standard error stream. The output records asynchronous operations and the |
| relationships between their handlers. It may be post-processed using the |
| included [^handlerviz.pl] tool to create a visual representation of the |
| handlers (requires GraphViz). |
| * Added support for timeouts on socket iostreams, such as `ip::tcp::iostream`. |
| A timeout is set by calling `expires_at()` or `expires_from_now()` to |
| establish a deadline. Any socket operations which occur past the deadline |
| will put the iostream into a bad state. |
| * Added a new `error()` member function to socket iostreams, for retrieving the |
| error code from the most recent system call. |
| * Added a new `basic_deadline_timer::cancel_one()` function. This function lets |
| you cancel a single waiting handler on a timer. Handlers are cancelled in |
| FIFO order. |
| * Added a new `transfer_exactly()` completion condition. This can be used to |
| send or receive a specified number of bytes even if the total size of the |
| buffer (or buffer sequence) is larger. |
| * Added new free functions `connect()` and `async_connect()`. These operations |
| try each endpoint in a list until the socket is successfully connected, and |
| are useful for creating TCP clients that work with both IPv4 and IPv6. |
| * Extended the `buffer_size()` function so that it works for buffer sequences |
| in addition to individual buffers. |
| * Added a new `buffer_copy()` function that can be used to copy the raw bytes |
| between individual buffers and buffer sequences. |
| * Added new non-throwing overloads of `read()`, `read_at()`, `write()` and |
| `write_at()` that do not require a completion condition. |
| * Added friendlier compiler errors for when a completion handler does not meet |
| the necessary type requirements. When C++0x is available (currently supported |
| for [^g++] 4.5 or later, and MSVC 10), `static_assert` is also used to |
| generate an informative error message. This checking may be disabled by |
| defining `BOOST_ASIO_DISABLE_HANDLER_TYPE_REQUIREMENTS`. |
| * Added a new, completely rewritten SSL implementation. The new implementation |
| compiles faster, shows substantially improved performance, and supports |
| custom memory allocation and handler invocation. It includes new API features |
| such as certificate verification callbacks and has improved error reporting. |
| The new implementation is source-compatible with the old for most uses. |
| However, if necessary, the old implementation may still be used by defining |
| `BOOST_ASIO_ENABLE_OLD_SSL`. |
| Addresses [@https://svn.boost.org/trac/boost/ticket/3702 #3702], |
| [@https://svn.boost.org/trac/boost/ticket/3958 #3958]. |
| * Changed the separate compilation support such that, to use Asio's SSL |
| capabilities, you should also include `boost/asio/ssl/impl/src.hpp` in one |
| source file in your program. |
| * Changed the SSL implementation to support build environments where SSL v2 is |
| explicitly disabled ([@https://svn.boost.org/trac/boost/ticket/5453 #5453]). |
| * Made the `is_loopback()`, `is_unspecified()` and `is_multicast()` functions |
| consistently available across the `ip::address`, `ip::address_v4` and |
| `ip::address_v6` classes |
| ([@https://svn.boost.org/trac/boost/ticket/3939 #3939]). |
| * Added new `non_blocking()` functions for managing the non-blocking behaviour |
| of a socket or descriptor. The `io_control()` commands named `non_blocking_io` |
| are now deprecated in favour of these new functions. |
| * Added new `native_non_blocking()` functions for managing the non-blocking |
| mode of the underlying socket or descriptor. These functions are intended to |
| allow the encapsulation of arbitrary non-blocking system calls as |
| asynchronous operations, in a way that is transparent to the user of the |
| socket object. The functions have no effect on the behaviour of the |
| synchronous operations of the socket or descriptor. |
| * Added the `io_control()` member function for socket acceptors |
| ([@https://svn.boost.org/trac/boost/ticket/3297 #3297]). |
| * Added a `release()` member function to posix descriptors. This function |
| releases ownership of the underlying native descriptor to the caller. |
| Addresses [@https://svn.boost.org/trac/boost/ticket/3900 #3900]. |
| * Added support for sequenced packet sockets (`SOCK_SEQPACKET`). |
| * Added a new `io_service::stopped()` function that can be used to determine |
| whether the `io_service` has stopped (i.e. a `reset()` call is needed prior |
| to any further calls to `run()`, `run_one()`, `poll()` or `poll_one()`). |
| * For consistency with the C++0x standard library, deprecated the `native_type` |
| typedefs in favour of `native_handle_type`, and the `native()` member |
| functions in favour of `native_handle()`. |
| * Added support for C++0x move construction and assignment to sockets, serial |
| ports, POSIX descriptors and Windows handles. |
| * Reduced the copying of handler function objects. |
| * Added support for C++0x move construction to further reduce (and in some |
| cases eliminate) copying of handler objects. |
| * Added support for the `fork()` system call. Programs that use `fork()` must |
| call `io_service.notify_fork()` at the appropriate times. Two new examples |
| have been added showing how to use this feature. Addresses |
| [@https://svn.boost.org/trac/boost/ticket/3238 #3238], |
| [@https://svn.boost.org/trac/boost/ticket/4162 #4162]. |
| * Cleaned up the handling of errors reported by the `close()` system call. In |
| particular, assume that most operating systems won't have `close()` fail with |
| `EWOULDBLOCK`, but if it does then set the blocking mode and restart the call. |
| If any other error occurs, assume the descriptor is closed. Addresses |
| [@https://svn.boost.org/trac/boost/ticket/3307 #3307]. |
| * Added new `asio::buffer()` overloads for `std::array`, when available. |
| * Changed the implementation to use the C++0x standard library templates |
| `array`, `shared_ptr`, `weak_ptr` and `atomic` when they are available, |
| rather than the Boost equivalents. |
| * Use C++0x variadic templates when available, rather than generating function |
| overloads using Boost.Preprocessor. |
| * Changed exception reporting to include the function name in exception `what()` |
| messages. |
| * Fixed insufficient initialisers warning with MinGW. |
| * Changed the `shutdown_service()` member functions to be private. |
| * Added archetypes for testing socket option functions. |
| * Changed the Boost.Asio examples so that they don't use Boost.Thread's |
| convenience header. Use the header file that is specifically for the |
| boost::thread class instead. |
| * Removed the dependency on OS-provided macros for the well-known IPv4 and IPv6 |
| addresses. This should eliminate annoying "missing braces around initializer" |
| warnings ([@https://svn.boost.org/trac/boost/ticket/3741 #3741]). |
| * Reduced the size of `ip::basic_endpoint<>` objects (such as |
| `ip::tcp::endpoint` and `ip::udp::endpoint`). |
| * Changed the reactor backends to assume that any descriptors or sockets added |
| using `assign()` may have been `dup()`-ed, and so require explicit |
| deregistration from the reactor |
| ([@https://svn.boost.org/trac/boost/ticket/4971 #4971]). |
| * Removed the deprecated member functions named `io_service()`. The |
| `get_io_service()` member functions should be used instead. |
| * Removed the deprecated typedefs `resolver_query` and `resolver_iterator` from |
| the `ip::tcp`, `ip::udp` and `ip::icmp` classes. |
| * Modified the `buffers_iterator<>` and `ip::basic_resolver_iterator` classes |
| so that the value_type typedefs are non-const byte types. |
| * Fixed warnings reported by g++'s [^-Wshadow] compiler option |
| ([@https://svn.boost.org/trac/boost/ticket/3905 #3905]). |
| * Added an explicit cast to convert the `FIONBIO` constant to int, to suppress |
| a compiler warning on some platforms |
| ([@https://svn.boost.org/trac/boost/ticket/5128 #5128]). |
| * Changed most examples to treat a failure by an accept operation as non-fatal |
| ([@https://svn.boost.org/trac/boost/ticket/5124 #5124]). |
| * Fixed an error in the [^tick_count_timer] example by making the duration type |
| signed. Previously, a wait on an already-passed deadline would not return for |
| a very long time ([@https://svn.boost.org/trac/boost/ticket/5418 #5418]). |
| |
| [heading Asio 1.4.9 / Boost 1.46.1] |
| |
| * `EV_ONESHOT` seems to cause problems on some versions of Mac OS X, with the |
| `io_service` destructor getting stuck inside the `close()` system call. |
| Changed the kqueue backend to use `EV_CLEAR` instead |
| ([@https://svn.boost.org/trac/boost/ticket/5021 #5021]). |
| * Fixed compile failures with some versions of [^g++] due to the use of |
| anonymous enums ([@https://svn.boost.org/trac/boost/ticket/4883 #4883]). |
| * Fixed a bug on kqueue-based platforms, where some system calls that |
| repeatedly fail with `EWOULDBLOCK` are not correctly re-registered with |
| kqueue. |
| * Changed `asio::streambuf` to ensure that its internal pointers are updated |
| correctly after the data has been modified using `std::streambuf` member |
| functions. |
| * Fixed a bug that prevented the linger socket option from working on platforms |
| other than Windows. |
| |
| [heading Asio 1.4.8 / Boost 1.46] |
| |
| * Fixed an integer overflow problem that occurs when |
| `ip::address_v4::broadcast()` is used on 64-bit platforms. |
| * Fixed a problem on older Linux kernels (where epoll is used without timerfd |
| support) that prevents timely delivery of deadline_timer handlers, after the |
| program has been running for some time |
| ([@https://svn.boost.org/trac/boost/ticket/5045 #5045]). |
| |
| [heading Asio 1.4.7 / Boost 1.45] |
| |
| * Fixed a problem on kqueue-based platforms where a `deadline_timer` may |
| never fire if the `io_service` is running in a background thread |
| ([@https://svn.boost.org/trac/boost/ticket/4568 #4568]). |
| * Fixed a const-correctness issue that prevented valid uses of |
| `has_service<>` from compiling |
| ([@https://svn.boost.org/trac/boost/ticket/4638 #4638]). |
| * Fixed MinGW cross-compilation |
| ([@https://svn.boost.org/trac/boost/ticket/4491 #4491]). |
| * Removed dependency on deprecated Boost.System functions |
| ([@https://svn.boost.org/trac/boost/ticket/4672 #4672]). |
| * Ensured `close()`\/`closesocket()` failures are correctly propagated |
| ([@https://svn.boost.org/trac/boost/ticket/4573 #4573]). |
| * Added a check for errors returned by `InitializeCriticalSectionAndSpinCount` |
| ([@https://svn.boost.org/trac/boost/ticket/4574 #4574]). |
| * Added support for hardware flow control on QNX |
| ([@https://svn.boost.org/trac/boost/ticket/4625 #4625]). |
| * Always use `pselect()` on HP-UX, if it is available |
| ([@https://svn.boost.org/trac/boost/ticket/4578 #4578]). |
| * Ensured handler arguments are passed as lvalues |
| ([@https://svn.boost.org/trac/boost/ticket/4744 #4744]). |
| * Fixed Windows build when thread support is disabled |
| ([@https://svn.boost.org/trac/boost/ticket/4680 #4680]). |
| * Fixed a Windows-specific problem where `deadline_timer` objects with expiry |
| times set more than 5 minutes in the future may never expire |
| ([@https://svn.boost.org/trac/boost/ticket/4745 #4745]). |
| * Fixed the `resolver` backend on BSD platforms so that an empty service name |
| resolves to port number `0`, as per the documentation |
| ([@https://svn.boost.org/trac/boost/ticket/4690 #4690]). |
| * Fixed read operations so that they do not accept buffer sequences of type |
| `const_buffers_1` ([@https://svn.boost.org/trac/boost/ticket/4746 #4746]). |
| * Redefined `Protocol` and `id` to avoid clashing with Objective-C++ keywords |
| ([@https://svn.boost.org/trac/boost/ticket/4191 #4191]). |
| * Fixed a `vector` reallocation performance issue that can occur when there are |
| many active `deadline_timer` objects |
| ([@https://svn.boost.org/trac/boost/ticket/4780 #4780]). |
| * Fixed the kqueue backend so that it compiles on NetBSD |
| ([@https://svn.boost.org/trac/boost/ticket/4662 #4662]). |
| * Fixed the socket `io_control()` implementation on 64-bit Mac OS X and BSD |
| platforms ([@https://svn.boost.org/trac/boost/ticket/4782 #4782]). |
| * Fixed a Windows-specific problem where failures from `accept()` are |
| incorrectly treated as successes |
| ([@https://svn.boost.org/trac/boost/ticket/4859 #4859]). |
| * Deprecated the separate compilation header `<boost/asio/impl/src.cpp>` in |
| favour of `<boost/asio/impl/src.hpp>` |
| ([@https://svn.boost.org/trac/boost/ticket/4560 #4560]). |
| |
| [heading Asio 1.4.6 / Boost 1.44] |
| |
| * Reduced compile times. (Note that some programs may need to add additional |
| `#include`s, e.g. if the program uses `boost::array` but does not explicitly |
| include `<boost/array.hpp>`.) |
| * Reduced the size of generated code. |
| * Refactored `deadline_timer` implementation to improve performance. |
| * Improved multiprocessor scalability on Windows by using a dedicated hidden |
| thread to wait for timers. |
| * Improved performance of `asio::streambuf` with `async_read()` and |
| `async_read_until()`. These read operations now use the existing capacity of |
| the `streambuf` when reading, rather than limiting the read to 512 bytes. |
| * Added optional separate compilation. To enable, add |
| `#include <boost/asio/impl/src.cpp>` to one source file in a program, then |
| build the program with `BOOST_ASIO_SEPARATE_COMPILATION` defined in the |
| project\/compiler settings. Alternatively, `BOOST_ASIO_DYN_LINK` may be |
| defined to build a separately-compiled Asio as part of a shared library. |
| * Added new macro `BOOST_ASIO_DISABLE_FENCED_BLOCK` to permit the disabling of |
| memory fences around completion handlers, even if thread support is enabled. |
| * Reworked timeout examples to better illustrate typical use cases. |
| * Ensured that handler arguments are passed as `const` types. |
| * Fixed incorrect parameter order in `null_buffers` variant of `async_send_to` |
| ([@https://svn.boost.org/trac/boost/ticket/4170 #4170]). |
| * Ensured `unsigned char` is used with `isdigit` in `getaddrinfo` emulation |
| ([@https://svn.boost.org/trac/boost/ticket/4201 #4201]). |
| * Fixed handling of very small but non-zero timeouts |
| ([@https://svn.boost.org/trac/boost/ticket/4205 #4205]). |
| * Fixed crash that occurred when an empty buffer sequence was passed to a |
| composed read or write operation. |
| * Added missing `operator+` overload in `buffers_iterator` |
| ([@https://svn.boost.org/trac/boost/ticket/4382 #4382]). |
| * Implemented cancellation of `null_buffers` operations on Windows. |
| |
| [heading Asio 1.4.5 / Boost 1.43] |
| |
| * Improved performance. |
| * Reduced compile times. |
| * Reduced the size of generated code. |
| * Extended the guarantee that background threads don't call user code to all |
| asynchronous operations |
| ([@https://svn.boost.org/trac/boost/ticket/3923 #3923]). |
| * Changed to use edge-triggered epoll on Linux. |
| * Changed to use `timerfd` for dispatching timers on Linux, when available. |
| * Changed to use one-shot notifications with kqueue on Mac OS X and BSD |
| platforms. |
| * Added a bitmask type `ip::resolver_query_base::flags` as per the TR2 proposal. |
| This type prevents implicit conversion from `int` to `flags`, allowing the |
| compiler to catch cases where users incorrectly pass a numeric port number as |
| the service name. |
| * Added `#define NOMINMAX` for all Windows compilers. Users can define |
| `BOOST_ASIO_NO_NOMINMAX` to suppress this definition |
| ([@https://svn.boost.org/trac/boost/ticket/3901 #3901]). |
| * Fixed a bug where 0-byte asynchronous reads were incorrectly passing an |
| `error::eof` result to the completion handler |
| ([@https://svn.boost.org/trac/boost/ticket/4023 #4023]). |
| * Changed the `io_control()` member functions to always call `ioctl` on the |
| underlying descriptor when modifying blocking mode |
| ([@https://svn.boost.org/trac/boost/ticket/3307 #3307]). |
| * Changed the resolver implementation to longer require the typedefs |
| `InternetProtocol::resolver_query` and `InternetProtocol::resolver_iterator`, |
| as neither typedef is part of the documented `InternetProtocol` requirements. |
| The corresponding typedefs in the `ip::tcp`, `ip::udp` and `ip::icmp` classes |
| have been deprecated. |
| * Fixed out-of-band handling for reactors not based on `select()`. |
| * Added new `BOOST_ASIO_DISABLE_THREADS` macro that allows Asio's threading |
| support to be independently disabled. |
| * Minor documentation improvements. |
| |
| [heading Asio 1.4.4 / Boost 1.42] |
| |
| * Added a new HTTP Server 4 example illustrating the use of stackless coroutines |
| with Asio. |
| * Changed handler allocation and invocation to use `boost::addressof` to get the |
| address of handler objects, rather than applying `operator&` directly |
| ([@https://svn.boost.org/trac/boost/ticket/2977 #2977]). |
| * Restricted MSVC buffer debugging workaround to 2008, as it causes a crash with |
| 2010 beta 2 ([@https://svn.boost.org/trac/boost/ticket/3796 #3796], |
| [@https://svn.boost.org/trac/boost/ticket/3822 #3822]). |
| * Fixed a problem with the lifetime of handler memory, where Windows needs the |
| `OVERLAPPED` structure to be valid until both the initiating function call |
| has returned and the completion packet has been delivered. |
| * Don't block signals while performing system calls, but instead restart the |
| calls if they are interrupted. |
| * Documented the guarantee made by strand objects with respect to order of |
| handler invocation. |
| * Changed strands to use a pool of implementations, to make copying of strands |
| cheaper. |
| * Ensured that kqueue support is enabled for BSD platforms |
| ([@https://svn.boost.org/trac/boost/ticket/3626 #3626]). |
| * Added a `boost_` prefix to the `extern "C"` thread entry point function |
| ([@https://svn.boost.org/trac/boost/ticket/3809 #3809]). |
| * In `getaddrinfo` emulation, only check the socket type (`SOCK_STREAM` or |
| `SOCK_DGRAM`) if a service name has been specified. This should allow the |
| emulation to work with raw sockets. |
| * Added a workaround for some broken Windows firewalls that make a socket |
| appear bound to 0.0.0.0 when it is in fact bound to 127.0.0.1. |
| * Applied a fix for reported excessive CPU usage under Solaris |
| ([@https://svn.boost.org/trac/boost/ticket/3670 #3670]). |
| * Added some support for platforms that use older compilers such as g++ 2.95 |
| ([@https://svn.boost.org/trac/boost/ticket/3743 #3743]). |
| |
| [heading Asio 1.4.3 / Boost 1.40] |
| |
| * Added a new ping example to illustrate the use of ICMP sockets. |
| * Changed the `buffered*_stream<>` templates to treat 0-byte reads and writes as |
| no-ops, to comply with the documented type requirements for `SyncReadStream`, |
| `AsyncReadStream`, `SyncWriteStream` and `AsyncWriteStream`. |
| * Changed some instances of the `throw` keyword to `boost::throw_exception()` to |
| allow Asio to be used when exception support is disabled. Note that the SSL |
| wrappers still require exception support |
| ([@https://svn.boost.org/trac/boost/ticket/2754 #2754]). |
| * Made Asio compatible with the OpenSSL 1.0 beta |
| ([@https://svn.boost.org/trac/boost/ticket/3256 #3256]). |
| * Eliminated a redundant system call in the Solaris [^/dev/poll] backend. |
| * Fixed a bug in resizing of the bucket array in the internal hash maps |
| ([@https://svn.boost.org/trac/boost/ticket/3095 #3095]). |
| * Ensured correct propagation of the error code when a synchronous accept fails |
| ([@https://svn.boost.org/trac/boost/ticket/3216 #3216]). |
| * Ensured correct propagation of the error code when a synchronous read or |
| write on a Windows HANDLE fails. |
| * Fixed failures reported when `_GLIBCXX_DEBUG` is defined |
| ([@https://svn.boost.org/trac/boost/ticket/3098 #3098]). |
| * Fixed custom memory allocation support for timers |
| ([@https://svn.boost.org/trac/boost/ticket/3107 #3107]). |
| * Tidied up various warnings reported by g++ |
| ([@https://svn.boost.org/trac/boost/ticket/1341 #1341], |
| [@https://svn.boost.org/trac/boost/ticket/2618 #2618]). |
| * Various documentation improvements, including more obvious hyperlinks to |
| function overloads, header file information, examples for the handler type |
| requirements, and adding enum values to the index |
| ([@https://svn.boost.org/trac/boost/ticket/3157 #3157], |
| [@https://svn.boost.org/trac/boost/ticket/2620 #2620]). |
| |
| [heading Asio 1.4.2 / Boost 1.39] |
| |
| * Implement automatic resizing of the bucket array in the internal hash maps. |
| This is to improve performance for very large numbers of asynchronous |
| operations and also to reduce memory usage for very small numbers. A new |
| macro `BOOST_ASIO_HASH_MAP_BUCKETS` may be used to tweak the sizes used for |
| the bucket arrays. (N.B. this feature introduced a bug which was fixed in |
| Asio 1.4.3 / Boost 1.40.) |
| * Add performance optimisation for the Windows IOCP backend for when no timers |
| are used. |
| * Prevent locale settings from affecting formatting of TCP and UDP endpoints |
| ([@https://svn.boost.org/trac/boost/ticket/2682 #2682]). |
| * Fix a memory leak that occurred when an asynchronous SSL operation's |
| completion handler threw an exception |
| ([@https://svn.boost.org/trac/boost/ticket/2910 #2910]). |
| * Fix the implementation of `io_control()` so that it adheres to the |
| documented type requirements for IoControlCommand |
| ([@https://svn.boost.org/trac/boost/ticket/2820 #2820]). |
| * Fix incompatibility between Asio and ncurses.h |
| ([@https://svn.boost.org/trac/boost/ticket/2156 #2156]). |
| * On Windows, specifically handle the case when an overlapped `ReadFile` call |
| fails with `ERROR_MORE_DATA`. This enables a hack where a |
| `windows::stream_handle` can be used with a message-oriented named pipe |
| ([@https://svn.boost.org/trac/boost/ticket/2936 #2936]). |
| * Fix system call wrappers to always clear the error on success, as POSIX |
| allows successful system calls to modify errno |
| ([@https://svn.boost.org/trac/boost/ticket/2953 #2953]). |
| * Don't include termios.h if `BOOST_ASIO_DISABLE_SERIAL_PORT` is defined |
| ([@https://svn.boost.org/trac/boost/ticket/2917 #2917]). |
| * Cleaned up some more MSVC level 4 warnings |
| ([@https://svn.boost.org/trac/boost/ticket/2828 #2828]). |
| * Various documentation fixes |
| ([@https://svn.boost.org/trac/boost/ticket/2871 #2871]). |
| |
| [heading Asio 1.4.1 / Boost 1.38] |
| |
| * Improved compatibility with some Windows firewall software. |
| * Ensured arguments to `windows::overlapped_ptr::complete()` are correctly |
| passed to the completion handler |
| ([@https://svn.boost.org/trac/boost/ticket/2614 #2614]). |
| * Fixed a link problem and multicast failure on QNX |
| ([@https://svn.boost.org/trac/boost/ticket/2504 #2504], |
| [@https://svn.boost.org/trac/boost/ticket/2530 #2530]). |
| * Fixed a compile error in SSL support on MinGW / g++ 3.4.5. |
| * Drop back to using a pipe for notification if eventfd is not available at |
| runtime on Linux ([@https://svn.boost.org/trac/boost/ticket/2683 #2683]). |
| * Various minor bug and documentation fixes |
| ([@https://svn.boost.org/trac/boost/ticket/2534 #2534], |
| [@https://svn.boost.org/trac/boost/ticket/2541 #2541], |
| [@https://svn.boost.org/trac/boost/ticket/2607 #2607], |
| [@https://svn.boost.org/trac/boost/ticket/2617 #2617], |
| [@https://svn.boost.org/trac/boost/ticket/2619 #2619]). |
| |
| [heading Asio 1.4.0 / Boost 1.37] |
| |
| * Enhanced CompletionCondition concept with the signature |
| `size_t CompletionCondition(error_code ec, size_t total)`, where the return |
| value indicates the maximum number of bytes to be transferred on the next |
| read or write operation. (The old CompletionCondition signature is still |
| supported for backwards compatibility). |
| * New windows::overlapped_ptr class to allow arbitrary overlapped I/O |
| functions (such as TransmitFile) to be used with Asio. |
| * On recent versions of Linux, an eventfd descriptor is now used (rather than |
| a pipe) to interrupt a blocked select/epoll reactor. |
| * Added const overloads of lowest_layer(). |
| * Synchronous read, write, accept and connect operations are now thread safe |
| (meaning that it is now permitted to perform concurrent synchronous |
| operations on an individual socket, if supported by the OS). |
| * Reactor-based io_service implementations now use lazy initialisation to |
| reduce the memory usage of an io_service object used only as a message |
| queue. |
| |
| [heading Asio 1.2.0 / Boost 1.36] |
| |
| * Added support for serial ports. |
| * Added support for UNIX domain sockets. |
| * Added support for raw sockets and ICMP. |
| * Added wrappers for POSIX stream-oriented file descriptors (excluding regular |
| files). |
| * Added wrappers for Windows stream-oriented `HANDLE`s such as named pipes |
| (requires `HANDLE`s that work with I/O completion ports). |
| * Added wrappers for Windows random-access `HANDLE`s such as files (requires |
| `HANDLE`s that work with I/O completion ports). |
| * Added support for reactor-style operations (i.e. they report readiness but |
| perform no I/O) using a new `null_buffers` type. |
| * Added an iterator type for bytewise traversal of buffer sequences. |
| * Added new `read_until()` and `async_read_until()` overloads that take a |
| user-defined function object for locating message boundaries. |
| * Added an experimental two-lock queue (enabled by defining |
| `BOOST_ASIO_ENABLE_TWO_LOCK_QUEUE`) that may provide better `io_service` |
| scalability across many processors. |
| * Various fixes, performance improvements, and more complete coverage of the |
| custom memory allocation support. |
| |
| [heading Asio 1.0.0 / Boost 1.35] |
| |
| First release of Asio as part of Boost. |
| |
| [endsect] |