| [/ |
| / Copyright (c) 2003-2013 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 1.10.1] |
| |
| * 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. |
| |
| * Extended the ability to use Asio without Boost to include Microsoft Visual |
| Studio 2012. When using a C++11 compiler, most of Asio may now be used |
| without a dependency on Boost header files or libraries. To use Asio in this |
| way, define `ASIO_STANDALONE` on your compiler command line or as part of the |
| project options. This standalone configuration has been tested for the |
| following platforms and compilers: |
| |
| * Microsoft Visual Studio 2012 |
| |
| * Linux with g++ 4.7 or 4.8 (requires [^-std=c++11]) |
| |
| * Mac OS X with clang++ / Xcode 4.6 (requires [^-std=c++11 -stdlib=libc++]) |
| |
| * Fixed a regression (introduced in 1.10.0) where, on some platforms, errors |
| from `async_connect` were not correctly propagated through to the completion |
| handler. |
| |
| * Fixed a Windows-specific regression (introduced in 1.10.0) 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. |
| |
| * Fixed a bug in handler tracking, where it was not correctly printing out some |
| handler IDs. |
| |
| * Fixed the comparison used to test for successful synchronous accept |
| operations so that it works correctly with unsigned socket descriptors. |
| |
| * Ensured the signal number is correctly passed to the completion handler when |
| starting an `async_wait` on a signal that is already raised. |
| |
| * Suppressed a g++ 4.8+ warning about unused typedefs. |
| |
| * Enabled the move optimisation for handlers that use the default invocation |
| hook. |
| |
| * Clarified that programs must not issue overlapping `async_write_at` |
| operations. |
| |
| * Changed the Windows `HANDLE` backend to treat `ERROR_MORE_DATA` as a |
| non-fatal error when returned by `GetOverlappedResult` for a synchronous |
| read. |
| |
| * 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 1.10.0. In particular, the buffered stream templates have been |
| updated so that they adhere to current handler patterns. |
| |
| * Enabled move support for Microsoft Visual Studio 2012. |
| |
| * 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. |
| |
| * Eliminated some unnecessary handler copies. |
| |
| * Fixed support for older versions of OpenSSL that do not provide the |
| `SSL_CTX_clear_options` function. |
| |
| * Fixed various minor and cosmetic issues in code and documentation. |
| |
| [heading Asio 1.10.0] |
| |
| * 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 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 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 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 |
| 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 |
| 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 |
| 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. |
| |
| * Add the ability to use Asio without Boost, for a limited set of platforms. |
| When using a C++11 compiler, most of Asio may now be used without a |
| dependency on Boost header files or libraries. To use Asio in this way, |
| define `ASIO_STANDALONE` on your compiler command line or as part of the |
| project options. This standalone configuration has currently been tested for |
| the following platforms and compilers: |
| |
| * Linux with g++ 4.7 (requires [^-std=c++11]) |
| |
| * Mac OS X with clang++ / Xcode 4.6 (requires [^-std=c++11 -stdlib=libc++]) |
| |
| * 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. |
| |
| * Fixed copy-paste errors in waitable timer documentation. |
| |
| * Added assertions to satisfy some code analysis tools. |
| |
| * Fixed a malformed `#warning` directive. |
| |
| * 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`. |
| |
| * 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. |
| |
| * Fixed implementation of asynchronous connect operation so that it can cope |
| with spurious readiness notifications from the reactor. |
| |
| * Fixed a memory leak in the `ssl::rfc2818_verification` class. |
| |
| * Added a mechanism for disabling automatic Winsock initialisation. See the |
| header file [^asio/detail/winsock_init.hpp] for details. |
| |
| [heading Asio 1.8.3] |
| |
| * Fixed some 64-to-32-bit conversion warnings. |
| |
| * Fixed various small errors in documentation and comments. |
| |
| * Fixed an error in the example embedded in `basic_socket::get_option`'s |
| documentation. |
| |
| * Changed to use `long` rather than `int` for SSL_CTX options, to match OpenSSL. |
| |
| * Changed to use `_snwprintf` to address a compile error due to the changed |
| `swprintf` signature in recent versions of MinGW. |
| |
| * Fixed a deadlock that can occur on Windows when shutting down a pool of |
| `io_service` threads due to running out of work. |
| |
| * Changed UNIX domain socket example to treat errors from `accept` as non-fatal. |
| |
| * Added a small block recycling optimisation to improve default memory |
| allocation behaviour. |
| |
| [heading Asio 1.8.2] |
| |
| * Fixed an incompatibility between `ip::tcp::iostream` and C++11. |
| |
| * Decorated GCC attribute names with underscores to prevent interaction |
| with user-defined macros. |
| |
| * Added missing `#include <cctype>`, needed for some versions of MinGW. |
| |
| * Changed to use [^gcc]'s atomic builtins on ARM CPUs, when available. |
| |
| * 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. |
| |
| * Changed the SSL implementation to throw an exception if SSL engine |
| initialisation fails. |
| |
| * Fixed another regression in `buffered_write_stream`. |
| |
| * Implemented various minor performance improvements, primarily targeted at |
| Linux x86 and x86-64 platforms. |
| |
| [heading Asio 1.8.1] |
| |
| * 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`. |
| |
| * 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. |
| |
| * Fixed a problem where `signal_set` handlers were not being delivered when |
| the `io_service` was constructed with a `concurrency_hint` of 1. |
| |
| [heading Asio 1.8.0] |
| |
| * 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. |
| |
| * Fixed a compile error on NetBSD. |
| |
| * Fixed deadlock on Mac OS X. |
| |
| * Fixed a regression in `buffered_write_stream`. |
| |
| * Fixed a non-paged pool "leak" on Windows when an `io_service` is repeatedly |
| run without anything to do. |
| |
| * 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] |
| |
| * 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`. |
| |
| * Fixed a Windows-specific compile error by explicitly specifying the |
| `signal()` function from the global namespace. |
| |
| * 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. |
| |
| * Fixed the behaviour of the synchronous `null_buffers` operations so that they |
| obey the user's non-blocking setting. |
| |
| * 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. |
| |
| * 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. |
| |
| * Fixed an exception safety issue in `epoll_reactor` initialisation. |
| |
| * 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] |
| |
| * Improved support for C++0x move construction to further reduce copying of |
| handler objects. In certain designs it is possible to eliminate virtually all |
| copies. Move support is now enabled when compiling in [^-std=c++0x] mode on |
| g++ 4.5 or higher. |
| |
| * Added build support for platforms that don't provide either of `signal()` or |
| `sigaction()`. |
| |
| * Changed to use C++0x variadic templates when they are available, rather than |
| generating function overloads using the Boost.Preprocessor library. |
| |
| * Ensured the value of `errno` is preserved across the implementation's signal |
| handler. |
| |
| * On Windows, ensured the count of outstanding work is decremented for |
| abandoned operations (i.e. operations that are being cleaned up within the |
| `io_service` destructor). |
| |
| * Fixed behaviour of zero-length reads and writes in the new SSL implementation. |
| |
| * Added support for building with OpenSSL 1.0 when `OPENSSL_NO_SSL2` is defined. |
| |
| * Changed most examples to treat a failure by an accept operation as non-fatal. |
| |
| * 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. |
| |
| [heading Asio 1.5.3] |
| |
| * 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`. |
| |
| * Added new `asio::buffer()` overloads for `std::array`, when available. The |
| support is automatically enabled when compiling in [^-std=c++0x] mode on g++ |
| 4.3 or higher, or when using MSVC 10. The support may be explicitly enabled |
| by defining `(BOOST_)ASIO_HAS_STD_ARRAY`, or disabled by defining |
| `(BOOST_)ASIO_DISABLE_STD_ARRAY`. |
| |
| * Changed to use the C++0x standard library templates `array`, `shared_ptr`, |
| `weak_ptr` and `atomic` when they are available, rather than the Boost |
| equivalents. |
| |
| * Support for `std::error_code` and `std::system_error` is no longer enabled by |
| default for g++ 4.5, as that compiler's standard library does not implement |
| `std::system_error::what()` correctly. |
| |
| [heading Asio 1.5.2] |
| |
| * Added support for C++0x move construction and assignment to sockets, serial |
| ports, POSIX descriptors and Windows handles. |
| |
| * 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. |
| |
| * 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. |
| |
| * The kqueue flag `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. |
| |
| * Changed exception reporting to include the function name in exception `what()` |
| messages. |
| |
| * Fixed an insufficient initialisers warning with MinGW. |
| |
| * Changed the `shutdown_service()` member functions to be private. |
| |
| * Added archetypes for testing socket option functions. |
| |
| * Added a missing lock in `signal_set_service::cancel()`. |
| |
| * Fixed a copy/paste error in `SignalHandler` example. |
| |
| * Added the inclusion of the signal header to `signal_set_service.hpp` so that |
| constants like `NSIG` may be used. |
| |
| * Changed the `signal_set_service` implementation so that it doesn't assume |
| that `SIGRTMAX` is a compile-time constant. |
| |
| * 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. |
| |
| [heading Asio 1.5.1] |
| |
| * 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 registered with multiple |
| `signal_set` objects, however the signal number must be used only with Asio. |
| |
| * 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). |
| |
| * Fixed a bug in `asio::streambuf` where the `consume()` function did not |
| always update the internal buffer pointers correctly. The problem may occur |
| when the `asio::streambuf` is filled with data using the standard C++ member |
| functions such as `sputn()`. (Note: the problem does not manifest when the |
| streambuf is populated by the Asio free functions `read()`, |
| `async_read()`, `read_until()` or `async_read_until()`.) |
| |
| * Fixed a bug on kqueue-based platforms, where reactor read operations that |
| return false from their `perform()` function are not correctly re-registered |
| with kqueue. |
| |
| * Support for `std::error_code` and `std::system_error` is no longer enabled by |
| default for MSVC10, as that compiler's standard library does not implement |
| `std::system_error::what()` correctly. |
| |
| * Modified the `buffers_iterator<>` and `ip::basic_resolver_iterator` classes |
| so that the value_type typedefs are non-const byte types. |
| |
| [heading Asio 1.5.0] |
| |
| * 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. |
| |
| * 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 support for using `std::error_code` and `std::system_error`, when |
| available. The support is automatically enabled when compiling in |
| [^-std=c++0x] mode on g++ 4.5 or higher, or when using MSVC 10. The support |
| may be explicitly enabled by defining `ASIO_HAS_STD_SYSTEM_ERROR`, or |
| disabled by defining `ASIO_DISABLE_STD_SYSTEM_ERROR`. (Available in non-Boost |
| version of Asio only.) |
| |
| * Made the `is_loopback()`, `is_unspecified()` and `is_multicast()` functions |
| consistently available across the `ip::address`, `ip::address_v4` and |
| `ip::address_v6` classes. |
| |
| * 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. |
| |
| * 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 a `release()` member function to posix descriptors. This function |
| releases ownership of the underlying native descriptor to the caller. |
| |
| * 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()`). |
| |
| * Reduced the copying of handler function objects. |
| |
| * Added support for C++0x move construction to further reduce copying of |
| handler objects. Move support is enabled when compiling in [^-std=c++0x] mode |
| on g++ 4.5 or higher, or when using MSVC10. |
| |
| * Removed the dependency on OS-provided macros for the well-known IPv4 and IPv6 |
| addresses. This should eliminate the annoying "missing braces around |
| initializer" warnings. |
| |
| * 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. |
| |
| * Changed the SSL error category to return error strings from the OpenSSL |
| library. |
| |
| * Changed the separate compilation support such that, to use Asio's SSL |
| capabilities, you should also include 'asio/ssl/impl/src.hpp` in one source |
| file in your program. |
| |
| * 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. |
| |
| * Fixed a compile error on some versions of g++ due to anonymous enums. |
| |
| * Added an explicit cast to the `FIONBIO` constant to int to suppress a compiler |
| warning on some platforms. |
| |
| * Fixed warnings reported by g++'s [^-Wshadow] compiler option. |
| |
| [heading Asio 1.4.8] |
| |
| * 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. |
| |
| [heading Asio 1.4.7] |
| |
| * Fixed a problem on kqueue-based platforms where a `deadline_timer` may |
| never fire if the `io_service` is running in a background thread. |
| |
| * Fixed a const-correctness issue that prevented valid uses of |
| `has_service<>` from compiling. |
| |
| * Fixed MinGW cross-compilation. |
| |
| * Removed dependency on deprecated Boost.System functions (Boost.Asio only). |
| |
| * Ensured `close()`/`closesocket()` failures are correctly propagated. |
| |
| * Added a check for errors returned by `InitializeCriticalSectionAndSpinCount`. |
| |
| * Added support for hardware flow control on QNX. |
| |
| * Always use `pselect()` on HP-UX, if it is available. |
| |
| * Ensured handler arguments are passed as lvalues. |
| |
| * Fixed Windows build when thread support is disabled. |
| |
| * Fixed a Windows-specific problem where `deadline_timer` objects with expiry |
| times set more than 5 minutes in the future may never expire. |
| |
| * Fixed the resolver backend on BSD platforms so that an empty service name |
| resolves to port number `0`, as per the documentation. |
| |
| * Fixed read operations so that they do not accept buffer sequences of type |
| `const_buffers_1`. |
| |
| * Redefined `Protocol` and `id` to avoid clashing with Objective-C++ keywords. |
| |
| * Fixed a `vector` reallocation performance issue that can occur when there are |
| many active `deadline_timer` objects. |
| |
| * Fixed the kqueue backend so that it compiles on NetBSD. |
| |
| * Fixed the socket `io_control()` implementation on 64-bit Mac OS X and BSD |
| platforms. |
| |
| * Fixed a Windows-specific problem where failures from `accept()` are |
| incorrectly treated as successes. |
| |
| * Deprecated the separate compilation header `asio/impl/src.cpp` in |
| favour of `asio/impl/src.hpp`. |
| |
| [heading Asio 1.4.6] |
| |
| * 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, include |
| `asio/impl/src.cpp` in 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`. |
| |
| * Ensured unsigned char is used with `isdigit` in `getaddrinfo` emulation. |
| |
| * Fixed handling of very small but non-zero timeouts. |
| |
| * 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`. |
| |
| * Implemented cancellation of `null_buffers` operations on Windows. |
| |
| [heading Asio 1.4.5] |
| |
| * 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. |
| |
| * 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. |
| |
| * Fixed a bug where 0-byte asynchronous reads were incorrectly passing |
| an `error::eof` result to the completion handler. |
| |
| * Changed the `io_control()` member functions to always call `ioctl` on |
| the underlying descriptor when modifying blocking mode. |
| |
| * Changed the resolver implementation so that it no longer requires 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] |
| |
| * 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. |
| |
| * Restricted MSVC buffer debugging workaround to 2008, as it causes a |
| crash with 2010 beta 2. |
| |
| * 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. |
| |
| * Added a `boost_` prefix to the `extern "C"` thread entry point |
| function. |
| |
| * 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. |
| |
| * Added some support for platforms that use older compilers such as g++ |
| 2.95. |
| |
| [heading Asio 1.4.3] |
| |
| * 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. |
| |
| * Made Asio compatible with the OpenSSL 1.0 beta. |
| |
| * 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. |
| |
| * Ensured correct propagation of the error code when a synchronous |
| accept fails. |
| |
| * 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. |
| |
| * Fixed custom memory allocation support for timers. |
| |
| * Tidied up various warnings reported by g++. |
| |
| * 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. |
| |
| [heading Asio 1.4.2] |
| |
| * 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. |
| |
| * Fix a memory leak that occurred when an asynchronous SSL operation's |
| completion handler threw an exception. |
| |
| * Fix the implementation of `io_control()` so that it adheres to the |
| documented type requirements for IoControlCommand. |
| |
| * Fix incompatibility between Asio and ncurses.h. |
| |
| * 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. |
| |
| * Fix system call wrappers to always clear the error on success, as |
| POSIX allows successful system calls to modify errno. |
| |
| * Don't include termios.h if `(BOOST_)ASIO_DISABLE_SERIAL_PORT` is |
| defined. |
| |
| * Cleaned up some more MSVC level 4 warnings. |
| |
| * Various documentation fixes. |
| |
| [heading Asio 1.4.1] |
| |
| * Improved compatibility with some Windows firewall software. |
| |
| * Ensured arguments to `windows::overlapped_ptr::complete()` are correctly |
| passed to the completion handler. |
| |
| * Fixed a link problem and multicast failure on QNX. |
| |
| * 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. |
| |
| * Various minor bug and documentation fixes. |
| |
| [heading Asio 1.4.0] |
| |
| * 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] |
| |
| * 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] |
| |
| First stable release of Asio. |
| |
| [endsect] |