epoll_reactor.hpp doesn`t compile with some versions of gcc

[anonymous]

epoll_reactor.hpp doesn`t compile with some old versions of gcc. Actually I have 4.0.2. I have applied small patch that resolves problem.

Here is example of compilation error.

• Compile discovery_layer.cxx [class: dll] ...

/usr/bin/g++ -MT /home/esuitebuild/AV-Desk-REL-600-AV_201011220/0bld-generic-gcc/drwcs/io/discovery_layer.odll -MD -MP -MF /home/esuitebuild/AV-Desk-REL-600-AV_201011220/0bld-generic-gcc/d\ rwcs/io/discovery_layer.odll.dep -fPIC -DPIC -DNDEBUG -pipe -c -march=pentiumpro -Wall -W -Wredundant-decls -pthread -pedantic -Wno-long-long -D_REENTRANT -D_THREAD_SAFE -D_LARGEFILE64_S\ OURCE -o /home/esuitebuild/AV-Desk-REL-600-AV_201011220/0bld-generic-gcc/drwcs/io/discovery_layer.odll discovery_layer.cxx -O3 -s -I"/home/esuitebuild/AV-Desk-REL-600-AV_201011220/drwcs" \ -isystem"/home/esuitebuild/boost_1_45_0" -I"/home/esuitebuild/AV-Desk-REL-600-AV_201011220/ES-Key" -I"/home/esuitebuild/AV-Desk-REL-600-AV_201011220/0ins-generic-gcc/include" -I"/home/esui\ tebuild/AV-Desk-REL-600-AV_201011220/zlib" -I/usr/local/include -DSYSTEM=\"Linux\" -DARCH=\"x86\" -DUSE_THREADS -DBUILD_DRWCC -DBOOST_ALL_NO_LIB -DSTATIC=static /home/esuitebuild/boost_1_45_0/boost/asio/detail/impl/epoll_reactor.ipp: In member function 'void boost::asio::detail::epoll_reactor::start_op(int, boost::asio::detail::socket_type, boost:\ :asio::detail::epoll_reactor::descriptor_state*&, boost::asio::detail::reactor_op*, bool)': /home/esuitebuild/boost_1_45_0/boost/asio/detail/impl/epoll_reactor.ipp:140: error: 'boost::asio::detail::epoll_reactor::<anonymous enum>' is/uses anonymous type /home/esuitebuild/boost_1_45_0/boost/asio/detail/impl/epoll_reactor.ipp:140: error: trying to instantiate 'template<class T> struct boost::is_integral' {standard input}: Assembler messages: {standard input}:1788: Error: Local symbol .LTHUNK0' can't be equated to undefined symbol _ZN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEE\ D0Ev' {standard input}:1788: Error: Local symbol .LTHUNK1' can't be equated to undefined symbol _ZN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEE\ D0Ev' {standard input}:1788: Error: Local symbol .LTHUNK2' can't be equated to undefined symbol _ZN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEE\ D1Ev' {standard input}:1788: Error: Local symbol .LTHUNK3' can't be equated to undefined symbol _ZN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEE\ D1Ev' {standard input}:1788: Error: Local symbol .LTHUNK4' can't be equated to undefined symbol _ZN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_6system12system_errorEEEED0\

[chris_kohlhoff]

(In [69194]) Changes for asio version 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. Checking may be disabled by defining BOOST_ASIO_DISABLE_HANDLER_TYPE_REQUIREMENTS.

• Made the is_loopback(), is_unspecified() and is_multicast() functions consistently available across the ip::address, ip::address_v4 and ip::address_v6 classes. Refs #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. Refs #3307.

• Added the io_control() member function for socket acceptors. Refs #3297.

• 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. Refs #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()).

• 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. Refs #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. Refs #4971.

• 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. Refs #4883.

• Added an explicit cast to the FIONBIO constant to int to suppress a compiler warning on some platforms. Refs #5128.

• Fixed warnings reported by g++'s -Wshadow compiler option. Refs #3905.

[chris_kohlhoff]

(In [69680]) Merge selected bug fixes from trunk:

• Fixed a compile error on some versions of g++ due to anonymous enums. Fixes #4883.

• 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().)

• 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. Use EV_CLEAR instead. Fixes #5021.

• 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.

• Fixed the linger socket option on non-Windows platforms.

• Fixed function name in comment for asio::placeholders::iterator.