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author | Remko Tronçon <git@el-tramo.be> | 2010-02-11 12:14:00 (GMT) |
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committer | Remko Tronçon <git@el-tramo.be> | 2010-02-11 12:14:00 (GMT) |
commit | 0efa7c32aaf21a29b42b5926cc116007056843be (patch) | |
tree | 882f663a5dd0e65694bf6077b71086dd77fd7ff8 /3rdParty/Boost/boost/asio/detail/win_iocp_handle_service.hpp | |
parent | 1d20eabbc32274b491b4c2bedf73d19933d97bfd (diff) | |
download | swift-contrib-0efa7c32aaf21a29b42b5926cc116007056843be.zip swift-contrib-0efa7c32aaf21a29b42b5926cc116007056843be.tar.bz2 |
Moved some modules into separate git modules.
Diffstat (limited to '3rdParty/Boost/boost/asio/detail/win_iocp_handle_service.hpp')
m--------- | 3rdParty/Boost | 0 | ||||
-rw-r--r-- | 3rdParty/Boost/boost/asio/detail/win_iocp_handle_service.hpp | 834 |
2 files changed, 0 insertions, 834 deletions
diff --git a/3rdParty/Boost b/3rdParty/Boost new file mode 160000 +Subproject 3bbdbc8cf1996f23d9a366da8bac0f97be6ad79 diff --git a/3rdParty/Boost/boost/asio/detail/win_iocp_handle_service.hpp b/3rdParty/Boost/boost/asio/detail/win_iocp_handle_service.hpp deleted file mode 100644 index fd204de..0000000 --- a/3rdParty/Boost/boost/asio/detail/win_iocp_handle_service.hpp +++ /dev/null @@ -1,834 +0,0 @@ -// -// win_iocp_handle_service.hpp -// ~~~~~~~~~~~~~~~~~~~~~~~~~~~ -// -// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com) -// Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.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) -// - -#ifndef BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_SERVICE_HPP -#define BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_SERVICE_HPP - -#if defined(_MSC_VER) && (_MSC_VER >= 1200) -# pragma once -#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) - -#include <boost/asio/detail/push_options.hpp> - -#include <boost/asio/detail/win_iocp_io_service_fwd.hpp> - -#if defined(BOOST_ASIO_HAS_IOCP) - -#include <boost/asio/detail/push_options.hpp> -#include <boost/cstdint.hpp> -#include <boost/asio/detail/pop_options.hpp> - -#include <boost/asio/buffer.hpp> -#include <boost/asio/error.hpp> -#include <boost/asio/io_service.hpp> -#include <boost/asio/detail/bind_handler.hpp> -#include <boost/asio/detail/handler_alloc_helpers.hpp> -#include <boost/asio/detail/handler_invoke_helpers.hpp> -#include <boost/asio/detail/mutex.hpp> -#include <boost/asio/detail/win_iocp_io_service.hpp> - -namespace boost { -namespace asio { -namespace detail { - -class win_iocp_handle_service - : public boost::asio::detail::service_base<win_iocp_handle_service> -{ -public: - // Base class for all operations. - typedef win_iocp_io_service::operation operation; - - // The native type of a stream handle. - typedef HANDLE native_type; - - // The implementation type of the stream handle. - class implementation_type - { - public: - // Default constructor. - implementation_type() - : handle_(INVALID_HANDLE_VALUE), - safe_cancellation_thread_id_(0), - next_(0), - prev_(0) - { - } - - private: - // Only this service will have access to the internal values. - friend class win_iocp_handle_service; - - // The native stream handle representation. - native_type handle_; - - // The ID of the thread from which it is safe to cancel asynchronous - // operations. 0 means no asynchronous operations have been started yet. - // ~0 means asynchronous operations have been started from more than one - // thread, and cancellation is not supported for the handle. - DWORD safe_cancellation_thread_id_; - - // Pointers to adjacent handle implementations in linked list. - implementation_type* next_; - implementation_type* prev_; - }; - - win_iocp_handle_service(boost::asio::io_service& io_service) - : boost::asio::detail::service_base<win_iocp_handle_service>(io_service), - iocp_service_(boost::asio::use_service<win_iocp_io_service>(io_service)), - mutex_(), - impl_list_(0) - { - } - - // Destroy all user-defined handler objects owned by the service. - void shutdown_service() - { - // Close all implementations, causing all operations to complete. - boost::asio::detail::mutex::scoped_lock lock(mutex_); - implementation_type* impl = impl_list_; - while (impl) - { - close_for_destruction(*impl); - impl = impl->next_; - } - } - - // Construct a new handle implementation. - void construct(implementation_type& impl) - { - impl.handle_ = INVALID_HANDLE_VALUE; - impl.safe_cancellation_thread_id_ = 0; - - // Insert implementation into linked list of all implementations. - boost::asio::detail::mutex::scoped_lock lock(mutex_); - impl.next_ = impl_list_; - impl.prev_ = 0; - if (impl_list_) - impl_list_->prev_ = &impl; - impl_list_ = &impl; - } - - // Destroy a handle implementation. - void destroy(implementation_type& impl) - { - close_for_destruction(impl); - - // Remove implementation from linked list of all implementations. - boost::asio::detail::mutex::scoped_lock lock(mutex_); - if (impl_list_ == &impl) - impl_list_ = impl.next_; - if (impl.prev_) - impl.prev_->next_ = impl.next_; - if (impl.next_) - impl.next_->prev_= impl.prev_; - impl.next_ = 0; - impl.prev_ = 0; - } - - // Assign a native handle to a handle implementation. - boost::system::error_code assign(implementation_type& impl, - const native_type& native_handle, boost::system::error_code& ec) - { - if (is_open(impl)) - { - ec = boost::asio::error::already_open; - return ec; - } - - if (iocp_service_.register_handle(native_handle, ec)) - return ec; - - impl.handle_ = native_handle; - ec = boost::system::error_code(); - return ec; - } - - // Determine whether the handle is open. - bool is_open(const implementation_type& impl) const - { - return impl.handle_ != INVALID_HANDLE_VALUE; - } - - // Destroy a handle implementation. - boost::system::error_code close(implementation_type& impl, - boost::system::error_code& ec) - { - if (is_open(impl)) - { - if (!::CloseHandle(impl.handle_)) - { - DWORD last_error = ::GetLastError(); - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - return ec; - } - - impl.handle_ = INVALID_HANDLE_VALUE; - impl.safe_cancellation_thread_id_ = 0; - } - - ec = boost::system::error_code(); - return ec; - } - - // Get the native handle representation. - native_type native(const implementation_type& impl) const - { - return impl.handle_; - } - - // Cancel all operations associated with the handle. - boost::system::error_code cancel(implementation_type& impl, - boost::system::error_code& ec) - { - if (!is_open(impl)) - { - ec = boost::asio::error::bad_descriptor; - } - else if (FARPROC cancel_io_ex_ptr = ::GetProcAddress( - ::GetModuleHandleA("KERNEL32"), "CancelIoEx")) - { - // The version of Windows supports cancellation from any thread. - typedef BOOL (WINAPI* cancel_io_ex_t)(HANDLE, LPOVERLAPPED); - cancel_io_ex_t cancel_io_ex = (cancel_io_ex_t)cancel_io_ex_ptr; - if (!cancel_io_ex(impl.handle_, 0)) - { - DWORD last_error = ::GetLastError(); - if (last_error == ERROR_NOT_FOUND) - { - // ERROR_NOT_FOUND means that there were no operations to be - // cancelled. We swallow this error to match the behaviour on other - // platforms. - ec = boost::system::error_code(); - } - else - { - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - } - } - else - { - ec = boost::system::error_code(); - } - } - else if (impl.safe_cancellation_thread_id_ == 0) - { - // No operations have been started, so there's nothing to cancel. - ec = boost::system::error_code(); - } - else if (impl.safe_cancellation_thread_id_ == ::GetCurrentThreadId()) - { - // Asynchronous operations have been started from the current thread only, - // so it is safe to try to cancel them using CancelIo. - if (!::CancelIo(impl.handle_)) - { - DWORD last_error = ::GetLastError(); - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - } - else - { - ec = boost::system::error_code(); - } - } - else - { - // Asynchronous operations have been started from more than one thread, - // so cancellation is not safe. - ec = boost::asio::error::operation_not_supported; - } - - return ec; - } - - class overlapped_wrapper - : public OVERLAPPED - { - public: - explicit overlapped_wrapper(boost::system::error_code& ec) - { - Internal = 0; - InternalHigh = 0; - Offset = 0; - OffsetHigh = 0; - - // Create a non-signalled manual-reset event, for GetOverlappedResult. - hEvent = ::CreateEvent(0, TRUE, FALSE, 0); - if (hEvent) - { - // As documented in GetQueuedCompletionStatus, setting the low order - // bit of this event prevents our synchronous writes from being treated - // as completion port events. - *reinterpret_cast<DWORD_PTR*>(&hEvent) |= 1; - } - else - { - DWORD last_error = ::GetLastError(); - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - } - } - - ~overlapped_wrapper() - { - if (hEvent) - { - ::CloseHandle(hEvent); - } - } - }; - - // Write the given data. Returns the number of bytes written. - template <typename ConstBufferSequence> - size_t write_some(implementation_type& impl, - const ConstBufferSequence& buffers, boost::system::error_code& ec) - { - return write_some_at(impl, 0, buffers, ec); - } - - // Write the given data at the specified offset. Returns the number of bytes - // written. - template <typename ConstBufferSequence> - size_t write_some_at(implementation_type& impl, boost::uint64_t offset, - const ConstBufferSequence& buffers, boost::system::error_code& ec) - { - if (!is_open(impl)) - { - ec = boost::asio::error::bad_descriptor; - return 0; - } - - // Find first buffer of non-zero length. - boost::asio::const_buffer buffer; - typename ConstBufferSequence::const_iterator iter = buffers.begin(); - typename ConstBufferSequence::const_iterator end = buffers.end(); - for (DWORD i = 0; iter != end; ++iter, ++i) - { - buffer = boost::asio::const_buffer(*iter); - if (boost::asio::buffer_size(buffer) != 0) - break; - } - - // A request to write 0 bytes on a handle is a no-op. - if (boost::asio::buffer_size(buffer) == 0) - { - ec = boost::system::error_code(); - return 0; - } - - overlapped_wrapper overlapped(ec); - if (ec) - { - return 0; - } - - // Write the data. - overlapped.Offset = offset & 0xFFFFFFFF; - overlapped.OffsetHigh = (offset >> 32) & 0xFFFFFFFF; - BOOL ok = ::WriteFile(impl.handle_, - boost::asio::buffer_cast<LPCVOID>(buffer), - static_cast<DWORD>(boost::asio::buffer_size(buffer)), 0, &overlapped); - if (!ok) - { - DWORD last_error = ::GetLastError(); - if (last_error != ERROR_IO_PENDING) - { - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - return 0; - } - } - - // Wait for the operation to complete. - DWORD bytes_transferred = 0; - ok = ::GetOverlappedResult(impl.handle_, - &overlapped, &bytes_transferred, TRUE); - if (!ok) - { - DWORD last_error = ::GetLastError(); - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - } - - ec = boost::system::error_code(); - return bytes_transferred; - } - - template <typename ConstBufferSequence, typename Handler> - class write_operation - : public operation - { - public: - write_operation(win_iocp_io_service& io_service, - const ConstBufferSequence& buffers, Handler handler) - : operation(io_service, - &write_operation<ConstBufferSequence, Handler>::do_completion_impl, - &write_operation<ConstBufferSequence, Handler>::destroy_impl), - work_(io_service.get_io_service()), - buffers_(buffers), - handler_(handler) - { - } - - private: - static void do_completion_impl(operation* op, - DWORD last_error, size_t bytes_transferred) - { - // Take ownership of the operation object. - typedef write_operation<ConstBufferSequence, Handler> op_type; - op_type* handler_op(static_cast<op_type*>(op)); - typedef handler_alloc_traits<Handler, op_type> alloc_traits; - handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op); - -#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) - // Check whether buffers are still valid. - typename ConstBufferSequence::const_iterator iter - = handler_op->buffers_.begin(); - typename ConstBufferSequence::const_iterator end - = handler_op->buffers_.end(); - while (iter != end) - { - boost::asio::const_buffer buffer(*iter); - boost::asio::buffer_cast<const char*>(buffer); - ++iter; - } -#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) - - // Make a copy of the handler so that the memory can be deallocated before - // the upcall is made. - Handler handler(handler_op->handler_); - - // Free the memory associated with the handler. - ptr.reset(); - - // Call the handler. - boost::system::error_code ec(last_error, - boost::asio::error::get_system_category()); - boost_asio_handler_invoke_helpers::invoke( - bind_handler(handler, ec, bytes_transferred), &handler); - } - - static void destroy_impl(operation* op) - { - // Take ownership of the operation object. - typedef write_operation<ConstBufferSequence, Handler> op_type; - op_type* handler_op(static_cast<op_type*>(op)); - typedef handler_alloc_traits<Handler, op_type> alloc_traits; - handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op); - - // A sub-object of the handler may be the true owner of the memory - // associated with the handler. Consequently, a local copy of the handler - // is required to ensure that any owning sub-object remains valid until - // after we have deallocated the memory here. - Handler handler(handler_op->handler_); - (void)handler; - - // Free the memory associated with the handler. - ptr.reset(); - } - - boost::asio::io_service::work work_; - ConstBufferSequence buffers_; - Handler handler_; - }; - - // Start an asynchronous write. The data being written must be valid for the - // lifetime of the asynchronous operation. - template <typename ConstBufferSequence, typename Handler> - void async_write_some(implementation_type& impl, - const ConstBufferSequence& buffers, Handler handler) - { - async_write_some_at(impl, 0, buffers, handler); - } - - // Start an asynchronous write at a specified offset. The data being written - // must be valid for the lifetime of the asynchronous operation. - template <typename ConstBufferSequence, typename Handler> - void async_write_some_at(implementation_type& impl, boost::uint64_t offset, - const ConstBufferSequence& buffers, Handler handler) - { - if (!is_open(impl)) - { - this->get_io_service().post(bind_handler(handler, - boost::asio::error::bad_descriptor, 0)); - return; - } - - // Update the ID of the thread from which cancellation is safe. - if (impl.safe_cancellation_thread_id_ == 0) - impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId(); - else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId()) - impl.safe_cancellation_thread_id_ = ~DWORD(0); - - // Allocate and construct an operation to wrap the handler. - typedef write_operation<ConstBufferSequence, Handler> value_type; - typedef handler_alloc_traits<Handler, value_type> alloc_traits; - raw_handler_ptr<alloc_traits> raw_ptr(handler); - handler_ptr<alloc_traits> ptr(raw_ptr, iocp_service_, buffers, handler); - - // Find first buffer of non-zero length. - boost::asio::const_buffer buffer; - typename ConstBufferSequence::const_iterator iter = buffers.begin(); - typename ConstBufferSequence::const_iterator end = buffers.end(); - for (DWORD i = 0; iter != end; ++iter, ++i) - { - buffer = boost::asio::const_buffer(*iter); - if (boost::asio::buffer_size(buffer) != 0) - break; - } - - // A request to write 0 bytes on a handle is a no-op. - if (boost::asio::buffer_size(buffer) == 0) - { - boost::asio::io_service::work work(this->get_io_service()); - ptr.reset(); - boost::system::error_code error; - iocp_service_.post(bind_handler(handler, error, 0)); - return; - } - - // Write the data. - DWORD bytes_transferred = 0; - ptr.get()->Offset = offset & 0xFFFFFFFF; - ptr.get()->OffsetHigh = (offset >> 32) & 0xFFFFFFFF; - BOOL ok = ::WriteFile(impl.handle_, - boost::asio::buffer_cast<LPCVOID>(buffer), - static_cast<DWORD>(boost::asio::buffer_size(buffer)), - &bytes_transferred, ptr.get()); - DWORD last_error = ::GetLastError(); - - // Check if the operation completed immediately. - if (!ok && last_error != ERROR_IO_PENDING) - { - boost::asio::io_service::work work(this->get_io_service()); - ptr.reset(); - boost::system::error_code ec(last_error, - boost::asio::error::get_system_category()); - iocp_service_.post(bind_handler(handler, ec, bytes_transferred)); - } - else - { - ptr.release(); - } - } - - // Read some data. Returns the number of bytes received. - template <typename MutableBufferSequence> - size_t read_some(implementation_type& impl, - const MutableBufferSequence& buffers, boost::system::error_code& ec) - { - return read_some_at(impl, 0, buffers, ec); - } - - // Read some data at a specified offset. Returns the number of bytes received. - template <typename MutableBufferSequence> - size_t read_some_at(implementation_type& impl, boost::uint64_t offset, - const MutableBufferSequence& buffers, boost::system::error_code& ec) - { - if (!is_open(impl)) - { - ec = boost::asio::error::bad_descriptor; - return 0; - } - - // Find first buffer of non-zero length. - boost::asio::mutable_buffer buffer; - typename MutableBufferSequence::const_iterator iter = buffers.begin(); - typename MutableBufferSequence::const_iterator end = buffers.end(); - for (DWORD i = 0; iter != end; ++iter, ++i) - { - buffer = boost::asio::mutable_buffer(*iter); - if (boost::asio::buffer_size(buffer) != 0) - break; - } - - // A request to read 0 bytes on a stream handle is a no-op. - if (boost::asio::buffer_size(buffer) == 0) - { - ec = boost::system::error_code(); - return 0; - } - - overlapped_wrapper overlapped(ec); - if (ec) - { - return 0; - } - - // Read some data. - overlapped.Offset = offset & 0xFFFFFFFF; - overlapped.OffsetHigh = (offset >> 32) & 0xFFFFFFFF; - BOOL ok = ::ReadFile(impl.handle_, - boost::asio::buffer_cast<LPVOID>(buffer), - static_cast<DWORD>(boost::asio::buffer_size(buffer)), 0, &overlapped); - if (!ok) - { - DWORD last_error = ::GetLastError(); - if (last_error != ERROR_IO_PENDING && last_error != ERROR_MORE_DATA) - { - if (last_error == ERROR_HANDLE_EOF) - { - ec = boost::asio::error::eof; - } - else - { - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - } - return 0; - } - } - - // Wait for the operation to complete. - DWORD bytes_transferred = 0; - ok = ::GetOverlappedResult(impl.handle_, - &overlapped, &bytes_transferred, TRUE); - if (!ok) - { - DWORD last_error = ::GetLastError(); - if (last_error == ERROR_HANDLE_EOF) - { - ec = boost::asio::error::eof; - } - else - { - ec = boost::system::error_code(last_error, - boost::asio::error::get_system_category()); - } - } - - ec = boost::system::error_code(); - return bytes_transferred; - } - - template <typename MutableBufferSequence, typename Handler> - class read_operation - : public operation - { - public: - read_operation(win_iocp_io_service& io_service, - const MutableBufferSequence& buffers, Handler handler) - : operation(io_service, - &read_operation< - MutableBufferSequence, Handler>::do_completion_impl, - &read_operation< - MutableBufferSequence, Handler>::destroy_impl), - work_(io_service.get_io_service()), - buffers_(buffers), - handler_(handler) - { - } - - private: - static void do_completion_impl(operation* op, - DWORD last_error, size_t bytes_transferred) - { - // Take ownership of the operation object. - typedef read_operation<MutableBufferSequence, Handler> op_type; - op_type* handler_op(static_cast<op_type*>(op)); - typedef handler_alloc_traits<Handler, op_type> alloc_traits; - handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op); - -#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) - // Check whether buffers are still valid. - typename MutableBufferSequence::const_iterator iter - = handler_op->buffers_.begin(); - typename MutableBufferSequence::const_iterator end - = handler_op->buffers_.end(); - while (iter != end) - { - boost::asio::mutable_buffer buffer(*iter); - boost::asio::buffer_cast<char*>(buffer); - ++iter; - } -#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) - - // Check for the end-of-file condition. - boost::system::error_code ec(last_error, - boost::asio::error::get_system_category()); - if (!ec && bytes_transferred == 0 || last_error == ERROR_HANDLE_EOF) - { - ec = boost::asio::error::eof; - } - - // Make a copy of the handler so that the memory can be deallocated before - // the upcall is made. - Handler handler(handler_op->handler_); - - // Free the memory associated with the handler. - ptr.reset(); - - // Call the handler. - boost_asio_handler_invoke_helpers::invoke( - bind_handler(handler, ec, bytes_transferred), &handler); - } - - static void destroy_impl(operation* op) - { - // Take ownership of the operation object. - typedef read_operation<MutableBufferSequence, Handler> op_type; - op_type* handler_op(static_cast<op_type*>(op)); - typedef boost::asio::detail::handler_alloc_traits< - Handler, op_type> alloc_traits; - boost::asio::detail::handler_ptr<alloc_traits> ptr( - handler_op->handler_, handler_op); - - // A sub-object of the handler may be the true owner of the memory - // associated with the handler. Consequently, a local copy of the handler - // is required to ensure that any owning sub-object remains valid until - // after we have deallocated the memory here. - Handler handler(handler_op->handler_); - (void)handler; - - // Free the memory associated with the handler. - ptr.reset(); - } - - boost::asio::io_service::work work_; - MutableBufferSequence buffers_; - Handler handler_; - }; - - // Start an asynchronous read. The buffer for the data being received must be - // valid for the lifetime of the asynchronous operation. - template <typename MutableBufferSequence, typename Handler> - void async_read_some(implementation_type& impl, - const MutableBufferSequence& buffers, Handler handler) - { - async_read_some_at(impl, 0, buffers, handler); - } - - // Start an asynchronous read at a specified offset. The buffer for the data - // being received must be valid for the lifetime of the asynchronous - // operation. - template <typename MutableBufferSequence, typename Handler> - void async_read_some_at(implementation_type& impl, boost::uint64_t offset, - const MutableBufferSequence& buffers, Handler handler) - { - if (!is_open(impl)) - { - this->get_io_service().post(bind_handler(handler, - boost::asio::error::bad_descriptor, 0)); - return; - } - - // Update the ID of the thread from which cancellation is safe. - if (impl.safe_cancellation_thread_id_ == 0) - impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId(); - else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId()) - impl.safe_cancellation_thread_id_ = ~DWORD(0); - - // Allocate and construct an operation to wrap the handler. - typedef read_operation<MutableBufferSequence, Handler> value_type; - typedef handler_alloc_traits<Handler, value_type> alloc_traits; - raw_handler_ptr<alloc_traits> raw_ptr(handler); - handler_ptr<alloc_traits> ptr(raw_ptr, iocp_service_, buffers, handler); - - // Find first buffer of non-zero length. - boost::asio::mutable_buffer buffer; - typename MutableBufferSequence::const_iterator iter = buffers.begin(); - typename MutableBufferSequence::const_iterator end = buffers.end(); - for (DWORD i = 0; iter != end; ++iter, ++i) - { - buffer = boost::asio::mutable_buffer(*iter); - if (boost::asio::buffer_size(buffer) != 0) - break; - } - - // A request to receive 0 bytes on a stream handle is a no-op. - if (boost::asio::buffer_size(buffer) == 0) - { - boost::asio::io_service::work work(this->get_io_service()); - ptr.reset(); - boost::system::error_code error; - iocp_service_.post(bind_handler(handler, error, 0)); - return; - } - - // Read some data. - DWORD bytes_transferred = 0; - ptr.get()->Offset = offset & 0xFFFFFFFF; - ptr.get()->OffsetHigh = (offset >> 32) & 0xFFFFFFFF; - BOOL ok = ::ReadFile(impl.handle_, - boost::asio::buffer_cast<LPVOID>(buffer), - static_cast<DWORD>(boost::asio::buffer_size(buffer)), - &bytes_transferred, ptr.get()); - DWORD last_error = ::GetLastError(); - if (!ok && last_error != ERROR_IO_PENDING && last_error != ERROR_MORE_DATA) - { - boost::asio::io_service::work work(this->get_io_service()); - ptr.reset(); - boost::system::error_code ec(last_error, - boost::asio::error::get_system_category()); - iocp_service_.post(bind_handler(handler, ec, bytes_transferred)); - } - else - { - ptr.release(); - } - } - -private: - // Prevent the use of the null_buffers type with this service. - size_t write_some(implementation_type& impl, - const null_buffers& buffers, boost::system::error_code& ec); - size_t write_some_at(implementation_type& impl, boost::uint64_t offset, - const null_buffers& buffers, boost::system::error_code& ec); - template <typename Handler> - void async_write_some(implementation_type& impl, - const null_buffers& buffers, Handler handler); - template <typename Handler> - void async_write_some_at(implementation_type& impl, boost::uint64_t offset, - const null_buffers& buffers, Handler handler); - size_t read_some(implementation_type& impl, - const null_buffers& buffers, boost::system::error_code& ec); - size_t read_some_at(implementation_type& impl, boost::uint64_t offset, - const null_buffers& buffers, boost::system::error_code& ec); - template <typename Handler> - void async_read_some(implementation_type& impl, - const null_buffers& buffers, Handler handler); - template <typename Handler> - void async_read_some_at(implementation_type& impl, boost::uint64_t offset, - const null_buffers& buffers, Handler handler); - - // Helper function to close a handle when the associated object is being - // destroyed. - void close_for_destruction(implementation_type& impl) - { - if (is_open(impl)) - { - ::CloseHandle(impl.handle_); - impl.handle_ = INVALID_HANDLE_VALUE; - impl.safe_cancellation_thread_id_ = 0; - } - } - - // The IOCP service used for running asynchronous operations and dispatching - // handlers. - win_iocp_io_service& iocp_service_; - - // Mutex to protect access to the linked list of implementations. - boost::asio::detail::mutex mutex_; - - // The head of a linked list of all implementations. - implementation_type* impl_list_; -}; - -} // namespace detail -} // namespace asio -} // namespace boost - -#endif // defined(BOOST_ASIO_HAS_IOCP) - -#include <boost/asio/detail/pop_options.hpp> - -#endif // BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_SERVICE_HPP |