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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/strand_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/strand_service.hpp')
m--------- | 3rdParty/Boost | 0 | ||||
-rw-r--r-- | 3rdParty/Boost/boost/asio/detail/strand_service.hpp | 532 |
2 files changed, 0 insertions, 532 deletions
diff --git a/3rdParty/Boost b/3rdParty/Boost new file mode 160000 +Subproject 3bbdbc8cf1996f23d9a366da8bac0f97be6ad79 diff --git a/3rdParty/Boost/boost/asio/detail/strand_service.hpp b/3rdParty/Boost/boost/asio/detail/strand_service.hpp deleted file mode 100644 index 2c89a61..0000000 --- a/3rdParty/Boost/boost/asio/detail/strand_service.hpp +++ /dev/null @@ -1,532 +0,0 @@ -// -// strand_service.hpp -// ~~~~~~~~~~~~~~~~~~ -// -// Copyright (c) 2003-2008 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) -// - -#ifndef BOOST_ASIO_DETAIL_STRAND_SERVICE_HPP -#define BOOST_ASIO_DETAIL_STRAND_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/push_options.hpp> -#include <boost/aligned_storage.hpp> -#include <boost/assert.hpp> -#include <boost/detail/atomic_count.hpp> -#include <boost/intrusive_ptr.hpp> -#include <boost/asio/detail/pop_options.hpp> - -#include <boost/asio/io_service.hpp> -#include <boost/asio/detail/bind_handler.hpp> -#include <boost/asio/detail/call_stack.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/noncopyable.hpp> -#include <boost/asio/detail/service_base.hpp> - -namespace boost { -namespace asio { -namespace detail { - -// Default service implementation for a strand. -class strand_service - : public boost::asio::detail::service_base<strand_service> -{ -public: - class handler_base; - class invoke_current_handler; - class post_next_waiter_on_exit; - - // The underlying implementation of a strand. - class strand_impl - { -#if defined (__BORLANDC__) - public: -#else - private: -#endif - void add_ref() - { - ++ref_count_; - } - - void release() - { - if (--ref_count_ == 0) - delete this; - } - - private: - // Only this service will have access to the internal values. - friend class strand_service; - friend class post_next_waiter_on_exit; - friend class invoke_current_handler; - - strand_impl(strand_service& owner) - : owner_(owner), - current_handler_(0), - first_waiter_(0), - last_waiter_(0), - ref_count_(0) - { - // Insert implementation into linked list of all implementations. - boost::asio::detail::mutex::scoped_lock lock(owner_.mutex_); - next_ = owner_.impl_list_; - prev_ = 0; - if (owner_.impl_list_) - owner_.impl_list_->prev_ = this; - owner_.impl_list_ = this; - } - - ~strand_impl() - { - // Remove implementation from linked list of all implementations. - boost::asio::detail::mutex::scoped_lock lock(owner_.mutex_); - if (owner_.impl_list_ == this) - owner_.impl_list_ = next_; - if (prev_) - prev_->next_ = next_; - if (next_) - next_->prev_= prev_; - next_ = 0; - prev_ = 0; - lock.unlock(); - - if (current_handler_) - { - current_handler_->destroy(); - } - - while (first_waiter_) - { - handler_base* next = first_waiter_->next_; - first_waiter_->destroy(); - first_waiter_ = next; - } - } - - // Mutex to protect access to internal data. - boost::asio::detail::mutex mutex_; - - // The service that owns this implementation. - strand_service& owner_; - - // The handler that is ready to execute. If this pointer is non-null then it - // indicates that a handler holds the lock. - handler_base* current_handler_; - - // The start of the list of waiting handlers for the strand. - handler_base* first_waiter_; - - // The end of the list of waiting handlers for the strand. - handler_base* last_waiter_; - - // Storage for posted handlers. - typedef boost::aligned_storage<128> handler_storage_type; -#if defined(__BORLANDC__) - boost::aligned_storage<128> handler_storage_; -#else - handler_storage_type handler_storage_; -#endif - - // Pointers to adjacent socket implementations in linked list. - strand_impl* next_; - strand_impl* prev_; - - // The reference count on the strand implementation. - boost::detail::atomic_count ref_count_; - -#if !defined(__BORLANDC__) - friend void intrusive_ptr_add_ref(strand_impl* p) - { - p->add_ref(); - } - - friend void intrusive_ptr_release(strand_impl* p) - { - p->release(); - } -#endif - }; - - friend class strand_impl; - - typedef boost::intrusive_ptr<strand_impl> implementation_type; - - // Base class for all handler types. - class handler_base - { - public: - typedef void (*invoke_func_type)(handler_base*, - strand_service&, implementation_type&); - typedef void (*destroy_func_type)(handler_base*); - - handler_base(invoke_func_type invoke_func, destroy_func_type destroy_func) - : next_(0), - invoke_func_(invoke_func), - destroy_func_(destroy_func) - { - } - - void invoke(strand_service& service_impl, implementation_type& impl) - { - invoke_func_(this, service_impl, impl); - } - - void destroy() - { - destroy_func_(this); - } - - protected: - ~handler_base() - { - } - - private: - friend class strand_service; - friend class strand_impl; - friend class post_next_waiter_on_exit; - handler_base* next_; - invoke_func_type invoke_func_; - destroy_func_type destroy_func_; - }; - - // Helper class to allow handlers to be dispatched. - class invoke_current_handler - { - public: - invoke_current_handler(strand_service& service_impl, - const implementation_type& impl) - : service_impl_(service_impl), - impl_(impl) - { - } - - void operator()() - { - impl_->current_handler_->invoke(service_impl_, impl_); - } - - friend void* asio_handler_allocate(std::size_t size, - invoke_current_handler* this_handler) - { - return this_handler->do_handler_allocate(size); - } - - friend void asio_handler_deallocate(void*, std::size_t, - invoke_current_handler*) - { - } - - void* do_handler_allocate(std::size_t size) - { -#if defined(__BORLANDC__) - BOOST_ASSERT(size <= boost::aligned_storage<128>::size); -#else - BOOST_ASSERT(size <= strand_impl::handler_storage_type::size); -#endif - (void)size; - return impl_->handler_storage_.address(); - } - - // The asio_handler_invoke hook is not defined here since the default one - // provides the correct behaviour, and including it here breaks MSVC 7.1 - // in some situations. - - private: - strand_service& service_impl_; - implementation_type impl_; - }; - - // Helper class to automatically enqueue next waiter on block exit. - class post_next_waiter_on_exit - { - public: - post_next_waiter_on_exit(strand_service& service_impl, - implementation_type& impl) - : service_impl_(service_impl), - impl_(impl), - cancelled_(false) - { - } - - ~post_next_waiter_on_exit() - { - if (!cancelled_) - { - boost::asio::detail::mutex::scoped_lock lock(impl_->mutex_); - impl_->current_handler_ = impl_->first_waiter_; - if (impl_->current_handler_) - { - impl_->first_waiter_ = impl_->first_waiter_->next_; - if (impl_->first_waiter_ == 0) - impl_->last_waiter_ = 0; - lock.unlock(); - service_impl_.get_io_service().post( - invoke_current_handler(service_impl_, impl_)); - } - } - } - - void cancel() - { - cancelled_ = true; - } - - private: - strand_service& service_impl_; - implementation_type& impl_; - bool cancelled_; - }; - - // Class template for a waiter. - template <typename Handler> - class handler_wrapper - : public handler_base - { - public: - handler_wrapper(Handler handler) - : handler_base(&handler_wrapper<Handler>::do_invoke, - &handler_wrapper<Handler>::do_destroy), - handler_(handler) - { - } - - static void do_invoke(handler_base* base, - strand_service& service_impl, implementation_type& impl) - { - // Take ownership of the handler object. - typedef handler_wrapper<Handler> this_type; - this_type* h(static_cast<this_type*>(base)); - typedef handler_alloc_traits<Handler, this_type> alloc_traits; - handler_ptr<alloc_traits> ptr(h->handler_, h); - - post_next_waiter_on_exit p1(service_impl, impl); - - // Make a copy of the handler so that the memory can be deallocated before - // the upcall is made. - Handler handler(h->handler_); - - // A handler object must still be valid when the next waiter is posted - // since destroying the last handler might cause the strand object to be - // destroyed. Therefore we create a second post_next_waiter_on_exit object - // that will be destroyed before the handler object. - p1.cancel(); - post_next_waiter_on_exit p2(service_impl, impl); - - // Free the memory associated with the handler. - ptr.reset(); - - // Indicate that this strand is executing on the current thread. - call_stack<strand_impl>::context ctx(impl.get()); - - // Make the upcall. - boost_asio_handler_invoke_helpers::invoke(handler, &handler); - } - - static void do_destroy(handler_base* base) - { - // Take ownership of the handler object. - typedef handler_wrapper<Handler> this_type; - this_type* h(static_cast<this_type*>(base)); - typedef handler_alloc_traits<Handler, this_type> alloc_traits; - handler_ptr<alloc_traits> ptr(h->handler_, h); - - // 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(h->handler_); - (void)handler; - - // Free the memory associated with the handler. - ptr.reset(); - } - - private: - Handler handler_; - }; - - // Construct a new strand service for the specified io_service. - explicit strand_service(boost::asio::io_service& io_service) - : boost::asio::detail::service_base<strand_service>(io_service), - mutex_(), - impl_list_(0) - { - } - - // Destroy all user-defined handler objects owned by the service. - void shutdown_service() - { - // Construct a list of all handlers to be destroyed. - boost::asio::detail::mutex::scoped_lock lock(mutex_); - strand_impl* impl = impl_list_; - handler_base* first_handler = 0; - while (impl) - { - if (impl->current_handler_) - { - impl->current_handler_->next_ = first_handler; - first_handler = impl->current_handler_; - impl->current_handler_ = 0; - } - if (impl->first_waiter_) - { - impl->last_waiter_->next_ = first_handler; - first_handler = impl->first_waiter_; - impl->first_waiter_ = 0; - impl->last_waiter_ = 0; - } - impl = impl->next_; - } - - // Destroy all handlers without holding the lock. - lock.unlock(); - while (first_handler) - { - handler_base* next = first_handler->next_; - first_handler->destroy(); - first_handler = next; - } - } - - // Construct a new strand implementation. - void construct(implementation_type& impl) - { - impl = implementation_type(new strand_impl(*this)); - } - - // Destroy a strand implementation. - void destroy(implementation_type& impl) - { - implementation_type().swap(impl); - } - - // Request the io_service to invoke the given handler. - template <typename Handler> - void dispatch(implementation_type& impl, Handler handler) - { - if (call_stack<strand_impl>::contains(impl.get())) - { - boost_asio_handler_invoke_helpers::invoke(handler, &handler); - } - else - { - // Allocate and construct an object to wrap the handler. - typedef handler_wrapper<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, handler); - - boost::asio::detail::mutex::scoped_lock lock(impl->mutex_); - - if (impl->current_handler_ == 0) - { - // This handler now has the lock, so can be dispatched immediately. - impl->current_handler_ = ptr.release(); - lock.unlock(); - this->get_io_service().dispatch(invoke_current_handler(*this, impl)); - } - else - { - // Another handler already holds the lock, so this handler must join - // the list of waiters. The handler will be posted automatically when - // its turn comes. - if (impl->last_waiter_) - { - impl->last_waiter_->next_ = ptr.get(); - impl->last_waiter_ = impl->last_waiter_->next_; - } - else - { - impl->first_waiter_ = ptr.get(); - impl->last_waiter_ = ptr.get(); - } - ptr.release(); - } - } - } - - // Request the io_service to invoke the given handler and return immediately. - template <typename Handler> - void post(implementation_type& impl, Handler handler) - { - // Allocate and construct an object to wrap the handler. - typedef handler_wrapper<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, handler); - - boost::asio::detail::mutex::scoped_lock lock(impl->mutex_); - - if (impl->current_handler_ == 0) - { - // This handler now has the lock, so can be dispatched immediately. - impl->current_handler_ = ptr.release(); - lock.unlock(); - this->get_io_service().post(invoke_current_handler(*this, impl)); - } - else - { - // Another handler already holds the lock, so this handler must join the - // list of waiters. The handler will be posted automatically when its turn - // comes. - if (impl->last_waiter_) - { - impl->last_waiter_->next_ = ptr.get(); - impl->last_waiter_ = impl->last_waiter_->next_; - } - else - { - impl->first_waiter_ = ptr.get(); - impl->last_waiter_ = ptr.get(); - } - ptr.release(); - } - } - -private: - // Mutex to protect access to the linked list of implementations. - boost::asio::detail::mutex mutex_; - - // The head of a linked list of all implementations. - strand_impl* impl_list_; -}; - -} // namespace detail -} // namespace asio -} // namespace boost - -#if defined(__BORLANDC__) - -namespace boost { - -inline void intrusive_ptr_add_ref( - boost::asio::detail::strand_service::strand_impl* p) -{ - p->add_ref(); -} - -inline void intrusive_ptr_release( - boost::asio::detail::strand_service::strand_impl* p) -{ - p->release(); -} - -} // namespace boost - -#endif // defined(__BORLANDC__) - -#include <boost/asio/detail/pop_options.hpp> - -#endif // BOOST_ASIO_DETAIL_STRAND_SERVICE_HPP |