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Beast includes a lot of code for encapsulating cross-platform differences which are not used or needed by rippled. Additionally, a lot of that code implements functionality that is available from the standard library. This moves away from custom implementations of features that the standard library provides and reduces the number of platform-specific interfaces andfeatures that Beast makes available. Highlights include: * Use std:: instead of beast implementations when possible * Reduce the use of beast::String in public interfaces * Remove Windows-specific COM and Registry code * Reduce the public interface of beast::File * Reduce the public interface of beast::SystemStats * Remove unused sysctl/getsysinfo functions * Remove beast::Logger
99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_ASIO_ASYNCOBJECT_H_INCLUDED
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#define BEAST_ASIO_ASYNCOBJECT_H_INCLUDED
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#include <atomic>
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#include <cassert>
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namespace beast {
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namespace asio {
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/** Mix-in to track when all pending I/O is complete.
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Derived classes must be callable with this signature:
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void asyncHandlersComplete()
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*/
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template <class Derived>
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class AsyncObject
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{
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protected:
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AsyncObject ()
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: m_pending (0)
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{ }
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public:
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~AsyncObject ()
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{
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// Destroying the object with I/O pending? Not a clean exit!
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assert (m_pending.load () == 0);
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}
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/** RAII container that maintains the count of pending I/O.
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Bind this into the argument list of every handler passed
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to an initiating function.
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*/
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class CompletionCounter
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{
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public:
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explicit CompletionCounter (Derived* owner)
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: m_owner (owner)
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{
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++m_owner->m_pending;
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}
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CompletionCounter (CompletionCounter const& other)
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: m_owner (other.m_owner)
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{
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++m_owner->m_pending;
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}
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~CompletionCounter ()
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{
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if (--m_owner->m_pending == 0)
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m_owner->asyncHandlersComplete ();
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}
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CompletionCounter& operator= (CompletionCounter const&) = delete;
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private:
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Derived* m_owner;
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};
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void addReference ()
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{
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++m_pending;
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}
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void removeReference ()
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{
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if (--m_pending)
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(static_cast <Derived *> (this))->asyncHandlersComplete ();
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}
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private:
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// The number of handlers pending.
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std::atomic <int> m_pending;
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};
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}
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}
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#endif
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