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d580e7c694
* Use nullptr (C++11) instead of NULL. * Put each file into its own namespace declaration. * Remove "using namespace" directives and add scope qualifiers. * Control when beast's implementation of std::equal (C++14) is used. * Tidy up some const declarations. Conflicts: src/ripple_app/shamap/SHAMapSync.cpp src/ripple_app/tx/TransactionEngine.cpp
90 lines
2.5 KiB
C++
90 lines
2.5 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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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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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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bassert (m_pending.get() == 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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private:
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CompletionCounter& operator= (CompletionCounter const&);
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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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beast::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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