79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
// Copyright (C) 2011, 2012 Strahinja Val Markovic <val@markovic.io>
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//
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// This file is part of YouCompleteMe.
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//
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// YouCompleteMe is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// YouCompleteMe is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with YouCompleteMe. If not, see <http://www.gnu.org/licenses/>.
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#ifndef FUTURE_H_NR1U6MZS
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#define FUTURE_H_NR1U6MZS
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#include <boost/thread.hpp>
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#include <boost/make_shared.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/function.hpp>
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namespace YouCompleteMe {
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class Result;
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typedef boost::shared_ptr< boost::packaged_task< void > > VoidTask;
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template< typename T >
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boost::shared_ptr< T > ReturnValueAsShared(
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boost::function< T() > func ) {
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return boost::make_shared< T >( func() );
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}
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template< typename T >
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class Future {
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public:
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Future() {};
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Future( boost::shared_future< T > future )
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: future_( boost::move( future ) ) {}
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bool ResultsReady() {
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// It's OK to return true since GetResults will just return a
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// default-constructed value if the future_ is uninitialized. If we don't
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// return true for this case, any loop waiting on ResultsReady will wait
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// forever.
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if ( future_.get_state() == boost::future_state::uninitialized )
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return true;
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return future_.is_ready();
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}
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void Wait() {
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future_.wait();
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}
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T GetResults() {
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try {
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return future_.get();
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} catch ( boost::future_uninitialized & ) {
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// Do nothing and return a T()
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}
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return T();
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}
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private:
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boost::shared_future< T > future_;
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};
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} // namespace YouCompleteMe
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#endif /* end of include guard: FUTURE_H_NR1U6MZS */
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