43 lines
747 B
C++
43 lines
747 B
C++
#ifndef SECONDO_STREAM_ITERATOR_HPP
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#define SECONDO_STREAM_ITERATOR_HPP
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#include "QueryProcessor.h"
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template< typename T >
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struct StreamIterator
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{
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StreamIterator( void* arg ) : valid_(false), element_(0), handle_(arg)
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{
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request();
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}
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bool valid() const { return valid_; }
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T* operator*() const
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{
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return element_;
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}
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StreamIterator& operator++()
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{
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request();
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return *this;
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}
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private:
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void request()
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{
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if ( handle_ )
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{
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element_ = static_cast< T* >( qp->Request( handle_ ).addr );
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valid_ = qp->Received( handle_ );
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}
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}
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bool valid_;
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T* element_;
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void* handle_;
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};
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#endif // SECONDO_STREAM_ITERATOR_HPP
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