/* * Copyright (c) 2014, Siemens AG. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef EMBB_DATAFLOW_INTERNAL_SIGNAL_H_ #define EMBB_DATAFLOW_INTERNAL_SIGNAL_H_ #include namespace embb { namespace dataflow { namespace internal { template class Signal { public: Signal() : blank_(true), value_(), clock_(-1) {} Signal(int clock, Type value) : blank_(false), value_(value), clock_(clock) {} explicit Signal(int clock) : blank_(true), value_(), clock_(clock) {} Signal(Signal const & other) : blank_(other.blank_), value_(other.value_), clock_(other.clock_) {} void operator = (Signal const & rhs) { lock_.Lock(); blank_ = rhs.blank_; value_ = rhs.value_; clock_ = rhs.clock_; lock_.Unlock(); } int GetClock() const { return clock_; } bool IsBlank() const { return blank_; } Type const & GetValue() const { return value_; } void Clear() { lock_.Lock(); blank_ = true; clock_ = -1; lock_.Unlock(); } private: bool blank_; Type value_; int clock_; SpinLock lock_; }; } // namespace internal } // namespace dataflow } // namespace embb #endif // EMBB_DATAFLOW_INTERNAL_SIGNAL_H_