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/*
* Copyright 2018 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* 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;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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
* OWNER 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.
*
* Authors: Gabe Black
*/
#ifndef __SYSTEMC_EXT_CHANNEL_SC_BUFFER_HH__
#define __SYSTEMC_EXT_CHANNEL_SC_BUFFER_HH__
#include "../core/sc_module.hh" // for sc_gen_unique_name
#include "sc_signal.hh"
namespace sc_core
{
// Having a default value for the WRITER_POLICY parameter is non-standard, but
// matches the Accellera implementation to enable the regression tests.
template <class T, sc_writer_policy WRITER_POLICY=SC_ONE_WRITER>
class sc_buffer : public sc_signal<T, WRITER_POLICY>
{
public:
sc_buffer() : sc_signal<T, WRITER_POLICY>(sc_gen_unique_name("buffer")) {}
explicit sc_buffer(const char *name) :
sc_signal<T, WRITER_POLICY>(sc_gen_unique_name(name))
{}
virtual void
write(const T &t)
{
# if !defined(SC_NO_WRITE_CHECK)
{
this->_checker.checkWriter();
}
# endif
this->m_new_val = t;
this->request_update();
}
sc_buffer<T, WRITER_POLICY> &
operator = (const T &arg)
{
write(arg);
return *this;
}
sc_buffer<T, WRITER_POLICY> &
operator = (const sc_signal<T, WRITER_POLICY> &arg)
{
write(arg.read());
return *this;
}
sc_buffer<T, WRITER_POLICY> &
operator = (const sc_buffer<T, WRITER_POLICY> &arg)
{
write(arg.read());
return *this;
}
virtual const char *kind() const { return "sc_buffer"; }
protected:
virtual void
update()
{
this->m_cur_val = this->m_new_val;
this->_signalChange();
}
private:
// Disabled
sc_buffer(const sc_buffer<T, WRITER_POLICY> &) {}
};
} // namespace sc_core
#endif //__SYSTEMC_EXT_CHANNEL_SC_BUFFER_HH__
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