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Diffstat (limited to 'ext/systemc/src/sysc/communication/sc_buffer.h')
| -rw-r--r-- | ext/systemc/src/sysc/communication/sc_buffer.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/ext/systemc/src/sysc/communication/sc_buffer.h b/ext/systemc/src/sysc/communication/sc_buffer.h new file mode 100644 index 000000000..e91c1a7c9 --- /dev/null +++ b/ext/systemc/src/sysc/communication/sc_buffer.h @@ -0,0 +1,194 @@ +/***************************************************************************** + + Licensed to Accellera Systems Initiative Inc. (Accellera) under one or + more contributor license agreements. See the NOTICE file distributed + with this work for additional information regarding copyright ownership. + Accellera licenses this file to you under the Apache License, Version 2.0 + (the "License"); you may not use this file except in compliance with the + License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied. See the License for the specific language governing + permissions and limitations under the License. + + *****************************************************************************/ + +/***************************************************************************** + + sc_buffer.h -- The sc_buffer<T> primitive channel class. + Like sc_signal<T>, but *every* write causes an event. + + Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21 + + CHANGE LOG IS AT THE END OF THE FILE + *****************************************************************************/ + +#ifndef SC_BUFFER_H +#define SC_BUFFER_H + + +#include "sysc/communication/sc_signal.h" + +namespace sc_core { + +// ---------------------------------------------------------------------------- +// CLASS : sc_buffer<T> +// +// The sc_buffer<T> primitive channel class. +// ---------------------------------------------------------------------------- + +template< typename T, sc_writer_policy POL = SC_DEFAULT_WRITER_POLICY > +class sc_buffer +: public sc_signal<T,POL> +{ +public: + + // typedefs + + typedef sc_buffer<T,POL> this_type; + typedef sc_signal<T,POL> base_type; + +public: + + // constructors + + sc_buffer() + : base_type( sc_gen_unique_name( "buffer" ) ) + {} + + explicit sc_buffer( const char* name_ ) + : base_type( name_ ) + {} + + sc_buffer( const char* name_, const T& initial_value_ ) + : base_type( name_, initial_value_ ) + {} + + // interface methods + + // write the new value + virtual void write( const T& ); + + + // other methods + + this_type& operator = ( const T& a ) + { write( a ); return *this; } + + this_type& operator = ( const sc_signal_in_if<T>& a ) + { write( a.read() ); return *this; } + + this_type& operator = ( const this_type& a ) + { write( a.read() ); return *this; } + + virtual const char* kind() const + { return "sc_buffer"; } + +protected: + + virtual void update(); + +private: + + // disabled + sc_buffer( const this_type& ); +}; + + +// IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII + +// write the new value + +template< typename T, sc_writer_policy POL > +inline +void +sc_buffer<T,POL>::write( const T& value_ ) +{ + if( !base_type::policy_type::check_write(this,true) ) + return; + + this->m_new_val = value_; + this->request_update(); +} + + +template< typename T, sc_writer_policy POL > +inline +void +sc_buffer<T,POL>::update() +{ + base_type::policy_type::update(); + base_type::do_update(); +} + +} // namespace sc_core + +#endif + +//$Log: sc_buffer.h,v $ +//Revision 1.7 2011/08/26 20:45:39 acg +// Andy Goodrich: moved the modification log to the end of the file to +// eliminate source line number skew when check-ins are done. +// +//Revision 1.6 2011/04/08 18:22:45 acg +// Philipp A. Hartmann: use the context of the primitive channel to get +// the change stamp value. +// +//Revision 1.5 2011/04/05 20:48:09 acg +// Andy Goodrich: changes to make sure that event(), posedge() and negedge() +// only return true if the clock has not moved. +// +//Revision 1.4 2011/04/05 06:15:18 acg +// Philipp A. Hartmann: sc_writer_policy: ignore no-ops in delta check. +// +//Revision 1.3 2011/02/18 20:23:45 acg +// Andy Goodrich: Copyright update. +// +//Revision 1.2 2010/12/07 19:50:36 acg +// Andy Goodrich: addition of writer policies, courtesy of Philipp Hartmann. +// +//Revision 1.1.1.1 2006/12/15 20:20:04 acg +//SystemC 2.3 +// +//Revision 1.8 2006/03/13 20:19:43 acg +// Andy Goodrich: changed sc_event instances into pointers to sc_event instances +// that are allocated as needed. This saves considerable storage for large +// numbers of signals, etc. +// +//Revision 1.7 2006/01/26 21:00:49 acg +// Andy Goodrich: conversion to use sc_event::notify(SC_ZERO_TIME) instead of +// sc_event::notify_delayed() +// +//Revision 1.6 2006/01/24 20:46:31 acg +//Andy Goodrich: changes to eliminate use of deprecated features. For instance, +//using notify(SC_ZERO_TIME) in place of notify_delayed(). +// +//Revision 1.5 2006/01/19 19:18:25 acg +//Andy Goodrich: eliminated check_writer in favor of inline code within the +//write() method since we always execute the check_writer code even when +//check writing is turned off. +// +//Revision 1.4 2006/01/19 00:30:57 acg +//Andy Goodrich: Yet another implementation for disabling write checks on +//signals. This version uses an environment variable, SC_SIGNAL_WRITE_CHECK, +//that when set to DISABLE will turn off write checking. +// +//Revision 1.3 2006/01/13 18:47:20 acg +//Reversed sense of multiwriter signal check. It now defaults to ON unless the +//user defines SC_NO_WRITE_CHEK before inclusion of the file. +// +//Revision 1.2 2006/01/03 23:18:26 acg +//Changed copyright to include 2006. +// +//Revision 1.1.1.1 2005/12/19 23:16:43 acg +//First check in of SystemC 2.1 into its own archive. +// +//Revision 1.9 2005/06/10 22:43:55 acg +//Added CVS change log annotation. +// + +// Taf! |