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Diffstat (limited to 'ext/systemc/src/sysc/communication/sc_event_queue.cpp')
| -rw-r--r-- | ext/systemc/src/sysc/communication/sc_event_queue.cpp | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/ext/systemc/src/sysc/communication/sc_event_queue.cpp b/ext/systemc/src/sysc/communication/sc_event_queue.cpp new file mode 100644 index 000000000..7e1ebc864 --- /dev/null +++ b/ext/systemc/src/sysc/communication/sc_event_queue.cpp @@ -0,0 +1,146 @@ +/***************************************************************************** + + 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_event_queue.cpp -- Event Queue Support + + Original Author: Stuart Swan, Cadence Inc. + + CHANGE LOG IS AT THE END OF THE FILE + *****************************************************************************/ + +#include "sysc/communication/sc_event_queue.h" +#include "sysc/kernel/sc_method_process.h" + +namespace sc_core { + +static int +sc_time_compare( const void* p1, const void* p2 ) +{ + const sc_time* t1 = static_cast<const sc_time*>( p1 ); + const sc_time* t2 = static_cast<const sc_time*>( p2 ); + + if( *t1 < *t2 ) { + return 1; + } else if( *t1 > *t2 ) { + return -1; + } else { + return 0; + } +} + +sc_event_queue::sc_event_queue( sc_module_name name_ ) + : sc_module( name_ ), + m_ppq( 128, sc_time_compare ), + m_e( (std::string(SC_KERNEL_EVENT_PREFIX)+"_event").c_str() ), + m_change_stamp(0), + m_pending_delta(0) +{ + SC_METHOD( fire_event ); + sensitive << m_e; + dont_initialize(); +} + +sc_event_queue::~sc_event_queue() +{ + while (m_ppq.size() > 0) { + delete m_ppq.extract_top(); + } +} + +void sc_event_queue::cancel_all() +{ + m_pending_delta = 0; + while( m_ppq.size() > 0 ) + delete m_ppq.extract_top(); + m_e.cancel(); +} + +void sc_event_queue::notify (const sc_time& when) +{ + m_change_stamp = simcontext()->change_stamp(); + sc_time* t = new sc_time( when+sc_time_stamp() ); + if ( m_ppq.size()==0 || *t < *m_ppq.top() ) { + m_e.notify( when ); + } + m_ppq.insert( t ); +} + +void sc_event_queue::fire_event() +{ + if ( m_ppq.empty() ) { // event has been cancelled + return; + } + sc_time* t = m_ppq.extract_top(); + assert( *t==sc_time_stamp() ); + delete t; + + if ( m_ppq.size() > 0 ) { + m_e.notify( *m_ppq.top() - sc_time_stamp() ); + } +} + +} // namespace sc_core + +// $Log: sc_event_queue.cpp,v $ +// Revision 1.9 2011/08/26 22:45:53 acg +// Torsten Maehne: remove redundant initialization assignment. +// +// Revision 1.8 2011/08/26 21:44:58 acg +// Andy Goodrich: fix internal event naming. +// +// 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 2011/08/24 22:05:35 acg +// Torsten Maehne: initialization changes to remove warnings. +// +// Revision 1.5 2011/04/08 18:22:46 acg +// Philipp A. Hartmann: use the context of the primitive channel to get +// the change stamp value. +// +// Revision 1.4 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 1.3 2011/02/18 20:23:45 acg +// Andy Goodrich: Copyright update. +// +// Revision 1.2 2010/07/22 20:02:30 acg +// Andy Goodrich: bug fixes. +// +// Revision 1.1.1.1 2006/12/15 20:20:04 acg +// SystemC 2.3 +// +// Revision 1.5 2006/11/28 20:30:48 acg +// Andy Goodrich: updated from 2.2 source. sc_event_queue constructors +// collapsed into a single constructor with an optional argument to get +// the sc_module_name stack done correctly. Class name prefixing added +// to sc_semaphore calls to wait() to keep gcc 4.x happy. +// +// Revision 1.4 2006/01/26 21:00:50 acg +// Andy Goodrich: conversion to use sc_event::notify(SC_ZERO_TIME) instead of +// sc_event::notify_delayed() +// +// Revision 1.3 2006/01/13 18:47:42 acg +// Added $Log command so that CVS comments are reproduced in the source. + +// taf |