00001 /***************************************************************************** 00002 00003 The following code is derived, directly or indirectly, from the SystemC 00004 source code Copyright (c) 1996-2006 by all Contributors. 00005 All Rights reserved. 00006 00007 The contents of this file are subject to the restrictions and limitations 00008 set forth in the SystemC Open Source License Version 2.4 (the "License"); 00009 You may not use this file except in compliance with such restrictions and 00010 limitations. You may obtain instructions on how to receive a copy of the 00011 License at http://www.systemc.org/. Software distributed by Contributors 00012 under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF 00013 ANY KIND, either express or implied. See the License for the specific 00014 language governing rights and limitations under the License. 00015 00016 *****************************************************************************/ 00017 00018 /***************************************************************************** 00019 00020 sc_event_queue.cpp -- Event Queue Support 00021 00022 Original Author: Stuart Swan, Cadence Inc. 00023 00024 *****************************************************************************/ 00025 00026 /***************************************************************************** 00027 00028 MODIFICATION LOG - modifiers, enter your name, affiliation, date and 00029 changes you are making here. 00030 00031 Name, Affiliation, Date: 00032 Description of Modification: 00033 00034 *****************************************************************************/ 00035 00036 00037 // $Log: sc_event_queue.cpp,v $ 00038 // Revision 1.1.1.1 2006/12/15 20:31:35 acg 00039 // SystemC 2.2 00040 // 00041 // Revision 1.4 2006/01/26 21:00:50 acg 00042 // Andy Goodrich: conversion to use sc_event::notify(SC_ZERO_TIME) instead of 00043 // sc_event::notify_delayed() 00044 // 00045 // Revision 1.3 2006/01/13 18:47:42 acg 00046 // Added $Log command so that CVS comments are reproduced in the source. 00047 // 00048 00049 #include "sysc/communication/sc_event_queue.h" 00050 #include "sysc/kernel/sc_method_process.h" 00051 00052 namespace sc_core { 00053 00054 static int 00055 sc_time_compare( const void* p1, const void* p2 ) 00056 { 00057 const sc_time* t1 = static_cast<const sc_time*>( p1 ); 00058 const sc_time* t2 = static_cast<const sc_time*>( p2 ); 00059 00060 if( *t1 < *t2 ) { 00061 return 1; 00062 } else if( *t1 > *t2 ) { 00063 return -1; 00064 } else { 00065 return 0; 00066 } 00067 } 00068 00069 sc_event_queue::sc_event_queue( sc_module_name name_ ) 00070 : sc_module( name_ ), 00071 m_ppq( 128, sc_time_compare ), 00072 m_pending_delta(0) 00073 { 00074 m_delta=0; 00075 SC_METHOD( fire_event ); 00076 sensitive << m_e; 00077 dont_initialize(); 00078 } 00079 00080 sc_event_queue::~sc_event_queue() 00081 { 00082 while (m_ppq.size() > 0) { 00083 delete m_ppq.extract_top(); 00084 } 00085 } 00086 00087 void sc_event_queue::cancel_all() 00088 { 00089 m_pending_delta = 0; 00090 while( m_ppq.size() > 0 ) 00091 m_ppq.extract_top(); 00092 m_e.cancel(); 00093 } 00094 00095 void sc_event_queue::notify (const sc_time& when) 00096 { 00097 m_delta = sc_delta_count(); 00098 sc_time* t = new sc_time( when+sc_time_stamp() ); 00099 if ( m_ppq.size()==0 || *t < *m_ppq.top() ) { 00100 m_e.notify( when ); 00101 } 00102 m_ppq.insert( t ); 00103 } 00104 00105 void sc_event_queue::fire_event() 00106 { 00107 sc_time* t = m_ppq.extract_top(); 00108 assert( *t==sc_time_stamp() ); 00109 delete t; 00110 00111 if ( m_ppq.size() > 0 ) { 00112 m_e.notify( *m_ppq.top() - sc_time_stamp() ); 00113 } 00114 } 00115 00116 } // namespace sc_core
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