event.cc revision 13073:71fccb27bace
1/* 2 * Copyright 2018 Google, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer; 8 * redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution; 11 * neither the name of the copyright holders nor the names of its 12 * contributors may be used to endorse or promote products derived from 13 * this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Authors: Gabe Black 28 */ 29 30#include "systemc/core/event.hh" 31 32#include <algorithm> 33#include <cstring> 34#include <utility> 35 36#include "base/logging.hh" 37#include "sim/core.hh" 38#include "systemc/core/module.hh" 39#include "systemc/core/scheduler.hh" 40 41namespace sc_gem5 42{ 43 44Event::Event(sc_core::sc_event *_sc_event) : Event(_sc_event, "") {} 45 46Event::Event(sc_core::sc_event *_sc_event, const char *_basename) : 47 _sc_event(_sc_event), _basename(_basename), 48 delayedNotify([this]() { this->notify(); }) 49{ 50 Module *p = currentModule(); 51 52 if (p) 53 parent = p->obj()->sc_obj(); 54 else if (scheduler.current()) 55 parent = scheduler.current(); 56 else 57 parent = nullptr; 58 59 if (parent) { 60 Object *obj = Object::getFromScObject(parent); 61 obj->addChildEvent(_sc_event); 62 } else { 63 topLevelEvents.emplace(topLevelEvents.end(), _sc_event); 64 } 65 66 if (parent) 67 _name = std::string(parent->name()) + "." + _basename; 68 else 69 _name = _basename; 70 71 allEvents.emplace(allEvents.end(), _sc_event); 72 73 // Determine if we're in the hierarchy (created once initialization starts 74 // means no). 75} 76 77Event::~Event() 78{ 79 if (parent) { 80 Object *obj = Object::getFromScObject(parent); 81 obj->delChildEvent(_sc_event); 82 } else { 83 EventsIt it = find(topLevelEvents.begin(), topLevelEvents.end(), 84 _sc_event); 85 assert(it != topLevelEvents.end()); 86 std::swap(*it, topLevelEvents.back()); 87 topLevelEvents.pop_back(); 88 } 89 90 EventsIt it = findEvent(_name); 91 std::swap(*it, allEvents.back()); 92 allEvents.pop_back(); 93 94 if (delayedNotify.scheduled()) 95 scheduler.deschedule(&delayedNotify); 96} 97 98const std::string & 99Event::name() const 100{ 101 return _name; 102} 103 104const std::string & 105Event::basename() const 106{ 107 return _basename; 108} 109 110bool 111Event::inHierarchy() const 112{ 113 return _name.length() != 0; 114} 115 116sc_core::sc_object * 117Event::getParentObject() const 118{ 119 return parent; 120} 121 122void 123Event::notify() 124{ 125 // An immediate notification overrides any pending delayed notification. 126 if (delayedNotify.scheduled()) 127 scheduler.deschedule(&delayedNotify); 128 129 auto local_sensitivities = sensitivities; 130 for (auto s: local_sensitivities) 131 s->notify(this); 132} 133 134void 135Event::notify(const sc_core::sc_time &t) 136{ 137 if (delayedNotify.scheduled()) { 138 if (scheduler.delayed(t) >= delayedNotify.when()) 139 return; 140 141 scheduler.deschedule(&delayedNotify); 142 } 143 scheduler.schedule(&delayedNotify, t); 144} 145 146void 147Event::cancel() 148{ 149 if (delayedNotify.scheduled()) 150 scheduler.deschedule(&delayedNotify); 151} 152 153bool 154Event::triggered() const 155{ 156 return false; 157} 158 159Events topLevelEvents; 160Events allEvents; 161 162EventsIt 163findEvent(const std::string &name) 164{ 165 EventsIt it; 166 for (it = allEvents.begin(); it != allEvents.end(); it++) 167 if (!strcmp((*it)->name(), name.c_str())) 168 break; 169 170 return it; 171} 172 173} // namespace sc_gem5 174