event.cc revision 13127:d3318222cf09
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#include "systemc/ext/core/sc_main.hh" 41#include "systemc/ext/core/sc_module.hh" 42 43namespace sc_gem5 44{ 45 46Event::Event(sc_core::sc_event *_sc_event) : Event(_sc_event, nullptr) {} 47 48Event::Event(sc_core::sc_event *_sc_event, const char *_basename_cstr) : 49 _sc_event(_sc_event), _basename(_basename_cstr ? _basename_cstr : ""), 50 delayedNotify([this]() { this->notify(); }) 51{ 52 Module *p = currentModule(); 53 54 if (_basename == "" && ::sc_core::sc_is_running()) 55 _basename = ::sc_core::sc_gen_unique_name("event"); 56 57 if (p) 58 parent = p->obj()->sc_obj(); 59 else if (scheduler.current()) 60 parent = scheduler.current(); 61 else 62 parent = nullptr; 63 64 pickUniqueName(parent, _basename); 65 66 if (parent) { 67 Object *obj = Object::getFromScObject(parent); 68 obj->addChildEvent(_sc_event); 69 } else { 70 topLevelEvents.emplace(topLevelEvents.end(), _sc_event); 71 } 72 73 if (parent) 74 _name = std::string(parent->name()) + "." + _basename; 75 else 76 _name = _basename; 77 78 allEvents.emplace(allEvents.end(), _sc_event); 79 80 // Determine if we're in the hierarchy (created once initialization starts 81 // means no). 82} 83 84Event::~Event() 85{ 86 if (parent) { 87 Object *obj = Object::getFromScObject(parent); 88 obj->delChildEvent(_sc_event); 89 } else { 90 EventsIt it = find(topLevelEvents.begin(), topLevelEvents.end(), 91 _sc_event); 92 assert(it != topLevelEvents.end()); 93 std::swap(*it, topLevelEvents.back()); 94 topLevelEvents.pop_back(); 95 } 96 97 EventsIt it = findEvent(_name); 98 std::swap(*it, allEvents.back()); 99 allEvents.pop_back(); 100 101 if (delayedNotify.scheduled()) 102 scheduler.deschedule(&delayedNotify); 103} 104 105const std::string & 106Event::name() const 107{ 108 return _name; 109} 110 111const std::string & 112Event::basename() const 113{ 114 return _basename; 115} 116 117bool 118Event::inHierarchy() const 119{ 120 return _name.length() != 0; 121} 122 123sc_core::sc_object * 124Event::getParentObject() const 125{ 126 return parent; 127} 128 129void 130Event::notify() 131{ 132 // An immediate notification overrides any pending delayed notification. 133 if (delayedNotify.scheduled()) 134 scheduler.deschedule(&delayedNotify); 135 136 auto local_sensitivities = sensitivities; 137 for (auto s: local_sensitivities) 138 s->notify(this); 139} 140 141void 142Event::notify(const sc_core::sc_time &t) 143{ 144 if (delayedNotify.scheduled()) { 145 if (scheduler.delayed(t) >= delayedNotify.when()) 146 return; 147 148 scheduler.deschedule(&delayedNotify); 149 } 150 scheduler.schedule(&delayedNotify, t); 151} 152 153void 154Event::cancel() 155{ 156 if (delayedNotify.scheduled()) 157 scheduler.deschedule(&delayedNotify); 158} 159 160bool 161Event::triggered() const 162{ 163 return false; 164} 165 166Events topLevelEvents; 167Events allEvents; 168 169EventsIt 170findEvent(const std::string &name) 171{ 172 EventsIt it; 173 for (it = allEvents.begin(); it != allEvents.end(); it++) 174 if (!strcmp((*it)->name(), name.c_str())) 175 break; 176 177 return it; 178} 179 180} // namespace sc_gem5 181