event.cc revision 13268
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(); }), _triggeredStamp(~0ULL) 51{ 52 if (_basename == "" && ::sc_core::sc_is_running()) 53 _basename = ::sc_core::sc_gen_unique_name("event"); 54 55 parent = pickParentObj(); 56 57 std::string original_name = _basename; 58 _basename = pickUniqueName(parent, _basename); 59 60 if (parent) { 61 Object *obj = Object::getFromScObject(parent); 62 obj->addChildEvent(_sc_event); 63 } else { 64 topLevelEvents.emplace(topLevelEvents.end(), _sc_event); 65 } 66 67 std::string path = parent ? (std::string(parent->name()) + ".") : ""; 68 69 if (original_name != "" && _basename != original_name) { 70 std::string message = path + original_name + 71 ". Latter declaration will be renamed to " + 72 path + _basename; 73 SC_REPORT_WARNING("(W505) object already exists", message.c_str()); 74 } 75 76 _name = path + _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(StaticSensitivities &senses) 131{ 132 for (auto s: senses) 133 s->notify(this); 134} 135 136void 137Event::notify(DynamicSensitivities &senses) 138{ 139 int size = senses.size(); 140 int pos = 0; 141 while (pos < size) { 142 if (senses[pos]->notify(this)) 143 senses[pos] = senses[--size]; 144 else 145 pos++; 146 } 147 senses.resize(size); 148} 149 150void 151Event::notify(ResetSensitivities &senses) 152{ 153 for (auto s: senses) 154 s->notify(this); 155} 156 157void 158Event::notify() 159{ 160 if (scheduler.inUpdate()) { 161 SC_REPORT_ERROR("(E521) immediate notification is not allowed " 162 "during update phase or elaboration", ""); 163 } 164 165 // An immediate notification overrides any pending delayed notification. 166 if (delayedNotify.scheduled()) 167 scheduler.deschedule(&delayedNotify); 168 169 _triggeredStamp = scheduler.changeStamp(); 170 notify(resetSense); 171 notify(staticSenseMethod); 172 notify(dynamicSenseMethod); 173 notify(staticSenseThread); 174 notify(dynamicSenseThread); 175} 176 177void 178Event::notify(const sc_core::sc_time &t) 179{ 180 if (delayedNotify.scheduled()) { 181 if (scheduler.delayed(t) >= delayedNotify.when()) 182 return; 183 184 scheduler.deschedule(&delayedNotify); 185 } 186 scheduler.schedule(&delayedNotify, t); 187} 188 189void 190Event::cancel() 191{ 192 if (delayedNotify.scheduled()) 193 scheduler.deschedule(&delayedNotify); 194} 195 196bool 197Event::triggered() const 198{ 199 return _triggeredStamp == scheduler.changeStamp(); 200} 201 202Events topLevelEvents; 203Events allEvents; 204 205EventsIt 206findEvent(const std::string &name) 207{ 208 EventsIt it; 209 for (it = allEvents.begin(); it != allEvents.end(); it++) 210 if (!strcmp((*it)->name(), name.c_str())) 211 break; 212 213 return it; 214} 215 216} // namespace sc_gem5 217