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

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35#include "systemc/ext/core/sc_join.hh"
36#include "systemc/ext/core/sc_main.hh"
37#include "systemc/ext/core/sc_process_handle.hh"
38#include "systemc/ext/utils/sc_report_handler.hh"
39
40namespace sc_gem5
41{
42
43class UnwindExceptionReset : public ::sc_core::sc_unwind_exception
44{
45 public:
46 UnwindExceptionReset() { _isReset = true; }
47};
48
49class UnwindExceptionKill : public ::sc_core::sc_unwind_exception
50{

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111
112void
113Process::disable(bool inc_kids)
114{
115 if (inc_kids)
116 forEachKid([](Process *p) { p->disable(true); });
117
118 if (!::sc_core::sc_allow_process_control_corners &&
119 timeoutEvent.scheduled()) {
120 std::string message("attempt to disable a thread with timeout wait: ");
121 message += name();
122 SC_REPORT_ERROR("Undefined process control interaction",
123 message.c_str());
124 }
125
126 _disabled = true;
127}

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233 forEachKid([](Process *p) { p->syncResetOff(true); });
234
235 _syncReset = false;
236}
237
238void
239Process::finalize()
240{
241 for (auto s: staticSensitivities)
242 s->finalize();
243};
244
245void
246Process::run()
247{
248 bool reset;
249 do {
250 reset = false;

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258 } catch (...) {
259 throw;
260 }
261 } while (reset);
262 needsStart(true);
263}
264
265void
266Process::addStatic(StaticSensitivity *s)
267{
268 staticSensitivities.push_back(s);
269}
270
271void
272Process::setDynamic(DynamicSensitivity *s)
273{
274 if (dynamicSensitivity) {
275 dynamicSensitivity->clear();
276 delete dynamicSensitivity;
277 }
278 dynamicSensitivity = s;
279 if (dynamicSensitivity)
280 dynamicSensitivity->finalize();
281}
282
283void
284Process::cancelTimeout()
285{
286 if (timeoutEvent.scheduled())
287 scheduler.deschedule(&timeoutEvent);
288}
289
290void
291Process::setTimeout(::sc_core::sc_time t)
292{
293 cancelTimeout();
294 scheduler.schedule(&timeoutEvent, t);
295}
296
297void
298Process::timeout()
299{
300 // A process is considered timed_out only if it was also waiting for an
301 // event but got a timeout instead.
302 _timedOut = (dynamicSensitivity != nullptr);
303
304 setDynamic(nullptr);
305 if (disabled())
306 return;
307
308 ready();
309}
310
311void
312Process::satisfySensitivity(Sensitivity *s)
313{
314 // If there's a dynamic sensitivity and this wasn't it, ignore.
315 if ((dynamicSensitivity || timeoutEvent.scheduled()) &&
316 dynamicSensitivity != s) {
317 return;
318 }
319
320 _timedOut = false;
321 // This sensitivity should already be cleared by this point, or the event
322 // which triggered it will take care of it.
323 delete dynamicSensitivity;
324 dynamicSensitivity = nullptr;
325 cancelTimeout();
326 ready();
327}
328
329void
330Process::ready()
331{
332 if (disabled())
333 return;

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346 } else {
347 _lastReport = nullptr;
348 }
349}
350
351::sc_core::sc_report *Process::lastReport() const { return _lastReport.get(); }
352
353Process::Process(const char *name, ProcessFuncWrapper *func, bool internal) :
354 ::sc_core::sc_process_b(name), excWrapper(nullptr),
355 timeoutEvent([this]() { this->timeout(); }),
356 func(func), _internal(internal), _timedOut(false), _dontInitialize(false),
357 _needsStart(true), _isUnwinding(false), _terminated(false),
358 _suspended(false), _disabled(false), _syncReset(false), refCount(0),
359 stackSize(::Fiber::DefaultStackSize), dynamicSensitivity(nullptr)
360{
361 _dynamic =
362 (::sc_core::sc_get_status() >
363 ::sc_core::SC_BEFORE_END_OF_ELABORATION);
364 _newest = this;
365}
366
367void
368Process::terminate()
369{
370 _terminated = true;
371 _suspendedReady = false;
372 _suspended = false;
373 _syncReset = false;
374 clearDynamic();
375 cancelTimeout();
376 for (auto s: staticSensitivities) {
377 s->clear();
378 delete s;
379 }
380 staticSensitivities.clear();
381
382 _terminatedEvent.notify();
383
384 for (auto jw: joinWaiters)
385 jw->signal();
386 joinWaiters.clear();
387}
388
389Process *Process::_newest;
390
391void
392throw_it_wrapper(Process *p, ExceptionWrapperBase &exc, bool inc_kids)
393{
394 p->throw_it(exc, inc_kids);
395}
396
397} // namespace sc_gem5