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PIStateMachine::postEvent() now thread-safe and can be recursive

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Пелипенко Иван
2024-08-05 23:25:23 +03:00
parent 6efc962923
commit 33fc334077
2 changed files with 37 additions and 15 deletions
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19
libs/main/state_machine/pistatemachine.h
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@@ -45,11 +45,27 @@ public:
template<typename... Args>
bool postEvent(int event_id, Args... args) {
if (!is_running) return false;
if (in_post.exchange(true)) {
PIMutexLocker ml(nested_mutex);
nested_posts.enqueue([this, event_id, args...] { postEvent(event_id, args...); });
// piCout << "queue nested post";
return false;
}
need_finish = false;
PIScopeExitCall exit_call([this] {
in_post = false;
if (need_finish) {
is_running = false;
if (on_finish) on_finish();
} else {
nested_mutex.lock();
while (nested_posts.isNotEmpty()) {
auto np = nested_posts.dequeue();
nested_mutex.unlock();
np();
nested_mutex.lock();
}
nested_mutex.unlock();
}
});
PIVector<PIStateBase *> active_states;
@@ -71,6 +87,9 @@ private:
void onFinish() override;
bool is_running = false, need_finish = false;
PIQueue<std::function<void()>> nested_posts;
PIMutex nested_mutex;
std::atomic_bool in_post = {false};
std::function<void()> on_finish;
};

33
main.cpp
View File

@@ -28,7 +28,7 @@ void tfunc4(int delim) {
int main(int argc, char * argv[]) {
PIPackedTCP * tcp_s =
/*PIPackedTCP * tcp_s =
PIIODevice::createFromFullPath("ptcp://s::8000")->cast<PIPackedTCP>(); // new PIPackedTCP(PIPackedTCP::Server, {"0.0.0.0:8000"});
PIPackedTCP * tcp_c = PIIODevice::createFromFullPath("ptcp://c:127.0.0.1:8000")
->cast<PIPackedTCP>(); // new PIPackedTCP(PIPackedTCP::Client, {"127.0.0.1:8000"});
@@ -78,7 +78,7 @@ int main(int argc, char * argv[]) {
// piCout << tcp_s->constructFullPath();
delete tcp_s;
delete tcp_c;
return 0;
return 0;*/
/*PITimer timer(tfunc);
// timer.addDelimiter(2);
timer.addDelimiter(40, tfunc4);
@@ -100,6 +100,7 @@ int main(int argc, char * argv[]) {
PIStateLambda * s1 = new PIStateLambda([] { piCout << "+ enter s1"; }, [] { piCout << "- exit s1"; }, "s1");
PIStateLambda * s2 = new PIStateLambda([] { piCout << "+ enter s2"; }, [] { piCout << "- exit s2"; }, "s2");
PIStateLambda * s3 = new PIStateLambda([] { piCout << "+ enter s3"; }, [] { piCout << "- exit s3"; }, "s3");
PIStateLambda * s4 = new PIStateLambda([] { piCout << "+ enter s4"; }, [] { piCout << "- exit s4"; }, "s4");
PIStateLambda * s11 = new PIStateLambda([] { piCout << " + enter s11"; }, [] { piCout << " - exit s11"; }, "s11");
PIStateLambda * s12 = new PIStateLambda([] { piCout << " + enter s12"; }, [] { piCout << " - exit s12"; }, "s12");
PIStateLambda * s13 = new PIStateLambda([] { piCout << " + enter s13"; }, [] { piCout << " - exit s13"; }, "s13");
@@ -111,33 +112,35 @@ int main(int argc, char * argv[]) {
PIStateLambda * s213 = new PIStateLambda([] { piCout << " + enter s213"; }, [] { piCout << " - exit s213"; }, "s213");
PIStateFinal * s214 = new PIStateFinal([] { piCout << " + enter s214 final"; }, "s214f");
root->addStates({s1, s2, s3});
s1->addStates({s11, s12, s13});
s2->addStates({s21, s22, s23});
s21->addStates({s211, s212, s213});
// root->addState(s214);
root->addStates({s1, s2, s3, s4});
// s1->addStates({s11, s12, s13});
// s2->addStates({s21, s22, s23});
// s21->addStates({s211, s212, s213});
// root->addState(s214);
s2->setParallel(true);
root->setInitialState(s2);
root->setInitialState(s1);
s1->setInitialState(s11);
s2->setInitialState(s21);
s21->setInitialState(s213);
// s213->addTransition(s13, meVoid)->addAction([] { piCout << "action transition s21 -> s22"; });
// s3->addTransition(s212, meVoid)->addAction([] { piCout << "action transition s1 -> s213"; });
s2->addTransition(s3, meVoid);
s2->addTimeoutTransition(s3, .5_s);
// s3->addTransition(s1, meIntString)->addGuard([](int i, PIString str) { return i == 2 && str == "hello"; });
s1->addTransition(s2, meVoid)->addAction([root] { root->postEvent(meInt, 1); });
s2->addTransition(s3, meInt)->addGuard([](int i) { return i == 1; })->addAction([root] { root->postEvent(meInt, 2); });
s3->addTransition(s4, meInt)->addGuard([](int i) { return i == 2; })->addAction([root] { root->postEvent(meInt, 3); });
// s2->addTimeoutTransition(s3, .5_s);
// s3->addTransition(s1, meIntString)->addGuard([](int i, PIString str) { return i == 2 && str == "hello"; });
root->start();
piCout << "initial" << root->isRunning() << "\n";
piCout << "active atomics" << root->activeAtomics();
// piCout << "active atomics" << root->activeAtomics();
root->print();
// piCout << "\npost event";
// posted = root->postEvent(meVoid);
// piCout << "posted" << posted << "\n";
piCout << "\npost event";
posted = root->postEvent(meVoid);
piCout << "posted" << posted << "\n";
// piCout << "active atomics" << root->activeAtomics();
piSleep(1.);
root->print();