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#include "uscxml/Interpreter.h"
#include "uscxml/interpreter/InterpreterMonitor.h"
#include "uscxml/interpreter/InterpreterImpl.h"
#include "uscxml/interpreter/BasicEventQueue.h"
#include "uscxml/interpreter/BasicDelayedEventQueue.h"
#include "uscxml/PausableDelayedEventQueue.h"
#include <event2/util.h> // for evutil_socket_t
#include <chrono>
#include <mutex>
using namespace uscxml;
class MyPausableDelayedEventQueue;
std::shared_ptr<MyPausableDelayedEventQueue> nestedDelayQueue;
class MyPausableDelayedEventQueue : public PausableDelayedEventQueue {
MyPausableDelayedEventQueue(DelayedEventQueueCallbacks* callbacks) : PausableDelayedEventQueue(callbacks) {
}
std::shared_ptr<DelayedEventQueueImpl> create(DelayedEventQueueCallbacks* callbacks) {
// remember as nestedDelayQueue in global scope
nestedDelayQueue = std::shared_ptr<MyPausableDelayedEventQueue>(new MyPausableDelayedEventQueue(callbacks));
return nestedDelayQueue;
}
};
// from issue 96:
// https://github.com/tklab-tud/uscxml/issues/96
static const char *customDelayedEQ =
"<scxml initial=\"StateShape1\" name=\"ScxmlShape1\" version=\"1.0\" xmlns=\"http://www.w3.org/2005/07/scxml\">"
" <state id=\"StateShape1\">"
" <invoke autoforward=\"true\" type=\"scxml\">"
" <content>"
" <scxml initial=\"StateShape1\" name=\"Include\" version=\"1.0\" xmlns=\"http://www.w3.org/2005/07/scxml\">"
" <state id=\"StateShape1\">"
" <transition event=\"error.*\" target=\"FinalShape1\"/>"
" <state id=\"Step1\">"
" <onentry>"
" <send delay=\"1s\" event=\"Timer2\"/>"
" <log expr=\"'Hello from step1'\"/>"
" </onentry>"
" <transition event=\"Timer2\" target=\"Step2\"/>"
" </state>"
" <state id=\"Step2\">"
" <onentry>"
" <send delay=\"1s\" event=\"Timer2\"/>"
" <log expr=\"'Hello from step2'\"/>"
" </onentry>"
" <transition event=\"Timer2\" target=\"Step1\"/>"
" </state>"
" </state>"
" <final id=\"FinalShape1\"/>"
" </scxml>"
" </content>"
" </invoke>"
" </state>"
" <final id=\"FinalShape1\"/>"
"</scxml>";
bool testPausableEventQueue() {
Interpreter interpreter = Interpreter::fromXML(customDelayedEQ, "");
PausableDelayedEventQueue* queue = new PausableDelayedEventQueue(interpreter.getImpl().get());
ActionLanguage lang;
lang.delayQueue = DelayedEventQueue(std::shared_ptr<DelayedEventQueueImpl>(queue));
interpreter.setActionLanguage(lang);
StateTransitionMonitor mon;
mon.copyToInvokers(true);
interpreter.addMonitor(&mon);
size_t iterations = 10;
int now = time(NULL);
int startedAt = time(NULL);
InterpreterState state = InterpreterState::USCXML_UNDEF;
while (state != USCXML_FINISHED && now - startedAt < 5) {
state = interpreter.step(200);
now = time(NULL);
if (nestedDelayQueue) {
/*
* As soon as we have the nested event queue instantiated, we pause and resume it
* We pause for 500ms, and run for 500ms. This will effectively double the time required
* for delayed events.
* This would usually done in another thread ..
*/
std::cout << "<- pausing" << std::endl;
nestedDelayQueue->pause();
std::this_thread::sleep_for(std::chrono::milliseconds(500));
std::cout << "-> continuing" << std::endl;
nestedDelayQueue->resume();
std::this_thread::sleep_for(std::chrono::milliseconds(500));
if (iterations-- == 0)
return true;
}
}
return true;
}
int main(int argc, char** argv) {
testPausableEventQueue();
}
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