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executionthread.cpp
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executionthread.cpp
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#include "executionthread.h"
#include "sequence.h"
#include "instruction.h"
#include "nsscheme.h"
#include "settingsdialog.h"
#include "bisonproxy.h"
#include <QTimer>
ExecutionThread::ExecutionThread(NSScheme *_scheme):
QThread(0), scheme(_scheme), m_execution(false), singlestep(false)
{
connect(this,SIGNAL(getInput(ExecutionThread*,const QString&,const QString&,const QString&)),
scheme,SLOT(getInput(ExecutionThread*,const QString&,const QString&,const QString&)),Qt::BlockingQueuedConnection);
connect(this,SIGNAL(showMessage(ExecutionThread*,const QString&,const QString&)),
scheme,SLOT(showMessage(ExecutionThread*,const QString&,const QString&)),Qt::BlockingQueuedConnection);
connect(scheme,SIGNAL(closing()),this,SLOT(on_scheme_closing()));
scheme->assignArraySizes();
}
ExecutionThread::~ExecutionThread()
{
disconnect(this,SIGNAL(getInput(ExecutionThread*,const QString&,const QString&,const QString&)),
scheme,SLOT(getInput(ExecutionThread*,const QString&,const QString&,const QString&)));
disconnect(this,SIGNAL(showMessage(ExecutionThread*,const QString&,const QString&)),
scheme,SLOT(showMessage(ExecutionThread*,const QString&,const QString&)));
}
void ExecutionThread::on_scheme_closing()
{
stopSchemeExecution();
executeNextStep();
}
void ExecutionThread::showMessage(const QString& caption, const QString& message)
{
emit showMessage(this, caption, message);
}
int ExecutionThread::getIntegerInputValue(const QString& caption, const QString& message)
{
qDebug("[ENTER] ExecutionThread::getIntegerInputValue");
emit getInput(this,"int",caption,message);
int result = inputValue.toInt();
qDebug(QString("[EXIT] ExecutionThread::getIntegerInputValue return value=%1").arg(result).toLocal8Bit());
return result;
}
double ExecutionThread::getDoubleInputValue(const QString& caption, const QString& message)
{
qDebug("[ENTER] ExecutionThread::getDoubleInputValue");
emit getInput(this,"double",caption,message);
double result = inputValue.toDouble();
qDebug(QString("[EXIT] ExecutionThread::getDoubleInputValue return value=%1").arg(result).toLocal8Bit());
return result;
}
void ExecutionThread::stopSchemeExecution()
{
m_execution = false;
}
bool ExecutionThread::isSingleStepping() const
{
return singlestep;
}
void ExecutionThread::setSingleStepping(bool v)
{
singlestep = v;
}
void ExecutionThread::run()
{
Sequence *seq = scheme->instructions();
if (seq->count() > 0) {
Instruction *i = seq->instructionAt(0);
m_execution = true;
try {
bool continue_execution;
do {
if (i) do {
qDebug(i->toString().toLocal8Bit());
if (qobject_cast<Sequence*>(i) == 0) {
i->setRunning(true);
if (singlestep)
waitForNextStep();
else
msleep(settingsDialog->executionSleep());
}
bool shouldwait = false;
i = i->execute(this, &shouldwait);
if (shouldwait)
waitForNextStep();
} while ((i != 0) && m_execution);
if (!i) { // zakończyliśmy wykonywania schematu jako wywolania procedury
Instruction *caller = 0;
continue_execution = loadExecutionFrame(caller, i);
//continue_execution = i != 0;
if (caller) {
qDebug(QString("return from call to '%1'").arg(caller->contents()).toLocal8Bit());
caller->setRunning(false);
}
if (i)
qDebug(QString("next instruction is '%1'").arg(i->contents()).toLocal8Bit());
} else
continue_execution = false;
// if (było wywołanie procedury)
// odtwórz ramkę: przywróć stare wskaźniki zmiennym,
// znajdź następną instrukcję w poprzednim schemacie
// else
} while (continue_execution);
} catch(long ex) {
qDebug() << "Exception: " << ex;
showMessage(tr("Execution failed!"), tr("There was a runtime error during scheme exection"));
stopSchemeExecution();
}
if (i != 0) {
i->setRunning(false);
}
}
}
void ExecutionThread::waitForNextStep()
{
semaphore.acquire();
}
void ExecutionThread::executeNextStep()
{
semaphore.release();
}
void ExecutionThread::saveExecutionFrame(Instruction *i, Instruction *c, NSScheme *s)
{
QStringList args = s->schemeArguments();
ProgramVariables *vars = s->variables();
Frame f(i,c,s);
foreach (QString a, args) {
f.varsSet.insert(vars->map()->value(a));
}
foreach (QString a, args) {
f.valueMap.insert(a, vars->map()->value(a)->v);
}
frameStack.push(f);
}
bool ExecutionThread::loadExecutionFrame(Instruction *&caller, Instruction *&next)
{
if (frameStack.empty()) {
caller = 0;
next = 0;
return false;
} else {
Frame f = frameStack.pop();
caller = f.caller;
foreach (ident_val_t *id, f.varsSet) {
f.calledScheme->variables()->map()->insert(id->ident, id);
}
foreach (QString name, f.valueMap.keys()) {
if (!f.calledScheme->isArgumentByRef(name))
f.calledScheme->variables()->map()->value(name)->v = f.valueMap.value(name);
}
next = f.instr;
return true;
}
}