#include "exception.hxx"
#include "subsystem_mgr.hxx"
+#include <simgear/math/SGMath.hxx>
-\f
+
+const int SG_MAX_SUBSYSTEM_EXCEPTIONS = 4;\f
////////////////////////////////////////////////////////////////////////
// Implementation of SGSubsystem
////////////////////////////////////////////////////////////////////////
void
SGSubsystem::printTimingInformation ()
{
- SGTimeStamp startTime, endTime;
- long duration;
+ SGTimeStamp startTime;
for ( eventTimeVecIterator i = timingInfo.begin();
i != timingInfo.end();
i++) {
if (i == timingInfo.begin()) {
startTime = i->getTime();
} else {
- endTime = i->getTime();
- duration = (endTime - startTime);
+ SGTimeStamp endTime = i->getTime();
+ SG_LOG(SG_GENERAL, SG_ALERT, "- Getting to timestamp : "
+ << i->getName() << " takes " << endTime - startTime
+ << " sec.");
startTime = endTime;
- SG_LOG(SG_GENERAL, SG_ALERT, "- Getting to timestamp : " << i->getName() << " takes " << duration << " usec.");
}
}
}
-void SGSubsystem::stamp(string name)
+void SGSubsystem::stamp(const string& name)
{
- SGTimeStamp now;
- now.stamp();
- timingInfo.push_back(TimingInfo(name, now));
+ timingInfo.push_back(TimingInfo(name, SGTimeStamp::now()));
}
\f
// Implementation of SGSubsystemGroup.
////////////////////////////////////////////////////////////////////////
-SGSubsystemGroup::SGSubsystemGroup ()
+SGSubsystemGroup::SGSubsystemGroup () :
+ _fixedUpdateTime(-1.0),
+ _updateTimeRemainder(0.0)
{
}
SGSubsystemGroup::~SGSubsystemGroup ()
{
- for (unsigned int i = 0; i < _members.size(); i++)
+ // reverse order to prevent order dependency problems
+ for (unsigned int i = _members.size(); i > 0; i--)
{
- _members[i]->printTimingStatistics();
- delete _members[i];
+ _members[i-1]->printTimingStatistics();
+ delete _members[i-1];
}
}
void
SGSubsystemGroup::unbind ()
{
- for (unsigned int i = 0; i < _members.size(); i++)
- _members[i]->subsystem->unbind();
+ // reverse order to prevent order dependency problems
+ for (unsigned int i = _members.size(); i > 0; i--)
+ _members[i-1]->subsystem->unbind();
}
void
SGSubsystemGroup::update (double delta_time_sec)
{
- for (unsigned int i = 0; i < _members.size(); i++)
- {
- SGTimeStamp start, now;
- start.stamp();
- _members[i]->update(delta_time_sec); // indirect call
- now.stamp();
- long b = ( now - start );
- _members[i]->updateExecutionTime(b);
- double threshold = _members[i]->getTimeWarningThreshold();
- if (( b > threshold ) && (b > 10000)) {
- _members[i]->printTimingInformation(b);
- }
+ int loopCount = 1;
+ // if dt == 0.0, we are paused, so we need to run one iteration
+ // of our members; if we have a fixed update time, we compute a
+ // loop count, and locally adjust dt
+ if ((delta_time_sec > 0.0) && (_fixedUpdateTime > 0.0)) {
+ double localDelta = delta_time_sec + _updateTimeRemainder;
+ loopCount = SGMiscd::roundToInt(localDelta / _fixedUpdateTime);
+ _updateTimeRemainder = delta_time_sec - (loopCount * _fixedUpdateTime);
+ delta_time_sec = _fixedUpdateTime;
}
+
+ while (loopCount-- > 0) {
+ for (unsigned int i = 0; i < _members.size(); i++)
+ {
+ SGTimeStamp timeStamp = SGTimeStamp::now();
+ _members[i]->update(delta_time_sec); // indirect call
+ timeStamp = timeStamp - SGTimeStamp::now();
+ double b = timeStamp.toUSecs();
+ _members[i]->updateExecutionTime(b);
+ double threshold = _members[i]->getTimeWarningThreshold();
+ if (( b > threshold ) && (b > 10000)) {
+ _members[i]->printTimingInformation(b);
+ }
+ }
+ } // of multiple update loop
}
void
}
}
+void
+SGSubsystemGroup::set_fixed_update_time(double dt)
+{
+ _fixedUpdateTime = dt;
+}
+
void
SGSubsystemGroup::Member::printTimingStatistics ()
{
subsystem(0),
min_step_sec(0),
elapsed_sec(0),
- collectTimeStats(false)
+ collectTimeStats(false),
+ exceptionCount(0)
{
}
SGSubsystemGroup::Member::update (double delta_time_sec)
{
elapsed_sec += delta_time_sec;
- if (elapsed_sec >= min_step_sec) {
- if (!subsystem->is_suspended()) {
- subsystem->update(elapsed_sec);
- elapsed_sec = 0;
- }
+ if (elapsed_sec < min_step_sec) {
+ return;
+ }
+
+ if (subsystem->is_suspended()) {
+ return;
+ }
+
+ try {
+ subsystem->update(elapsed_sec);
+ elapsed_sec = 0;
+ } catch (sg_exception& e) {
+ SG_LOG(SG_GENERAL, SG_ALERT, "caught exception processing subsystem:" << name
+ << "\nmessage:" << e.getMessage());
+
+ if (++exceptionCount > SG_MAX_SUBSYSTEM_EXCEPTIONS) {
+ SG_LOG(SG_GENERAL, SG_ALERT, "(exceptionCount=" << exceptionCount <<
+ ", suspending)");
+ subsystem->suspend();
+ }
}
}
void
SGSubsystemMgr::unbind ()
{
- for (int i = 0; i < MAX_GROUPS; i++)
+ // reverse order to prevent order dependency problems
+ for (int i = MAX_GROUPS-1; i >= 0; i--)
_groups[i].unbind();
}