hla: lift the event loop logic from RTI to HLAFederate.

simgear/hla/HLAFederate.cxx

@@ -1,4 +1,4 @@
-// Copyright (C) 2009 - 2010  Mathias Froehlich - Mathias.Froehlich@web.de
+// Copyright (C) 2009 - 2011  Mathias Froehlich - Mathias.Froehlich@web.de
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Library General Public
@@ -27,7 +27,8 @@
 
 namespace simgear {
 
-HLAFederate::HLAFederate()
+HLAFederate::HLAFederate() :
+    _version(RTI13)
 {
 }
 
@@ -370,7 +371,17 @@ HLAFederate::enableTimeConstrained()
         SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
         return false;
     }
-    return _rtiFederate->enableTimeConstrained();
+
+    if (!_rtiFederate->enableTimeConstrained()) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Could not enable time constrained!");
+        return false;
+    }
+
+    while (!_rtiFederate->getTimeConstrainedEnabled()) {
+        _rtiFederate->processMessage();
+    }
+
+    return true;
 }
 
 bool
@@ -390,7 +401,17 @@ HLAFederate::enableTimeRegulation(const SGTimeStamp& lookahead)
         SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
         return false;
     }
-    return _rtiFederate->enableTimeRegulation(lookahead);
+
+    if (!_rtiFederate->enableTimeRegulation(lookahead)) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Could not enable time regulation!");
+        return false;
+    }
+
+    while (!_rtiFederate->getTimeRegulationEnabled()) {
+        _rtiFederate->processMessage();
+    }
+
+    return true;
 }
 
 bool
@@ -404,23 +425,73 @@ HLAFederate::disableTimeRegulation()
 }
 
 bool
-HLAFederate::timeAdvanceRequestBy(const SGTimeStamp& dt)
+HLAFederate::modifyLookahead(const SGTimeStamp& timeStamp)
 {
     if (!_rtiFederate.valid()) {
         SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
         return false;
     }
-    return _rtiFederate->timeAdvanceRequestBy(dt);
+    return _rtiFederate->modifyLookahead(timeStamp);
 }
 
 bool
-HLAFederate::timeAdvanceRequest(const SGTimeStamp& dt)
+HLAFederate::timeAdvanceBy(const SGTimeStamp& timeIncrement)
 {
     if (!_rtiFederate.valid()) {
         SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
         return false;
     }
-    return _rtiFederate->timeAdvanceRequest(dt);
+
+    SGTimeStamp timeStamp;
+    if (!_rtiFederate->queryFederateTime(timeStamp)) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Could not query federate time!");
+        return false;
+    }
+
+    if (!_rtiFederate->timeAdvanceRequest(timeStamp + timeIncrement)) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Time advance request failed!");
+        return false;
+    }
+
+    return processMessages();
+}
+
+bool
+HLAFederate::timeAdvance(const SGTimeStamp& timeStamp)
+{
+    if (!_rtiFederate.valid()) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
+        return false;
+    }
+
+    if (!_rtiFederate->timeAdvanceRequest(timeStamp)) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Time advance request failed!");
+        return false;
+    }
+
+    return processMessages();
+}
+
+bool
+HLAFederate::timeAdvanceAvailable()
+{
+    if (!_rtiFederate.valid()) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
+        return false;
+    }
+
+    SGTimeStamp timeStamp;
+    if (!_rtiFederate->queryGALT(timeStamp)) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Could not query GALT!");
+        return false;
+    }
+
+    if (!_rtiFederate->timeAdvanceRequestAvailable(timeStamp)) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Time advance request failed!");
+        return false;
+    }
+
+    return processMessages();
 }
 
 bool
@@ -433,16 +504,6 @@ HLAFederate::queryFederateTime(SGTimeStamp& timeStamp)
     return _rtiFederate->queryFederateTime(timeStamp);
 }
 
-bool
-HLAFederate::modifyLookahead(const SGTimeStamp& timeStamp)
-{
-    if (!_rtiFederate.valid()) {
-        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
-        return false;
-    }
-    return _rtiFederate->modifyLookahead(timeStamp);
-}
-
 bool
 HLAFederate::queryLookahead(SGTimeStamp& timeStamp)
 {
@@ -454,13 +515,41 @@ HLAFederate::queryLookahead(SGTimeStamp& timeStamp)
 }
 
 bool
-HLAFederate::tick()
+HLAFederate::processMessage()
 {
     if (!_rtiFederate.valid()) {
         SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
         return false;
     }
-    return _rtiFederate->tick();
+    return _rtiFederate->processMessage();
+}
+
+bool
+HLAFederate::processMessage(const SGTimeStamp& timeout)
+{
+    if (!_rtiFederate.valid()) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
+        return false;
+    }
+    return _rtiFederate->processMessages(timeout.toSecs(), 0);
+}
+
+bool
+HLAFederate::processMessages()
+{
+    if (!_rtiFederate.valid()) {
+        SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
+        return false;
+    }
+
+    while (_rtiFederate->getTimeAdvancePending()) {
+        _rtiFederate->processMessage();
+    }
+
+    // Now flush just what is left
+    while (!_rtiFederate->processMessages(0, 0));
+
+    return true;
 }
 
 bool
@@ -470,7 +559,7 @@ HLAFederate::tick(const double& minimum, const double& maximum)
         SG_LOG(SG_NETWORK, SG_WARN, "HLA: Accessing unconnected federate!");
         return false;
     }
-    return _rtiFederate->tick(minimum, maximum);
+    return _rtiFederate->processMessages(minimum, maximum);
 }
 
 bool

simgear/hla/HLAFederate.hxx

@@ -1,4 +1,4 @@
-// Copyright (C) 2009 - 2010  Mathias Froehlich - Mathias.Froehlich@web.de
+// Copyright (C) 2009 - 2011  Mathias Froehlich - Mathias.Froehlich@web.de
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Library General Public
@@ -82,21 +82,42 @@ public:
     bool resignDestroyFederationExecution();
 
 
+    /// Time management
+
     bool enableTimeConstrained();
     bool disableTimeConstrained();
 
     bool enableTimeRegulation(const SGTimeStamp& lookahead);
     bool disableTimeRegulation();
+    bool modifyLookahead(const SGTimeStamp& lookahead);
 
-    bool timeAdvanceRequestBy(const SGTimeStamp& dt);
+    /// Advance the logical time by the given time increment.
-    bool timeAdvanceRequest(const SGTimeStamp& dt);
+    /// Depending on the time constrained mode, this might
+    /// block until the time advance is granted.
+    bool timeAdvanceBy(const SGTimeStamp& timeIncrement);
+    /// Advance the logical time to the given time.
+    /// Depending on the time constrained mode, this might
+    /// block until the time advance is granted.
+    bool timeAdvance(const SGTimeStamp& timeStamp);
+    /// Advance the logical time as far as time advances are available.
+    /// This call should not block and advance the logical time
+    /// as far as currently possible.
+    bool timeAdvanceAvailable();
 
     bool queryFederateTime(SGTimeStamp& timeStamp);
-    bool modifyLookahead(const SGTimeStamp& timeStamp);
     bool queryLookahead(SGTimeStamp& timeStamp);
 
-    /// Process messages
+    /// Process one messsage
-    bool tick();
+    bool processMessage();
+    /// Process one message but do not wait longer than the relative timeout.
+    bool processMessage(const SGTimeStamp& timeout);
+    /// Process messages until the federate can proceed with the
+    /// next simulation step. That is flush all pending messages and
+    /// depending on the time constrained mode process messages until
+    /// a pending time advance is granted.
+    bool processMessages();
+
+    /// Legacy tick call
     bool tick(const double& minimum, const double& maximum);
 
     class ObjectModelFactory {
@@ -128,13 +149,21 @@ public:
     const HLAInteractionClass* getInteractionClass(const std::string& name) const;
 
 private:
+    HLAFederate(const HLAFederate&);
+    HLAFederate& operator=(const HLAFederate&);
+
+    /// The underlying interface to the rti implementation
     SGSharedPtr<RTIFederate> _rtiFederate;
 
+    /// Parameters required to connect to an rti
     Version _version;
     std::list<std::string> _connectArguments;
 
+    /// Parameters for the federation execution
     std::string _federationExecutionName;
     std::string _federationObjectModel;
+
+    /// Parameters for the federate
     std::string _federateType;
     std::string _federateName;
 

simgear/hla/RTI13Federate.cxx

@@ -579,7 +579,6 @@ private:
 
 RTI13Federate::RTI13Federate(const std::list<std::string>& stringList) :
     _joined(false),
-    _tickTimeout(10),
     _ambassador(new RTI13Ambassador),
     _federateAmbassador(new FederateAmbassador)
 {
@@ -728,13 +727,9 @@ RTI13Federate::registerFederationSynchronizationPoint(const std::string& label,
 }
 
 bool
-RTI13Federate::waitForFederationSynchronizationPointAnnounced(const std::string& label)
+RTI13Federate::getFederationSynchronizationPointAnnounced(const std::string& label)
 {
-    while (!_federateAmbassador->getFederationSynchronizationPointAnnounced(label)) {
+    return _federateAmbassador->getFederationSynchronizationPointAnnounced(label);
-        _ambassador->tick(_tickTimeout, 0);
-        _federateAmbassador->processQueues();
-    }
-    return true;
 }
 
 bool
@@ -766,13 +761,9 @@ RTI13Federate::synchronizationPointAchieved(const std::string& label)
 }
 
 bool
-RTI13Federate::waitForFederationSynchronized(const std::string& label)
+RTI13Federate::getFederationSynchronized(const std::string& label)
 {
-    while (!_federateAmbassador->getFederationSynchronized(label)) {
+    return _federateAmbassador->getFederationSynchronized(label);
-        _ambassador->tick(_tickTimeout, 0);
-        _federateAmbassador->processQueues();
-    }
-    return true;
 }
 
 bool
@@ -816,11 +807,6 @@ RTI13Federate::enableTimeConstrained()
         return false;
     }
 
-    while (!_federateAmbassador->_timeConstrainedEnabled) {
-        _ambassador->tick(_tickTimeout, 0);
-        _federateAmbassador->processQueues();
-    }
-
     return true;
 }
 
@@ -863,6 +849,12 @@ RTI13Federate::disableTimeConstrained()
     return true;
 }
 
+bool
+RTI13Federate::getTimeConstrainedEnabled()
+{
+    return _federateAmbassador->_timeConstrainedEnabled;
+}
+
 bool
 RTI13Federate::enableTimeRegulation(const SGTimeStamp& lookahead)
 {
@@ -910,11 +902,6 @@ RTI13Federate::enableTimeRegulation(const SGTimeStamp& lookahead)
         return false;
     }
 
-    while (!_federateAmbassador->_timeRegulationEnabled) {
-        _ambassador->tick(_tickTimeout, 0);
-        _federateAmbassador->processQueues();
-    }
-
     return true;
 }
 
@@ -958,19 +945,44 @@ RTI13Federate::disableTimeRegulation()
 }
 
 bool
-RTI13Federate::timeAdvanceRequestBy(const SGTimeStamp& dt)
+RTI13Federate::modifyLookahead(const SGTimeStamp& timeStamp)
 {
     if (!_ambassador.valid()) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not disable time regulation at unconnected federate.");
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead.");
         return false;
     }
-
+    try {
-    SGTimeStamp fedTime = _federateAmbassador->_federateTime + dt;
+        _ambassador->modifyLookahead(timeStamp);
-    return timeAdvanceRequest(fedTime);
+    } catch (RTI::InvalidLookahead& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::FederateNotExecutionMember& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::ConcurrentAccessAttempted& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::SaveInProgress& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::RestoreInProgress& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::RTIinternalError& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
+        return false;
+    }
+    return true;
 }
 
 bool
-RTI13Federate::timeAdvanceRequest(const SGTimeStamp& fedTime)
+RTI13Federate::getTimeRegulationEnabled()
+{
+    return _federateAmbassador->_timeRegulationEnabled;
+}
+
+bool
+RTI13Federate::timeAdvanceRequest(const SGTimeStamp& timeStamp)
 {
     if (!_ambassador.valid()) {
         SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not disable time regulation at unconnected federate.");
@@ -978,7 +990,7 @@ RTI13Federate::timeAdvanceRequest(const SGTimeStamp& fedTime)
     }
 
     try {
-        _ambassador->timeAdvanceRequest(fedTime);
+        _ambassador->timeAdvanceRequest(timeStamp);
         _federateAmbassador->_timeAdvancePending = true;
     } catch (RTI::InvalidFederationTime& e) {
         SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
@@ -1012,14 +1024,61 @@ RTI13Federate::timeAdvanceRequest(const SGTimeStamp& fedTime)
         return false;
     }
 
-    while (_federateAmbassador->_timeAdvancePending) {
+    return true;
-        _ambassador->tick(_tickTimeout, 0);
+}
-        _federateAmbassador->processQueues();
+
+bool
+RTI13Federate::timeAdvanceRequestAvailable(const SGTimeStamp& timeStamp)
+{
+    if (!_ambassador.valid()) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not disable time regulation at unconnected federate.");
+        return false;
+    }
+
+    try {
+        _ambassador->timeAdvanceRequestAvailable(timeStamp);
+        _federateAmbassador->_timeAdvancePending = true;
+    } catch (RTI::InvalidFederationTime& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::FederationTimeAlreadyPassed& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::TimeAdvanceAlreadyInProgress& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::EnableTimeRegulationPending& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::EnableTimeConstrainedPending& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::FederateNotExecutionMember& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::ConcurrentAccessAttempted& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::SaveInProgress& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::RestoreInProgress& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
+    } catch (RTI::RTIinternalError& e) {
+        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not resign federation execution: " << e._name << " " << e._reason);
+        return false;
     }
 
     return true;
 }
 
+bool
+RTI13Federate::getTimeAdvancePending()
+{
+    return _federateAmbassador->_timeAdvancePending;
+}
+
 bool
 RTI13Federate::queryFederateTime(SGTimeStamp& timeStamp)
 {
@@ -1049,37 +1108,6 @@ RTI13Federate::queryFederateTime(SGTimeStamp& timeStamp)
     return true;
 }
 
-bool
-RTI13Federate::modifyLookahead(const SGTimeStamp& timeStamp)
-{
-    if (!_ambassador.valid()) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead.");
-        return false;
-    }
-    try {
-        _ambassador->modifyLookahead(timeStamp);
-    } catch (RTI::InvalidLookahead& e) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
-        return false;
-    } catch (RTI::FederateNotExecutionMember& e) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
-        return false;
-    } catch (RTI::ConcurrentAccessAttempted& e) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
-        return false;
-    } catch (RTI::SaveInProgress& e) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
-        return false;
-    } catch (RTI::RestoreInProgress& e) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
-        return false;
-    } catch (RTI::RTIinternalError& e) {
-        SG_LOG(SG_NETWORK, SG_WARN, "RTI: Could not modify lookahead: " << e._name << " " << e._reason);
-        return false;
-    }
-    return true;
-}
-
 bool
 RTI13Federate::queryLookahead(SGTimeStamp& timeStamp)
 {
@@ -1168,7 +1196,7 @@ RTI13Federate::queryLITS(SGTimeStamp& timeStamp)
 }
 
 bool
-RTI13Federate::tick()
+RTI13Federate::processMessage()
 {
     bool result = _ambassador->tick();
     _federateAmbassador->processQueues();
@@ -1176,10 +1204,17 @@ RTI13Federate::tick()
 }
 
 bool
-RTI13Federate::tick(const double& minimum, const double& maximum)
+RTI13Federate::processMessages(const double& minimum, const double& maximum)
 {
-    bool result = _ambassador->tick(minimum, maximum);
+    bool result = _ambassador->tick(minimum, 0);
     _federateAmbassador->processQueues();
+    if (!result)
+        return false;
+    SGTimeStamp timeStamp = SGTimeStamp::now() + SGTimeStamp::fromSec(maximum);
+    do {
+        result = _ambassador->tick(0, 0);
+        _federateAmbassador->processQueues();
+    } while (result && SGTimeStamp::now() <= timeStamp);
     return result;
 }
 

simgear/hla/RTI13Federate.hxx

@@ -48,30 +48,32 @@ public:
 
     /// Synchronization Point handling
     virtual bool registerFederationSynchronizationPoint(const std::string& label, const RTIData& tag);
-    virtual bool waitForFederationSynchronizationPointAnnounced(const std::string& label);
+    virtual bool getFederationSynchronizationPointAnnounced(const std::string& label);
     virtual bool synchronizationPointAchieved(const std::string& label);
-    virtual bool waitForFederationSynchronized(const std::string& label);
+    virtual bool getFederationSynchronized(const std::string& label);
 
     /// Time management
     virtual bool enableTimeConstrained();
     virtual bool disableTimeConstrained();
+    virtual bool getTimeConstrainedEnabled();
 
     virtual bool enableTimeRegulation(const SGTimeStamp& lookahead);
     virtual bool disableTimeRegulation();
+    virtual bool modifyLookahead(const SGTimeStamp& timeStamp);
+    virtual bool getTimeRegulationEnabled();
 
-    virtual bool timeAdvanceRequestBy(const SGTimeStamp& dt);
+    virtual bool timeAdvanceRequest(const SGTimeStamp& timeStamp);
-    virtual bool timeAdvanceRequest(const SGTimeStamp& fedTime);
+    virtual bool timeAdvanceRequestAvailable(const SGTimeStamp& timeStamp);
+    virtual bool getTimeAdvancePending();
 
     virtual bool queryFederateTime(SGTimeStamp& timeStamp);
-    virtual bool modifyLookahead(const SGTimeStamp& timeStamp);
     virtual bool queryLookahead(SGTimeStamp& timeStamp);
-
     virtual bool queryGALT(SGTimeStamp& timeStamp);
     virtual bool queryLITS(SGTimeStamp& timeStamp);
 
     /// Process messages
-    virtual bool tick();
+    virtual bool processMessage();
-    virtual bool tick(const double& minimum, const double& maximum);
+    virtual bool processMessages(const double& minimum, const double& maximum);
 
     virtual RTI13ObjectClass* createObjectClass(const std::string& name, HLAObjectClass* hlaObjectClass);
 
@@ -86,10 +88,6 @@ private:
     RTI::FederateHandle _federateHandle;
     bool _joined;
 
-    /// The timeout for the single callback tick function in
-    /// syncronous operations that need to wait for a callback
-    double _tickTimeout;
-
     /// RTI connection
     SGSharedPtr<RTI13Ambassador> _ambassador;
 

simgear/hla/RTIFederate.hxx

@@ -1,4 +1,4 @@
-// Copyright (C) 2009 - 2010  Mathias Froehlich - Mathias.Froehlich@web.de
+// Copyright (C) 2009 - 2011  Mathias Froehlich - Mathias.Froehlich@web.de
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Library General Public
@@ -49,30 +49,32 @@ public:
 
     /// Synchronization Point handling
     virtual bool registerFederationSynchronizationPoint(const std::string& label, const RTIData& tag) = 0;
-    virtual bool waitForFederationSynchronizationPointAnnounced(const std::string& label) = 0;
+    virtual bool getFederationSynchronizationPointAnnounced(const std::string& label) = 0;
     virtual bool synchronizationPointAchieved(const std::string& label) = 0;
-    virtual bool waitForFederationSynchronized(const std::string& label) = 0;
+    virtual bool getFederationSynchronized(const std::string& label) = 0;
 
     /// Time management
     virtual bool enableTimeConstrained() = 0;
     virtual bool disableTimeConstrained() = 0;
+    virtual bool getTimeConstrainedEnabled() = 0;
 
     virtual bool enableTimeRegulation(const SGTimeStamp& lookahead) = 0;
     virtual bool disableTimeRegulation() = 0;
+    virtual bool modifyLookahead(const SGTimeStamp& timeStamp) = 0;
+    virtual bool getTimeRegulationEnabled() = 0;
 
-    virtual bool timeAdvanceRequestBy(const SGTimeStamp& dt) = 0;
     virtual bool timeAdvanceRequest(const SGTimeStamp& fedTime) = 0;
+    virtual bool timeAdvanceRequestAvailable(const SGTimeStamp& timeStamp) = 0;
+    virtual bool getTimeAdvancePending() = 0;
 
     virtual bool queryFederateTime(SGTimeStamp& timeStamp) = 0;
-    virtual bool modifyLookahead(const SGTimeStamp& timeStamp) = 0;
     virtual bool queryLookahead(SGTimeStamp& timeStamp) = 0;
-
     virtual bool queryGALT(SGTimeStamp& timeStamp) = 0;
     virtual bool queryLITS(SGTimeStamp& timeStamp) = 0;
 
     /// Process messages
-    virtual bool tick() = 0;
+    virtual bool processMessage() = 0;
-    virtual bool tick(const double& minimum, const double& maximum) = 0;
+    virtual bool processMessages(const double& minimum, const double& maximum) = 0;
 
     virtual RTIObjectClass* createObjectClass(const std::string& name, HLAObjectClass* hlaObjectClass) = 0;
     // virtual RTIInteractionClass* createInteractionClass(const std::string& name) = 0;