Examples with Reaction org.lflang.lf.Reaction used on opensource projects

Example 1 with Reaction

use of org.lflang.lf.Reaction in project lingua-franca by lf-lang.

the class FedASTUtils method addNetworkSenderReaction.

/**
 * Add a network sender reaction for a given input port 'source' to
 * source's parent reactor. This reaction will react to the 'source'
 * and then send a message on the network destined for the destinationFederate.
 *
 * @note Used in federated execution
 *
 * @param source The source port instance.
 * @param destination The destination port instance.
 * @param connection The network connection.
 * @param sourceFederate The source federate.
 * @param leftBankIndex The left bank index or -1 if the left reactor is not in a bank.
 * @param leftChannelIndex The left channel index or -1 if the left port is not a multiport.
 * @param destinationFederate The destination federate.
 * @param generator The GeneratorBase instance used to perform some target-specific actions
 * @param coordination One of CoordinationType.DECENTRALIZED or CoordinationType.CENTRALIZED.
 * @param serializer The serializer used on the connection
 */
private static void addNetworkSenderReaction(PortInstance source, PortInstance destination, Connection connection, FederateInstance sourceFederate, int leftBankIndex, int leftChannelIndex, FederateInstance destinationFederate, GeneratorBase generator, CoordinationType coordination, SupportedSerializers serializer) {
    LfFactory factory = LfFactory.eINSTANCE;
    // Assume all the types are the same, so just use the first on the right.
    Type type = EcoreUtil.copy(source.getDefinition().getType());
    VarRef sourceRef = factory.createVarRef();
    VarRef destRef = factory.createVarRef();
    Reactor parent = (Reactor) connection.eContainer();
    Reaction networkSenderReaction = factory.createReaction();
    // These reactions do not require any dependency relationship
    // to other reactions in the container.
    generator.makeUnordered(networkSenderReaction);
    // If the sender or receiver is in a bank of reactors, then we want
    // these reactions to appear only in the federate whose bank ID matches.
    generator.setReactionBankIndex(networkSenderReaction, leftBankIndex);
    // The connection is 'physical' if it uses the ~> notation.
    if (connection.isPhysical()) {
        sourceFederate.outboundP2PConnections.add(destinationFederate);
    } else {
        // to make P2P connections
        if (coordination == CoordinationType.DECENTRALIZED) {
            sourceFederate.outboundP2PConnections.add(destinationFederate);
        }
    }
    // Record this action in the right federate.
    // The ID of the receiving port (rightPort) is the position
    // of the action in this list.
    int receivingPortID = destinationFederate.networkMessageActions.size();
    // Establish references to the involved ports.
    sourceRef.setContainer(source.getParent().getDefinition());
    sourceRef.setVariable(source.getDefinition());
    destRef.setContainer(destination.getParent().getDefinition());
    destRef.setVariable(destination.getDefinition());
    // Configure the sending reaction.
    networkSenderReaction.getTriggers().add(sourceRef);
    networkSenderReaction.setCode(factory.createCode());
    networkSenderReaction.getCode().setBody(generator.generateNetworkSenderBody(sourceRef, destRef, receivingPortID, sourceFederate, leftBankIndex, leftChannelIndex, destinationFederate, InferredType.fromAST(type), connection.isPhysical(), connection.getDelay(), serializer));
    // Add the sending reaction to the parent.
    parent.getReactions().add(networkSenderReaction);
    // Add the network sender reaction to the federate instance's list
    // of network reactions
    sourceFederate.networkReactions.add(networkSenderReaction);
}

Example 2 with Reaction

use of org.lflang.lf.Reaction in project lingua-franca by lf-lang.

the class FedASTUtils method addNetworkOutputControlReaction.

/**
 * Add a network control reaction for a given output port 'source' to
 * source's parent reactor. This reaction will send a port absent
 * message if the status of the output port is absent.
 *
 * @note Used in federated execution
 *
 * @param source The output port of the source federate
 * @param instance The federate instance is used to keep track of all
 *  network reactions and some relevant triggers
 * @param receivingPortID The ID of the receiving port
 * @param channelIndex The channel index of the sending port, if it is a multiport.
 * @param bankIndex The bank index of the sending federate, if it is a bank.
 * @param receivingFedID The ID of destination federate.
 * @param generator The GeneratorBase instance used to perform some target-specific actions
 * @param delay The delay value imposed on the connection using after
 */
private static void addNetworkOutputControlReaction(PortInstance source, FederateInstance instance, int receivingPortID, int bankIndex, int channelIndex, int receivingFedID, GeneratorBase generator, Delay delay) {
    LfFactory factory = LfFactory.eINSTANCE;
    Reaction reaction = factory.createReaction();
    // Top-level reactor.
    Reactor top = source.getParent().getParent().reactorDefinition;
    // If the sender or receiver is in a bank of reactors, then we want
    // these reactions to appear only in the federate whose bank ID matches.
    generator.setReactionBankIndex(reaction, bankIndex);
    // Add the output from the contained reactor as a source to
    // the reaction to preserve precedence order.
    VarRef newPortRef = factory.createVarRef();
    newPortRef.setContainer(source.getParent().getDefinition());
    newPortRef.setVariable(source.getDefinition());
    reaction.getSources().add(newPortRef);
    // Check whether the action already has been created.
    if (instance.networkOutputControlReactionsTrigger == null) {
        // The port has not been created.
        String triggerName = "outputControlReactionTrigger";
        // Find the trigger definition in the reactor definition, which could have been
        // generated for another federate instance if there are multiple instances
        // of the same reactor that are each distinct federates.
        Optional<Action> optTriggerInput = top.getActions().stream().filter(I -> I.getName().equals(triggerName)).findFirst();
        if (optTriggerInput.isEmpty()) {
            // If no trigger with the name "outputControlReactionTrigger" is
            // already added to the reactor definition, we need to create it
            // for the first time. The trigger is a logical action.
            Action newTriggerForControlReactionVariable = factory.createAction();
            newTriggerForControlReactionVariable.setName(triggerName);
            newTriggerForControlReactionVariable.setOrigin(ActionOrigin.LOGICAL);
            top.getActions().add(newTriggerForControlReactionVariable);
            // Now that the variable is created, store it in the federate instance
            instance.networkOutputControlReactionsTrigger = newTriggerForControlReactionVariable;
        } else {
            // If the "outputControlReactionTrigger" trigger is already
            // there, we can re-use it for this new reaction since a single trigger
            // will trigger
            // all network output control reactions.
            instance.networkOutputControlReactionsTrigger = optTriggerInput.get();
        }
    }
    // Add the trigger for all output control reactions to the list of triggers
    VarRef triggerRef = factory.createVarRef();
    triggerRef.setVariable(instance.networkOutputControlReactionsTrigger);
    reaction.getTriggers().add(triggerRef);
    // Generate the code
    reaction.setCode(factory.createCode());
    reaction.getCode().setBody(generator.generateNetworkOutputControlReactionBody(newPortRef, receivingPortID, receivingFedID, bankIndex, channelIndex, delay));
    // Make the reaction unordered w.r.t. other reactions in the top level.
    generator.makeUnordered(reaction);
    // Insert the newly generated reaction after the generated sender and
    // receiver top-level reactions.
    top.getReactions().add(reaction);
    // Add the network output control reaction to the federate instance's list
    // of network reactions
    instance.networkReactions.add(reaction);
}

Example 3 with Reaction

use of org.lflang.lf.Reaction in project lingua-franca by lf-lang.

the class FedASTUtils method findMaxSTP.

/**
 * Find the maximum STP offset for the given 'port'.
 *
 * An STP offset predicate can be nested in contained reactors in
 * the federate.
 * @param port The port to generate the STP list for.
 * @param generator The GeneratorBase instance used to perform some target-specific actions
 * @param reactor The top-level reactor (not the federate reactor)
 * @return The maximum STP as a TimeValue
 */
private static TimeValue findMaxSTP(Variable port, FederateInstance instance, GeneratorBase generator, Reactor reactor) {
    // Find a list of STP offsets (if any exists)
    List<Value> STPList = new LinkedList<>();
    // First, check if there are any connections to contained reactors that
    // need to be handled
    List<Connection> connectionsWithPort = ASTUtils.allConnections(reactor).stream().filter(c -> c.getLeftPorts().stream().anyMatch((VarRef v) -> v.getVariable().equals(port))).collect(Collectors.toList());
    // Find the list of reactions that have the port as trigger or source
    // (could be a variable name)
    List<Reaction> reactionsWithPort = ASTUtils.allReactions(reactor).stream().filter(r -> {
        // Check the triggers of reaction r first
        return r.getTriggers().stream().anyMatch(t -> {
            if (t instanceof VarRef) {
                // Check if the variables match
                return ((VarRef) t).getVariable() == port;
            } else {
                // Not a network port (startup or shutdown)
                return false;
            }
        }) || // Then check the sources of reaction r
        r.getSources().stream().anyMatch(s -> s.getVariable() == port);
    }).collect(Collectors.toList());
    // Find a list of STP offsets (if any exists)
    if (generator.isFederatedAndDecentralized()) {
        for (Reaction r : safe(reactionsWithPort)) {
            if (!instance.contains(r)) {
                continue;
            }
            // If not, assume it is zero
            if (r.getStp() != null) {
                if (r.getStp().getValue().getParameter() != null) {
                    List<Instantiation> instantList = new ArrayList<>();
                    instantList.add(instance.instantiation);
                    STPList.addAll(ASTUtils.initialValue(r.getStp().getValue().getParameter(), instantList));
                } else {
                    STPList.add(r.getStp().getValue());
                }
            }
        }
        // Check the children for STPs as well
        for (Connection c : safe(connectionsWithPort)) {
            VarRef childPort = c.getRightPorts().get(0);
            Reactor childReactor = (Reactor) childPort.getVariable().eContainer();
            // Find the list of reactions that have the port as trigger or
            // source (could be a variable name)
            List<Reaction> childReactionsWithPort = ASTUtils.allReactions(childReactor).stream().filter(r -> r.getTriggers().stream().anyMatch(t -> {
                if (t instanceof VarRef) {
                    // Check if the variables match
                    return ((VarRef) t).getVariable() == childPort.getVariable();
                } else {
                    // Not a network port (startup or shutdown)
                    return false;
                }
            }) || r.getSources().stream().anyMatch(s -> s.getVariable() == childPort.getVariable())).collect(Collectors.toList());
            for (Reaction r : safe(childReactionsWithPort)) {
                if (!instance.contains(r)) {
                    continue;
                }
                // If not, assume it is zero
                if (r.getStp() != null) {
                    if (r.getStp().getValue() instanceof Parameter) {
                        List<Instantiation> instantList = new ArrayList<>();
                        instantList.add(childPort.getContainer());
                        STPList.addAll(ASTUtils.initialValue(r.getStp().getValue().getParameter(), instantList));
                    } else {
                        STPList.add(r.getStp().getValue());
                    }
                }
            }
        }
    }
    return STPList.stream().map(ASTUtils::getLiteralTimeValue).filter(Objects::nonNull).reduce(TimeValue.ZERO, TimeValue::max);
}

Example 4 with Reaction

use of org.lflang.lf.Reaction in project lingua-franca by lf-lang.

the class ASTUtils method getDelayClass.

/**
 * Return a synthesized AST node that represents the definition of a delay
 * reactor. Depending on whether the target supports generics, either this
 * method will synthesize a generic definition and keep returning it upon
 * subsequent calls, or otherwise, it will synthesize a new definition for
 * each new type it hasn't yet created a compatible delay reactor for.
 * @param type The type the delay class must be compatible with.
 * @param generator A code generator.
 */
private static Reactor getDelayClass(Type type, GeneratorBase generator) {
    String className;
    if (generator.getTargetTypes().supportsGenerics()) {
        className = GeneratorBase.GEN_DELAY_CLASS_NAME;
    } else {
        String id = Integer.toHexString(InferredType.fromAST(type).toText().hashCode());
        className = String.format("%s_%s", GeneratorBase.GEN_DELAY_CLASS_NAME, id);
    }
    // Only add class definition if it is not already there.
    Reactor classDef = generator.findDelayClass(className);
    if ((classDef != null)) {
        return classDef;
    }
    Reactor delayClass = factory.createReactor();
    Parameter delayParameter = factory.createParameter();
    Action action = factory.createAction();
    VarRef triggerRef = factory.createVarRef();
    VarRef effectRef = factory.createVarRef();
    Input input = factory.createInput();
    Output output = factory.createOutput();
    VarRef inRef = factory.createVarRef();
    VarRef outRef = factory.createVarRef();
    Reaction r1 = factory.createReaction();
    Reaction r2 = factory.createReaction();
    delayParameter.setName("delay");
    delayParameter.setType(factory.createType());
    delayParameter.getType().setId("time");
    delayParameter.getType().setTime(true);
    Time defaultTime = factory.createTime();
    defaultTime.setUnit(null);
    defaultTime.setInterval(0);
    Value defaultValue = factory.createValue();
    defaultValue.setTime(defaultTime);
    delayParameter.getInit().add(defaultValue);
    // Name the newly created action; set its delay and type.
    action.setName("act");
    action.setMinDelay(factory.createValue());
    action.getMinDelay().setParameter(delayParameter);
    action.setOrigin(ActionOrigin.LOGICAL);
    if (generator.getTargetTypes().supportsGenerics()) {
        action.setType(factory.createType());
        action.getType().setId("T");
    } else {
        action.setType(EcoreUtil.copy(type));
    }
    input.setName("inp");
    input.setType(EcoreUtil.copy(action.getType()));
    output.setName("out");
    output.setType(EcoreUtil.copy(action.getType()));
    // Establish references to the involved ports.
    inRef.setVariable(input);
    outRef.setVariable(output);
    // Establish references to the action.
    triggerRef.setVariable(action);
    effectRef.setVariable(action);
    // Add the action to the reactor.
    delayClass.setName(className);
    delayClass.getActions().add(action);
    // Configure the second reaction, which reads the input.
    r1.getTriggers().add(inRef);
    r1.getEffects().add(effectRef);
    r1.setCode(factory.createCode());
    r1.getCode().setBody(generator.generateDelayBody(action, inRef));
    // Configure the first reaction, which produces the output.
    r2.getTriggers().add(triggerRef);
    r2.getEffects().add(outRef);
    r2.setCode(factory.createCode());
    r2.getCode().setBody(generator.generateForwardBody(action, outRef));
    // Add the reactions to the newly created reactor class.
    // These need to go in the opposite order in case
    // a new input arrives at the same time the delayed
    // output is delivered!
    delayClass.getReactions().add(r2);
    delayClass.getReactions().add(r1);
    // Add a type parameter if the target supports it.
    if (generator.getTargetTypes().supportsGenerics()) {
        TypeParm parm = factory.createTypeParm();
        parm.setLiteral(generator.generateDelayGeneric());
        delayClass.getTypeParms().add(parm);
    }
    delayClass.getInputs().add(input);
    delayClass.getOutputs().add(output);
    delayClass.getParameters().add(delayParameter);
    generator.addDelayClass(delayClass);
    return delayClass;
}

Example 5 with Reaction

use of org.lflang.lf.Reaction in project lingua-franca by lf-lang.

the class ASTUtils method findConflictingConnectionsInModalReactors.

/**
 * Find connections in the given resource that would be conflicting writes if they were not located in mutually
 * exclusive modes.
 *
 * @param resource The AST.
 * @return a list of connections being able to be transformed
 */
public static Collection<Connection> findConflictingConnectionsInModalReactors(Resource resource) {
    var transform = new HashSet<Connection>();
    var reactors = Iterables.filter(IteratorExtensions.toIterable(resource.getAllContents()), Reactor.class);
    for (Reactor reactor : reactors) {
        if (!reactor.getModes().isEmpty()) {
            // Only for modal reactors
            var allWriters = HashMultimap.<Pair<Instantiation, Variable>, EObject>create();
            // Collect destinations
            for (var rea : allReactions(reactor)) {
                for (var eff : rea.getEffects()) {
                    if (eff.getVariable() instanceof Port) {
                        allWriters.put(Tuples.pair(eff.getContainer(), eff.getVariable()), rea);
                    }
                }
            }
            for (var con : ASTUtils.<Connection>collectElements(reactor, featurePackage.getReactor_Connections(), false, true)) {
                for (var port : con.getRightPorts()) {
                    allWriters.put(Tuples.pair(port.getContainer(), port.getVariable()), con);
                }
            }
            // Handle conflicting writers
            for (var key : allWriters.keySet()) {
                var writers = allWriters.get(key);
                if (writers.size() > 1) {
                    // has multiple sources
                    var writerModes = HashMultimap.<Mode, EObject>create();
                    // find modes
                    for (var writer : writers) {
                        if (writer.eContainer() instanceof Mode) {
                            writerModes.put((Mode) writer.eContainer(), writer);
                        } else {
                            writerModes.put(null, writer);
                        }
                    }
                    // Conflicting connection can only be handled if..
                    if (// no writer is on root level (outside of modes) and...
                    !writerModes.containsKey(null) && writerModes.keySet().stream().map(m -> writerModes.get(m)).allMatch(// all writers in a mode are either...
                    writersInMode -> // the only writer or...
                    writersInMode.size() == 1 || // all are reactions and hence ordered
                    writersInMode.stream().allMatch(w -> w instanceof Reaction))) {
                        // Add connections to transform list
                        writers.stream().filter(w -> w instanceof Connection).forEach(c -> transform.add((Connection) c));
                    }
                }
            }
        }
    }
    return transform;
}