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

Example 11 with Action

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

the class FederateInstance method findNearestPhysicalActionTrigger.

/**
 * Find the nearest (shortest) path to a physical action trigger from this
 * 'reaction' in terms of minimum delay.
 *
 * @param reaction The reaction to start with
 * @return The minimum delay found to the nearest physical action and
 *  TimeValue.MAX_VALUE otherwise
 */
public TimeValue findNearestPhysicalActionTrigger(ReactionInstance reaction) {
    TimeValue minDelay = TimeValue.MAX_VALUE;
    for (TriggerInstance<? extends Variable> trigger : reaction.triggers) {
        if (trigger.getDefinition() instanceof Action) {
            Action action = (Action) trigger.getDefinition();
            ActionInstance actionInstance = (ActionInstance) trigger;
            if (action.getOrigin() == ActionOrigin.PHYSICAL) {
                if (actionInstance.getMinDelay().isEarlierThan(minDelay)) {
                    minDelay = actionInstance.getMinDelay();
                }
            } else if (action.getOrigin() == ActionOrigin.LOGICAL) {
                // Follow it upstream inside the reactor
                for (ReactionInstance uReaction : actionInstance.getDependsOnReactions()) {
                    // Avoid a loop
                    if (!Objects.equal(uReaction, reaction)) {
                        TimeValue uMinDelay = actionInstance.getMinDelay().add(findNearestPhysicalActionTrigger(uReaction));
                        if (uMinDelay.isEarlierThan(minDelay)) {
                            minDelay = uMinDelay;
                        }
                    }
                }
            }
        } else if (trigger.getDefinition() instanceof Output) {
            // Outputs of contained reactions
            PortInstance outputInstance = (PortInstance) trigger;
            for (ReactionInstance uReaction : outputInstance.getDependsOnReactions()) {
                TimeValue uMinDelay = findNearestPhysicalActionTrigger(uReaction);
                if (uMinDelay.isEarlierThan(minDelay)) {
                    minDelay = uMinDelay;
                }
            }
        }
    }
    return minDelay;
}

Example 12 with Action

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

the class CGeneratorExtension method initializeTriggerForControlReactions.

/**
 * Generate C code that initializes three critical structures that support
 * network control reactions:
 *  - triggers_for_network_input_control_reactions: These are triggers that are
 *  used at runtime to insert network input control reactions into the
 *  reaction queue. There could be multiple network input control reactions
 *  for one network input at multiple levels in the hierarchy.
 *  - trigger_for_network_output_control_reactions: Triggers for
 *  network output control reactions, which are unique per each output port.
 *  There could be multiple network output control reactions for each network
 *  output port if it is connected to multiple downstream federates.
 *
 * @param instance  The reactor instance that is at any level of the
 *                  hierarchy within the federate.
 * @param federate  The top-level federate
 * @param generator The instance of the CGenerator passed to keep this
 *                  extension function static.
 * @return A string that initializes the aforementioned three structures.
 */
public static StringBuilder initializeTriggerForControlReactions(ReactorInstance instance, FederateInstance federate, CGenerator generator) {
    StringBuilder builder = new StringBuilder();
    // reactor
    if (instance != generator.main) {
        return builder;
    }
    ReactorDecl reactorClass = instance.getDefinition().getReactorClass();
    Reactor reactor = ASTUtils.toDefinition(reactorClass);
    String nameOfSelfStruct = CUtil.reactorRef(instance);
    // Initialize triggers for network input control reactions
    for (Action trigger : federate.networkInputControlReactionsTriggers) {
        // Check if the trigger belongs to this reactor instance
        if (ASTUtils.allReactions(reactor).stream().anyMatch(r -> {
            return r.getTriggers().stream().anyMatch(t -> {
                if (t instanceof VarRef) {
                    return ((VarRef) t).getVariable().equals(trigger);
                } else {
                    return false;
                }
            });
        })) {
            // Initialize the triggers_for_network_input_control_reactions for the input
            builder.append("// Add trigger " + nameOfSelfStruct + "->_lf__" + trigger.getName() + " to the global list of network input ports.\n" + "_fed.triggers_for_network_input_control_reactions[" + federate.networkInputControlReactionsTriggers.indexOf(trigger) + "]= &" + nameOfSelfStruct + "" + "->_lf__" + trigger.getName() + ";\n");
        }
    }
    nameOfSelfStruct = CUtil.reactorRef(instance);
    // Initialize the trigger for network output control reactions if it doesn't exist.
    if (federate.networkOutputControlReactionsTrigger != null) {
        builder.append("_fed.trigger_for_network_output_control_reactions=&" + nameOfSelfStruct + "->_lf__outputControlReactionTrigger;\n");
    }
    return builder;
}

Example 13 with Action

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

the class CReactionGenerator method generateIntendedTagInheritence.

/**
 * Generate code that passes existing intended tag to all output ports
 * and actions. This intended tag is the minimum intended tag of the
 * triggering inputs of the reaction.
 *
 * @param body The body of the reaction. Used to check for the DISABLE_REACTION_INITIALIZATION_MARKER.
 * @param reaction The initialization code will be generated for this specific reaction
 * @param decl The reactor that has the reaction
 * @param reactionIndex The index of the reaction relative to other reactions in the reactor, starting from 0
 */
public static String generateIntendedTagInheritence(String body, Reaction reaction, ReactorDecl decl, int reactionIndex, CTypes types, boolean isFederatedAndDecentralized) {
    // Construct the intended_tag inheritance code to go into
    // the body of the function.
    CodeBuilder intendedTagInheritenceCode = new CodeBuilder();
    // Check if the coordination mode is decentralized and if the reaction has any effects to inherit the STP violation
    if (isFederatedAndDecentralized && !(reaction.getEffects() == null || reaction.getEffects().isEmpty())) {
        intendedTagInheritenceCode.pr(String.join("\n", "#pragma GCC diagnostic push", "#pragma GCC diagnostic ignored \"-Wunused-variable\"", "if (self->_lf__reaction_" + reactionIndex + ".is_STP_violated == true) {"));
        intendedTagInheritenceCode.indent();
        intendedTagInheritenceCode.pr(String.join("\n", "// The operations inside this if clause (if any exists) are expensive ", "// and must only be done if the reaction has unhandled STP violation.", "// Otherwise, all intended_tag values are (NEVER, 0) by default.", "", "// Inherited intended tag. This will take the minimum", "// intended_tag of all input triggers", types.getTargetTagType() + " inherited_min_intended_tag = (" + types.getTargetTagType() + ") { .time = FOREVER, .microstep = UINT_MAX };"));
        intendedTagInheritenceCode.pr("// Find the minimum intended tag");
        // value of intended_tag to choose the minimum.
        for (TriggerRef inputTrigger : ASTUtils.convertToEmptyListIfNull(reaction.getTriggers())) {
            if (inputTrigger instanceof VarRef) {
                VarRef inputTriggerAsVarRef = (VarRef) inputTrigger;
                Variable variable = inputTriggerAsVarRef.getVariable();
                String variableName = inputTriggerAsVarRef.getVariable().getName();
                if (variable instanceof Output) {
                    // Output from a contained reactor
                    String containerName = inputTriggerAsVarRef.getContainer().getName();
                    Output outputPort = (Output) variable;
                    if (ASTUtils.isMultiport(outputPort)) {
                        intendedTagInheritenceCode.pr(String.join("\n", "for (int i=0; i < " + containerName + "." + generateWidthVariable(variableName) + "; i++) {", "    if (compare_tags(" + containerName + "." + variableName + "[i]->intended_tag,", "                        inherited_min_intended_tag) < 0) {", "        inherited_min_intended_tag = " + containerName + "." + variableName + "[i]->intended_tag;", "    }", "}"));
                    } else
                        intendedTagInheritenceCode.pr(String.join("\n", "if (compare_tags(" + containerName + "." + variableName + "->intended_tag,", "                    inherited_min_intended_tag) < 0) {", "    inherited_min_intended_tag = " + containerName + "." + variableName + "->intended_tag;", "}"));
                } else if (variable instanceof Port) {
                    // Input port
                    Port inputPort = (Port) variable;
                    if (ASTUtils.isMultiport(inputPort)) {
                        intendedTagInheritenceCode.pr(String.join("\n", "for (int i=0; i < " + generateWidthVariable(variableName) + "; i++) {", "    if (compare_tags(" + variableName + "[i]->intended_tag, inherited_min_intended_tag) < 0) {", "        inherited_min_intended_tag = " + variableName + "[i]->intended_tag;", "    }", "}"));
                    } else {
                        intendedTagInheritenceCode.pr(String.join("\n", "if (compare_tags(" + variableName + "->intended_tag, inherited_min_intended_tag) < 0) {", "    inherited_min_intended_tag = " + variableName + "->intended_tag;", "}"));
                    }
                } else if (variable instanceof Action) {
                    intendedTagInheritenceCode.pr(String.join("\n", "if (compare_tags(" + variableName + "->trigger->intended_tag, inherited_min_intended_tag) < 0) {", "    inherited_min_intended_tag = " + variableName + "->trigger->intended_tag;", "}"));
                }
            }
        }
        if (reaction.getTriggers() == null || reaction.getTriggers().size() == 0) {
            // NOTE: this does not include contained outputs.
            for (Input input : ((Reactor) reaction.eContainer()).getInputs()) {
                intendedTagInheritenceCode.pr(String.join("\n", "if (compare_tags(" + input.getName() + "->intended_tag, inherited_min_intended_tag) > 0) {", "    inherited_min_intended_tag = " + input.getName() + "->intended_tag;", "}"));
            }
        }
        // Once the minimum intended tag has been found,
        // it will be passed down to the port effects
        // of the reaction. Note that the intended tag
        // will not pass on to actions downstream.
        // Last reaction that sets the intended tag for the effect
        // will be seen.
        intendedTagInheritenceCode.pr(String.join("\n", "// All effects inherit the minimum intended tag of input triggers", "if (inherited_min_intended_tag.time != NEVER) {"));
        intendedTagInheritenceCode.indent();
        for (VarRef effect : ASTUtils.convertToEmptyListIfNull(reaction.getEffects())) {
            Variable effectVar = effect.getVariable();
            Instantiation effContainer = effect.getContainer();
            if (effectVar instanceof Input) {
                if (ASTUtils.isMultiport((Port) effectVar)) {
                    intendedTagInheritenceCode.pr(String.join("\n", "for(int i=0; i < " + effContainer.getName() + "." + generateWidthVariable(effectVar.getName()) + "; i++) {", "    " + effContainer.getName() + "." + effectVar.getName() + "[i]->intended_tag = inherited_min_intended_tag;", "}"));
                } else {
                    if (effContainer.getWidthSpec() != null) {
                        // Contained reactor is a bank.
                        intendedTagInheritenceCode.pr(String.join("\n", "for (int bankIndex = 0; bankIndex < self->_lf_" + generateWidthVariable(effContainer.getName()) + "; bankIndex++) {", "    " + effContainer.getName() + "[bankIndex]." + effectVar.getName() + " = &(self->_lf_" + effContainer.getName() + "[bankIndex]." + effectVar.getName() + ");", "}"));
                    } else {
                        // Input to a contained reaction
                        intendedTagInheritenceCode.pr(String.join("\n", "// Don't reset the intended tag of the output port if it has already been set.", effContainer.getName() + "." + effectVar.getName() + "->intended_tag = inherited_min_intended_tag;"));
                    }
                }
            }
        }
        intendedTagInheritenceCode.unindent();
        intendedTagInheritenceCode.pr("}");
        intendedTagInheritenceCode.unindent();
        intendedTagInheritenceCode.pr("#pragma GCC diagnostic pop");
        intendedTagInheritenceCode.pr("}");
    }
    return intendedTagInheritenceCode.toString();
}

Example 14 with Action

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

the class CReactionGenerator method generateInitializationForReaction.

/**
 * Generate necessary initialization code inside the body of the reaction that belongs to reactor decl.
 * @param body The body of the reaction. Used to check for the DISABLE_REACTION_INITIALIZATION_MARKER.
 * @param reaction The initialization code will be generated for this specific reaction
 * @param decl The reactor that has the reaction
 * @param reactionIndex The index of the reaction relative to other reactions in the reactor, starting from 0
 */
public static String generateInitializationForReaction(String body, Reaction reaction, ReactorDecl decl, int reactionIndex, CTypes types, ErrorReporter errorReporter, Instantiation mainDef, boolean isFederatedAndDecentralized, boolean requiresTypes) {
    Reactor reactor = ASTUtils.toDefinition(decl);
    // Construct the reactionInitialization code to go into
    // the body of the function before the verbatim code.
    CodeBuilder reactionInitialization = new CodeBuilder();
    CodeBuilder code = new CodeBuilder();
    // Define the "self" struct.
    String structType = CUtil.selfType(decl);
    // or anything else. No need to declare it.
    if (structType != null) {
        code.pr(String.join("\n", "#pragma GCC diagnostic push", "#pragma GCC diagnostic ignored \"-Wunused-variable\"", structType + "* self = (" + structType + "*)instance_args;"));
    }
    // to not generate it.
    if (body.startsWith(CGenerator.DISABLE_REACTION_INITIALIZATION_MARKER)) {
        code.pr("#pragma GCC diagnostic pop");
        return code.toString();
    }
    // A reaction may send to or receive from multiple ports of
    // a contained reactor. The variables for these ports need to
    // all be declared as fields of the same struct. Hence, we first
    // collect the fields to be defined in the structs and then
    // generate the structs.
    Map<Instantiation, CodeBuilder> fieldsForStructsForContainedReactors = new LinkedHashMap<>();
    // Actions may appear twice, first as a trigger, then with the outputs.
    // But we need to declare it only once. Collect in this data structure
    // the actions that are declared as triggered so that if they appear
    // again with the outputs, they are not defined a second time.
    // That second redefinition would trigger a compile error.
    Set<Action> actionsAsTriggers = new LinkedHashSet<>();
    // defined so that they can be used in the verbatim code.
    for (TriggerRef trigger : ASTUtils.convertToEmptyListIfNull(reaction.getTriggers())) {
        if (trigger instanceof VarRef) {
            VarRef triggerAsVarRef = (VarRef) trigger;
            if (triggerAsVarRef.getVariable() instanceof Port) {
                generatePortVariablesInReaction(reactionInitialization, fieldsForStructsForContainedReactors, triggerAsVarRef, decl, types);
            } else if (triggerAsVarRef.getVariable() instanceof Action) {
                reactionInitialization.pr(generateActionVariablesInReaction((Action) triggerAsVarRef.getVariable(), decl, types));
                actionsAsTriggers.add((Action) triggerAsVarRef.getVariable());
            }
        }
    }
    if (reaction.getTriggers() == null || reaction.getTriggers().size() == 0) {
        // NOTE: this does not include contained outputs.
        for (Input input : reactor.getInputs()) {
            reactionInitialization.pr(generateInputVariablesInReaction(input, decl, types));
        }
    }
    // Define argument for non-triggering inputs.
    for (VarRef src : ASTUtils.convertToEmptyListIfNull(reaction.getSources())) {
        if (src.getVariable() instanceof Port) {
            generatePortVariablesInReaction(reactionInitialization, fieldsForStructsForContainedReactors, src, decl, types);
        } else if (src.getVariable() instanceof Action) {
            // It's a bit odd to read but not be triggered by an action, but
            // OK, I guess we allow it.
            reactionInitialization.pr(generateActionVariablesInReaction((Action) src.getVariable(), decl, types));
            actionsAsTriggers.add((Action) src.getVariable());
        }
    }
    // value that may have been written to that output in an earlier reaction.
    if (reaction.getEffects() != null) {
        for (VarRef effect : reaction.getEffects()) {
            Variable variable = effect.getVariable();
            if (variable instanceof Action) {
                // If it has already appeared as trigger, do not redefine it.
                if (!actionsAsTriggers.contains(effect.getVariable())) {
                    reactionInitialization.pr(CGenerator.variableStructType(variable, decl) + "* " + variable.getName() + " = &self->_lf_" + variable.getName() + ";");
                }
            } else if (effect.getVariable() instanceof Mode) {
                // Mode change effect
                int idx = ASTUtils.allModes(reactor).indexOf((Mode) effect.getVariable());
                String name = effect.getVariable().getName();
                if (idx >= 0) {
                    reactionInitialization.pr("reactor_mode_t* " + name + " = &self->_lf__modes[" + idx + "];\n" + "char _lf_" + name + "_change_type = " + (ModeTransitionType.getModeTransitionType(effect) == ModeTransitionType.HISTORY ? 2 : 1) + ";");
                } else {
                    errorReporter.reportError(reaction, "In generateReaction(): " + name + " not a valid mode of this reactor.");
                }
            } else {
                if (variable instanceof Output) {
                    reactionInitialization.pr(generateOutputVariablesInReaction(effect, decl, errorReporter, requiresTypes));
                } else if (variable instanceof Input) {
                    // It is the input of a contained reactor.
                    generateVariablesForSendingToContainedReactors(reactionInitialization, fieldsForStructsForContainedReactors, effect.getContainer(), (Input) variable);
                } else {
                    errorReporter.reportError(reaction, "In generateReaction(): effect is neither an input nor an output.");
                }
            }
        }
    }
    // generate the structs used for communication to and from contained reactors.
    for (Instantiation containedReactor : fieldsForStructsForContainedReactors.keySet()) {
        String array = "";
        if (containedReactor.getWidthSpec() != null) {
            String containedReactorWidthVar = generateWidthVariable(containedReactor.getName());
            code.pr("int " + containedReactorWidthVar + " = self->_lf_" + containedReactorWidthVar + ";");
            // Windows does not support variables in arrays declared on the stack,
            // so we use the maximum size over all bank members.
            array = "[" + maxContainedReactorBankWidth(containedReactor, null, 0, mainDef) + "]";
        }
        code.pr(String.join("\n", "struct " + containedReactor.getName() + " {", "    " + fieldsForStructsForContainedReactors.get(containedReactor) + "", "} " + containedReactor.getName() + array + ";"));
    }
    // Next generate all the collected setup code.
    code.pr(reactionInitialization.toString());
    code.pr("#pragma GCC diagnostic pop");
    if (reaction.getStp() == null) {
        // Pass down the intended_tag to all input and output effects
        // downstream if the current reaction does not have a STP
        // handler.
        code.pr(generateIntendedTagInheritence(body, reaction, decl, reactionIndex, types, isFederatedAndDecentralized));
    }
    return code.toString();
}