FUResource.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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/**
 * @file FUResource.cc
 *
 * Implementation of prototype of Resource Model:
 * implementation of the abstract FUResource.
 *
 * @author Vladimir Guzma 2006 (vladimir.guzma-no.spam-tut.fi)
 * @note rating: red
 */
 
#include "FUResource.hh"
#include "Application.hh"
#include "Conversion.hh"
#include "InputPSocketResource.hh"
 
/**
 * Constructor defining resource name
 * @param name Name of resource
 */
FUResource::FUResource(const std::string& name, int opCount,
                       int nopSlotWeight, unsigned int initiationInterval) :
    SchedulingResource(name, initiationInterval) , opCount_(opCount),
    nopSlotWeight_(nopSlotWeight) {
}
 
/**
 * Empty destructor
 */
FUResource::~FUResource() {}
 
/**
 * Test if resource FUResource is used in given cycle, meaning
 * InputPSocket or OutputPSocket is in use or ExecutionPipeline
 * is inUse.
 * @param cycle Cycle which to test
 * @return True if FUResource is already used in cycle
 */
bool
FUResource::isInUse(const int cycle) const {
    for (int i = 0; i < dependentResourceGroupCount(); i++) {
        for (int j = 0, count = dependentResourceCount(i); j < count; j++) {
            if (dependentResource(i, j).isInUse(cycle)) {
                return true;
            }
        }
    }
    return false;
}
 
/**
 * Test if resource FUResource is available.
 * Not all of the PSocket are inUse.
 * @param cycle Cycle which to test
 * @return True if FUResource is available in cycle
 */
bool
FUResource::isAvailable(const int cycle) const {
    for (int i = 0; i < dependentResourceGroupCount(); i++) {
        for (int j = 0, count = dependentResourceCount(i); j < count; j++) {
            if (dependentResource(i, j).isInputPSocketResource() ||
                dependentResource(i, j).isOutputPSocketResource()) {
                if (dependentResource(i, j).isAvailable(cycle)) {
                    return true;
                }
            }
        }
    }
    return false;
}
 
/**
 * Assign resource to given node for given cycle
 * @param cycle Cycle to assign
 * @param node MoveNode assigned
 */
void
FUResource::assign(const int, MoveNode&) {
 
    // Implemented in derived classes
    abortWithError("assign of FUResource called!");
}
 
/**
 * Unassign resource from given node for given cycle
 * @param cycle Cycle to remove assignment from
 * @param node MoveNode to remove assignment from
 */
void
FUResource::unassign(const int, MoveNode&) {
 
    // Implemented in derived classes
    abortWithError("unassign of FUResource called!");
}
 
/**
 * Return true if resource can be assigned for given resource in given cycle
 * @param cycle Cycle to test
 * @param node MoveNode to test
 * @return true if node can be assigned to cycle
 */
bool
FUResource::canAssign(const int, const MoveNode&) const {
    // Implemented in derived classes
    abortWithError("canAssign of FUResource called!");
    return false;
}
 
/**
 * Comparison operator.
 * 
 * Favours least used FU's and FU's with less operations.
 */
bool 
FUResource::operator< (const SchedulingResource& other) const {
 
    const FUResource *fur = static_cast<const FUResource*>(&other);
    if (fur == NULL) {
        return false;
    }
 
    if (nopSlotWeight_ < fur->nopSlotWeight_) {
        return true;
    }
 
    if (nopSlotWeight_ > fur->nopSlotWeight_) {
        return false;
    }
 
    if (opCount_ < fur->opCount_) {
        return true;
    } 
    if (opCount_ > fur->opCount_) {
        return false;
    }
 
    // favours FU's with connections to less busses.
    int connCount = 0;
    int connCount2 = 0;
 
    // count the connections.
    for (int i = 0; i < dependentResourceCount(0); i++) {
        SchedulingResource& r = dependentResource(0,i);
        if (dynamic_cast<InputPSocketResource*>(&r)) {
            connCount += r.relatedResourceCount(1);
        } else {
            connCount += r.relatedResourceCount(2);
        }
    }
 
    for (int i = 0; i < other.dependentResourceCount(0); i++) {
        SchedulingResource& r = other.dependentResource(0,i);
        if (dynamic_cast<InputPSocketResource*>(&r)) {
            connCount2 += r.relatedResourceCount(1);
        } else {
            connCount2 += r.relatedResourceCount(2);
        }
    }
 
    if (connCount < connCount2) {
        return true;
    } 
    if (connCount > connCount2) {
        return false;
    }
 
    // then use count
    if (useCount() < other.useCount()) {
        return true;
    } 
    if (useCount() > other.useCount()) {
        return false;
    }
 
    return name() < other.name();
}