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# cmsgheap.h

    00001 //==========================================================================
    00002 //  CMSGHEAP.H - part of
    00003 //                     OMNeT++/OMNEST
    00004 //            Discrete System Simulation in C++
    00005 //
    00006 //
    00007 //  Declaration of the following classes:
    00008 //    cMessageHeap : future event set, implemented as heap
    00009 //
    00010 //==========================================================================
    00011
    00012 /*--------------------------------------------------------------*
    00013   Copyright (C) 1992-2005 Andras Varga
    00014
    00015   This file is distributed WITHOUT ANY WARRANTY. See the file
    00016   `license' for details on this and other legal matters.
    00017 *--------------------------------------------------------------*/
    00018
    00019 #ifndef __CMSGHEAP_H
    00020 #define __CMSGHEAP_H
    00021
    00022 #include "cobject.h"
    00023
    00024 class cMessage;
    00025
    00026
    00034 class SIM_API cMessageHeap : public cObject
    00035 {
    00036   public:
    00042     class Iterator
    00043     {
    00044       private:
    00045         cMessageHeap *q;
    00046         int pos;
    00047
    00048       public:
    00052         Iterator(const cMessageHeap& mh)  {q=const_cast<cMessageHeap*>(&mh);pos=1;}
    00053
    00057         void init(const cMessageHeap& mh) {q=const_cast<cMessageHeap*>(&mh);pos=1;}
    00058
    00062         cMessage *operator()()      {return q->h[pos];}
    00063
    00068         cMessage *operator++(int)   {return pos<=q->n ? q->h[++pos] : NULL;}
    00069
    00073         bool end() const   {return (bool)(pos>q->n);}
    00074     };
    00075
    00076     friend class Iterator;
    00077
    00078   private:
    00079     cMessage **h;             // pointer to the 'heap'  (h[0] always empty)
    00080     int n;                    // number of elements in the heap
    00081     int size;                 // size of allocated h array
    00082     unsigned long insertcntr; // counts insertions
    00083
    00084     // internal
    00085     void shiftup(int from=1);
    00086
    00087   public:
    00090
    00094     cMessageHeap(const cMessageHeap& msgq);
    00095
    00099     cMessageHeap(const char *name=NULL, int size=128);
    00100
    00104     virtual ~cMessageHeap();
    00105
    00110     cMessageHeap& operator=(const cMessageHeap& msgqueue);
    00112
    00115
    00120     virtual cPolymorphic *dup() const  {return new cMessageHeap(*this);}
    00121
    00126     virtual std::string info() const;
    00127
    00132     virtual void forEachChild(cVisitor *v);
    00133
    00134     // no netPack() and netUnpack()
    00136
    00139
    00143     void insert(cMessage *event);
    00144
    00149     cMessage *peekFirst() const;
    00150
    00155     cMessage *getFirst();
    00156
    00161     cMessage *get(cMessage *event);
    00162
    00169     cMessage *peek(int m);
    00170
    00175     void sort();
    00176
    00180     void clear();
    00181
    00185     int length() const {return n;}
    00186
    00190     bool empty() const {return n==0;}
    00192 };
    00193
    00194 #endif
    00195