Category : C Source Code
Archive   : AETSK101.ZIP
Filename : SYSQVFNC.H

 
Output of file : SYSQVFNC.H contained in archive : AETSK101.ZIP
/*
sysqvfnc.h

queues of objects of type Qable

copyright (c) 1991 J. Alan Eldridge

history:

< from sysqtmpl.h -- the template version >

10/28/91 created

10/30/91 changed class hierarchy so we now have:

SysQ queue of Ts
SysPriQ priority queue of Ts
SysQP queue of ptrs to T
SysPriQP priority queue of ptrs to T

11/08/91 created this virtual function version...
this has only classes SysQP and SysPriQP
*/

/*
in the virtual function version of SysQ, anything that can
be put on a queue must define operator <, so it can be put
on a priority queue... gotta impose rules>
*/

class Qable {
private:
// nothing right now
public:
virtual int operator<(Qable &) = 0;
};

struct SysQNode {
Qable *data;
SysQNode *next;
SysQNode *prev;
};

class SysQP {
protected:
int nused, nfree, maxnodes;
SysQNode *head, *tail, *free;

SysQNode *getfree(int=1);
void putfree(SysQNode*);

SysQNode *findnode(Qable*);
virtual SysQNode *findpred(Qable*);

void create(SysQNode*);
void insert(SysQNode*, SysQNode*);

int Ins(Qable*);
int Get(Qable* &,int rmv=1);
public:
SysQP(int n=0, int lim=INT_MAX);
virtual ~SysQP();
int Add(Qable*);
int Del(Qable*);
Qable* Get(int rmv=1);
int Cnt()
{ return nused; }
int Max()
{ return maxnodes; }
};

class SysPriQP: public SysQP {
public:
SysPriQP(int n=0,int lim=INT_MAX): SysQP(n,lim)
{ }
int Add(Qable *t)
{ return SysQP::Ins(t); }
};



  3 Responses to “Category : C Source Code
Archive   : AETSK101.ZIP
Filename : SYSQVFNC.H
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

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  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

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