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server/cashedisk.cxx File Reference

??? More...

#include "udanax.h"

Include dependency graph for cashedisk.cxx:

Include dependency graph

Go to the source code of this file.

Classes

struct  hashfoo

Defines

#define HASHSIZE   301
#define HASHMULT   754343

Typedefs

typedef hashfoo hashtable

Functions

void inithash ()
 ???

void actuallyreadrawloaffromhash (typeuberrawdiskloaf *loafptr, int blocknumber)
 ???

void writethruhash (typeuberrawdiskloaf *loafptr, int blocknumber)
 ???

void hashcasheclash ()
 ???

int blockisinhash (int blocknumber)
 ???

void addtohash (typeuberrawdiskloaf *loafptr, int blocknumber)
 ???

int hash (int blocknumber)
 ???


Variables

hashtable xhashtable [HASHSIZE]

Detailed Description

???

(to be defined)

Definition in file cashedisk.cxx.

Define Documentation

#define HASHMULT   754343
 

Definition at line 66 of file cashedisk.cxx.

Referenced by hash().

#define HASHSIZE   301
 

Definition at line 65 of file cashedisk.cxx.

Referenced by hash(), and inithash().

Typedef Documentation

typedef struct hashfoo hashtable
 

Function Documentation

void actuallyreadrawloaffromhash (  typeuberrawdiskloaf *  loafptr,
int  blocknumber
) 
 

???

(to be defined)

Definition at line 98 of file cashedisk.cxx.

References actuallyreadrawloaf(), addtohash(), blockisinhash(), hashfoo::urdloaf, and xhashtable. 

00101 {
00102     int temp;
00103     void addtohash(), actuallyreadrawloaf();
00104 
00105 /* L("actuallyreadrawloaffromhash %d \n",blocknumber); */
00106     if (temp = blockisinhash(blocknumber)) {
00107         *loafptr = xhashtable[temp].urdloaf;
00108         return;
00109     }
00110     actuallyreadrawloaf(loafptr, blocknumber);
00111     addtohash(loafptr, blocknumber);
00112 
00113 }

void addtohash (  typeuberrawdiskloaf *  loafptr,
int  blocknumber
) 
 

???

(to be defined)

Definition at line 176 of file cashedisk.cxx.

References hashfoo::blocknumber, hash(), hashcasheclash(), hashfoo::urdloaf, and xhashtable.

Referenced by actuallyreadrawloaffromhash(), and writethruhash(). 

00179 {
00180     int temp = hash(blocknumber);
00181 
00182     if (xhashtable[temp].blocknumber != -1)
00183         hashcasheclash();
00184 
00185     xhashtable[temp].blocknumber = blocknumber;
00186     xhashtable[temp].urdloaf     = *loafptr;
00187 }

int blockisinhash (  int  blocknumber  ) 
 

???

(to be defined)

Definition at line 157 of file cashedisk.cxx.

References hashfoo::blocknumber, hash(), and xhashtable.

Referenced by actuallyreadrawloaffromhash(), and writethruhash(). 

00159 {
00160     int temp = hash(blocknumber);
00161 
00162     if (xhashtable[temp].blocknumber == blocknumber)
00163         return temp;
00164     else
00165         return 0;
00166 }

int hash (  int  blocknumber  ) 
 

???

(to be defined)

Definition at line 197 of file cashedisk.cxx.

References HASHMULT, and HASHSIZE.

Referenced by addtohash(), addtoopen(), blockisinhash(), and removefromopen(). 

00199 {
00200     return abs(blocknumber * HASHMULT) % HASHSIZE;
00201 }

void hashcasheclash (   ) 
 

???

(to be defined)

Definition at line 145 of file cashedisk.cxx.

Referenced by addtohash(). 

00146 {
00147 }

void inithash (   ) 
 

???

(to be defined)

Definition at line 83 of file cashedisk.cxx.

References hashfoo::blocknumber, HASHSIZE, and xhashtable. 

00084 {
00085     int i;
00086     for (i = 0; i < HASHSIZE; i++)
00087         xhashtable[i].blocknumber = -1;
00088 }

void writethruhash (  typeuberrawdiskloaf *  loafptr,
int  blocknumber
) 
 

???

(to be defined)

Definition at line 123 of file cashedisk.cxx.

References addtohash(), blockisinhash(), hashfoo::urdloaf, and xhashtable. 

00126 {
00127     int temp;
00128     void addtohash();
00129 
00130     if (temp = blockisinhash(blocknumber)) {
00131         xhashtable[temp].urdloaf = *loafptr;
00132     } else {
00133         addtohash(loafptr, blocknumber);
00134     }
00135 }

Variable Documentation

hashtable xhashtable[HASHSIZE]
 

Definition at line 73 of file cashedisk.cxx.

Referenced by actuallyreadrawloaffromhash(), addtohash(), blockisinhash(), inithash(), and writethruhash().

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