tpPage *nextPageToBeReplaced() {
if(strcmp(substAlg, "lru") == 0) {
return lruAlgorithm();
} else if(strcmp(substAlg, "nru") == 0) {
return nruAlgorithm();
} else if(strcmp(substAlg, "seg") == 0) {
return secAlgorithm();
}
printf("Choose one of those page replace algorithm: LRU, NRE, SEG");
exit(1);
}
int main(int argc, char *argv[])
{
if(argc == REQUIRED_ARGS)
{
int *referenceString=NULL;
referenceString = malloc(ARRAY_INIT*sizeof(int));
if(referenceString == NULL){
fprintf(stderr,"Memory not allocated\n");
exit(0);
}
FILE *file = fopen("./refstring.txt","r");
if(!file){
fprintf(stderr,"File could not be opened\n");
exit(0);
}
int currentNumber = 0;
int refLength = 0;
int frames = atoi(argv[1]);
//Populate reference string array with file data
while((fscanf(file, "%d ", ¤tNumber)) != EOF)
{
referenceString[refLength] = currentNumber;
refLength++;
}
//Run LRU Algorithm to calculate page faults
int pageFaults = lruAlgorithm(referenceString, refLength, frames);
printf("LRU Page Faults: %d\n", pageFaults);
//Garbage collection
free(referenceString);
}
else
{
fprintf(stderr,"Simulation required 2 arguments.\n");
exit(0);
}
}
