int main( int argc, char *argv[] )
{
// handle input
if(argc!=5) {
printf("use: virtmem <npages> <nframes> <rand|fifo|custom> <sort|scan|focus>\n");
return 1;
}
int npages = atoi(argv[1]);
int nframes = atoi(argv[2]);
char *page_replacement = argv[3];
const char *program = argv[4];
if (!strcmp(page_replacement,"rand")){
page_rep_choice = 0;
}
else if(!strcmp(page_replacement,"fifo")){
page_rep_choice = 1;
}
else if(!strcmp(page_replacement,"custom")){
page_rep_choice = 2;
}
else{
printf("Choose rand, fifo, or custum\n");
return 1;
}
// create new virtual disk with pointer to the disk object
struct disk *disk = disk_open("myvirtualdisk",npages);
if(!disk) {
fprintf(stderr,"couldn't create virtual disk: %s\n",strerror(errno));
return 1;
}
// create page table with pointer to page table
// includes virtual memory and physical memory
struct page_table *pt = page_table_create( npages, nframes, page_fault_handler );
if(!pt) {
fprintf(stderr,"couldn't create page table: %s\n",strerror(errno));
return 1;
}
// return pointer to start of virtual memory
char *virtmem = page_table_get_virtmem(pt);
// return pointer to start of physical memory
char *physmem = page_table_get_physmem(pt);
// calls page_fault_handler
// call one of the algorithms
if(!strcmp(program,"sort")) {
sort_program(virtmem,npages*PAGE_SIZE);
} else if(!strcmp(program,"scan")) {
scan_program(virtmem,npages*PAGE_SIZE);
} else if(!strcmp(program,"focus")) {
focus_program(virtmem,npages*PAGE_SIZE);
} else {
fprintf(stderr,"unknown program: %s\n",argv[3]);
}
page_table_print(pt);
// clean up
page_table_delete(pt);
disk_close(disk);
return 0;
}
int main( int argc, char *argv[] )
{
if(argc!=5)
{
printf("use: virtmem <npages> <nframes> <rand|fifo|custom> <sort|scan|focus>\n");
return 1;
}
npages = atoi(argv[1]);
nframes = atoi(argv[2]);
const char *algorithm = argv[3];
const char *program = argv[4];
loaded_pages = malloc(sizeof(int) * nframes);
int i;
for(i = 0; i < nframes; i++)
{
/* indicate that there is no pages loaded yet */
loaded_pages[i] = -1;
}
disk = disk_open("myvirtualdisk",npages);
if(!disk)
{
fprintf(stderr,"couldn't create virtual disk: %s\n",strerror(errno));
return 1;
}
struct page_table *pt = page_table_create( npages, nframes, page_fault_handler );
if(!pt)
{
fprintf(stderr,"couldn't create page table: %s\n",strerror(errno));
return 1;
}
char *virtmem = page_table_get_virtmem(pt);
physmem = page_table_get_physmem(pt);
if(!strcmp(algorithm, "rand"))
{
pageswap = 0;
}
else if(!strcmp(algorithm, "fifo"))
{
pageswap = 1;
fifo_counter = 0;
}
else if(!strcmp(algorithm, "custom"))
{
pageswap = 2;
fifo_counter = 0;
clock = malloc(sizeof(int) * nframes);
for(i = 0; i < nframes; i++)
{
clock[i] = 0;
}
}
else if(!strcmp(algorithm, "custom2"))
{
pageswap = 3;
clock = malloc(sizeof(int) * nframes);
for(i = 0; i < nframes; i++)
{
clock[i] = 0;
}
}
else
{
fprintf(stderr,"unknown algorithm: %s\n",argv[2]);
}
if(!strcmp(program,"sort"))
{
sort_program(virtmem,npages*PAGE_SIZE);
}
else if(!strcmp(program,"scan"))
{
scan_program(virtmem,npages*PAGE_SIZE);
}
else if(!strcmp(program,"focus"))
{
focus_program(virtmem,npages*PAGE_SIZE);
}
else
{
fprintf(stderr,"unknown program: %s\n",argv[3]);
}
printf("Faults: %d Reads: %d Writes: %d\n", fault_counter, read_count, write_count);
page_table_delete(pt);
disk_close(disk);
return 0;
}