spz-lab3/src/process.c

#include <stdlib.h>
#include <stdio.h>

#include "process.h"
#include "mmu.h"
#include "random.h"

struct Process *
Process(size_t proc_id, size_t max_accesses, size_t total_pages_owned)
{
	struct Process *p = malloc(sizeof(struct Process));
	p->id = proc_id;
	p->max_accesses = max_accesses;
	p->pages_accessed = 0;
	p->total_pages_owned = total_pages_owned;
	p->pt = malloc(sizeof(struct PageTableEntry) * total_pages_owned);

	for (size_t i = 0; i < p->total_pages_owned; i++)
		p->pt[i].p = 0;

	return p;
}

size_t PROCESS_run_for(struct Process *p, size_t time_bits)
{
	for (size_t i = 0;
		(i < time_bits) && (p->pages_accessed < p->max_accesses);
		i++, p->pages_accessed++)
	{
		// no working set yet
		int accessed_page_no = randint(p->total_pages_owned);

		if (randint(10) > 7) {
			printf("[process %d] Writing to page #%d\n", p->id, accessed_page_no);
			MMU_write(p->pt, accessed_page_no);
		} else {
			printf("[process %d] Reading from page #%d\n", p->id, accessed_page_no);
			MMU_read(p->pt, accessed_page_no);
		}
	}

	return p->pages_accessed >= p->max_accesses;
}