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instructions.c
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instructions.c
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//------------------------------------------------------------------------------
//
// chronOS - A scheduling simulator
//
// Copyright (C) 2020 Igor Cordeiro Bordalo Nunes (www.igornunes.com)
// Copyright (C) 2020 Jorge Miguel Louro Pissarra
// Copyright (C) 2020 Diogo Castanheira Simões
// Copyright (C) 2020 Universidade da Beira Interior (www.ubi.pt)
//
// RUNTIME LIBRARIES PACKAGE
// instructions.c, related to processor.h
//
// DESCRIPTION:
// -----------
// Process management: instructions.
//------------------------------------------------------------------------------
#include "processor.h"
#include "pcbmgr.h"
#include "debug.h"
void changeValue(process *p, int n) {
p->context = n;
}
void addValue(process *p, int n) {
p->context += n;
}
void subtractValue(process *p, int n) {
p->context -= n;
}
void blockProcess(process *p) {
p->state = switchState(p->state, STATUS_BLOCKED);
}
void terminateProcess(process *p) {
p->state = switchState(p->state, STATUS_TERMINATED);
if (p->state == STATUS_TERMINATED)
p->timeend = w.cputime;
}
void forkProcess(MEMORY *mem, process *p) {
instruction *inst = &(mem->cells[p->counter + 1]);
size_t size = p->instsize - (p->counter + 1 - p->start);
int address = memalloc(mem, inst, size);
int pid = PID_NULL;
if (address != MEMERR_ALLOC_NOAVAIL)
pid = processalloc(pcb, p->pid, inst->name, address, size, p->priority);
debug("FORKED %ld instructions from PID %d to address %d with new PID %d.\n", size, p->pid, address, pid);
write("FORKED %ld instructions from PID %d to address %d with new PID %d.\n", size, p->pid, address, pid);
}
void cleanProgram(MEMORY *mem, process *p, char *filename) {
char fname[MAX_NAME];
strcpy(fname, filename);
memfree(mem, p->start, p->instsize);
size_t n;
instruction *inst = program_read_from_file(fname, &n);
int address = memalloc(mem, inst, n);
p->start = address;
p->counter = address;
p->instsize = n;
strcpy(p->name, fname);
free(inst);
debug("CLEANED, then allocated %ld instructions at address %d.\n", n, address);
write("CLEANED, then allocated %ld instructions at address %d.\n", n, address);
}