Assignment1/sysproc.c at master · Awish021/Assignment1 · GitHub

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#include "types.h"
#include "x86.h"
#include "defs.h"
#include "date.h"
#include "param.h"
#include "memlayout.h"
#include "mmu.h"
#include "proc.h"

int
sys_fork(void)
{
  return fork();
}

int
sys_exit(void)
{
  int status;
  if(argint(0,&status)<0)
    return -1;
  exit(status);
  return 0;  // not reached
}

int
sys_wait(void)
{
  int* status;
  if(argint(0,(int*)&status)<0)
    return -1;
  return wait(status);
}

int
sys_kill(void)
{
  int pid;

  if(argint(0, &pid) < 0)
    return -1;
  return kill(pid);
}

int
sys_getpid(void)
{
  return proc->pid;
}

int
sys_sbrk(void)
{
  int addr;
  int n;

  if(argint(0, &n) < 0)
    return -1;
  addr = proc->sz;
  if(growproc(n) < 0)
    return -1;
  return addr;
}

int
sys_sleep(void)
{
  int n;
  uint ticks0;

  if(argint(0, &n) < 0)
    return -1;
  acquire(&tickslock);
  ticks0 = ticks;
  while(ticks - ticks0 < n){
    if(proc->killed){
      release(&tickslock);
      return -1;
    }
    sleep(&ticks, &tickslock);
  }
  release(&tickslock);
  return 0;
}

// return how many clock tick interrupts have occurred
// since start.
int
sys_uptime(void)
{
  uint xticks;

  acquire(&tickslock);
  xticks = ticks;
  release(&tickslock);
  return xticks;
}

int sys_priority(void){
  int num;
  if(argint(0,&num)<0)
    return -1;
  priority(num);
  return 0;
}

int sys_schedp(void){
  int sched_policy_id;
  if(argint(0,&sched_policy_id)<0)
    return -1;
  return schedp(sched_policy_id);
}
int sys_wait_stat(void){
  int* status;
  struct perf* p;
  if(argint(0,(int*)&status)<0)
    return -1;
  if(argint(1,(int*)&p)<0)
    return -1;
  return wait_stat(status,p);

}
int sys_signal(void){
  int signum;
  int handler;
  if(argint(0,&signum)<0||argint(1,&handler)<0)
    return -1;
  return (int)signal(signum,(sighandler_t)handler);
}
int sys_sigsend(void){
    int pid;
    int signum;
    if(argint(0,&pid)<0||argint(1,&signum)<0)
       return -1;
    return sigsend(pid,signum);
  }
int sys_sigreturn(void){
  return sigreturn();
}