#include <stdint.h>
#include "syscall.h"
#include "proc/proc.h"
#include "spinlock/spinlock.h"
#include "errors.h"
#include "util/util.h"
#include "sysdefs/processctl.h"

int32_t SYSCALL3(sys_processctl, pid1, cmd1, optsptr1) {
  uint64_t pid = pid1;
  uint64_t cmd = cmd1;
  int32_t ret = E_OK;
  
  if (pid == -1) {
    pid = PROCS.current->pid;
  }

  spinlock_acquire(&PROCS.spinlock);
  Proc *proc = NULL;
  LL_FINDPROP(PROCS.procs, proc, pid, pid);
  spinlock_release(&PROCS.spinlock);

  if (proc == NULL) {
    ret = E_INVALIDARGUMENT;
    goto done;
  }

  switch (cmd) {
    case PCTL_KILL: {
      proc_kill(proc);
      ret = E_DOSCHEDULING;
    } break;
    default: {
      ret = E_INVALIDARGUMENT;
    } break;
  }

done:
  return ret;
}