bitburner-src/src/Netscript/Pid.ts

import { workerScripts } from "./WorkerScripts";

let pidCounter = 1;

/**
 * Find and return the next availble PID for a script
 */
export function generateNextPid(): number {
  let tempCounter = pidCounter;

  // Cap the number of search iterations at some arbitrary value to avoid
  // infinite loops. We'll assume that players wont have 1mil+ running scripts
  let found = false;
  for (let i = 0; i < 1e6; ) {
    if (!workerScripts.has(tempCounter + i)) {
      found = true;
      tempCounter = tempCounter + i;
      break;
    }

    if (i === Number.MAX_SAFE_INTEGER - 1) {
      i = 1;
    } else {
      ++i;
    }
  }

  if (found) {
    pidCounter = tempCounter + 1;
    if (pidCounter >= Number.MAX_SAFE_INTEGER) {
      pidCounter = 1;
    }

    return tempCounter;
  } else {
    return -1;
  }
}

export function resetPidCounter(): void {
  pidCounter = 1;
}