Method cancelNext

src/executor.cpp:334–340

* @brief Executor::cancelNext cancels execution of first process in queue * if it's not already running * * @return id of the cancelled process or -1 on error */

 * @return  id of the cancelled process or -1 on error
 */
auto Executor::cancelNext() -> int {
  if (running || m_execQueue.isEmpty()) {
    return -1; // Return -1 to indicate no process was cancelled
               // (queue empty or currently executing).
  }
  return m_execQueue.dequeue().id;
}

/**
 * @brief Executor::finished called when an executed process finishes