text: #ifndef __BIO_H
  #define __BIO_H
  
  /* Exported API */
  void bioInit(void);
  void bioCreateBackgroundJob(int type, void *arg1, void *arg2, void *arg3);
  unsigned long long bioPendingJobsOfType(int type);
  unsigned long long bioWaitStepOfType(int type);
  time_t bioOlderJobOfType(int type);
  void bioKillThreads(void);
  
  /* Background job opcodes */
  #define BIO_CLOSE_FILE    0 /* Deferred close(2) syscall. */
  #define BIO_AOF_FSYNC     1 /* Deferred AOF fsync. */
  #define BIO_LAZY_FREE     2 /* Deferred objects freeing. */
  #define BIO_NUM_OPS       3
  
  #endif
  