#include "ndelay.h"

#include <fcntl.h>
#include <sys/types.h>

/**
  @file ndelay.c
  @author djb
  @ref qmail
  @brief delaying of IO operations
*/

#ifndef O_NONBLOCK
  #define O_NONBLOCK O_NDELAY
#endif

int ndelay_on(int fd)
{
  return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK);
}

int ndelay_off(int fd)
{
  return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) & ~O_NONBLOCK);
}