headers/posix/poll.h

   1 /*
   2  * Copyright 2002-2012 Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _POLL_H
   6 #define _POLL_H
   7
   8
   9 typedef unsigned long nfds_t;
  10
  11 struct pollfd {
  12         int             fd;
  13         short   events;         /* events to look for */
  14         short   revents;        /* events that occured */
  15 };
  16
  17 /* events & revents - compatible with the B_SELECT_xxx definitions in Drivers.h */
  18 #define POLLIN          0x0001          /* any readable data available */
  19 #define POLLOUT         0x0002          /* file descriptor is writeable */
  20 #define POLLRDNORM      POLLIN
  21 #define POLLWRNORM      POLLOUT
  22 #define POLLRDBAND      0x0008          /* priority readable data */
  23 #define POLLWRBAND      0x0010          /* priority data can be written */
  24 #define POLLPRI         0x0020          /* high priority readable data */
  25
  26 /* revents only */
  27 #define POLLERR         0x0004          /* errors pending */
  28 #define POLLHUP         0x0080          /* disconnected */
  29 #define POLLNVAL        0x1000          /* invalid file descriptor */
  30
  31
  32 extern
  33 #ifdef __cplusplus
  34 "C"
  35 #endif
  36 int poll(struct pollfd *fds, nfds_t numfds, int timeout);
  37
  38 #endif /* _POLL_H */