poll.h

// Copyright (c) 2015 Nuxi, https://nuxi.nl/
//
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// <poll.h> - definitions for the poll() function
//
// Features missing:
// - POLLRDBAND, POLLPRI, POLLWRBAND:
//   Out-of-band data is not supported.

#ifndef _POLL_H_
#define _POLL_H_

#include <_/types.h>

typedef __size_t nfds_t;

struct pollfd {
  int fd;         // The descriptor being polled.
  short events;   // The input event flags.
  short revents;  // The output event flags.
};

// Input/output flags.
#define POLLRDNORM 0x1  // Normal data may be read without blocking.
#define POLLWRNORM 0x2  // Normal data may be written without blocking.

// Output flags.
#define POLLERR 0x1000   // An error has occurred.
#define POLLHUP 0x2000   // Device has been disconnected.
#define POLLNVAL 0x4000  // Invalid fd member.

#define POLLIN POLLRDNORM
#define POLLOUT POLLWRNORM

__BEGIN_DECLS
int poll(struct pollfd *, __size_t, int);
__END_DECLS

#endif