RSE / slice-1.2.8 / lib / io / poll.h 

            

              
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/*
 * poll.h
 *
 * Copyright (c) 1997 Graham Barr <gbarr@pobox.com>. All rights reserved.
 * This program is free software; you can redistribute it and/or
 * modify it under the same terms as Perl itself.
 *
 */
#ifndef POLL_H
#  define POLL_H
#if defined(I_POLL) || defined(POLLWRBAND)
#  include <poll.h>
#  ifndef HAS_POLL
#    define HAS_POLL
#  endif
#else
#ifdef HAS_SELECT
/* We shall emulate poll using select */
#define EMULATE_POLL_WITH_SELECT
typedef struct pollfd {
    int fd;
    short events;
    short revents;
} pollfd_t;
#define POLLIN          0x0001
#define POLLPRI         0x0002
#define POLLOUT         0x0004
#define POLLRDNORM      0x0040
#define POLLWRNORM      POLLOUT
#define POLLRDBAND      0x0080
#define POLLWRBAND      0x0100
#define POLLNORM        POLLRDNORM
/* Return ONLY events (NON testable) */
#define POLLERR         0x0008
#define POLLHUP         0x0010
#define POLLNVAL        0x0020
int poll _((struct pollfd *, unsigned long, int));
#ifndef HAS_POLL
#  define HAS_POLL
#endif
#endif /* HAS_SELECT */
#endif /* I_POLL */
#endif /* POLL_H */