The C and C++ Include Header Files

/usr/include/asm-generic/poll.h


$ cat -n /usr/include/asm-generic/poll.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef __ASM_GENERIC_POLL_H
     3	#define __ASM_GENERIC_POLL_H
     4	
     5	/* These are specified by iBCS2 */
     6	#define POLLIN		0x0001
     7	#define POLLPRI		0x0002
     8	#define POLLOUT		0x0004
     9	#define POLLERR		0x0008
    10	#define POLLHUP		0x0010
    11	#define POLLNVAL	0x0020
    12	
    13	/* The rest seem to be more-or-less nonstandard. Check them! */
    14	#define POLLRDNORM	0x0040
    15	#define POLLRDBAND	0x0080
    16	#ifndef POLLWRNORM
    17	#define POLLWRNORM	0x0100
    18	#endif
    19	#ifndef POLLWRBAND
    20	#define POLLWRBAND	0x0200
    21	#endif
    22	#ifndef POLLMSG
    23	#define POLLMSG		0x0400
    24	#endif
    25	#ifndef POLLREMOVE
    26	#define POLLREMOVE	0x1000
    27	#endif
    28	#ifndef POLLRDHUP
    29	#define POLLRDHUP       0x2000
    30	#endif
    31	
    32	#define POLLFREE	(__poll_t)0x4000
    33	
    34	#define POLL_BUSY_LOOP	(__poll_t)0x8000
    35	
    36	struct pollfd {
    37		int fd;
    38		short events;
    39		short revents;
    40	};
    41	
    42	#endif	/* __ASM_GENERIC_POLL_H */