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Annotation of ntddk/src/network/streams/inc/sys/poll.h, revision 1.1

1.1     ! root        1: /*++
        !             2: 
        !             3: Copyright (c) 1991 Microsoft Corporation
        !             4: 
        !             5: Module Name:
        !             6: 
        !             7:   poll.h
        !             8: 
        !             9: Abstract:
        !            10: 
        !            11:   Contains #defines, types, and macros for poll
        !            12: 
        !            13: Author:
        !            14: 
        !            15:   Sam Patton (sampa)   July 26, 1991
        !            16: 
        !            17: Revision History:
        !            18: 
        !            19: --*/
        !            20: 
        !            21: #ifndef SYS_POLL_INCLUDED
        !            22: #define SYS_POLL_INCLUDED
        !            23: 
        !            24: /*
        !            25:  * Structure of file descriptor/event pairs supplied in
        !            26:  * the poll arrays.
        !            27:  */
        !            28: struct pollfd {
        !            29: #ifndef _POSIX_SOURCE
        !            30:         HANDLE fd;                      /* file handle to poll */
        !            31: #else
        !            32:         int   fd;                       /* file desc to poll */
        !            33: #endif
        !            34:         short events;                   /* events of interest on fd */
        !            35:         short revents;                  /* events that occurred on fd */
        !            36: };
        !            37: 
        !            38: /*
        !            39:  * Testable select events
        !            40:  */
        !            41: #define POLLIN          01              /* fd is readable */
        !            42: #define POLLPRI         02              /* priority info at fd */
        !            43: #define POLLOUT         04              /* fd is writeable (won't block) */
        !            44: #define POLLMSG         0100            /* M_SIG or M_PCSIG arrived */
        !            45: 
        !            46: /*
        !            47:  * Non-testable poll events (may not be specified in events field,
        !            48:  * but may be returned in revents field).
        !            49:  */
        !            50: #define POLLERR         010             /* fd has error condition */
        !            51: #define POLLHUP         020             /* fd has been hung up on */
        !            52: #define POLLNVAL        040             /* invalid pollfd entry */
        !            53: 
        !            54: /*
        !            55:  * Number of pollfd entries to read in at a time in poll.
        !            56:  * The larger the value the better the performance, up to the
        !            57:  * maximum number of open files allowed.  Large numbers will
        !            58:  * use excessive amounts of kernel stack space.
        !            59:  */
        !            60: #define NPOLLFILE       20
        !            61: 
        !            62: 
        !            63: /*
        !            64:  * Poll function prototype
        !            65:  *
        !            66:  */
        !            67: 
        !            68: int
        !            69: poll(
        !            70:     IN OUT struct pollfd *,
        !            71:     IN unsigned int,
        !            72:     IN int);
        !            73: 
        !            74: 
        !            75: #endif  //SYS_POLL_INCLUDED

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