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Annotation of ntddk/src/network/streams/inc/sys/poll.h, revision 1.1.1.1

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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