LCOV - code coverage report
Current view: directory - usr/include/sys - epoll.h (source / functions) Found Hit Coverage
Test: app.info Lines: 3 3 100.0 %
Date: 2012-06-02 Functions: 3 3 100.0 %

       1                 : /* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
       2                 :    This file is part of the GNU C Library.
       3                 : 
       4                 :    The GNU C Library is free software; you can redistribute it and/or
       5                 :    modify it under the terms of the GNU Lesser General Public
       6                 :    License as published by the Free Software Foundation; either
       7                 :    version 2.1 of the License, or (at your option) any later version.
       8                 : 
       9                 :    The GNU C Library is distributed in the hope that it will be useful,
      10                 :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      11                 :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12                 :    Lesser General Public License for more details.
      13                 : 
      14                 :    You should have received a copy of the GNU Lesser General Public
      15                 :    License along with the GNU C Library; if not, write to the Free
      16                 :    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
      17                 :    02111-1307 USA.  */
      18                 : 
      19                 : #ifndef _SYS_EPOLL_H
      20                 : #define _SYS_EPOLL_H    1
      21                 : 
      22                 : #include <stdint.h>
      23                 : #include <sys/types.h>
      24                 : 
      25                 : 
      26                 : enum EPOLL_EVENTS
      27                 :   {
      28                 :     EPOLLIN = 0x001,
      29                 : #define EPOLLIN EPOLLIN
      30                 :     EPOLLPRI = 0x002,
      31                 : #define EPOLLPRI EPOLLPRI
      32                 :     EPOLLOUT = 0x004,
      33                 : #define EPOLLOUT EPOLLOUT
      34                 :     EPOLLRDNORM = 0x040,
      35                 : #define EPOLLRDNORM EPOLLRDNORM
      36                 :     EPOLLRDBAND = 0x080,
      37                 : #define EPOLLRDBAND EPOLLRDBAND
      38                 :     EPOLLWRNORM = 0x100,
      39                 : #define EPOLLWRNORM EPOLLWRNORM
      40                 :     EPOLLWRBAND = 0x200,
      41                 : #define EPOLLWRBAND EPOLLWRBAND
      42                 :     EPOLLMSG = 0x400,
      43                 : #define EPOLLMSG EPOLLMSG
      44                 :     EPOLLERR = 0x008,
      45                 : #define EPOLLERR EPOLLERR
      46                 :     EPOLLHUP = 0x010,
      47                 : #define EPOLLHUP EPOLLHUP
      48                 :     EPOLLONESHOT = (1 << 30),
      49                 : #define EPOLLONESHOT EPOLLONESHOT
      50                 :     EPOLLET = (1 << 31)
      51                 : #define EPOLLET EPOLLET
      52                 :   };
      53                 : 
      54                 : 
      55                 : /* Valid opcodes ( "op" parameter ) to issue to epoll_ctl().  */
      56                 : #define EPOLL_CTL_ADD 1 /* Add a file decriptor to the interface.  */
      57                 : #define EPOLL_CTL_DEL 2 /* Remove a file decriptor from the interface.  */
      58                 : #define EPOLL_CTL_MOD 3 /* Change file decriptor epoll_event structure.  */
      59                 : 
      60                 : 
      61                 : typedef union epoll_data
      62                 : {
      63                 :   void *ptr;
      64                 :   int fd;
      65                 :   uint32_t u32;
      66                 :   uint64_t u64;
      67                 : } epoll_data_t;
      68                 : 
      69                 : struct epoll_event
      70                 : {
      71                 :   uint32_t events;      /* Epoll events */
      72                 :   epoll_data_t data;    /* User data variable */
      73                 : };
      74                 : 
      75                 : 
      76                 : __BEGIN_DECLS
      77                 : 
      78                 : /* Creates an epoll instance.  Returns an fd for the new instance.
      79                 :    The "size" parameter is a hint specifying the number of file
      80                 :    descriptors to be associated with the new instance.  The fd
      81                 :    returned by epoll_create() should be closed with close().  */
      82            1420 : extern int epoll_create (int __size) __THROW;
      83                 : 
      84                 : 
      85                 : /* Manipulate an epoll instance "epfd". Returns 0 in case of success,
      86                 :    -1 in case of error ( the "errno" variable will contain the
      87                 :    specific error code ) The "op" parameter is one of the EPOLL_CTL_*
      88                 :    constants defined above. The "fd" parameter is the target of the
      89                 :    operation. The "event" parameter describes which events the caller
      90                 :    is interested in and any associated user data.  */
      91            2839 : extern int epoll_ctl (int __epfd, int __op, int __fd,
      92                 :                       struct epoll_event *__event) __THROW;
      93                 : 
      94                 : 
      95                 : /* Wait for events on an epoll instance "epfd". Returns the number of
      96                 :    triggered events returned in "events" buffer. Or -1 in case of
      97                 :    error with the "errno" variable set to the specific error code. The
      98                 :    "events" parameter is a buffer that will contain triggered
      99                 :    events. The "maxevents" is the maximum number of events to be
     100                 :    returned ( usually size of "events" ). The "timeout" parameter
     101                 :    specifies the maximum wait time in milliseconds (-1 == infinite).
     102                 : 
     103                 :    This function is a cancellation point and therefore not marked with
     104                 :    __THROW.  */
     105            1472 : extern int epoll_wait (int __epfd, struct epoll_event *__events,
     106                 :                        int __maxevents, int __timeout);
     107                 : 
     108                 : __END_DECLS
     109                 : 
     110                 : #endif /* sys/epoll.h */

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