RunLoop.subproj/CFRunLoopPriv.h

   1 /*
   2  * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24 */
  25
  26 #include <CoreFoundation/CFBase.h>
  27 #include <sys/types.h>
  28 #include <sys/event.h>
  29
  30 typedef struct {
  31     CFIndex     version;
  32     void *      info;
  33     const void *(*retain)(const void *info);
  34     void        (*release)(const void *info);
  35     CFStringRef (*copyDescription)(const void *info);
  36     Boolean     (*equal)(const void *info1, const void *info2);
  37     CFHashCode  (*hash)(const void *info);
  38     void        (*perform)(const struct kevent *kev, void *info);
  39     struct kevent event;
  40 } CFRunLoopSourceContext2;
  41
  42 // The bits in the flags field in the kevent structure are cleared except for EV_ONESHOT and EV_CLEAR.
  43 // Do not use the udata field of the kevent structure -- that field is smashed by CFRunLoop.
  44 // There is no way to EV_ENABLE or EV_DISABLE a kevent.
  45 // The "autoinvalidation" of EV_ONESHOT is not handled properly by CFRunLoop yet.
  46 // The "autoinvalidation" of EV_DELETE on the last close of a file descriptor is not handled properly by CFRunLoop yet.
  47 // There is no way to reset the state in a kevent (such as clearing the EV_EOF state for fifos).
  48