osfmk/ipc/ipc_types.h

   1 /*
   2  * Copyright (c) 2002,2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  * Define Basic IPC types available to callers.
  30  * These are not intended to be used directly, but
  31  * are used to define other types available through
  32  * port.h and mach_types.h for in-kernel entities.
  33  */
  34 #ifndef _IPC_TYPES_H_
  35 #define _IPC_TYPES_H_
  36
  37 #include <mach/port.h>
  38 #include <mach/message.h>
  39 #include <mach/mach_types.h>
  40
  41 #if !defined(MACH_KERNEL_PRIVATE)
  42
  43 /*
  44  * For kernel code that resides outside of mach
  45  * we define empty structs so that everything will
  46  * remain strongly typed, without giving out
  47  * implementation details.
  48  */
  49 struct ipc_object ;
  50
  51 #endif /* !MACH_KERNEL_PRIVATE */
  52
  53 typedef struct ipc_object       *ipc_object_t;
  54
  55 #define IPC_OBJECT_NULL         ((ipc_object_t) 0)
  56 #define IPC_OBJECT_DEAD         ((ipc_object_t)~0)
  57 #define IPC_OBJECT_VALID(io)    (((io) != IPC_OBJECT_NULL) && \
  58                                  ((io) != IPC_OBJECT_DEAD))
  59
  60 typedef void (*mach_msg_continue_t)(mach_msg_return_t); /* after wakeup */
  61
  62 #endif  /* _IPC_TYPES_H_ */