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Annotation of XNU/osfmk/ipc/port.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  */
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !            28:  * All Rights Reserved.
        !            29:  * 
        !            30:  * Permission to use, copy, modify and distribute this software and its
        !            31:  * documentation is hereby granted, provided that both the copyright
        !            32:  * notice and this permission notice appear in all copies of the
        !            33:  * software, derivative works or modified versions, and any portions
        !            34:  * thereof, and that both notices appear in supporting documentation.
        !            35:  * 
        !            36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            39:  * 
        !            40:  * Carnegie Mellon requests users of this software to return to
        !            41:  * 
        !            42:  *  Software Distribution Coordinator  or  [email protected]
        !            43:  *  School of Computer Science
        !            44:  *  Carnegie Mellon University
        !            45:  *  Pittsburgh PA 15213-3890
        !            46:  * 
        !            47:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            48:  * the rights to redistribute these changes.
        !            49:  */
        !            50: /*
        !            51:  */
        !            52: /*
        !            53:  *     File:   ipc/ipc_port.h
        !            54:  *     Author: Rich Draves
        !            55:  *     Date:   1989
        !            56:  *
        !            57:  *     Implementation specific complement to mach/port.h.
        !            58:  */
        !            59: 
        !            60: #ifndef        _IPC_PORT_H_
        !            61: #define _IPC_PORT_H_
        !            62: 
        !            63: #include <mach/port.h>
        !            64: 
        !            65: #define        MACH_PORT_NGEN(name)            MACH_PORT_MAKE(0, MACH_PORT_GEN(name))
        !            66: 
        !            67: /*
        !            68:  *     Typedefs for code cleanliness.  These must all have
        !            69:  *     the same (unsigned) type as mach_port_name_t.
        !            70:  */
        !            71: 
        !            72: typedef mach_port_name_t mach_port_index_t;            /* index values */
        !            73: typedef mach_port_name_t mach_port_gen_t;              /* generation numbers */
        !            74: 
        !            75: 
        !            76: #define        MACH_PORT_UREFS_MAX     ((mach_port_urefs_t) ((1 << 16) - 1))
        !            77: 
        !            78: #define        MACH_PORT_UREFS_OVERFLOW(urefs, delta)                          \
        !            79:                (((delta) > 0) &&                                       \
        !            80:                 ((((urefs) + (delta)) <= (urefs)) ||                   \
        !            81:                  (((urefs) + (delta)) > MACH_PORT_UREFS_MAX)))
        !            82: 
        !            83: #define        MACH_PORT_UREFS_UNDERFLOW(urefs, delta)                         \
        !            84:                (((delta) < 0) && (-(delta) > (urefs)))
        !            85: 
        !            86: #endif /* _IPC_PORT_H_ */

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