mach/headers/port_obj.h

   1 /*
   2  * Copyright (c) 2003 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 /*
  30  * Define a service to map from a kernel-generated port name
  31  * to server-defined "type" and "value" data to be associated
  32  * with the port.
  33  */
  34
  35 #ifndef PORT_OBJ_H
  36 #define PORT_OBJ_H
  37
  38 #include <mach/port.h>
  39
  40 struct port_obj_tentry {
  41         void *pos_value;
  42         int pos_type;
  43 };
  44
  45 #include <sys/cdefs.h>
  46
  47 __BEGIN_DECLS
  48 extern void port_obj_init(int);
  49 extern struct port_obj_tentry *port_obj_table;
  50 extern int port_obj_table_size;
  51 __END_DECLS
  52
  53 #ifndef PORT_OBJ_ASSERT
  54
  55 #define port_set_obj_value_type(pname, value, type)     \
  56 do {                                                    \
  57         int ndx;                                        \
  58                                                         \
  59         if (!port_obj_table)                            \
  60                 port_obj_init(port_obj_table_size);     \
  61         ndx = MACH_PORT_INDEX(pname);                   \
  62         port_obj_table[ndx].pos_value = (value);        \
  63         port_obj_table[ndx].pos_type = (type);          \
  64 } while (0)
  65
  66 #define port_get_obj_value(pname)                       \
  67         (port_obj_table[MACH_PORT_INDEX(pname)].pos_value)
  68
  69 #define port_get_obj_type(pname)                        \
  70         (port_obj_table[MACH_PORT_INDEX(pname)].pos_type)
  71
  72 #else   /* PORT_OBJ_ASSERT */
  73
  74 #define port_set_obj_value_type(pname, value, type)     \
  75 do {                                                    \
  76         int ndx;                                        \
  77                                                         \
  78         if (!port_obj_table)                            \
  79                 port_obj_init(port_obj_table_size);     \
  80         ndx = MACH_PORT_INDEX(pname);                   \
  81         assert(ndx > 0);                                \
  82         assert(ndx < port_obj_table_size);              \
  83         port_obj_table[ndx].pos_value = (value);        \
  84         port_obj_table[ndx].pos_type = (type);          \
  85 } while (0)
  86
  87 #define port_get_obj_value(pname)                               \
  88         ((MACH_PORT_INDEX(pname) < (unsigned)port_obj_table_size) ?     \
  89         port_obj_table[MACH_PORT_INDEX(pname)].pos_value :      \
  90         (panic("port_get_obj_value: index too big"), (void *)-1))
  91
  92 #define port_get_obj_type(pname)                                \
  93         ((MACH_PORT_INDEX(pname) < (unsigned)port_obj_table_size) ?     \
  94         port_obj_table[MACH_PORT_INDEX(pname)].pos_type :       \
  95         (panic("port_get_obj_type: index too big"), -1))
  96
  97 #endif  /* PORT_OBJ_ASSERT */
  98
  99 #endif  /* PORT_OBJ_H */