mach/headers/port_obj.h

   1 /*
   2  * Copyright (c) 2003 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  * @OSF_COPYRIGHT@
  25  */
  26
  27 /*
  28  * Define a service to map from a kernel-generated port name
  29  * to server-defined "type" and "value" data to be associated
  30  * with the port.
  31  */
  32
  33 #ifndef PORT_OBJ_H
  34 #define PORT_OBJ_H
  35
  36 #include <mach/port.h>
  37
  38 struct port_obj_tentry {
  39         void *pos_value;
  40         int pos_type;
  41 };
  42
  43 #include <sys/cdefs.h>
  44
  45 __BEGIN_DECLS
  46 extern void port_obj_init(int);
  47 __END_DECLS
  48
  49 extern struct port_obj_tentry *port_obj_table;
  50 extern int port_obj_table_size;
  51
  52 #ifndef PORT_OBJ_ASSERT
  53
  54 #define port_set_obj_value_type(pname, value, type)     \
  55 do {                                                    \
  56         int ndx;                                        \
  57                                                         \
  58         if (!port_obj_table)                            \
  59                 port_obj_init(port_obj_table_size);     \
  60         ndx = MACH_PORT_INDEX(pname);                   \
  61         port_obj_table[ndx].pos_value = (value);        \
  62         port_obj_table[ndx].pos_type = (type);          \
  63 } while (0)
  64
  65 #define port_get_obj_value(pname)                       \
  66         (port_obj_table[MACH_PORT_INDEX(pname)].pos_value)
  67
  68 #define port_get_obj_type(pname)                        \
  69         (port_obj_table[MACH_PORT_INDEX(pname)].pos_type)
  70
  71 #else   /* PORT_OBJ_ASSERT */
  72
  73 #define port_set_obj_value_type(pname, value, type)     \
  74 do {                                                    \
  75         int ndx;                                        \
  76                                                         \
  77         if (!port_obj_table)                            \
  78                 port_obj_init(port_obj_table_size);     \
  79         ndx = MACH_PORT_INDEX(pname);                   \
  80         assert(ndx > 0);                                \
  81         assert(ndx < port_obj_table_size);              \
  82         port_obj_table[ndx].pos_value = (value);        \
  83         port_obj_table[ndx].pos_type = (type);          \
  84 } while (0)
  85
  86 #define port_get_obj_value(pname)                               \
  87         ((MACH_PORT_INDEX(pname) < (unsigned)port_obj_table_size) ?     \
  88         port_obj_table[MACH_PORT_INDEX(pname)].pos_value :      \
  89         (panic("port_get_obj_value: index too big"), (void *)-1))
  90
  91 #define port_get_obj_type(pname)                                \
  92         ((MACH_PORT_INDEX(pname) < (unsigned)port_obj_table_size) ?     \
  93         port_obj_table[MACH_PORT_INDEX(pname)].pos_type :       \
  94         (panic("port_get_obj_type: index too big"), -1))
  95
  96 #endif  /* PORT_OBJ_ASSERT */
  97
  98 #endif  /* PORT_OBJ_H */