libsyscall/mach/headers/port_obj.h

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31
  32 /*
  33  * Define a service to map from a kernel-generated port name
  34  * to server-defined "type" and "value" data to be associated
  35  * with the port.
  36  */
  37
  38 #ifndef PORT_OBJ_H
  39 #define PORT_OBJ_H
  40
  41 #include <mach/port.h>
  42
  43 struct port_obj_tentry {
  44         void *pos_value;
  45         int pos_type;
  46 };
  47
  48 #include <sys/cdefs.h>
  49
  50 __BEGIN_DECLS
  51 extern void port_obj_init(int);
  52 __END_DECLS
  53
  54 extern struct port_obj_tentry *port_obj_table;
  55 extern int port_obj_table_size;
  56
  57 #ifndef PORT_OBJ_ASSERT
  58
  59 #define port_set_obj_value_type(pname, value, type)     \
  60 do {                                                    \
  61         int ndx;                                        \
  62                                                         \
  63         if (!port_obj_table)                            \
  64                 port_obj_init(port_obj_table_size);     \
  65         ndx = MACH_PORT_INDEX(pname);                   \
  66         port_obj_table[ndx].pos_value = (value);        \
  67         port_obj_table[ndx].pos_type = (type);          \
  68 } while (0)
  69
  70 #define port_get_obj_value(pname)                       \
  71         (port_obj_table[MACH_PORT_INDEX(pname)].pos_value)
  72
  73 #define port_get_obj_type(pname)                        \
  74         (port_obj_table[MACH_PORT_INDEX(pname)].pos_type)
  75
  76 #else   /* PORT_OBJ_ASSERT */
  77
  78 #define port_set_obj_value_type(pname, value, type)     \
  79 do {                                                    \
  80         int ndx;                                        \
  81                                                         \
  82         if (!port_obj_table)                            \
  83                 port_obj_init(port_obj_table_size);     \
  84         ndx = MACH_PORT_INDEX(pname);                   \
  85         assert(ndx > 0);                                \
  86         assert(ndx < port_obj_table_size);              \
  87         port_obj_table[ndx].pos_value = (value);        \
  88         port_obj_table[ndx].pos_type = (type);          \
  89 } while (0)
  90
  91 #define port_get_obj_value(pname)                               \
  92         ((MACH_PORT_INDEX(pname) < (unsigned)port_obj_table_size) ?     \
  93         port_obj_table[MACH_PORT_INDEX(pname)].pos_value :      \
  94         (panic("port_get_obj_value: index too big"), (void *)-1))
  95
  96 #define port_get_obj_type(pname)                                \
  97         ((MACH_PORT_INDEX(pname) < (unsigned)port_obj_table_size) ?     \
  98         port_obj_table[MACH_PORT_INDEX(pname)].pos_type :       \
  99         (panic("port_get_obj_type: index too big"), -1))
 100
 101 #endif  /* PORT_OBJ_ASSERT */
 102
 103 #endif  /* PORT_OBJ_H */