summaryrefslogtreecommitdiffstats
path: root/cpukit/score/include/rtems/score/object.h
blob: a0bf3707b6d407031248a85b4e1e6b063a828346 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
/*  object.h
 *
 *  This include file contains all the constants and structures associated
 *  with the Object Handler.  This Handler provides mechanisms which
 *  can be used to initialize and manipulate all objects which have 
 *  ids.
 *
 *  COPYRIGHT (c) 1989-1998.
 *  On-Line Applications Research Corporation (OAR).
 *  Copyright assigned to U.S. Government, 1994.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id$
 */

#ifndef __OBJECTS_h
#define __OBJECTS_h

#ifdef __cplusplus
extern "C" {
#endif

#include <rtems/score/chain.h>

/*
 *  The following type defines the control block used to manage
 *  object names.
 */

typedef void * Objects_Name;

/*
 *  Space for object names is allocated in multiples of this.
 *
 *  NOTE:  Must be a power of 2.  Matches the name manipulation routines.
 */

#define OBJECTS_NAME_ALIGNMENT     sizeof( unsigned32 )

/*
 *  Functions which compare names are prototyped like this.
 */

typedef boolean (*Objects_Name_comparators)(
  void       * /* name_1 */,
  void       * /* name_2 */,
  unsigned32   /* length */
);

/*
 *  The following type defines the control block used to manage
 *  object IDs.  The format is as follows (0=LSB):
 *
 *     Bits  0 .. 15    = index
 *     Bits 16 .. 25    = node
 *     Bits 26 .. 31    = class
 */

typedef unsigned32 Objects_Id;

#define OBJECTS_INDEX_START_BIT  0
#define OBJECTS_NODE_START_BIT  16
#define OBJECTS_CLASS_START_BIT 26

#define OBJECTS_INDEX_MASK      0x0000ffff
#define OBJECTS_NODE_MASK       0x03ff0000
#define OBJECTS_CLASS_MASK      0xfc000000

#define OBJECTS_INDEX_VALID_BITS  0x0000ffff
#define OBJECTS_NODE_VALID_BITS   0x000003ff
#define OBJECTS_CLASS_VALID_BITS  0x000000cf

/*
 *  This enumerated type is used in the class field of the object ID.
 */

typedef enum {
  OBJECTS_NO_CLASS                  =  0,
  OBJECTS_INTERNAL_THREADS          =  1,
  OBJECTS_RTEMS_TASKS               =  2,
  OBJECTS_POSIX_THREADS             =  3,
  OBJECTS_RTEMS_TIMERS              =  4,
  OBJECTS_RTEMS_SEMAPHORES          =  5,
  OBJECTS_RTEMS_MESSAGE_QUEUES      =  6,
  OBJECTS_RTEMS_PARTITIONS          =  7,
  OBJECTS_RTEMS_REGIONS             =  8,
  OBJECTS_RTEMS_PORTS               =  9,
  OBJECTS_RTEMS_PERIODS             = 10,
  OBJECTS_RTEMS_EXTENSIONS          = 11,
  OBJECTS_POSIX_KEYS                = 12,
  OBJECTS_POSIX_INTERRUPTS          = 13,
  OBJECTS_POSIX_MESSAGE_QUEUES      = 14,
  OBJECTS_POSIX_MUTEXES             = 15,
  OBJECTS_POSIX_SEMAPHORES          = 16,
  OBJECTS_POSIX_CONDITION_VARIABLES = 17
} Objects_Classes;
 
#define OBJECTS_CLASSES_FIRST               OBJECTS_NO_CLASS
#define OBJECTS_CLASSES_LAST                OBJECTS_POSIX_CONDITION_VARIABLES
#define OBJECTS_CLASSES_FIRST_THREAD_CLASS  OBJECTS_INTERNAL_THREADS
#define OBJECTS_CLASSES_LAST_THREAD_CLASS   OBJECTS_POSIX_THREADS

/*
 *  This enumerated type lists the locations which may be returned
 *  by _Objects_Get.  These codes indicate the success of locating
 *  an object with the specified ID.
 */

typedef enum {
  OBJECTS_LOCAL  = 0,         /* object is local */
  OBJECTS_REMOTE = 1,         /* object is remote */
  OBJECTS_ERROR  = 2          /* id was invalid */
}  Objects_Locations;

/*
 *  The following defines the Object Control Block used to manage
 *  each object local to this node.
 */

typedef struct {
  Chain_Node    Node;
  Objects_Id    id;
  Objects_Name  name;
}   Objects_Control;

/*
 *  The following defines the structure for the information used to
 *  manage each class of objects.
 */

typedef struct {
  Objects_Classes   the_class;       /* Class of this object */
  Objects_Id        minimum_id;      /* minimum valid id of this type */
  Objects_Id        maximum_id;      /* maximum valid id of this type */
  unsigned32        maximum;         /* maximum number of objects */
  Objects_Control **local_table;     /* table of local object pointers */
  Objects_Name     *name_table;      /* table of local object names */
  Chain_Control    *global_table;    /* pointer to global table */
  Chain_Control     Inactive;        /* chain of inactive ctl blocks */
  boolean           is_string;       /* TRUE if names are strings */
  unsigned32        name_length;     /* maximum length of names */
  boolean           is_thread;       /* TRUE if these are threads */
                                     /*   irregardless of API */
}   Objects_Information;

/*
 *  The following defines the data storage which contains the
 *  node number of the local node.
 */

SCORE_EXTERN unsigned32  _Objects_Local_node;
SCORE_EXTERN unsigned32  _Objects_Maximum_nodes;

/*
 *  The following is the list of information blocks for each object
 *  class.  From the ID, we can go to one of these information blocks,
 *  and obtain a pointer to the appropriate object control block.
 */

SCORE_EXTERN Objects_Information 
    *_Objects_Information_table[OBJECTS_CLASSES_LAST + 1];

/*
 *  The following defines the constant which may be used
 *  with _Objects_Get to manipulate the calling task.
 *
 */

#define OBJECTS_ID_OF_SELF ((Objects_Id) 0)

/*
 *  The following define the constants which may be used in name searches.
 */

#define OBJECTS_SEARCH_ALL_NODES   0
#define OBJECTS_SEARCH_OTHER_NODES 0x7FFFFFFE
#define OBJECTS_SEARCH_LOCAL_NODE  0x7FFFFFFF
#define OBJECTS_WHO_AM_I           0

/*
 * Parameters and return id's for _Objects_Get_next
 */

#define OBJECTS_ID_INITIAL_INDEX   (0)
#define OBJECTS_ID_FINAL_INDEX     (0xffff)

#define OBJECTS_ID_INITIAL(_class, _node) \
  _Objects_Build_id( (_class), (_node), OBJECTS_ID_INITIAL_INDEX )

#define OBJECTS_ID_FINAL           ((Objects_Id)~0)

/*
 *  _Objects_Handler_initialization
 *
 *  DESCRIPTION:
 *
 *  This function performs the initialization necessary for this handler.
 *
 */

void _Objects_Handler_initialization(
  unsigned32 node,
  unsigned32 maximum_nodes,
  unsigned32 maximum_global_objects
);

/*
 *  _Objects_Initialize_information
 *
 *  DESCRIPTION:
 *
 *  This function initializes an object class information record.
 *  SUPPORTS_GLOBAL is TRUE if the object class supports global
 *  objects, and FALSE otherwise.  Maximum indicates the number
 *  of objects required in this class and size indicates the size
 *  in bytes of each control block for this object class.  The
 *  name length and string designator are also set.  In addition,
 *  the class may be a task, therefore this information is also included.
 */

void _Objects_Initialize_information (
  Objects_Information *information,
  Objects_Classes      the_class,
  boolean              supports_global,
  unsigned32           maximum,
  unsigned32           size,
  boolean              is_string,
  unsigned32           maximum_name_length,
  boolean              is_task
);

/*
 *  _Objects_Clear_name
 *
 *  DESCRIPTION:
 *
 *  XXX
 */
 
void _Objects_Clear_name(
  void       *name,
  unsigned32  length
);

/*
 *  _Objects_Copy_name_string
 *
 *  DESCRIPTION:
 *
 *  XXX
 */

void _Objects_Copy_name_string(
  void       *source,
  void       *destination
);

/*
 *  _Objects_Copy_name_raw
 *
 *  DESCRIPTION:
 *
 *  XXX
 */

void _Objects_Copy_name_raw(
  void       *source,
  void       *destination,
  unsigned32  length
);

/*
 *  _Objects_Compare_name_string
 *
 *  DESCRIPTION:
 *
 *  XXX
 */

boolean _Objects_Compare_name_string(
  void       *name_1,
  void       *name_2,
  unsigned32  length
);

/*
 *  _Objects_Compare_name_raw
 *
 *  DESCRIPTION:
 *
 *  XXX
 */

boolean _Objects_Compare_name_raw(
  void       *name_1,
  void       *name_2,
  unsigned32  length
);
/*
 *  _Objects_Name_to_id
 *
 *  DESCRIPTION:
 *
 *  This function implements the common portion of the object
 *  identification directives.  This directive returns the object
 *  id associated with name.  If more than one object of this class
 *  is named name, then the object to which the id belongs is
 *  arbitrary.  Node indicates the extent of the search for the
 *  id of the object named name.  If the object class supports global
 *  objects, then the search can be limited to a particular node
 *  or allowed to encompass all nodes.
 *
 */

typedef enum {
  OBJECTS_SUCCESSFUL,
  OBJECTS_INVALID_NAME,
  OBJECTS_INVALID_NODE
} Objects_Name_to_id_errors;

#define OBJECTS_NAME_ERRORS_FIRST OBJECTS_SUCCESSFUL
#define OBJECTS_NAME_ERRORS_LAST  OBJECTS_INVALID_NODE

Objects_Name_to_id_errors _Objects_Name_to_id(
  Objects_Information *information,
  Objects_Name         name,
  unsigned32           node,
  Objects_Id          *id
);

/*
 *  _Objects_Get
 *
 *  DESCRIPTION:
 *
 *  This function maps object ids to object control blocks.
 *  If id corresponds to a local object, then it returns
 *  the_object control pointer which maps to id and location
 *  is set to OBJECTS_LOCAL.  If the object class supports global
 *  objects and the object id is global and resides on a remote
 *  node, then location is set to OBJECTS_REMOTE, and the_object
 *  is undefined.  Otherwise, location is set to OBJECTS_ERROR
 *  and the_object is undefined.
 *
 */

Objects_Control *_Objects_Get (
  Objects_Information *information,
  Objects_Id           id,
  Objects_Locations   *location
);

/*
 *  _Objects_Get_next
 *
 *  DESCRIPTION:
 *
 *  Like _Objects_Get, but is used to find "next" open object.
 *
 */

Objects_Control *_Objects_Get_next(
    Objects_Information *information,
    Objects_Id           id,
    Objects_Locations   *location_p,
    Objects_Id          *next_id_p
);

/*
 *  _Objects_Get_information
 *
 *  DESCRIPTION:
 *
 *  Returns the information control block for the class of objects
 *  corresponding to this id.
 */

Objects_Information *_Objects_Get_information(
  Objects_Id  id
);
  
/*
 *  Pieces of object.inl are promoted out to the user
 */

#include <rtems/score/object.inl>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/score/objectmp.h>
#endif

#ifdef __cplusplus
}
#endif

#endif
/* end of include file */