summaryrefslogtreecommitdiffstats
path: root/c/src/exec/rtems/src/semmp.c
blob: c0a43f3f53a460a7ead4ca4bcc3105fee0d008b6 (plain) (blame)
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
/*
 *  Multiprocessing Support for the Semaphore Manager
 *
 *
 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
 *  On-Line Applications Research Corporation (OAR).
 *  All rights assigned to U.S. Government, 1994.
 *
 *  This material may be reproduced by or for the U.S. Government pursuant
 *  to the copyright license under the clause at DFARS 252.227-7013.  This
 *  notice must appear in all copies of this file and its derivatives.
 *
 *  $Id$
 */

#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/core/mpci.h>
#include <rtems/core/mppkt.h>
#include <rtems/core/object.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/sem.h>
#include <rtems/core/thread.h>
#include <rtems/core/watchdog.h>
#include <rtems/rtems/support.h>

/*PAGE
 *
 *  _Semaphore_MP_Send_process_packet
 *
 */

void _Semaphore_MP_Send_process_packet (
  Semaphore_MP_Remote_operations  operation,
  Objects_Id                      semaphore_id,
  rtems_name                      name,
  Objects_Id                      proxy_id
)
{
  Semaphore_MP_Packet *the_packet;
  unsigned32           node;

  switch ( operation ) {

    case SEMAPHORE_MP_ANNOUNCE_CREATE:
    case SEMAPHORE_MP_ANNOUNCE_DELETE:
    case SEMAPHORE_MP_EXTRACT_PROXY:

      the_packet                    = _Semaphore_MP_Get_packet();
      the_packet->Prefix.the_class  = MP_PACKET_SEMAPHORE;
      the_packet->Prefix.length     = sizeof ( Semaphore_MP_Packet );
      the_packet->Prefix.to_convert = sizeof ( Semaphore_MP_Packet );
      the_packet->operation         = operation;
      the_packet->Prefix.id         = semaphore_id;
      the_packet->name              = name;
      the_packet->proxy_id          = proxy_id;

      if ( operation == SEMAPHORE_MP_EXTRACT_PROXY )
         node = rtems_get_node( semaphore_id );
      else
         node = MPCI_ALL_NODES;

      _MPCI_Send_process_packet( node, &the_packet->Prefix );
      break;

    case SEMAPHORE_MP_OBTAIN_REQUEST:
    case SEMAPHORE_MP_OBTAIN_RESPONSE:
    case SEMAPHORE_MP_RELEASE_REQUEST:
    case SEMAPHORE_MP_RELEASE_RESPONSE:
      break;
  }
}

/*PAGE
 *
 *  _Semaphore_MP_Send_request_packet
 *
 */

rtems_status_code _Semaphore_MP_Send_request_packet (
  Semaphore_MP_Remote_operations operation,
  Objects_Id                     semaphore_id,
  rtems_option                   option_set,
  rtems_interval                 timeout
)
{
  Semaphore_MP_Packet *the_packet;

  switch ( operation ) {

    case SEMAPHORE_MP_OBTAIN_REQUEST:
    case SEMAPHORE_MP_RELEASE_REQUEST:

      the_packet                    = _Semaphore_MP_Get_packet();
      the_packet->Prefix.the_class  = MP_PACKET_SEMAPHORE;
      the_packet->Prefix.length     = sizeof ( Semaphore_MP_Packet );
      the_packet->Prefix.to_convert = sizeof ( Semaphore_MP_Packet );
      if ( ! _Options_Is_no_wait(option_set))
          the_packet->Prefix.timeout = timeout;

      the_packet->operation         = operation;
      the_packet->Prefix.id         = semaphore_id;
      the_packet->option_set        = option_set;

      return _MPCI_Send_request_packet(
          rtems_get_node( semaphore_id ),
          &the_packet->Prefix,
          STATES_WAITING_FOR_SEMAPHORE
        );
      break;

    case SEMAPHORE_MP_ANNOUNCE_CREATE:
    case SEMAPHORE_MP_ANNOUNCE_DELETE:
    case SEMAPHORE_MP_EXTRACT_PROXY:
    case SEMAPHORE_MP_OBTAIN_RESPONSE:
    case SEMAPHORE_MP_RELEASE_RESPONSE:
      break;

  }
  /*
   *  The following line is included to satisfy compilers which
   *  produce warnings when a function does not end with a return.
   */
  return RTEMS_SUCCESSFUL;
}

/*PAGE
 *
 *  _Semaphore_MP_Send_response_packet
 *
 */

void _Semaphore_MP_Send_response_packet (
  Semaphore_MP_Remote_operations  operation,
  Objects_Id                      semaphore_id,
  Thread_Control                 *the_thread
)
{
  Semaphore_MP_Packet *the_packet;

  switch ( operation ) {

    case SEMAPHORE_MP_OBTAIN_RESPONSE:
    case SEMAPHORE_MP_RELEASE_RESPONSE:

      the_packet = ( Semaphore_MP_Packet *) the_thread->receive_packet;

/*
 *  The packet being returned already contains the class, length, and
 *  to_convert fields, therefore they are not set in this routine.
 */
      the_packet->operation = operation;
      the_packet->Prefix.id = the_packet->Prefix.source_tid;

      _MPCI_Send_response_packet(
        rtems_get_node( the_packet->Prefix.source_tid ),
        &the_packet->Prefix
      );
      break;

    case SEMAPHORE_MP_ANNOUNCE_CREATE:
    case SEMAPHORE_MP_ANNOUNCE_DELETE:
    case SEMAPHORE_MP_EXTRACT_PROXY:
    case SEMAPHORE_MP_OBTAIN_REQUEST:
    case SEMAPHORE_MP_RELEASE_REQUEST:
      break;

  }
}

/*PAGE
 *
 *
 *  _Semaphore_MP_Process_packet
 *
 */

void _Semaphore_MP_Process_packet (
  rtems_packet_prefix  *the_packet_prefix
)
{
  Semaphore_MP_Packet *the_packet;
  Thread_Control      *the_thread;
  boolean              ignored;

  the_packet = (Semaphore_MP_Packet *) the_packet_prefix;

  switch ( the_packet->operation ) {

    case SEMAPHORE_MP_ANNOUNCE_CREATE:

      ignored = _Objects_MP_Allocate_and_open(
                  &_Semaphore_Information,
                  the_packet->name,
                  the_packet->Prefix.id,
                  TRUE
                );

      _MPCI_Return_packet( the_packet_prefix );
      break;

    case SEMAPHORE_MP_ANNOUNCE_DELETE:

      _Objects_MP_Close( &_Semaphore_Information, the_packet->Prefix.id );

      _MPCI_Return_packet( the_packet_prefix );
      break;

    case SEMAPHORE_MP_EXTRACT_PROXY:

      the_thread = _Thread_MP_Find_proxy( the_packet->proxy_id );

      if ( ! _Thread_Is_null( the_thread ) )
        _Thread_queue_Extract( the_thread->Wait.queue, the_thread );

      _MPCI_Return_packet( the_packet_prefix );
      break;

    case SEMAPHORE_MP_OBTAIN_REQUEST:

      the_packet->Prefix.return_code = rtems_semaphore_obtain(
        the_packet->Prefix.id,
        the_packet->option_set,
        the_packet->Prefix.timeout
      );

      if ( ! _Thread_Is_proxy_blocking( the_packet->Prefix.return_code ) )
        _Semaphore_MP_Send_response_packet(
           SEMAPHORE_MP_OBTAIN_RESPONSE,
           the_packet->Prefix.id,
           _Thread_Executing
        );
      break;

    case SEMAPHORE_MP_OBTAIN_RESPONSE:
    case SEMAPHORE_MP_RELEASE_RESPONSE:

      the_thread = _MPCI_Process_response( the_packet_prefix );

      _MPCI_Return_packet( the_packet_prefix );
      break;

    case SEMAPHORE_MP_RELEASE_REQUEST:

      the_packet->Prefix.return_code = rtems_semaphore_release(
        the_packet->Prefix.id
      );

      _Semaphore_MP_Send_response_packet(
        SEMAPHORE_MP_RELEASE_RESPONSE,
        the_packet->Prefix.id,
        _Thread_Executing
      );
      break;
  }
}

/*PAGE
 *
 *  _Semaphore_MP_Send_object_was_deleted
 *
 */

void _Semaphore_MP_Send_object_was_deleted (
  Thread_Control *the_proxy
)
{
  the_proxy->receive_packet->return_code = RTEMS_OBJECT_WAS_DELETED;

  _Semaphore_MP_Send_response_packet(
    SEMAPHORE_MP_OBTAIN_RESPONSE,
    the_proxy->Wait.id,
    the_proxy
  );

}

/*PAGE
 *
 *  _Semaphore_MP_Send_extract_proxy
 *
 */

void _Semaphore_MP_Send_extract_proxy (
  Thread_Control *the_thread
)
{
  _Semaphore_MP_Send_process_packet(
    SEMAPHORE_MP_EXTRACT_PROXY,
    the_thread->Wait.id,
    (rtems_name) 0,
    the_thread->Object.id
  );

}

/*PAGE
 *
 *  _Semaphore_MP_Get_packet
 *
 */

Semaphore_MP_Packet *_Semaphore_MP_Get_packet ( void )
{
  return ( (Semaphore_MP_Packet *) _MPCI_Get_packet() );
}

/* end of file */