1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
---|
2 | |
---|
3 | /** |
---|
4 | * @file |
---|
5 | * |
---|
6 | * @ingroup RTEMSScoreSchedulerCBS |
---|
7 | * |
---|
8 | * @brief This source file contains the implementation of |
---|
9 | * _Scheduler_CBS_Attach_thread(). |
---|
10 | */ |
---|
11 | |
---|
12 | /* |
---|
13 | * Copyright (C) 2011 Petr Benes. |
---|
14 | * Copyright (C) 2011 On-Line Applications Research Corporation (OAR). |
---|
15 | * |
---|
16 | * Redistribution and use in source and binary forms, with or without |
---|
17 | * modification, are permitted provided that the following conditions |
---|
18 | * are met: |
---|
19 | * 1. Redistributions of source code must retain the above copyright |
---|
20 | * notice, this list of conditions and the following disclaimer. |
---|
21 | * 2. Redistributions in binary form must reproduce the above copyright |
---|
22 | * notice, this list of conditions and the following disclaimer in the |
---|
23 | * documentation and/or other materials provided with the distribution. |
---|
24 | * |
---|
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
---|
26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
---|
29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
---|
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
---|
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
---|
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
---|
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
---|
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
---|
35 | * POSSIBILITY OF SUCH DAMAGE. |
---|
36 | */ |
---|
37 | |
---|
38 | #ifdef HAVE_CONFIG_H |
---|
39 | #include "config.h" |
---|
40 | #endif |
---|
41 | |
---|
42 | #include <rtems/score/schedulercbsimpl.h> |
---|
43 | #include <rtems/score/threadimpl.h> |
---|
44 | |
---|
45 | int _Scheduler_CBS_Attach_thread ( |
---|
46 | Scheduler_CBS_Server_id server_id, |
---|
47 | rtems_id task_id |
---|
48 | ) |
---|
49 | { |
---|
50 | Scheduler_CBS_Server *server; |
---|
51 | ISR_lock_Context lock_context; |
---|
52 | Thread_Control *the_thread; |
---|
53 | Scheduler_CBS_Node *node; |
---|
54 | |
---|
55 | if ( server_id >= _Scheduler_CBS_Maximum_servers ) { |
---|
56 | return SCHEDULER_CBS_ERROR_INVALID_PARAMETER; |
---|
57 | } |
---|
58 | |
---|
59 | server = &_Scheduler_CBS_Server_list[ server_id ]; |
---|
60 | |
---|
61 | if ( !server->initialized ) { |
---|
62 | return SCHEDULER_CBS_ERROR_NOSERVER; |
---|
63 | } |
---|
64 | |
---|
65 | if ( server->task_id != -1 ) { |
---|
66 | return SCHEDULER_CBS_ERROR_FULL; |
---|
67 | } |
---|
68 | |
---|
69 | the_thread = _Thread_Get( task_id, &lock_context ); |
---|
70 | |
---|
71 | if ( the_thread == NULL ) { |
---|
72 | return SCHEDULER_CBS_ERROR_INVALID_PARAMETER; |
---|
73 | } |
---|
74 | |
---|
75 | node = _Scheduler_CBS_Thread_get_node( the_thread ); |
---|
76 | |
---|
77 | if ( node->cbs_server != NULL ) { |
---|
78 | _ISR_lock_ISR_enable( &lock_context ); |
---|
79 | return SCHEDULER_CBS_ERROR_FULL; |
---|
80 | } |
---|
81 | |
---|
82 | node->cbs_server = server; |
---|
83 | |
---|
84 | server->task_id = task_id; |
---|
85 | |
---|
86 | the_thread->is_preemptible = true; |
---|
87 | the_thread->CPU_budget.operations = &_Scheduler_CBS_Budget; |
---|
88 | |
---|
89 | _ISR_lock_ISR_enable( &lock_context ); |
---|
90 | return SCHEDULER_CBS_OK; |
---|
91 | } |
---|