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
|
/*
* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "tmacros.h"
const char rtems_test_name[] = "SPSEM 3";
typedef struct {
rtems_id low;
rtems_id mid;
rtems_id high;
rtems_id inversion;
rtems_id sem_a;
rtems_id sem_b;
} test_context;
static test_context test_instance;
static void assert_prio(rtems_id task_id, rtems_task_priority expected_prio)
{
rtems_status_code sc;
rtems_task_priority prio;
sc = rtems_task_set_priority(task_id, RTEMS_CURRENT_PRIORITY, &prio);
rtems_test_assert(sc == RTEMS_SUCCESSFUL);
rtems_test_assert(prio == expected_prio);
}
static void create_task(rtems_id *id, rtems_task_priority prio)
{
rtems_status_code sc;
sc = rtems_task_create(
rtems_build_name('T', 'A', 'S', 'K'),
prio,
RTEMS_MINIMUM_STACK_SIZE,
RTEMS_DEFAULT_MODES,
RTEMS_DEFAULT_ATTRIBUTES,
id
);
rtems_test_assert(sc == RTEMS_SUCCESSFUL);
}
static void start_task(rtems_id id, rtems_task_entry entry)
{
rtems_status_code sc;
sc = rtems_task_start(id, entry, 0);
rtems_test_assert(sc == RTEMS_SUCCESSFUL);
}
static void create_sema(rtems_id *id)
{
rtems_status_code sc;
sc = rtems_semaphore_create(
rtems_build_name('S', 'E', 'M', 'A'),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
0,
id
);
rtems_test_assert(sc == RTEMS_SUCCESSFUL);
}
static void obtain_sema(rtems_id id)
{
rtems_status_code sc;
sc = rtems_semaphore_obtain(id, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
rtems_test_assert(sc == RTEMS_SUCCESSFUL);
}
static void inversion_task(rtems_task_argument arg)
{
test_context *ctx = &test_instance;
/*
* Here we see that the priority of the high priority task blocked on
* semaphore B doesn't propagate to the low priority task owning semaphore A
* on which the owner of semaphore B depends.
*/
assert_prio(ctx->low, 3);
assert_prio(ctx->mid, 1);
assert_prio(ctx->high, 1);
assert_prio(ctx->inversion, 2);
TEST_END();
rtems_test_exit(0);
}
static void mid_task(rtems_task_argument arg)
{
test_context *ctx = &test_instance;
obtain_sema(ctx->sem_b);
obtain_sema(ctx->sem_a);
}
static void high_task(rtems_task_argument arg)
{
test_context *ctx = &test_instance;
start_task(ctx->inversion, inversion_task);
obtain_sema(ctx->sem_b);
}
static void Init(rtems_task_argument arg)
{
test_context *ctx = &test_instance;
TEST_BEGIN();
ctx->low = rtems_task_self();
create_task(&ctx->mid, 3);
create_task(&ctx->high, 1);
create_task(&ctx->inversion, 2);
create_sema(&ctx->sem_a);
create_sema(&ctx->sem_b);
obtain_sema(ctx->sem_a);
start_task(ctx->mid, mid_task);
start_task(ctx->high, high_task);
}
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_MAXIMUM_TASKS 4
#define CONFIGURE_MAXIMUM_SEMAPHORES 2
#define CONFIGURE_INIT_TASK_PRIORITY 4
#define CONFIGURE_INIT_TASK_INITIAL_MODES RTEMS_DEFAULT_MODES
#define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#define CONFIGURE_INIT
#include <rtems/confdefs.h>
|
