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
|
/*
* FreeRTOS V202104.00
* Copyright (C) Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
#include "proof/queue.h"
#include "proof/queuecontracts.h"
BaseType_t xQueueGenericSendFromISR( QueueHandle_t xQueue,
const void * const pvItemToQueue,
BaseType_t * const pxHigherPriorityTaskWoken,
const BaseType_t xCopyPosition )
/*@requires
[1/2]queuehandle(xQueue, ?N, ?M, ?is_isr) &*& is_isr == true &*&
chars(pvItemToQueue, M, ?x) &*&
integer(pxHigherPriorityTaskWoken, _) &*&
(xCopyPosition == queueSEND_TO_BACK || xCopyPosition == queueSEND_TO_FRONT || (xCopyPosition == queueOVERWRITE && N == 1));@*/
/*@ensures
[1/2]queuehandle(xQueue, N, M, is_isr) &*&
chars(pvItemToQueue, M, x) &*&
integer(pxHigherPriorityTaskWoken, _);@*/
{
BaseType_t xReturn;
UBaseType_t uxSavedInterruptStatus;
#ifdef VERIFAST /*< const pointer declaration */
Queue_t * pxQueue = xQueue;
#else
Queue_t * const pxQueue = xQueue;
configASSERT( pxQueue );
configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );
configASSERT( !( ( xCopyPosition == queueOVERWRITE ) && ( pxQueue->uxLength != 1 ) ) );
#endif
/* RTOS ports that support interrupt nesting have the concept of a maximum
* system call (or maximum API call) interrupt priority. Interrupts that are
* above the maximum system call priority are kept permanently enabled, even
* when the RTOS kernel is in a critical section, but cannot make any calls to
* FreeRTOS API functions. If configASSERT() is defined in FreeRTOSConfig.h
* then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
* failure if a FreeRTOS API function is called from an interrupt that has been
* assigned a priority above the configured maximum system call priority.
* Only FreeRTOS functions that end in FromISR can be called from interrupts
* that have been assigned a priority at or (logically) below the maximum
* system call interrupt priority. FreeRTOS maintains a separate interrupt
* safe API to ensure interrupt entry is as fast and as simple as possible.
* More information (albeit Cortex-M specific) is provided on the following
* link: https://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html */
portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
/* Similar to xQueueGenericSend, except without blocking if there is no room
* in the queue. Also don't directly wake a task that was blocked on a queue
* read, instead return a flag to say whether a context switch is required or
* not (i.e. has a task with a higher priority than us been woken by this
* post). */
uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
/*@assert queue(pxQueue, ?Storage, N, M, ?W, ?R, ?K, ?is_locked, ?abs);@*/
{
if( ( pxQueue->uxMessagesWaiting < pxQueue->uxLength ) || ( xCopyPosition == queueOVERWRITE ) )
{
const int8_t cTxLock = pxQueue->cTxLock;
const UBaseType_t uxPreviousMessagesWaiting = pxQueue->uxMessagesWaiting;
traceQUEUE_SEND_FROM_ISR( pxQueue );
/* Semaphores use xQueueGiveFromISR(), so pxQueue will not be a
* semaphore or mutex. That means prvCopyDataToQueue() cannot result
* in a task disinheriting a priority and prvCopyDataToQueue() can be
* called here even though the disinherit function does not check if
* the scheduler is suspended before accessing the ready lists. */
#ifdef VERIFAST /*< void cast of unused return value */
/*@close queue(pxQueue, Storage, N, M, W, R, K, is_locked, abs);@*/
prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );
#else
( void ) prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );
#endif
/*@open queue(pxQueue, _, N, M, _, _, _, _, _);@*/
/* The event list is not altered if the queue is locked. This will
* be done when the queue is unlocked later. */
if( cTxLock == queueUNLOCKED )
{
/* VeriFast: we do not verify this configuration option */
#if ( configUSE_QUEUE_SETS == 1 )
{
if( pxQueue->pxQueueSetContainer != NULL )
{
if( ( xCopyPosition == queueOVERWRITE ) && ( uxPreviousMessagesWaiting != ( UBaseType_t ) 0 ) )
{
/* Do not notify the queue set as an existing item
* was overwritten in the queue so the number of items
* in the queue has not changed. */
mtCOVERAGE_TEST_MARKER();
}
else if( prvNotifyQueueSetContainer( pxQueue ) != pdFALSE )
{
/* The queue is a member of a queue set, and posting
* to the queue set caused a higher priority task to
* unblock. A context switch is required. */
if( pxHigherPriorityTaskWoken != NULL )
{
*pxHigherPriorityTaskWoken = pdTRUE;
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
else
{
if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )
{
if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )
{
/* The task waiting has a higher priority so
* record that a context switch is required. */
if( pxHigherPriorityTaskWoken != NULL )
{
*pxHigherPriorityTaskWoken = pdTRUE;
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
}
#else /* configUSE_QUEUE_SETS */
{
if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )
{
if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )
{
/* The task waiting has a higher priority so record that a
* context switch is required. */
if( pxHigherPriorityTaskWoken != NULL )
{
*pxHigherPriorityTaskWoken = pdTRUE;
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
else
{
mtCOVERAGE_TEST_MARKER();
}
/* Not used in this path. */
#ifndef VERIFAST /*< void cast of unused var */
( void ) uxPreviousMessagesWaiting;
#endif
}
#endif /* configUSE_QUEUE_SETS */
}
else
{
/* Increment the lock count so the task that unlocks the queue
* knows that data was posted while it was locked. */
configASSERT( cTxLock != queueINT8_MAX );
pxQueue->cTxLock = ( int8_t ) ( cTxLock + 1 );
}
xReturn = pdPASS;
/*@
if (xCopyPosition == queueSEND_TO_BACK)
{
close queue(pxQueue, Storage, N, M, (W+1)%N, R, (K+1), is_locked, append(abs, singleton(x)));
}
else if (xCopyPosition == queueSEND_TO_FRONT)
{
if (R == 0)
{
close queue(pxQueue, Storage, N, M, W, (N-1), (K+1), is_locked, cons(x, abs));
}
else
{
close queue(pxQueue, Storage, N, M, W, (R-1), (K+1), is_locked, cons(x, abs));
}
} else if (xCopyPosition == queueOVERWRITE)
{
close queue(pxQueue, Storage, N, M, W, R, 1, is_locked, singleton(x));
}
@*/
}
else
{
traceQUEUE_SEND_FROM_ISR_FAILED( pxQueue );
xReturn = errQUEUE_FULL;
/*@close queue(pxQueue, Storage, N, M, W, R, K, is_locked, abs);@*/
}
}
portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
return xReturn;
}
|
