Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/events/mbed_shared_queues.cpp@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

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marcozecchini 0:9fca2b23d0ba 1 /* events
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2017 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
marcozecchini 0:9fca2b23d0ba 5 * you may not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 6 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 9 *
marcozecchini 0:9fca2b23d0ba 10 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
marcozecchini 0:9fca2b23d0ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 13 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 14 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 15 */
marcozecchini 0:9fca2b23d0ba 16
marcozecchini 0:9fca2b23d0ba 17 #include "events/mbed_shared_queues.h"
marcozecchini 0:9fca2b23d0ba 18 #include "mbed.h"
marcozecchini 0:9fca2b23d0ba 19
marcozecchini 0:9fca2b23d0ba 20 using namespace events;
marcozecchini 0:9fca2b23d0ba 21
marcozecchini 0:9fca2b23d0ba 22 namespace mbed {
marcozecchini 0:9fca2b23d0ba 23
marcozecchini 0:9fca2b23d0ba 24 #ifdef MBED_CONF_RTOS_PRESENT
marcozecchini 0:9fca2b23d0ba 25 /* Create an event queue, and start the thread that dispatches it. Static
marcozecchini 0:9fca2b23d0ba 26 * variables mean this happens once the first time each template instantiation
marcozecchini 0:9fca2b23d0ba 27 * is called. This is currently instantiated no more than twice.
marcozecchini 0:9fca2b23d0ba 28 */
marcozecchini 0:9fca2b23d0ba 29 template
marcozecchini 0:9fca2b23d0ba 30 <osPriority Priority, size_t QueueSize, size_t StackSize>
marcozecchini 0:9fca2b23d0ba 31 EventQueue *do_shared_event_queue_with_thread()
marcozecchini 0:9fca2b23d0ba 32 {
marcozecchini 0:9fca2b23d0ba 33 static uint64_t queue_buffer[QueueSize / sizeof(uint64_t)];
marcozecchini 0:9fca2b23d0ba 34 static EventQueue queue(sizeof queue_buffer, (unsigned char *) queue_buffer);
marcozecchini 0:9fca2b23d0ba 35
marcozecchini 0:9fca2b23d0ba 36 static uint64_t stack[StackSize / sizeof(uint64_t)];
marcozecchini 0:9fca2b23d0ba 37 static Thread thread(Priority, StackSize, (unsigned char *) stack);
marcozecchini 0:9fca2b23d0ba 38
marcozecchini 0:9fca2b23d0ba 39 Thread::State state = thread.get_state();
marcozecchini 0:9fca2b23d0ba 40 if (state == Thread::Inactive || state == Thread::Deleted) {
marcozecchini 0:9fca2b23d0ba 41 osStatus status = thread.start(callback(&queue, &EventQueue::dispatch_forever));
marcozecchini 0:9fca2b23d0ba 42 MBED_ASSERT(status == osOK);
marcozecchini 0:9fca2b23d0ba 43 if (status != osOK) {
marcozecchini 0:9fca2b23d0ba 44 return NULL;
marcozecchini 0:9fca2b23d0ba 45 }
marcozecchini 0:9fca2b23d0ba 46 }
marcozecchini 0:9fca2b23d0ba 47
marcozecchini 0:9fca2b23d0ba 48 return &queue;
marcozecchini 0:9fca2b23d0ba 49 }
marcozecchini 0:9fca2b23d0ba 50 #endif
marcozecchini 0:9fca2b23d0ba 51
marcozecchini 0:9fca2b23d0ba 52 EventQueue *mbed_event_queue()
marcozecchini 0:9fca2b23d0ba 53 {
marcozecchini 0:9fca2b23d0ba 54 #if MBED_CONF_EVENTS_SHARED_DISPATCH_FROM_APPLICATION || !defined MBED_CONF_RTOS_PRESENT
marcozecchini 0:9fca2b23d0ba 55 /* Only create the EventQueue, but no dispatching thread */
marcozecchini 0:9fca2b23d0ba 56 static unsigned char queue_buffer[MBED_CONF_EVENTS_SHARED_EVENTSIZE];
marcozecchini 0:9fca2b23d0ba 57 static EventQueue queue(sizeof queue_buffer, queue_buffer);
marcozecchini 0:9fca2b23d0ba 58
marcozecchini 0:9fca2b23d0ba 59 return &queue;
marcozecchini 0:9fca2b23d0ba 60 #else
marcozecchini 0:9fca2b23d0ba 61 return do_shared_event_queue_with_thread<osPriorityNormal, MBED_CONF_EVENTS_SHARED_EVENTSIZE, MBED_CONF_EVENTS_SHARED_STACKSIZE>();
marcozecchini 0:9fca2b23d0ba 62 #endif
marcozecchini 0:9fca2b23d0ba 63 }
marcozecchini 0:9fca2b23d0ba 64
marcozecchini 0:9fca2b23d0ba 65 #ifdef MBED_CONF_RTOS_PRESENT
marcozecchini 0:9fca2b23d0ba 66 EventQueue *mbed_highprio_event_queue()
marcozecchini 0:9fca2b23d0ba 67 {
marcozecchini 0:9fca2b23d0ba 68 return do_shared_event_queue_with_thread<osPriorityHigh, MBED_CONF_EVENTS_SHARED_HIGHPRIO_EVENTSIZE, MBED_CONF_EVENTS_SHARED_HIGHPRIO_STACKSIZE>();
marcozecchini 0:9fca2b23d0ba 69 }
marcozecchini 0:9fca2b23d0ba 70 #endif
marcozecchini 0:9fca2b23d0ba 71
marcozecchini 0:9fca2b23d0ba 72 }