mirror of https://github.com/ARMmbed/mbed-os.git
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/* events
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* Copyright (c) 2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "events/mbed_shared_queues.h"
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#ifdef MBED_CONF_RTOS_PRESENT
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#include "rtos/Thread.h"
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using rtos::Thread;
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#endif
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using namespace events;
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namespace mbed {
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#ifdef MBED_CONF_RTOS_PRESENT
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/* Create an event queue, and start the thread that dispatches it. Static
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* variables mean this happens once the first time each template instantiation
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* is called. This is currently instantiated no more than twice.
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*/
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template
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<osPriority Priority, size_t QueueSize, size_t StackSize>
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EventQueue *do_shared_event_queue_with_thread(const char *name)
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{
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static uint64_t queue_buffer[QueueSize / sizeof(uint64_t)];
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static EventQueue queue(sizeof queue_buffer, (unsigned char *) queue_buffer);
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static uint64_t stack[StackSize / sizeof(uint64_t)];
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static Thread thread(Priority, StackSize, (unsigned char *) stack, name);
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Thread::State state = thread.get_state();
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if (state == Thread::Inactive || state == Thread::Deleted) {
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osStatus status = thread.start(callback(&queue, &EventQueue::dispatch_forever));
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MBED_ASSERT(status == osOK);
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if (status != osOK) {
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return NULL;
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}
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}
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return &queue;
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}
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#endif
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EventQueue *mbed_event_queue()
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{
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#if MBED_CONF_EVENTS_SHARED_DISPATCH_FROM_APPLICATION || !defined MBED_CONF_RTOS_PRESENT
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/* Only create the EventQueue, but no dispatching thread */
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static unsigned char queue_buffer[MBED_CONF_EVENTS_SHARED_EVENTSIZE];
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static EventQueue queue(sizeof queue_buffer, queue_buffer);
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return &queue;
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#else
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return do_shared_event_queue_with_thread<osPriorityNormal, MBED_CONF_EVENTS_SHARED_EVENTSIZE, MBED_CONF_EVENTS_SHARED_STACKSIZE>("shared_event_queue");
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#endif
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}
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#ifdef MBED_CONF_RTOS_PRESENT
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EventQueue *mbed_highprio_event_queue()
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{
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return do_shared_event_queue_with_thread<osPriorityHigh, MBED_CONF_EVENTS_SHARED_HIGHPRIO_EVENTSIZE, MBED_CONF_EVENTS_SHARED_HIGHPRIO_STACKSIZE>("shared_highprio_event_queue");
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}
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#endif
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}
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