82 lines
2.9 KiB
C++
82 lines
2.9 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2012 ARM Limited
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef QUEUE_H
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#define QUEUE_H
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#include <stdint.h>
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#include <string.h>
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#include "cmsis_os.h"
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#include "mbed_error.h"
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namespace rtos {
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/** The Queue class allow to control, send, receive, or wait for messages.
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A message can be a integer or pointer value to a certain type T that is send
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to a thread or interrupt service routine.
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@tparam T data type of a single message element.
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@tparam queue_sz maximum number of messages in queue.
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*/
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template<typename T, uint32_t queue_sz>
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class Queue {
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public:
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/** Create and initialise a message Queue. */
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Queue() {
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#ifdef CMSIS_OS_RTX
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memset(_queue_q, 0, sizeof(_queue_q));
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_queue_def.pool = _queue_q;
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_queue_def.queue_sz = queue_sz;
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#endif
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_queue_id = osMessageCreate(&_queue_def, NULL);
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if (_queue_id == NULL) {
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error("Error initialising the queue object\n");
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}
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}
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/** Put a message in a Queue.
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@param data message pointer.
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@param millisec timeout value or 0 in case of no time-out. (default: 0)
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@return status code that indicates the execution status of the function.
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*/
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osStatus put(T* data, uint32_t millisec=0) {
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return osMessagePut(_queue_id, (uint32_t)data, millisec);
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}
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/** Get a message or Wait for a message from a Queue.
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@param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
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@return event information that includes the message and the status code.
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*/
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osEvent get(uint32_t millisec=osWaitForever) {
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return osMessageGet(_queue_id, millisec);
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}
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private:
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osMessageQId _queue_id;
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osMessageQDef_t _queue_def;
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#ifdef CMSIS_OS_RTX
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uint32_t _queue_q[4+(queue_sz)];
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#endif
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};
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}
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#endif
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