96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
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/*
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* File : Mail.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2016, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2016/10/1 Bernard The first version
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*/
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#pragma once
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#include <stdint.h>
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#include <string.h>
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#include <rtthread.h>
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namespace rtthread {
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/**
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* The Mail class allow to control, send, receive, or wait for mail.
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* A mail is a memory block that is send to a thread or interrupt service routine.
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* @param T data type of a single message element.
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* @param 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 Mail {
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public:
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/** Create and Initialise Mail queue. */
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Mail(const char* name = "")
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{
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rt_mb_init(&mID, name, mPool, queue_sz, RT_IPC_FLAG_FIFO);
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}
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~Mail()
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{
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rt_mb_detach(&mID);
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}
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/** Put a mail in the queue.
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@param mptr memory block previously allocated with Mail::alloc or Mail::calloc.
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@return status code that indicates the execution status of the function.
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*/
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bool put(T *mptr, int32_t millisec = 0)
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{
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rt_int32_t tick;
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if (millisec < 0)
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tick = -1;
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else
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tick = rt_tick_from_millisecond(millisec);
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return rt_mb_send_wait(&mID, (rt_uint32_t)mptr, tick) == RT_EOK;
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}
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/** Get a mail 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 that contains mail information or error code.
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*/
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T* get(int32_t millisec = -1)
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{
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T *t = NULL;
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rt_int32_t tick;
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if (millisec < 0)
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tick = -1;
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else
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tick = rt_tick_from_millisecond(millisec);
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rt_mb_recv(&mID, &t, tick);
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return t;
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}
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private:
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struct rt_mailbox mID;
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T* mPool[queue_sz];
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};
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}
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