mirror of https://github.com/ARMmbed/mbed-os.git
110 lines
3.7 KiB
C++
110 lines
3.7 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 MAIL_H
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#define MAIL_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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namespace rtos {
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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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@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 Mail {
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public:
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/** Create and Initialise Mail queue. */
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Mail() {
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#ifdef CMSIS_OS_RTX
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memset(_mail_q, 0, sizeof(_mail_q));
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_mail_p[0] = _mail_q;
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memset(_mail_m, 0, sizeof(_mail_m));
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_mail_p[1] = _mail_m;
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_mail_def.pool = _mail_p;
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_mail_def.queue_sz = queue_sz;
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_mail_def.item_sz = sizeof(T);
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#endif
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_mail_id = osMailCreate(&_mail_def, NULL);
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}
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/** Allocate a memory block of type T
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@param millisec timeout value or 0 in case of no time-out. (default: 0).
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@return pointer to memory block that can be filled with mail or NULL in case error.
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*/
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T* alloc(uint32_t millisec=0) {
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return (T*)osMailAlloc(_mail_id, millisec);
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}
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/** Allocate a memory block of type T and set memory block to zero.
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@param millisec timeout value or 0 in case of no time-out. (default: 0).
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@return pointer to memory block that can be filled with mail or NULL in case error.
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*/
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T* calloc(uint32_t millisec=0) {
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return (T*)osMailCAlloc(_mail_id, millisec);
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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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osStatus put(T *mptr) {
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return osMailPut(_mail_id, (void*)mptr);
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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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osEvent get(uint32_t millisec=osWaitForever) {
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return osMailGet(_mail_id, millisec);
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}
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/** Free a memory block from a mail.
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@param mptr pointer to the memory block that was obtained with Mail::get.
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@return status code that indicates the execution status of the function.
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*/
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osStatus free(T *mptr) {
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return osMailFree(_mail_id, (void*)mptr);
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}
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private:
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osMailQId _mail_id;
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osMailQDef_t _mail_def;
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#ifdef CMSIS_OS_RTX
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uint32_t _mail_q[4+(queue_sz)];
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uint32_t _mail_m[3+((sizeof(T)+3)/4)*(queue_sz)];
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void *_mail_p[2];
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#endif
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};
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}
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#endif
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