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mbed client lightswitch demo
Dependencies: mbed Socket lwip-eth lwip-sys lwip
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Diff: mbed-rtos/rtos/Mail.h
- Revision:
- 11:cada08fc8a70
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos/rtos/Mail.h Thu Jun 09 17:08:36 2016 +0000 @@ -0,0 +1,109 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2012 ARM Limited + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#ifndef MAIL_H +#define MAIL_H + +#include <stdint.h> +#include <string.h> + +#include "cmsis_os.h" + +namespace rtos { + +/** The Mail class allow to control, send, receive, or wait for mail. + A mail is a memory block that is send to a thread or interrupt service routine. + @tparam T data type of a single message element. + @tparam queue_sz maximum number of messages in queue. +*/ +template<typename T, uint32_t queue_sz> +class Mail { +public: + /** Create and Initialise Mail queue. */ + Mail() { + #ifdef CMSIS_OS_RTX + memset(_mail_q, 0, sizeof(_mail_q)); + _mail_p[0] = _mail_q; + + memset(_mail_m, 0, sizeof(_mail_m)); + _mail_p[1] = _mail_m; + + _mail_def.pool = _mail_p; + _mail_def.queue_sz = queue_sz; + _mail_def.item_sz = sizeof(T); + #endif + _mail_id = osMailCreate(&_mail_def, NULL); + } + + /** Allocate a memory block of type T + @param millisec timeout value or 0 in case of no time-out. (default: 0). + @return pointer to memory block that can be filled with mail or NULL in case error. + */ + T* alloc(uint32_t millisec=0) { + return (T*)osMailAlloc(_mail_id, millisec); + } + + /** Allocate a memory block of type T and set memory block to zero. + @param millisec timeout value or 0 in case of no time-out. (default: 0). + @return pointer to memory block that can be filled with mail or NULL in case error. + */ + T* calloc(uint32_t millisec=0) { + return (T*)osMailCAlloc(_mail_id, millisec); + } + + /** Put a mail in the queue. + @param mptr memory block previously allocated with Mail::alloc or Mail::calloc. + @return status code that indicates the execution status of the function. + */ + osStatus put(T *mptr) { + return osMailPut(_mail_id, (void*)mptr); + } + + /** Get a mail from a queue. + @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever). + @return event that contains mail information or error code. + */ + osEvent get(uint32_t millisec=osWaitForever) { + return osMailGet(_mail_id, millisec); + } + + /** Free a memory block from a mail. + @param mptr pointer to the memory block that was obtained with Mail::get. + @return status code that indicates the execution status of the function. + */ + osStatus free(T *mptr) { + return osMailFree(_mail_id, (void*)mptr); + } + +private: + osMailQId _mail_id; + osMailQDef_t _mail_def; +#ifdef CMSIS_OS_RTX + uint32_t _mail_q[4+(queue_sz)]; + uint32_t _mail_m[3+((sizeof(T)+3)/4)*(queue_sz)]; + void *_mail_p[2]; +#endif +}; + +} + +#endif +