ian rau / mbed-rto

non blocking queue

Fork of mbed-rtos by mbed official

rtos/Mail.h@8:88a1a9c26ae3, 2012-11-27 (annotated)

Committer:
emilmont
Date:
Tue Nov 27 16:55:38 2012 +0000
Revision:
8:88a1a9c26ae3
Parent:
6:350b53afb889
Child:
31:015df9e602b6
Add "Thread::get_state" method.; Update license.; Update documentation.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 8:88a1a9c26ae3 1 /* mbed Microcontroller Library
emilmont 8:88a1a9c26ae3 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 8:88a1a9c26ae3 3 *
emilmont 8:88a1a9c26ae3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 8:88a1a9c26ae3 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 8:88a1a9c26ae3 6 * in the Software without restriction, including without limitation the rights
emilmont 8:88a1a9c26ae3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 8:88a1a9c26ae3 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 8:88a1a9c26ae3 9 * furnished to do so, subject to the following conditions:
emilmont 8:88a1a9c26ae3 10 *
emilmont 8:88a1a9c26ae3 11 * The above copyright notice and this permission notice shall be included in
emilmont 8:88a1a9c26ae3 12 * all copies or substantial portions of the Software.
emilmont 8:88a1a9c26ae3 13 *
emilmont 8:88a1a9c26ae3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 8:88a1a9c26ae3 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 8:88a1a9c26ae3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 8:88a1a9c26ae3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 8:88a1a9c26ae3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 8:88a1a9c26ae3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 8:88a1a9c26ae3 20 * SOFTWARE.
emilmont 8:88a1a9c26ae3 21 */
emilmont 8:88a1a9c26ae3 22 #ifndef MAIL_H
emilmont 8:88a1a9c26ae3 23 #define MAIL_H
emilmont 8:88a1a9c26ae3 24
emilmont 8:88a1a9c26ae3 25 #include <stdint.h>
emilmont 8:88a1a9c26ae3 26 #include <string.h>
emilmont 8:88a1a9c26ae3 27
emilmont 8:88a1a9c26ae3 28 #include "cmsis_os.h"
emilmont 8:88a1a9c26ae3 29
emilmont 8:88a1a9c26ae3 30 namespace rtos {
emilmont 8:88a1a9c26ae3 31
emilmont 8:88a1a9c26ae3 32 /** The Mail class allow to control, send, receive, or wait for mail.
emilmont 8:88a1a9c26ae3 33 A mail is a memory block that is send to a thread or interrupt service routine.
emilmont 8:88a1a9c26ae3 34 @tparam T data type of a single message element.
emilmont 8:88a1a9c26ae3 35 @tparam queue_sz maximum number of messages in queue.
emilmont 8:88a1a9c26ae3 36 */
emilmont 8:88a1a9c26ae3 37 template<typename T, uint32_t queue_sz>
emilmont 8:88a1a9c26ae3 38 class Mail {
emilmont 8:88a1a9c26ae3 39 public:
emilmont 8:88a1a9c26ae3 40 /** Create and Initialise Mail queue. */
emilmont 8:88a1a9c26ae3 41 Mail() {
emilmont 8:88a1a9c26ae3 42 #ifdef CMSIS_OS_RTX
emilmont 8:88a1a9c26ae3 43 memset(_mail_q, 0, sizeof(_mail_q));
emilmont 8:88a1a9c26ae3 44 _mail_p[0] = _mail_q;
emilmont 8:88a1a9c26ae3 45
emilmont 8:88a1a9c26ae3 46 memset(_mail_m, 0, sizeof(_mail_m));
emilmont 8:88a1a9c26ae3 47 _mail_p[1] = _mail_m;
emilmont 8:88a1a9c26ae3 48
emilmont 8:88a1a9c26ae3 49 _mail_def.pool = _mail_p;
emilmont 8:88a1a9c26ae3 50 _mail_def.queue_sz = queue_sz;
emilmont 8:88a1a9c26ae3 51 _mail_def.item_sz = sizeof(T);
emilmont 8:88a1a9c26ae3 52 #endif
emilmont 8:88a1a9c26ae3 53 _mail_id = osMailCreate(&_mail_def, NULL);
emilmont 8:88a1a9c26ae3 54 }
emilmont 8:88a1a9c26ae3 55
emilmont 8:88a1a9c26ae3 56 /** Allocate a memory block of type T
emilmont 8:88a1a9c26ae3 57 @param millisec timeout value or 0 in case of no time-out. (default: 0).
emilmont 8:88a1a9c26ae3 58 @return pointer to memory block that can be filled with mail or NULL in case error.
emilmont 8:88a1a9c26ae3 59 */
emilmont 8:88a1a9c26ae3 60 T* alloc(uint32_t millisec=0) {
emilmont 8:88a1a9c26ae3 61 return (T*)osMailAlloc(_mail_id, millisec);
emilmont 8:88a1a9c26ae3 62 }
emilmont 8:88a1a9c26ae3 63
emilmont 8:88a1a9c26ae3 64 /** Allocate a memory block of type T and set memory block to zero.
emilmont 8:88a1a9c26ae3 65 @param millisec timeout value or 0 in case of no time-out. (default: 0).
emilmont 8:88a1a9c26ae3 66 @return pointer to memory block that can be filled with mail or NULL in case error.
emilmont 8:88a1a9c26ae3 67 */
emilmont 8:88a1a9c26ae3 68 T* calloc(uint32_t millisec=0) {
emilmont 8:88a1a9c26ae3 69 return (T*)osMailCAlloc(_mail_id, millisec);
emilmont 8:88a1a9c26ae3 70 }
emilmont 8:88a1a9c26ae3 71
emilmont 8:88a1a9c26ae3 72 /** Put a mail in the queue.
emilmont 8:88a1a9c26ae3 73 @param mptr memory block previously allocated with Mail::alloc or Mail::calloc.
emilmont 8:88a1a9c26ae3 74 @return status code that indicates the execution status of the function.
emilmont 8:88a1a9c26ae3 75 */
emilmont 8:88a1a9c26ae3 76 osStatus put(T *mptr) {
emilmont 8:88a1a9c26ae3 77 return osMailPut(_mail_id, (void*)mptr);
emilmont 8:88a1a9c26ae3 78 }
emilmont 8:88a1a9c26ae3 79
emilmont 8:88a1a9c26ae3 80 /** Get a mail from a queue.
emilmont 8:88a1a9c26ae3 81 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
emilmont 8:88a1a9c26ae3 82 @return event that contains mail information or error code.
emilmont 8:88a1a9c26ae3 83 */
emilmont 8:88a1a9c26ae3 84 osEvent get(uint32_t millisec=osWaitForever) {
emilmont 8:88a1a9c26ae3 85 return osMailGet(_mail_id, millisec);
emilmont 8:88a1a9c26ae3 86 }
emilmont 8:88a1a9c26ae3 87
emilmont 8:88a1a9c26ae3 88 /** Free a memory block from a mail.
emilmont 8:88a1a9c26ae3 89 @param mptr pointer to the memory block that was obtained with Mail::get.
emilmont 8:88a1a9c26ae3 90 @return status code that indicates the execution status of the function.
emilmont 8:88a1a9c26ae3 91 */
emilmont 8:88a1a9c26ae3 92 osStatus free(T *mptr) {
emilmont 8:88a1a9c26ae3 93 return osMailFree(_mail_id, (void*)mptr);
emilmont 8:88a1a9c26ae3 94 }
emilmont 8:88a1a9c26ae3 95
emilmont 8:88a1a9c26ae3 96 private:
emilmont 8:88a1a9c26ae3 97 osMailQId _mail_id;
emilmont 8:88a1a9c26ae3 98 osMailQDef_t _mail_def;
emilmont 8:88a1a9c26ae3 99 #ifdef CMSIS_OS_RTX
emilmont 8:88a1a9c26ae3 100 uint32_t _mail_q[4+(queue_sz)];
emilmont 8:88a1a9c26ae3 101 uint32_t _mail_m[3+((sizeof(T)+3)/4)*(queue_sz)];
emilmont 8:88a1a9c26ae3 102 void *_mail_p[2];
emilmont 8:88a1a9c26ae3 103 #endif
emilmont 8:88a1a9c26ae3 104 };
emilmont 8:88a1a9c26ae3 105
emilmont 8:88a1a9c26ae3 106 }
emilmont 8:88a1a9c26ae3 107
emilmont 8:88a1a9c26ae3 108 #endif
emilmont 8:88a1a9c26ae3 109