VZTECH / mbed-rtos_old

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Fork of mbed-rtos by mbed official

rtos/Queue.h@40:bd07334df5b1, 2014-08-15 (annotated)

Committer:
mbed_official
Date:
Fri Aug 15 16:30:22 2014 +0100
Revision:
40:bd07334df5b1
Parent:
36:512640f00564 
Synchronized with git revision 601712595f49bbd2a2771c52cf3e84c9c7a591af



Full URL: https://github.com/mbedmicro/mbed/commit/601712595f49bbd2a2771c52cf3e84c9c7a591af/

Who changed what in which revision?

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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 QUEUE_H
emilmont 8:88a1a9c26ae3 23 #define QUEUE_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"
mbed_official 40:bd07334df5b1 29 #include "mbed_error.h"
emilmont 8:88a1a9c26ae3 30
emilmont 8:88a1a9c26ae3 31 namespace rtos {
emilmont 8:88a1a9c26ae3 32
emilmont 8:88a1a9c26ae3 33 /** The Queue class allow to control, send, receive, or wait for messages.
emilmont 8:88a1a9c26ae3 34 A message can be a integer or pointer value to a certain type T that is send
emilmont 8:88a1a9c26ae3 35 to a thread or interrupt service routine.
emilmont 8:88a1a9c26ae3 36 @tparam T data type of a single message element.
emilmont 8:88a1a9c26ae3 37 @tparam queue_sz maximum number of messages in queue.
emilmont 8:88a1a9c26ae3 38 */
emilmont 8:88a1a9c26ae3 39 template<typename T, uint32_t queue_sz>
emilmont 8:88a1a9c26ae3 40 class Queue {
emilmont 8:88a1a9c26ae3 41 public:
emilmont 8:88a1a9c26ae3 42 /** Create and initialise a message Queue. */
emilmont 8:88a1a9c26ae3 43 Queue() {
emilmont 8:88a1a9c26ae3 44 #ifdef CMSIS_OS_RTX
emilmont 8:88a1a9c26ae3 45 memset(_queue_q, 0, sizeof(_queue_q));
emilmont 8:88a1a9c26ae3 46 _queue_def.pool = _queue_q;
emilmont 8:88a1a9c26ae3 47 _queue_def.queue_sz = queue_sz;
emilmont 8:88a1a9c26ae3 48 #endif
emilmont 8:88a1a9c26ae3 49 _queue_id = osMessageCreate(&_queue_def, NULL);
emilmont 8:88a1a9c26ae3 50 if (_queue_id == NULL) {
emilmont 8:88a1a9c26ae3 51 error("Error initialising the queue object\n");
emilmont 8:88a1a9c26ae3 52 }
emilmont 8:88a1a9c26ae3 53 }
mbed_official 31:015df9e602b6 54
emilmont 8:88a1a9c26ae3 55 /** Put a message in a Queue.
emilmont 8:88a1a9c26ae3 56 @param data message pointer.
emilmont 8:88a1a9c26ae3 57 @param millisec timeout value or 0 in case of no time-out. (default: 0)
mbed_official 31:015df9e602b6 58 @return status code that indicates the execution status of the function.
emilmont 8:88a1a9c26ae3 59 */
emilmont 8:88a1a9c26ae3 60 osStatus put(T* data, uint32_t millisec=0) {
emilmont 8:88a1a9c26ae3 61 return osMessagePut(_queue_id, (uint32_t)data, millisec);
emilmont 8:88a1a9c26ae3 62 }
mbed_official 31:015df9e602b6 63
emilmont 8:88a1a9c26ae3 64 /** Get a message or Wait for a message from a Queue.
emilmont 8:88a1a9c26ae3 65 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
emilmont 8:88a1a9c26ae3 66 @return event information that includes the message and the status code.
emilmont 8:88a1a9c26ae3 67 */
emilmont 8:88a1a9c26ae3 68 osEvent get(uint32_t millisec=osWaitForever) {
emilmont 8:88a1a9c26ae3 69 return osMessageGet(_queue_id, millisec);
emilmont 8:88a1a9c26ae3 70 }
emilmont 8:88a1a9c26ae3 71
emilmont 8:88a1a9c26ae3 72 private:
emilmont 8:88a1a9c26ae3 73 osMessageQId _queue_id;
emilmont 8:88a1a9c26ae3 74 osMessageQDef_t _queue_def;
emilmont 8:88a1a9c26ae3 75 #ifdef CMSIS_OS_RTX
emilmont 8:88a1a9c26ae3 76 uint32_t _queue_q[4+(queue_sz)];
emilmont 8:88a1a9c26ae3 77 #endif
emilmont 8:88a1a9c26ae3 78 };
emilmont 8:88a1a9c26ae3 79
emilmont 8:88a1a9c26ae3 80 }
emilmont 8:88a1a9c26ae3 81 #endif