MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/platform/SingletonPtr.h@46:b156ef445742, 2017-06-03 (annotated)

Committer:
sahilmgandhi
Date:
Sat Jun 03 00:22:44 2017 +0000
Revision:
46:b156ef445742
Parent:
18:6a4db94011d3 
Final code for internal battlebot competition.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1
sahilmgandhi 18:6a4db94011d3 2 /** \addtogroup platform */
sahilmgandhi 18:6a4db94011d3 3 /** @{*/
sahilmgandhi 18:6a4db94011d3 4 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 5 * Copyright (c) 2006-2013 ARM Limited
sahilmgandhi 18:6a4db94011d3 6 *
sahilmgandhi 18:6a4db94011d3 7 * Licensed under the Apache License, Version 2.0 (the "License");
sahilmgandhi 18:6a4db94011d3 8 * you may not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 9 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 10 *
sahilmgandhi 18:6a4db94011d3 11 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 12 *
sahilmgandhi 18:6a4db94011d3 13 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 14 * distributed under the License is distributed on an "AS IS" BASIS,
sahilmgandhi 18:6a4db94011d3 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 16 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 17 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 18 */
sahilmgandhi 18:6a4db94011d3 19 #ifndef SINGLETONPTR_H
sahilmgandhi 18:6a4db94011d3 20 #define SINGLETONPTR_H
sahilmgandhi 18:6a4db94011d3 21
sahilmgandhi 18:6a4db94011d3 22 #include <stdint.h>
sahilmgandhi 18:6a4db94011d3 23 #include <new>
sahilmgandhi 18:6a4db94011d3 24 #include "platform/mbed_assert.h"
sahilmgandhi 18:6a4db94011d3 25 #ifdef MBED_CONF_RTOS_PRESENT
sahilmgandhi 18:6a4db94011d3 26 #include "cmsis_os.h"
sahilmgandhi 18:6a4db94011d3 27 #endif
sahilmgandhi 18:6a4db94011d3 28
sahilmgandhi 18:6a4db94011d3 29 #ifdef MBED_CONF_RTOS_PRESENT
sahilmgandhi 18:6a4db94011d3 30 extern osMutexId singleton_mutex_id;
sahilmgandhi 18:6a4db94011d3 31 #endif
sahilmgandhi 18:6a4db94011d3 32
sahilmgandhi 18:6a4db94011d3 33 /** Lock the singleton mutex
sahilmgandhi 18:6a4db94011d3 34 *
sahilmgandhi 18:6a4db94011d3 35 * This function is typically used to provide
sahilmgandhi 18:6a4db94011d3 36 * exclusive access when initializing a
sahilmgandhi 18:6a4db94011d3 37 * global object.
sahilmgandhi 18:6a4db94011d3 38 */
sahilmgandhi 18:6a4db94011d3 39 inline static void singleton_lock(void)
sahilmgandhi 18:6a4db94011d3 40 {
sahilmgandhi 18:6a4db94011d3 41 #ifdef MBED_CONF_RTOS_PRESENT
sahilmgandhi 18:6a4db94011d3 42 osMutexWait(singleton_mutex_id, osWaitForever);
sahilmgandhi 18:6a4db94011d3 43 #endif
sahilmgandhi 18:6a4db94011d3 44 }
sahilmgandhi 18:6a4db94011d3 45
sahilmgandhi 18:6a4db94011d3 46 /** Unlock the singleton mutex
sahilmgandhi 18:6a4db94011d3 47 *
sahilmgandhi 18:6a4db94011d3 48 * This function is typically used to provide
sahilmgandhi 18:6a4db94011d3 49 * exclusive access when initializing a
sahilmgandhi 18:6a4db94011d3 50 * global object.
sahilmgandhi 18:6a4db94011d3 51 */
sahilmgandhi 18:6a4db94011d3 52 inline static void singleton_unlock(void)
sahilmgandhi 18:6a4db94011d3 53 {
sahilmgandhi 18:6a4db94011d3 54 #ifdef MBED_CONF_RTOS_PRESENT
sahilmgandhi 18:6a4db94011d3 55 osMutexRelease (singleton_mutex_id);
sahilmgandhi 18:6a4db94011d3 56 #endif
sahilmgandhi 18:6a4db94011d3 57 }
sahilmgandhi 18:6a4db94011d3 58
sahilmgandhi 18:6a4db94011d3 59 /** Utility class for creating an using a singleton
sahilmgandhi 18:6a4db94011d3 60 *
sahilmgandhi 18:6a4db94011d3 61 * @Note Synchronization level: Thread safe
sahilmgandhi 18:6a4db94011d3 62 *
sahilmgandhi 18:6a4db94011d3 63 * @Note: This class must only be used in a static context -
sahilmgandhi 18:6a4db94011d3 64 * this class must never be allocated or created on the
sahilmgandhi 18:6a4db94011d3 65 * stack.
sahilmgandhi 18:6a4db94011d3 66 *
sahilmgandhi 18:6a4db94011d3 67 * @Note: This class is lazily initialized on first use.
sahilmgandhi 18:6a4db94011d3 68 * This class is a POD type so if it is not used it will
sahilmgandhi 18:6a4db94011d3 69 * be garbage collected.
sahilmgandhi 18:6a4db94011d3 70 */
sahilmgandhi 18:6a4db94011d3 71 template <class T>
sahilmgandhi 18:6a4db94011d3 72 struct SingletonPtr {
sahilmgandhi 18:6a4db94011d3 73
sahilmgandhi 18:6a4db94011d3 74 /** Get a pointer to the underlying singleton
sahilmgandhi 18:6a4db94011d3 75 *
sahilmgandhi 18:6a4db94011d3 76 * @returns
sahilmgandhi 18:6a4db94011d3 77 * A pointer to the singleton
sahilmgandhi 18:6a4db94011d3 78 */
sahilmgandhi 18:6a4db94011d3 79 T* get() {
sahilmgandhi 18:6a4db94011d3 80 if (NULL == _ptr) {
sahilmgandhi 18:6a4db94011d3 81 singleton_lock();
sahilmgandhi 18:6a4db94011d3 82 if (NULL == _ptr) {
sahilmgandhi 18:6a4db94011d3 83 _ptr = new (_data) T();
sahilmgandhi 18:6a4db94011d3 84 }
sahilmgandhi 18:6a4db94011d3 85 singleton_unlock();
sahilmgandhi 18:6a4db94011d3 86 }
sahilmgandhi 18:6a4db94011d3 87 // _ptr was not zero initialized or was
sahilmgandhi 18:6a4db94011d3 88 // corrupted if this assert is hit
sahilmgandhi 18:6a4db94011d3 89 MBED_ASSERT(_ptr == (T *)&_data);
sahilmgandhi 18:6a4db94011d3 90 return _ptr;
sahilmgandhi 18:6a4db94011d3 91 }
sahilmgandhi 18:6a4db94011d3 92
sahilmgandhi 18:6a4db94011d3 93 /** Get a pointer to the underlying singleton
sahilmgandhi 18:6a4db94011d3 94 *
sahilmgandhi 18:6a4db94011d3 95 * @returns
sahilmgandhi 18:6a4db94011d3 96 * A pointer to the singleton
sahilmgandhi 18:6a4db94011d3 97 */
sahilmgandhi 18:6a4db94011d3 98 T* operator->() {
sahilmgandhi 18:6a4db94011d3 99 return get();
sahilmgandhi 18:6a4db94011d3 100 }
sahilmgandhi 18:6a4db94011d3 101
sahilmgandhi 18:6a4db94011d3 102 // This is zero initialized when in global scope
sahilmgandhi 18:6a4db94011d3 103 T *_ptr;
sahilmgandhi 18:6a4db94011d3 104 // Force data to be 4 byte aligned
sahilmgandhi 18:6a4db94011d3 105 uint32_t _data[(sizeof(T) + sizeof(uint32_t) - 1) / sizeof(uint32_t)];
sahilmgandhi 18:6a4db94011d3 106 };
sahilmgandhi 18:6a4db94011d3 107
sahilmgandhi 18:6a4db94011d3 108 #endif
sahilmgandhi 18:6a4db94011d3 109
sahilmgandhi 18:6a4db94011d3 110 /** @}*/