Opencv 3.1 project on GR-PEACH board

Fork of gr-peach-opencv-project by the do

Committer:
thedo
Date:
Thu Jun 29 11:01:39 2017 +0000
Revision:
167:1657b442184c
Opencv 3.1 project on GR-PEACH board, 4 apps

Who changed what in which revision?

UserRevisionLine numberNew contents of line
thedo 167:1657b442184c 1
thedo 167:1657b442184c 2 /** \addtogroup platform */
thedo 167:1657b442184c 3 /** @{*/
thedo 167:1657b442184c 4 /* mbed Microcontroller Library
thedo 167:1657b442184c 5 * Copyright (c) 2006-2013 ARM Limited
thedo 167:1657b442184c 6 *
thedo 167:1657b442184c 7 * Licensed under the Apache License, Version 2.0 (the "License");
thedo 167:1657b442184c 8 * you may not use this file except in compliance with the License.
thedo 167:1657b442184c 9 * You may obtain a copy of the License at
thedo 167:1657b442184c 10 *
thedo 167:1657b442184c 11 * http://www.apache.org/licenses/LICENSE-2.0
thedo 167:1657b442184c 12 *
thedo 167:1657b442184c 13 * Unless required by applicable law or agreed to in writing, software
thedo 167:1657b442184c 14 * distributed under the License is distributed on an "AS IS" BASIS,
thedo 167:1657b442184c 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
thedo 167:1657b442184c 16 * See the License for the specific language governing permissions and
thedo 167:1657b442184c 17 * limitations under the License.
thedo 167:1657b442184c 18 */
thedo 167:1657b442184c 19 #ifndef SINGLETONPTR_H
thedo 167:1657b442184c 20 #define SINGLETONPTR_H
thedo 167:1657b442184c 21
thedo 167:1657b442184c 22 #include <stdint.h>
thedo 167:1657b442184c 23 #include <new>
thedo 167:1657b442184c 24 #include "platform/mbed_assert.h"
thedo 167:1657b442184c 25 #ifdef MBED_CONF_RTOS_PRESENT
thedo 167:1657b442184c 26 #include "cmsis_os2.h"
thedo 167:1657b442184c 27 #endif
thedo 167:1657b442184c 28
thedo 167:1657b442184c 29 #ifdef MBED_CONF_RTOS_PRESENT
thedo 167:1657b442184c 30 extern osMutexId_t singleton_mutex_id;
thedo 167:1657b442184c 31 #endif
thedo 167:1657b442184c 32
thedo 167:1657b442184c 33 /** Lock the singleton mutex
thedo 167:1657b442184c 34 *
thedo 167:1657b442184c 35 * This function is typically used to provide
thedo 167:1657b442184c 36 * exclusive access when initializing a
thedo 167:1657b442184c 37 * global object.
thedo 167:1657b442184c 38 */
thedo 167:1657b442184c 39 inline static void singleton_lock(void)
thedo 167:1657b442184c 40 {
thedo 167:1657b442184c 41 #ifdef MBED_CONF_RTOS_PRESENT
thedo 167:1657b442184c 42 osMutexAcquire(singleton_mutex_id, osWaitForever);
thedo 167:1657b442184c 43 #endif
thedo 167:1657b442184c 44 }
thedo 167:1657b442184c 45
thedo 167:1657b442184c 46 /** Unlock the singleton mutex
thedo 167:1657b442184c 47 *
thedo 167:1657b442184c 48 * This function is typically used to provide
thedo 167:1657b442184c 49 * exclusive access when initializing a
thedo 167:1657b442184c 50 * global object.
thedo 167:1657b442184c 51 */
thedo 167:1657b442184c 52 inline static void singleton_unlock(void)
thedo 167:1657b442184c 53 {
thedo 167:1657b442184c 54 #ifdef MBED_CONF_RTOS_PRESENT
thedo 167:1657b442184c 55 osMutexRelease (singleton_mutex_id);
thedo 167:1657b442184c 56 #endif
thedo 167:1657b442184c 57 }
thedo 167:1657b442184c 58 /** @}*/
thedo 167:1657b442184c 59
thedo 167:1657b442184c 60 /** Utility class for creating an using a singleton
thedo 167:1657b442184c 61 *
thedo 167:1657b442184c 62 * @note Synchronization level: Thread safe
thedo 167:1657b442184c 63 *
thedo 167:1657b442184c 64 * @note: This class must only be used in a static context -
thedo 167:1657b442184c 65 * this class must never be allocated or created on the
thedo 167:1657b442184c 66 * stack.
thedo 167:1657b442184c 67 *
thedo 167:1657b442184c 68 * @note: This class is lazily initialized on first use.
thedo 167:1657b442184c 69 * This class is a POD type so if it is not used it will
thedo 167:1657b442184c 70 * be garbage collected.
thedo 167:1657b442184c 71 * @ingroup platform
thedo 167:1657b442184c 72 */
thedo 167:1657b442184c 73 template <class T>
thedo 167:1657b442184c 74 struct SingletonPtr {
thedo 167:1657b442184c 75
thedo 167:1657b442184c 76 /** Get a pointer to the underlying singleton
thedo 167:1657b442184c 77 *
thedo 167:1657b442184c 78 * @returns
thedo 167:1657b442184c 79 * A pointer to the singleton
thedo 167:1657b442184c 80 */
thedo 167:1657b442184c 81 T* get() {
thedo 167:1657b442184c 82 if (NULL == _ptr) {
thedo 167:1657b442184c 83 singleton_lock();
thedo 167:1657b442184c 84 if (NULL == _ptr) {
thedo 167:1657b442184c 85 _ptr = new (_data) T();
thedo 167:1657b442184c 86 }
thedo 167:1657b442184c 87 singleton_unlock();
thedo 167:1657b442184c 88 }
thedo 167:1657b442184c 89 // _ptr was not zero initialized or was
thedo 167:1657b442184c 90 // corrupted if this assert is hit
thedo 167:1657b442184c 91 MBED_ASSERT(_ptr == (T *)&_data);
thedo 167:1657b442184c 92 return _ptr;
thedo 167:1657b442184c 93 }
thedo 167:1657b442184c 94
thedo 167:1657b442184c 95 /** Get a pointer to the underlying singleton
thedo 167:1657b442184c 96 *
thedo 167:1657b442184c 97 * @returns
thedo 167:1657b442184c 98 * A pointer to the singleton
thedo 167:1657b442184c 99 */
thedo 167:1657b442184c 100 T* operator->() {
thedo 167:1657b442184c 101 return get();
thedo 167:1657b442184c 102 }
thedo 167:1657b442184c 103
thedo 167:1657b442184c 104 // This is zero initialized when in global scope
thedo 167:1657b442184c 105 T *_ptr;
thedo 167:1657b442184c 106 // Force data to be 4 byte aligned
thedo 167:1657b442184c 107 uint32_t _data[(sizeof(T) + sizeof(uint32_t) - 1) / sizeof(uint32_t)];
thedo 167:1657b442184c 108 };
thedo 167:1657b442184c 109
thedo 167:1657b442184c 110 #endif
thedo 167:1657b442184c 111
thedo 167:1657b442184c 112