UVic Assistive Technology Lab / Mbed 2 deprecated DSLR_Camera_Gimbal

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Dependencies:   mbed ros_lib_kinetic

mbed/FunctionPointer.h@15:aeb817f93336, 2018-12-14 (annotated)

Committer:
MikeGray92
Date:
Fri Dec 14 22:35:36 2018 +0000
Revision:
15:aeb817f93336
Parent:
0:3a767f41cf04 
Removed some unused code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-UVic-Assistive-Technolog 0:3a767f41cf04 1 /* mbed Microcontroller Library
group-UVic-Assistive-Technolog 0:3a767f41cf04 2 * Copyright (c) 2006-2015 ARM Limited
group-UVic-Assistive-Technolog 0:3a767f41cf04 3 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-UVic-Assistive-Technolog 0:3a767f41cf04 5 * you may not use this file except in compliance with the License.
group-UVic-Assistive-Technolog 0:3a767f41cf04 6 * You may obtain a copy of the License at
group-UVic-Assistive-Technolog 0:3a767f41cf04 7 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 8 * http://www.apache.org/licenses/LICENSE-2.0
group-UVic-Assistive-Technolog 0:3a767f41cf04 9 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 10 * Unless required by applicable law or agreed to in writing, software
group-UVic-Assistive-Technolog 0:3a767f41cf04 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-UVic-Assistive-Technolog 0:3a767f41cf04 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-UVic-Assistive-Technolog 0:3a767f41cf04 13 * See the License for the specific language governing permissions and
group-UVic-Assistive-Technolog 0:3a767f41cf04 14 * limitations under the License.
group-UVic-Assistive-Technolog 0:3a767f41cf04 15 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 16 #ifndef MBED_FUNCTIONPOINTER_H
group-UVic-Assistive-Technolog 0:3a767f41cf04 17 #define MBED_FUNCTIONPOINTER_H
group-UVic-Assistive-Technolog 0:3a767f41cf04 18
group-UVic-Assistive-Technolog 0:3a767f41cf04 19 #include <string.h>
group-UVic-Assistive-Technolog 0:3a767f41cf04 20 #include <stdint.h>
group-UVic-Assistive-Technolog 0:3a767f41cf04 21
group-UVic-Assistive-Technolog 0:3a767f41cf04 22 namespace mbed {
group-UVic-Assistive-Technolog 0:3a767f41cf04 23
group-UVic-Assistive-Technolog 0:3a767f41cf04 24 /* If we had variaditic templates, this wouldn't be a problem, but until C++11 is enabled, we are stuck with multiple classes... */
group-UVic-Assistive-Technolog 0:3a767f41cf04 25
group-UVic-Assistive-Technolog 0:3a767f41cf04 26 /** A class for storing and calling a pointer to a static or member function
group-UVic-Assistive-Technolog 0:3a767f41cf04 27 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 28 template <typename R, typename A1>
group-UVic-Assistive-Technolog 0:3a767f41cf04 29 class FunctionPointerArg1{
group-UVic-Assistive-Technolog 0:3a767f41cf04 30 public:
group-UVic-Assistive-Technolog 0:3a767f41cf04 31 /** Create a FunctionPointer, attaching a static function
group-UVic-Assistive-Technolog 0:3a767f41cf04 32 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 33 * @param function The static function to attach (default is none)
group-UVic-Assistive-Technolog 0:3a767f41cf04 34 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 35 FunctionPointerArg1(R (*function)(A1) = 0) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 36 attach(function);
group-UVic-Assistive-Technolog 0:3a767f41cf04 37 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 38
group-UVic-Assistive-Technolog 0:3a767f41cf04 39 /** Create a FunctionPointer, attaching a member function
group-UVic-Assistive-Technolog 0:3a767f41cf04 40 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 41 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
group-UVic-Assistive-Technolog 0:3a767f41cf04 42 * @param function The address of the member function to attach
group-UVic-Assistive-Technolog 0:3a767f41cf04 43 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 44 template<typename T>
group-UVic-Assistive-Technolog 0:3a767f41cf04 45 FunctionPointerArg1(T *object, R (T::*member)(A1)) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 46 attach(object, member);
group-UVic-Assistive-Technolog 0:3a767f41cf04 47 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 48
group-UVic-Assistive-Technolog 0:3a767f41cf04 49 /** Attach a static function
group-UVic-Assistive-Technolog 0:3a767f41cf04 50 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 51 * @param function The static function to attach (default is none)
group-UVic-Assistive-Technolog 0:3a767f41cf04 52 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 53 void attach(R (*function)(A1)) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 54 _p.function = function;
group-UVic-Assistive-Technolog 0:3a767f41cf04 55 _membercaller = 0;
group-UVic-Assistive-Technolog 0:3a767f41cf04 56 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 57
group-UVic-Assistive-Technolog 0:3a767f41cf04 58 /** Attach a member function
group-UVic-Assistive-Technolog 0:3a767f41cf04 59 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 60 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
group-UVic-Assistive-Technolog 0:3a767f41cf04 61 * @param function The address of the member function to attach
group-UVic-Assistive-Technolog 0:3a767f41cf04 62 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 63 template<typename T>
group-UVic-Assistive-Technolog 0:3a767f41cf04 64 void attach(T *object, R (T::*member)(A1)) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 65 _p.object = static_cast<void*>(object);
group-UVic-Assistive-Technolog 0:3a767f41cf04 66 *reinterpret_cast<R (T::**)(A1)>(_member) = member;
group-UVic-Assistive-Technolog 0:3a767f41cf04 67 _membercaller = &FunctionPointerArg1::membercaller<T>;
group-UVic-Assistive-Technolog 0:3a767f41cf04 68 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 69
group-UVic-Assistive-Technolog 0:3a767f41cf04 70 /** Call the attached static or member function
group-UVic-Assistive-Technolog 0:3a767f41cf04 71 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 72 R call(A1 a) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 73 if (_membercaller == 0 && _p.function) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 74 return _p.function(a);
group-UVic-Assistive-Technolog 0:3a767f41cf04 75 } else if (_membercaller && _p.object) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 76 return _membercaller(_p.object, _member, a);
group-UVic-Assistive-Technolog 0:3a767f41cf04 77 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 78 return (R)0;
group-UVic-Assistive-Technolog 0:3a767f41cf04 79 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 80
group-UVic-Assistive-Technolog 0:3a767f41cf04 81 /** Get registered static function
group-UVic-Assistive-Technolog 0:3a767f41cf04 82 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 83 R(*get_function(A1))() {
group-UVic-Assistive-Technolog 0:3a767f41cf04 84 return _membercaller ? (R(*)(A1))0 : (R(*)(A1))_p.function;
group-UVic-Assistive-Technolog 0:3a767f41cf04 85 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 86
group-UVic-Assistive-Technolog 0:3a767f41cf04 87 #ifdef MBED_OPERATORS
group-UVic-Assistive-Technolog 0:3a767f41cf04 88 R operator ()(A1 a) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 89 return call(a);
group-UVic-Assistive-Technolog 0:3a767f41cf04 90 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 91 operator bool(void) const {
group-UVic-Assistive-Technolog 0:3a767f41cf04 92 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
group-UVic-Assistive-Technolog 0:3a767f41cf04 93 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 94 #endif
group-UVic-Assistive-Technolog 0:3a767f41cf04 95 private:
group-UVic-Assistive-Technolog 0:3a767f41cf04 96 template<typename T>
group-UVic-Assistive-Technolog 0:3a767f41cf04 97 static R membercaller(void *object, uintptr_t *member, A1 a) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 98 T* o = static_cast<T*>(object);
group-UVic-Assistive-Technolog 0:3a767f41cf04 99 R (T::**m)(A1) = reinterpret_cast<R (T::**)(A1)>(member);
group-UVic-Assistive-Technolog 0:3a767f41cf04 100 return (o->**m)(a);
group-UVic-Assistive-Technolog 0:3a767f41cf04 101 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 102
group-UVic-Assistive-Technolog 0:3a767f41cf04 103 union {
group-UVic-Assistive-Technolog 0:3a767f41cf04 104 R (*function)(A1); // static function pointer
group-UVic-Assistive-Technolog 0:3a767f41cf04 105 void *object; // object this pointer
group-UVic-Assistive-Technolog 0:3a767f41cf04 106 } _p;
group-UVic-Assistive-Technolog 0:3a767f41cf04 107 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
group-UVic-Assistive-Technolog 0:3a767f41cf04 108 R (*_membercaller)(void*, uintptr_t*, A1); // registered membercaller function to convert back and call _m.member on _object
group-UVic-Assistive-Technolog 0:3a767f41cf04 109 };
group-UVic-Assistive-Technolog 0:3a767f41cf04 110
group-UVic-Assistive-Technolog 0:3a767f41cf04 111 /** A class for storing and calling a pointer to a static or member function (R ()(void))
group-UVic-Assistive-Technolog 0:3a767f41cf04 112 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 113 template <typename R>
group-UVic-Assistive-Technolog 0:3a767f41cf04 114 class FunctionPointerArg1<R, void>{
group-UVic-Assistive-Technolog 0:3a767f41cf04 115 public:
group-UVic-Assistive-Technolog 0:3a767f41cf04 116 /** Create a FunctionPointer, attaching a static function
group-UVic-Assistive-Technolog 0:3a767f41cf04 117 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 118 * @param function The static function to attach (default is none)
group-UVic-Assistive-Technolog 0:3a767f41cf04 119 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 120 FunctionPointerArg1(R (*function)(void) = 0) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 121 attach(function);
group-UVic-Assistive-Technolog 0:3a767f41cf04 122 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 123
group-UVic-Assistive-Technolog 0:3a767f41cf04 124 /** Create a FunctionPointer, attaching a member function
group-UVic-Assistive-Technolog 0:3a767f41cf04 125 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 126 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
group-UVic-Assistive-Technolog 0:3a767f41cf04 127 * @param function The address of the void member function to attach
group-UVic-Assistive-Technolog 0:3a767f41cf04 128 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 129 template<typename T>
group-UVic-Assistive-Technolog 0:3a767f41cf04 130 FunctionPointerArg1(T *object, R (T::*member)(void)) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 131 attach(object, member);
group-UVic-Assistive-Technolog 0:3a767f41cf04 132 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 133
group-UVic-Assistive-Technolog 0:3a767f41cf04 134 /** Attach a static function
group-UVic-Assistive-Technolog 0:3a767f41cf04 135 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 136 * @param function The void static function to attach (default is none)
group-UVic-Assistive-Technolog 0:3a767f41cf04 137 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 138 void attach(R (*function)(void)) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 139 _p.function = function;
group-UVic-Assistive-Technolog 0:3a767f41cf04 140 _membercaller = 0;
group-UVic-Assistive-Technolog 0:3a767f41cf04 141 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 142
group-UVic-Assistive-Technolog 0:3a767f41cf04 143 /** Attach a member function
group-UVic-Assistive-Technolog 0:3a767f41cf04 144 *
group-UVic-Assistive-Technolog 0:3a767f41cf04 145 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
group-UVic-Assistive-Technolog 0:3a767f41cf04 146 * @param function The address of the void member function to attach
group-UVic-Assistive-Technolog 0:3a767f41cf04 147 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 148 template<typename T>
group-UVic-Assistive-Technolog 0:3a767f41cf04 149 void attach(T *object, R (T::*member)(void)) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 150 _p.object = static_cast<void*>(object);
group-UVic-Assistive-Technolog 0:3a767f41cf04 151 *reinterpret_cast<R (T::**)(void)>(_member) = member;
group-UVic-Assistive-Technolog 0:3a767f41cf04 152 _membercaller = &FunctionPointerArg1::membercaller<T>;
group-UVic-Assistive-Technolog 0:3a767f41cf04 153 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 154
group-UVic-Assistive-Technolog 0:3a767f41cf04 155 /** Call the attached static or member function
group-UVic-Assistive-Technolog 0:3a767f41cf04 156 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 157 R call(){
group-UVic-Assistive-Technolog 0:3a767f41cf04 158 if (_membercaller == 0 && _p.function) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 159 return _p.function();
group-UVic-Assistive-Technolog 0:3a767f41cf04 160 } else if (_membercaller && _p.object) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 161 return _membercaller(_p.object, _member);
group-UVic-Assistive-Technolog 0:3a767f41cf04 162 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 163 return (R)0;
group-UVic-Assistive-Technolog 0:3a767f41cf04 164 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 165
group-UVic-Assistive-Technolog 0:3a767f41cf04 166 /** Get registered static function
group-UVic-Assistive-Technolog 0:3a767f41cf04 167 */
group-UVic-Assistive-Technolog 0:3a767f41cf04 168 R(*get_function())() {
group-UVic-Assistive-Technolog 0:3a767f41cf04 169 return _membercaller ? (R(*)())0 : (R(*)())_p.function;
group-UVic-Assistive-Technolog 0:3a767f41cf04 170 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 171
group-UVic-Assistive-Technolog 0:3a767f41cf04 172 #ifdef MBED_OPERATORS
group-UVic-Assistive-Technolog 0:3a767f41cf04 173 R operator ()(void) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 174 return call();
group-UVic-Assistive-Technolog 0:3a767f41cf04 175 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 176 operator bool(void) const {
group-UVic-Assistive-Technolog 0:3a767f41cf04 177 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
group-UVic-Assistive-Technolog 0:3a767f41cf04 178 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 179 #endif
group-UVic-Assistive-Technolog 0:3a767f41cf04 180
group-UVic-Assistive-Technolog 0:3a767f41cf04 181 private:
group-UVic-Assistive-Technolog 0:3a767f41cf04 182 template<typename T>
group-UVic-Assistive-Technolog 0:3a767f41cf04 183 static R membercaller(void *object, uintptr_t *member) {
group-UVic-Assistive-Technolog 0:3a767f41cf04 184 T* o = static_cast<T*>(object);
group-UVic-Assistive-Technolog 0:3a767f41cf04 185 R (T::**m)(void) = reinterpret_cast<R (T::**)(void)>(member);
group-UVic-Assistive-Technolog 0:3a767f41cf04 186 return (o->**m)();
group-UVic-Assistive-Technolog 0:3a767f41cf04 187 }
group-UVic-Assistive-Technolog 0:3a767f41cf04 188
group-UVic-Assistive-Technolog 0:3a767f41cf04 189 union {
group-UVic-Assistive-Technolog 0:3a767f41cf04 190 R (*function)(void); // static function pointer
group-UVic-Assistive-Technolog 0:3a767f41cf04 191 void *object; // object this pointer
group-UVic-Assistive-Technolog 0:3a767f41cf04 192 } _p;
group-UVic-Assistive-Technolog 0:3a767f41cf04 193 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
group-UVic-Assistive-Technolog 0:3a767f41cf04 194 R (*_membercaller)(void*, uintptr_t*); // registered membercaller function to convert back and call _m.member on _object
group-UVic-Assistive-Technolog 0:3a767f41cf04 195 };
group-UVic-Assistive-Technolog 0:3a767f41cf04 196
group-UVic-Assistive-Technolog 0:3a767f41cf04 197 typedef FunctionPointerArg1<void, void> FunctionPointer;
group-UVic-Assistive-Technolog 0:3a767f41cf04 198 typedef FunctionPointerArg1<void, int> event_callback_t;
group-UVic-Assistive-Technolog 0:3a767f41cf04 199
group-UVic-Assistive-Technolog 0:3a767f41cf04 200 } // namespace mbed
group-UVic-Assistive-Technolog 0:3a767f41cf04 201
group-UVic-Assistive-Technolog 0:3a767f41cf04 202 #endif