Tamura Mizuki / STM32F746_FFT

fft

Dependencies:   BSP_DISCO_F746NG SDFileSystem_Warning_Fixed

mbed_src_STM32F7/api/FunctionPointer.h@3:6f7e05dd8d15, 2020-03-06 (annotated)

Committer:
aria19970520
Date:
Fri Mar 06 06:52:14 2020 +0000
Revision:
3:6f7e05dd8d15
Parent:
0:3e46577dc273 
fft

Who changed what in which revision?

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MikamiUitOpen 0:3e46577dc273 1 /* mbed Microcontroller Library
MikamiUitOpen 0:3e46577dc273 2 * Copyright (c) 2006-2015 ARM Limited
MikamiUitOpen 0:3e46577dc273 3 *
MikamiUitOpen 0:3e46577dc273 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 0:3e46577dc273 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 0:3e46577dc273 6 * You may obtain a copy of the License at
MikamiUitOpen 0:3e46577dc273 7 *
MikamiUitOpen 0:3e46577dc273 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 0:3e46577dc273 9 *
MikamiUitOpen 0:3e46577dc273 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 0:3e46577dc273 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 0:3e46577dc273 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 0:3e46577dc273 13 * See the License for the specific language governing permissions and
MikamiUitOpen 0:3e46577dc273 14 * limitations under the License.
MikamiUitOpen 0:3e46577dc273 15 */
MikamiUitOpen 0:3e46577dc273 16 #ifndef MBED_FUNCTIONPOINTER_H
MikamiUitOpen 0:3e46577dc273 17 #define MBED_FUNCTIONPOINTER_H
MikamiUitOpen 0:3e46577dc273 18
MikamiUitOpen 0:3e46577dc273 19 #include <string.h>
MikamiUitOpen 0:3e46577dc273 20 #include <stdint.h>
MikamiUitOpen 0:3e46577dc273 21
MikamiUitOpen 0:3e46577dc273 22 namespace mbed {
MikamiUitOpen 0:3e46577dc273 23
MikamiUitOpen 0:3e46577dc273 24 /* If we had variaditic templates, this wouldn't be a problem, but until C++11 is enabled, we are stuck with multiple classes... */
MikamiUitOpen 0:3e46577dc273 25
MikamiUitOpen 0:3e46577dc273 26 /** A class for storing and calling a pointer to a static or member function
MikamiUitOpen 0:3e46577dc273 27 */
MikamiUitOpen 0:3e46577dc273 28 template <typename R, typename A1>
MikamiUitOpen 0:3e46577dc273 29 class FunctionPointerArg1{
MikamiUitOpen 0:3e46577dc273 30 public:
MikamiUitOpen 0:3e46577dc273 31 /** Create a FunctionPointer, attaching a static function
MikamiUitOpen 0:3e46577dc273 32 *
MikamiUitOpen 0:3e46577dc273 33 * @param function The static function to attach (default is none)
MikamiUitOpen 0:3e46577dc273 34 */
MikamiUitOpen 0:3e46577dc273 35 FunctionPointerArg1(R (*function)(A1) = 0) {
MikamiUitOpen 0:3e46577dc273 36 attach(function);
MikamiUitOpen 0:3e46577dc273 37 }
MikamiUitOpen 0:3e46577dc273 38
MikamiUitOpen 0:3e46577dc273 39 /** Create a FunctionPointer, attaching a member function
MikamiUitOpen 0:3e46577dc273 40 *
MikamiUitOpen 0:3e46577dc273 41 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
MikamiUitOpen 0:3e46577dc273 42 * @param function The address of the member function to attach
MikamiUitOpen 0:3e46577dc273 43 */
MikamiUitOpen 0:3e46577dc273 44 template<typename T>
MikamiUitOpen 0:3e46577dc273 45 FunctionPointerArg1(T *object, R (T::*member)(A1)) {
MikamiUitOpen 0:3e46577dc273 46 attach(object, member);
MikamiUitOpen 0:3e46577dc273 47 }
MikamiUitOpen 0:3e46577dc273 48
MikamiUitOpen 0:3e46577dc273 49 /** Attach a static function
MikamiUitOpen 0:3e46577dc273 50 *
MikamiUitOpen 0:3e46577dc273 51 * @param function The static function to attach (default is none)
MikamiUitOpen 0:3e46577dc273 52 */
MikamiUitOpen 0:3e46577dc273 53 void attach(R (*function)(A1)) {
MikamiUitOpen 0:3e46577dc273 54 _p.function = function;
MikamiUitOpen 0:3e46577dc273 55 _membercaller = 0;
MikamiUitOpen 0:3e46577dc273 56 }
MikamiUitOpen 0:3e46577dc273 57
MikamiUitOpen 0:3e46577dc273 58 /** Attach a member function
MikamiUitOpen 0:3e46577dc273 59 *
MikamiUitOpen 0:3e46577dc273 60 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
MikamiUitOpen 0:3e46577dc273 61 * @param function The address of the member function to attach
MikamiUitOpen 0:3e46577dc273 62 */
MikamiUitOpen 0:3e46577dc273 63 template<typename T>
MikamiUitOpen 0:3e46577dc273 64 void attach(T *object, R (T::*member)(A1)) {
MikamiUitOpen 0:3e46577dc273 65 _p.object = static_cast<void*>(object);
MikamiUitOpen 0:3e46577dc273 66 *reinterpret_cast<R (T::**)(A1)>(_member) = member;
MikamiUitOpen 0:3e46577dc273 67 _membercaller = &FunctionPointerArg1::membercaller<T>;
MikamiUitOpen 0:3e46577dc273 68 }
MikamiUitOpen 0:3e46577dc273 69
MikamiUitOpen 0:3e46577dc273 70 /** Call the attached static or member function
MikamiUitOpen 0:3e46577dc273 71 */
MikamiUitOpen 0:3e46577dc273 72 R call(A1 a) {
MikamiUitOpen 0:3e46577dc273 73 if (_membercaller == 0 && _p.function) {
MikamiUitOpen 0:3e46577dc273 74 return _p.function(a);
MikamiUitOpen 0:3e46577dc273 75 } else if (_membercaller && _p.object) {
MikamiUitOpen 0:3e46577dc273 76 return _membercaller(_p.object, _member, a);
MikamiUitOpen 0:3e46577dc273 77 }
MikamiUitOpen 0:3e46577dc273 78 return (R)0;
MikamiUitOpen 0:3e46577dc273 79 }
MikamiUitOpen 0:3e46577dc273 80
MikamiUitOpen 0:3e46577dc273 81 /** Get registered static function
MikamiUitOpen 0:3e46577dc273 82 */
MikamiUitOpen 0:3e46577dc273 83 R(*get_function(A1))() {
MikamiUitOpen 0:3e46577dc273 84 return _membercaller ? (R(*)(A1))0 : (R(*)(A1))_p.function;
MikamiUitOpen 0:3e46577dc273 85 }
MikamiUitOpen 0:3e46577dc273 86
MikamiUitOpen 0:3e46577dc273 87 #ifdef MBED_OPERATORS
MikamiUitOpen 0:3e46577dc273 88 R operator ()(A1 a) {
MikamiUitOpen 0:3e46577dc273 89 return call(a);
MikamiUitOpen 0:3e46577dc273 90 }
MikamiUitOpen 0:3e46577dc273 91 operator bool(void) const {
MikamiUitOpen 0:3e46577dc273 92 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
MikamiUitOpen 0:3e46577dc273 93 }
MikamiUitOpen 0:3e46577dc273 94 #endif
MikamiUitOpen 0:3e46577dc273 95 private:
MikamiUitOpen 0:3e46577dc273 96 template<typename T>
MikamiUitOpen 0:3e46577dc273 97 static R membercaller(void *object, uintptr_t *member, A1 a) {
MikamiUitOpen 0:3e46577dc273 98 T* o = static_cast<T*>(object);
MikamiUitOpen 0:3e46577dc273 99 R (T::**m)(A1) = reinterpret_cast<R (T::**)(A1)>(member);
MikamiUitOpen 0:3e46577dc273 100 return (o->**m)(a);
MikamiUitOpen 0:3e46577dc273 101 }
MikamiUitOpen 0:3e46577dc273 102
MikamiUitOpen 0:3e46577dc273 103 union {
MikamiUitOpen 0:3e46577dc273 104 R (*function)(A1); // static function pointer
MikamiUitOpen 0:3e46577dc273 105 void *object; // object this pointer
MikamiUitOpen 0:3e46577dc273 106 } _p;
MikamiUitOpen 0:3e46577dc273 107 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
MikamiUitOpen 0:3e46577dc273 108 R (*_membercaller)(void*, uintptr_t*, A1); // registered membercaller function to convert back and call _m.member on _object
MikamiUitOpen 0:3e46577dc273 109 };
MikamiUitOpen 0:3e46577dc273 110
MikamiUitOpen 0:3e46577dc273 111 /** A class for storing and calling a pointer to a static or member function (R ()(void))
MikamiUitOpen 0:3e46577dc273 112 */
MikamiUitOpen 0:3e46577dc273 113 template <typename R>
MikamiUitOpen 0:3e46577dc273 114 class FunctionPointerArg1<R, void>{
MikamiUitOpen 0:3e46577dc273 115 public:
MikamiUitOpen 0:3e46577dc273 116 /** Create a FunctionPointer, attaching a static function
MikamiUitOpen 0:3e46577dc273 117 *
MikamiUitOpen 0:3e46577dc273 118 * @param function The static function to attach (default is none)
MikamiUitOpen 0:3e46577dc273 119 */
MikamiUitOpen 0:3e46577dc273 120 FunctionPointerArg1(R (*function)(void) = 0) {
MikamiUitOpen 0:3e46577dc273 121 attach(function);
MikamiUitOpen 0:3e46577dc273 122 }
MikamiUitOpen 0:3e46577dc273 123
MikamiUitOpen 0:3e46577dc273 124 /** Create a FunctionPointer, attaching a member function
MikamiUitOpen 0:3e46577dc273 125 *
MikamiUitOpen 0:3e46577dc273 126 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
MikamiUitOpen 0:3e46577dc273 127 * @param function The address of the void member function to attach
MikamiUitOpen 0:3e46577dc273 128 */
MikamiUitOpen 0:3e46577dc273 129 template<typename T>
MikamiUitOpen 0:3e46577dc273 130 FunctionPointerArg1(T *object, R (T::*member)(void)) {
MikamiUitOpen 0:3e46577dc273 131 attach(object, member);
MikamiUitOpen 0:3e46577dc273 132 }
MikamiUitOpen 0:3e46577dc273 133
MikamiUitOpen 0:3e46577dc273 134 /** Attach a static function
MikamiUitOpen 0:3e46577dc273 135 *
MikamiUitOpen 0:3e46577dc273 136 * @param function The void static function to attach (default is none)
MikamiUitOpen 0:3e46577dc273 137 */
MikamiUitOpen 0:3e46577dc273 138 void attach(R (*function)(void)) {
MikamiUitOpen 0:3e46577dc273 139 _p.function = function;
MikamiUitOpen 0:3e46577dc273 140 _membercaller = 0;
MikamiUitOpen 0:3e46577dc273 141 }
MikamiUitOpen 0:3e46577dc273 142
MikamiUitOpen 0:3e46577dc273 143 /** Attach a member function
MikamiUitOpen 0:3e46577dc273 144 *
MikamiUitOpen 0:3e46577dc273 145 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
MikamiUitOpen 0:3e46577dc273 146 * @param function The address of the void member function to attach
MikamiUitOpen 0:3e46577dc273 147 */
MikamiUitOpen 0:3e46577dc273 148 template<typename T>
MikamiUitOpen 0:3e46577dc273 149 void attach(T *object, R (T::*member)(void)) {
MikamiUitOpen 0:3e46577dc273 150 _p.object = static_cast<void*>(object);
MikamiUitOpen 0:3e46577dc273 151 *reinterpret_cast<R (T::**)(void)>(_member) = member;
MikamiUitOpen 0:3e46577dc273 152 _membercaller = &FunctionPointerArg1::membercaller<T>;
MikamiUitOpen 0:3e46577dc273 153 }
MikamiUitOpen 0:3e46577dc273 154
MikamiUitOpen 0:3e46577dc273 155 /** Call the attached static or member function
MikamiUitOpen 0:3e46577dc273 156 */
MikamiUitOpen 0:3e46577dc273 157 R call(){
MikamiUitOpen 0:3e46577dc273 158 if (_membercaller == 0 && _p.function) {
MikamiUitOpen 0:3e46577dc273 159 return _p.function();
MikamiUitOpen 0:3e46577dc273 160 } else if (_membercaller && _p.object) {
MikamiUitOpen 0:3e46577dc273 161 return _membercaller(_p.object, _member);
MikamiUitOpen 0:3e46577dc273 162 }
MikamiUitOpen 0:3e46577dc273 163 return (R)0;
MikamiUitOpen 0:3e46577dc273 164 }
MikamiUitOpen 0:3e46577dc273 165
MikamiUitOpen 0:3e46577dc273 166 /** Get registered static function
MikamiUitOpen 0:3e46577dc273 167 */
MikamiUitOpen 0:3e46577dc273 168 R(*get_function())() {
MikamiUitOpen 0:3e46577dc273 169 return _membercaller ? (R(*)())0 : (R(*)())_p.function;
MikamiUitOpen 0:3e46577dc273 170 }
MikamiUitOpen 0:3e46577dc273 171
MikamiUitOpen 0:3e46577dc273 172 #ifdef MBED_OPERATORS
MikamiUitOpen 0:3e46577dc273 173 R operator ()(void) {
MikamiUitOpen 0:3e46577dc273 174 return call();
MikamiUitOpen 0:3e46577dc273 175 }
MikamiUitOpen 0:3e46577dc273 176 operator bool(void) const {
MikamiUitOpen 0:3e46577dc273 177 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
MikamiUitOpen 0:3e46577dc273 178 }
MikamiUitOpen 0:3e46577dc273 179 #endif
MikamiUitOpen 0:3e46577dc273 180
MikamiUitOpen 0:3e46577dc273 181 private:
MikamiUitOpen 0:3e46577dc273 182 template<typename T>
MikamiUitOpen 0:3e46577dc273 183 static R membercaller(void *object, uintptr_t *member) {
MikamiUitOpen 0:3e46577dc273 184 T* o = static_cast<T*>(object);
MikamiUitOpen 0:3e46577dc273 185 R (T::**m)(void) = reinterpret_cast<R (T::**)(void)>(member);
MikamiUitOpen 0:3e46577dc273 186 return (o->**m)();
MikamiUitOpen 0:3e46577dc273 187 }
MikamiUitOpen 0:3e46577dc273 188
MikamiUitOpen 0:3e46577dc273 189 union {
MikamiUitOpen 0:3e46577dc273 190 R (*function)(void); // static function pointer
MikamiUitOpen 0:3e46577dc273 191 void *object; // object this pointer
MikamiUitOpen 0:3e46577dc273 192 } _p;
MikamiUitOpen 0:3e46577dc273 193 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
MikamiUitOpen 0:3e46577dc273 194 R (*_membercaller)(void*, uintptr_t*); // registered membercaller function to convert back and call _m.member on _object
MikamiUitOpen 0:3e46577dc273 195 };
MikamiUitOpen 0:3e46577dc273 196
MikamiUitOpen 0:3e46577dc273 197 typedef FunctionPointerArg1<void, void> FunctionPointer;
MikamiUitOpen 0:3e46577dc273 198 typedef FunctionPointerArg1<void, int> event_callback_t;
MikamiUitOpen 0:3e46577dc273 199
MikamiUitOpen 0:3e46577dc273 200 } // namespace mbed
MikamiUitOpen 0:3e46577dc273 201
MikamiUitOpen 0:3e46577dc273 202 #endif