Aravind Vadali / mbed-src-AV

mbed.h library with any bug fixes AV finds.

Dependents:   micromouse4_encoder_testing PID_Test Lab1_Test WorkingPID ... more

api/FunctionPointer.h@0:ba7650f404af, 2015-11-02 (annotated)

Committer:
aravindsv
Date:
Mon Nov 02 02:26:59 2015 +0000
Revision:
0:ba7650f404af
Reduced HSE_STARTUP_TIMEOUT to 500 ms, fixed some compiler warnings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aravindsv 0:ba7650f404af 1 /* mbed Microcontroller Library
aravindsv 0:ba7650f404af 2 * Copyright (c) 2006-2015 ARM Limited
aravindsv 0:ba7650f404af 3 *
aravindsv 0:ba7650f404af 4 * Licensed under the Apache License, Version 2.0 (the "License");
aravindsv 0:ba7650f404af 5 * you may not use this file except in compliance with the License.
aravindsv 0:ba7650f404af 6 * You may obtain a copy of the License at
aravindsv 0:ba7650f404af 7 *
aravindsv 0:ba7650f404af 8 * http://www.apache.org/licenses/LICENSE-2.0
aravindsv 0:ba7650f404af 9 *
aravindsv 0:ba7650f404af 10 * Unless required by applicable law or agreed to in writing, software
aravindsv 0:ba7650f404af 11 * distributed under the License is distributed on an "AS IS" BASIS,
aravindsv 0:ba7650f404af 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
aravindsv 0:ba7650f404af 13 * See the License for the specific language governing permissions and
aravindsv 0:ba7650f404af 14 * limitations under the License.
aravindsv 0:ba7650f404af 15 */
aravindsv 0:ba7650f404af 16 #ifndef MBED_FUNCTIONPOINTER_H
aravindsv 0:ba7650f404af 17 #define MBED_FUNCTIONPOINTER_H
aravindsv 0:ba7650f404af 18
aravindsv 0:ba7650f404af 19 #include <string.h>
aravindsv 0:ba7650f404af 20 #include <stdint.h>
aravindsv 0:ba7650f404af 21
aravindsv 0:ba7650f404af 22 namespace mbed {
aravindsv 0:ba7650f404af 23
aravindsv 0:ba7650f404af 24 /* If we had variaditic templates, this wouldn't be a problem, but until C++11 is enabled, we are stuck with multiple classes... */
aravindsv 0:ba7650f404af 25
aravindsv 0:ba7650f404af 26 /** A class for storing and calling a pointer to a static or member function
aravindsv 0:ba7650f404af 27 */
aravindsv 0:ba7650f404af 28 template <typename R, typename A1>
aravindsv 0:ba7650f404af 29 class FunctionPointerArg1{
aravindsv 0:ba7650f404af 30 public:
aravindsv 0:ba7650f404af 31 /** Create a FunctionPointer, attaching a static function
aravindsv 0:ba7650f404af 32 *
aravindsv 0:ba7650f404af 33 * @param function The static function to attach (default is none)
aravindsv 0:ba7650f404af 34 */
aravindsv 0:ba7650f404af 35 FunctionPointerArg1(R (*function)(A1) = 0) {
aravindsv 0:ba7650f404af 36 attach(function);
aravindsv 0:ba7650f404af 37 }
aravindsv 0:ba7650f404af 38
aravindsv 0:ba7650f404af 39 /** Create a FunctionPointer, attaching a member function
aravindsv 0:ba7650f404af 40 *
aravindsv 0:ba7650f404af 41 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
aravindsv 0:ba7650f404af 42 * @param function The address of the member function to attach
aravindsv 0:ba7650f404af 43 */
aravindsv 0:ba7650f404af 44 template<typename T>
aravindsv 0:ba7650f404af 45 FunctionPointerArg1(T *object, R (T::*member)(A1)) {
aravindsv 0:ba7650f404af 46 attach(object, member);
aravindsv 0:ba7650f404af 47 }
aravindsv 0:ba7650f404af 48
aravindsv 0:ba7650f404af 49 /** Attach a static function
aravindsv 0:ba7650f404af 50 *
aravindsv 0:ba7650f404af 51 * @param function The static function to attach (default is none)
aravindsv 0:ba7650f404af 52 */
aravindsv 0:ba7650f404af 53 void attach(R (*function)(A1)) {
aravindsv 0:ba7650f404af 54 _p.function = function;
aravindsv 0:ba7650f404af 55 _membercaller = 0;
aravindsv 0:ba7650f404af 56 }
aravindsv 0:ba7650f404af 57
aravindsv 0:ba7650f404af 58 /** Attach a member function
aravindsv 0:ba7650f404af 59 *
aravindsv 0:ba7650f404af 60 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
aravindsv 0:ba7650f404af 61 * @param function The address of the member function to attach
aravindsv 0:ba7650f404af 62 */
aravindsv 0:ba7650f404af 63 template<typename T>
aravindsv 0:ba7650f404af 64 void attach(T *object, R (T::*member)(A1)) {
aravindsv 0:ba7650f404af 65 _p.object = static_cast<void*>(object);
aravindsv 0:ba7650f404af 66 *reinterpret_cast<R (T::**)(A1)>(_member) = member;
aravindsv 0:ba7650f404af 67 _membercaller = &FunctionPointerArg1::membercaller<T>;
aravindsv 0:ba7650f404af 68 }
aravindsv 0:ba7650f404af 69
aravindsv 0:ba7650f404af 70 /** Call the attached static or member function
aravindsv 0:ba7650f404af 71 */
aravindsv 0:ba7650f404af 72 R call(A1 a) {
aravindsv 0:ba7650f404af 73 if (_membercaller == 0 && _p.function) {
aravindsv 0:ba7650f404af 74 return _p.function(a);
aravindsv 0:ba7650f404af 75 } else if (_membercaller && _p.object) {
aravindsv 0:ba7650f404af 76 return _membercaller(_p.object, _member, a);
aravindsv 0:ba7650f404af 77 }
aravindsv 0:ba7650f404af 78 return (R)0;
aravindsv 0:ba7650f404af 79 }
aravindsv 0:ba7650f404af 80
aravindsv 0:ba7650f404af 81 /** Get registered static function
aravindsv 0:ba7650f404af 82 */
aravindsv 0:ba7650f404af 83 R(*get_function(A1))() {
aravindsv 0:ba7650f404af 84 return _membercaller ? (R(*)(A1))0 : (R(*)(A1))_p.function;
aravindsv 0:ba7650f404af 85 }
aravindsv 0:ba7650f404af 86
aravindsv 0:ba7650f404af 87 #ifdef MBED_OPERATORS
aravindsv 0:ba7650f404af 88 R operator ()(A1 a) {
aravindsv 0:ba7650f404af 89 return call(a);
aravindsv 0:ba7650f404af 90 }
aravindsv 0:ba7650f404af 91 operator bool(void) const {
aravindsv 0:ba7650f404af 92 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
aravindsv 0:ba7650f404af 93 }
aravindsv 0:ba7650f404af 94 #endif
aravindsv 0:ba7650f404af 95 private:
aravindsv 0:ba7650f404af 96 template<typename T>
aravindsv 0:ba7650f404af 97 static R membercaller(void *object, uintptr_t *member, A1 a) {
aravindsv 0:ba7650f404af 98 T* o = static_cast<T*>(object);
aravindsv 0:ba7650f404af 99 R (T::**m)(A1) = reinterpret_cast<R (T::**)(A1)>(member);
aravindsv 0:ba7650f404af 100 return (o->**m)(a);
aravindsv 0:ba7650f404af 101 }
aravindsv 0:ba7650f404af 102
aravindsv 0:ba7650f404af 103 union {
aravindsv 0:ba7650f404af 104 R (*function)(A1); // static function pointer
aravindsv 0:ba7650f404af 105 void *object; // object this pointer
aravindsv 0:ba7650f404af 106 } _p;
aravindsv 0:ba7650f404af 107 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
aravindsv 0:ba7650f404af 108 R (*_membercaller)(void*, uintptr_t*, A1); // registered membercaller function to convert back and call _m.member on _object
aravindsv 0:ba7650f404af 109 };
aravindsv 0:ba7650f404af 110
aravindsv 0:ba7650f404af 111 /** A class for storing and calling a pointer to a static or member function (R ()(void))
aravindsv 0:ba7650f404af 112 */
aravindsv 0:ba7650f404af 113 template <typename R>
aravindsv 0:ba7650f404af 114 class FunctionPointerArg1<R, void>{
aravindsv 0:ba7650f404af 115 public:
aravindsv 0:ba7650f404af 116 /** Create a FunctionPointer, attaching a static function
aravindsv 0:ba7650f404af 117 *
aravindsv 0:ba7650f404af 118 * @param function The static function to attach (default is none)
aravindsv 0:ba7650f404af 119 */
aravindsv 0:ba7650f404af 120 FunctionPointerArg1(R (*function)(void) = 0) {
aravindsv 0:ba7650f404af 121 attach(function);
aravindsv 0:ba7650f404af 122 }
aravindsv 0:ba7650f404af 123
aravindsv 0:ba7650f404af 124 /** Create a FunctionPointer, attaching a member function
aravindsv 0:ba7650f404af 125 *
aravindsv 0:ba7650f404af 126 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
aravindsv 0:ba7650f404af 127 * @param function The address of the void member function to attach
aravindsv 0:ba7650f404af 128 */
aravindsv 0:ba7650f404af 129 template<typename T>
aravindsv 0:ba7650f404af 130 FunctionPointerArg1(T *object, R (T::*member)(void)) {
aravindsv 0:ba7650f404af 131 attach(object, member);
aravindsv 0:ba7650f404af 132 }
aravindsv 0:ba7650f404af 133
aravindsv 0:ba7650f404af 134 /** Attach a static function
aravindsv 0:ba7650f404af 135 *
aravindsv 0:ba7650f404af 136 * @param function The void static function to attach (default is none)
aravindsv 0:ba7650f404af 137 */
aravindsv 0:ba7650f404af 138 void attach(R (*function)(void)) {
aravindsv 0:ba7650f404af 139 _p.function = function;
aravindsv 0:ba7650f404af 140 _membercaller = 0;
aravindsv 0:ba7650f404af 141 }
aravindsv 0:ba7650f404af 142
aravindsv 0:ba7650f404af 143 /** Attach a member function
aravindsv 0:ba7650f404af 144 *
aravindsv 0:ba7650f404af 145 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
aravindsv 0:ba7650f404af 146 * @param function The address of the void member function to attach
aravindsv 0:ba7650f404af 147 */
aravindsv 0:ba7650f404af 148 template<typename T>
aravindsv 0:ba7650f404af 149 void attach(T *object, R (T::*member)(void)) {
aravindsv 0:ba7650f404af 150 _p.object = static_cast<void*>(object);
aravindsv 0:ba7650f404af 151 *reinterpret_cast<R (T::**)(void)>(_member) = member;
aravindsv 0:ba7650f404af 152 _membercaller = &FunctionPointerArg1::membercaller<T>;
aravindsv 0:ba7650f404af 153 }
aravindsv 0:ba7650f404af 154
aravindsv 0:ba7650f404af 155 /** Call the attached static or member function
aravindsv 0:ba7650f404af 156 */
aravindsv 0:ba7650f404af 157 R call(){
aravindsv 0:ba7650f404af 158 if (_membercaller == 0 && _p.function) {
aravindsv 0:ba7650f404af 159 return _p.function();
aravindsv 0:ba7650f404af 160 } else if (_membercaller && _p.object) {
aravindsv 0:ba7650f404af 161 return _membercaller(_p.object, _member);
aravindsv 0:ba7650f404af 162 }
aravindsv 0:ba7650f404af 163 return (R)0;
aravindsv 0:ba7650f404af 164 }
aravindsv 0:ba7650f404af 165
aravindsv 0:ba7650f404af 166 /** Get registered static function
aravindsv 0:ba7650f404af 167 */
aravindsv 0:ba7650f404af 168 R(*get_function())() {
aravindsv 0:ba7650f404af 169 return _membercaller ? (R(*)())0 : (R(*)())_p.function;
aravindsv 0:ba7650f404af 170 }
aravindsv 0:ba7650f404af 171
aravindsv 0:ba7650f404af 172 #ifdef MBED_OPERATORS
aravindsv 0:ba7650f404af 173 R operator ()(void) {
aravindsv 0:ba7650f404af 174 return call();
aravindsv 0:ba7650f404af 175 }
aravindsv 0:ba7650f404af 176 operator bool(void) const {
aravindsv 0:ba7650f404af 177 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
aravindsv 0:ba7650f404af 178 }
aravindsv 0:ba7650f404af 179 #endif
aravindsv 0:ba7650f404af 180
aravindsv 0:ba7650f404af 181 private:
aravindsv 0:ba7650f404af 182 template<typename T>
aravindsv 0:ba7650f404af 183 static R membercaller(void *object, uintptr_t *member) {
aravindsv 0:ba7650f404af 184 T* o = static_cast<T*>(object);
aravindsv 0:ba7650f404af 185 R (T::**m)(void) = reinterpret_cast<R (T::**)(void)>(member);
aravindsv 0:ba7650f404af 186 return (o->**m)();
aravindsv 0:ba7650f404af 187 }
aravindsv 0:ba7650f404af 188
aravindsv 0:ba7650f404af 189 union {
aravindsv 0:ba7650f404af 190 R (*function)(void); // static function pointer
aravindsv 0:ba7650f404af 191 void *object; // object this pointer
aravindsv 0:ba7650f404af 192 } _p;
aravindsv 0:ba7650f404af 193 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
aravindsv 0:ba7650f404af 194 R (*_membercaller)(void*, uintptr_t*); // registered membercaller function to convert back and call _m.member on _object
aravindsv 0:ba7650f404af 195 };
aravindsv 0:ba7650f404af 196
aravindsv 0:ba7650f404af 197 typedef FunctionPointerArg1<void, void> FunctionPointer;
aravindsv 0:ba7650f404af 198 typedef FunctionPointerArg1<void, int> event_callback_t;
aravindsv 0:ba7650f404af 199
aravindsv 0:ba7650f404af 200 } // namespace mbed
aravindsv 0:ba7650f404af 201
aravindsv 0:ba7650f404af 202 #endif