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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

api/FunctionPointer.h@525:c320967f86b9, 2015-04-28 (annotated)

Committer:
mbed_official
Date:
Tue Apr 28 11:45:12 2015 +0100
Revision:
525:c320967f86b9
Parent:
212:34d62c0b2af6 
Synchronized with git revision 299385b8331142b9dc524da7a986536f60b14553



Full URL: https://github.com/mbedmicro/mbed/commit/299385b8331142b9dc524da7a986536f60b14553/



Add in Silicon Labs targets with asynchronous API support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
mbed_official 525:c320967f86b9 2 * Copyright (c) 2006-2015 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #ifndef MBED_FUNCTIONPOINTER_H
bogdanm 13:0645d8841f51 17 #define MBED_FUNCTIONPOINTER_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include <string.h>
mbed_official 525:c320967f86b9 20 #include <stdint.h>
bogdanm 13:0645d8841f51 21
bogdanm 13:0645d8841f51 22 namespace mbed {
bogdanm 13:0645d8841f51 23
mbed_official 525:c320967f86b9 24 /* If we had variaditic templates, this wouldn't be a problem, but until C++11 is enabled, we are stuck with multiple classes... */
bogdanm 15:4892fe388435 25
mbed_official 525:c320967f86b9 26 /** A class for storing and calling a pointer to a static or member function
bogdanm 13:0645d8841f51 27 */
mbed_official 525:c320967f86b9 28 template <typename R, typename A1>
mbed_official 525:c320967f86b9 29 class FunctionPointerArg1{
bogdanm 13:0645d8841f51 30 public:
bogdanm 13:0645d8841f51 31 /** Create a FunctionPointer, attaching a static function
bogdanm 13:0645d8841f51 32 *
mbed_official 525:c320967f86b9 33 * @param function The static function to attach (default is none)
mbed_official 525:c320967f86b9 34 */
mbed_official 525:c320967f86b9 35 FunctionPointerArg1(R (*function)(A1) = 0) {
mbed_official 525:c320967f86b9 36 attach(function);
mbed_official 525:c320967f86b9 37 }
mbed_official 525:c320967f86b9 38
mbed_official 525:c320967f86b9 39 /** Create a FunctionPointer, attaching a member function
mbed_official 525:c320967f86b9 40 *
mbed_official 525:c320967f86b9 41 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
mbed_official 525:c320967f86b9 42 * @param function The address of the member function to attach
mbed_official 525:c320967f86b9 43 */
mbed_official 525:c320967f86b9 44 template<typename T>
mbed_official 525:c320967f86b9 45 FunctionPointerArg1(T *object, R (T::*member)(A1)) {
mbed_official 525:c320967f86b9 46 attach(object, member);
mbed_official 525:c320967f86b9 47 }
mbed_official 525:c320967f86b9 48
mbed_official 525:c320967f86b9 49 /** Attach a static function
mbed_official 525:c320967f86b9 50 *
mbed_official 525:c320967f86b9 51 * @param function The static function to attach (default is none)
mbed_official 525:c320967f86b9 52 */
mbed_official 525:c320967f86b9 53 void attach(R (*function)(A1)) {
mbed_official 525:c320967f86b9 54 _p.function = function;
mbed_official 525:c320967f86b9 55 _membercaller = 0;
mbed_official 525:c320967f86b9 56 }
mbed_official 525:c320967f86b9 57
mbed_official 525:c320967f86b9 58 /** Attach a member function
mbed_official 525:c320967f86b9 59 *
mbed_official 525:c320967f86b9 60 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
mbed_official 525:c320967f86b9 61 * @param function The address of the member function to attach
mbed_official 525:c320967f86b9 62 */
mbed_official 525:c320967f86b9 63 template<typename T>
mbed_official 525:c320967f86b9 64 void attach(T *object, R (T::*member)(A1)) {
mbed_official 525:c320967f86b9 65 _p.object = static_cast<void*>(object);
mbed_official 525:c320967f86b9 66 *reinterpret_cast<R (T::**)(A1)>(_member) = member;
mbed_official 525:c320967f86b9 67 _membercaller = &FunctionPointerArg1::membercaller<T>;
mbed_official 525:c320967f86b9 68 }
mbed_official 525:c320967f86b9 69
mbed_official 525:c320967f86b9 70 /** Call the attached static or member function
bogdanm 13:0645d8841f51 71 */
mbed_official 525:c320967f86b9 72 R call(A1 a) {
mbed_official 525:c320967f86b9 73 if (_membercaller == 0 && _p.function) {
mbed_official 525:c320967f86b9 74 return _p.function(a);
mbed_official 525:c320967f86b9 75 } else if (_membercaller && _p.object) {
mbed_official 525:c320967f86b9 76 return _membercaller(_p.object, _member, a);
mbed_official 525:c320967f86b9 77 }
mbed_official 525:c320967f86b9 78 return (R)0;
mbed_official 525:c320967f86b9 79 }
mbed_official 525:c320967f86b9 80
mbed_official 525:c320967f86b9 81 /** Get registered static function
mbed_official 525:c320967f86b9 82 */
mbed_official 525:c320967f86b9 83 R(*get_function(A1))() {
mbed_official 525:c320967f86b9 84 return _membercaller ? (R(*)(A1))0 : (R(*)(A1))_p.function;
mbed_official 525:c320967f86b9 85 }
mbed_official 525:c320967f86b9 86
mbed_official 525:c320967f86b9 87 #ifdef MBED_OPERATORS
mbed_official 525:c320967f86b9 88 R operator ()(A1 a) {
mbed_official 525:c320967f86b9 89 return call(a);
mbed_official 525:c320967f86b9 90 }
mbed_official 525:c320967f86b9 91 operator bool(void) const {
mbed_official 525:c320967f86b9 92 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
mbed_official 525:c320967f86b9 93 }
mbed_official 525:c320967f86b9 94 #endif
mbed_official 525:c320967f86b9 95 private:
mbed_official 525:c320967f86b9 96 template<typename T>
mbed_official 525:c320967f86b9 97 static R membercaller(void *object, uintptr_t *member, A1 a) {
mbed_official 525:c320967f86b9 98 T* o = static_cast<T*>(object);
mbed_official 525:c320967f86b9 99 R (T::**m)(A1) = reinterpret_cast<R (T::**)(A1)>(member);
mbed_official 525:c320967f86b9 100 return (o->**m)(a);
mbed_official 525:c320967f86b9 101 }
mbed_official 525:c320967f86b9 102
mbed_official 525:c320967f86b9 103 union {
mbed_official 525:c320967f86b9 104 R (*function)(A1); // static function pointer
mbed_official 525:c320967f86b9 105 void *object; // object this pointer
mbed_official 525:c320967f86b9 106 } _p;
mbed_official 525:c320967f86b9 107 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
mbed_official 525:c320967f86b9 108 R (*_membercaller)(void*, uintptr_t*, A1); // registered membercaller function to convert back and call _m.member on _object
mbed_official 525:c320967f86b9 109 };
mbed_official 525:c320967f86b9 110
mbed_official 525:c320967f86b9 111 /** A class for storing and calling a pointer to a static or member function (R ()(void))
mbed_official 525:c320967f86b9 112 */
mbed_official 525:c320967f86b9 113 template <typename R>
mbed_official 525:c320967f86b9 114 class FunctionPointerArg1<R, void>{
mbed_official 525:c320967f86b9 115 public:
mbed_official 525:c320967f86b9 116 /** Create a FunctionPointer, attaching a static function
mbed_official 525:c320967f86b9 117 *
mbed_official 525:c320967f86b9 118 * @param function The static function to attach (default is none)
mbed_official 525:c320967f86b9 119 */
mbed_official 525:c320967f86b9 120 FunctionPointerArg1(R (*function)(void) = 0) {
mbed_official 525:c320967f86b9 121 attach(function);
mbed_official 525:c320967f86b9 122 }
bogdanm 13:0645d8841f51 123
bogdanm 13:0645d8841f51 124 /** Create a FunctionPointer, attaching a member function
bogdanm 13:0645d8841f51 125 *
bogdanm 13:0645d8841f51 126 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 13:0645d8841f51 127 * @param function The address of the void member function to attach
bogdanm 13:0645d8841f51 128 */
bogdanm 13:0645d8841f51 129 template<typename T>
mbed_official 525:c320967f86b9 130 FunctionPointerArg1(T *object, R (T::*member)(void)) {
bogdanm 13:0645d8841f51 131 attach(object, member);
bogdanm 13:0645d8841f51 132 }
bogdanm 13:0645d8841f51 133
bogdanm 13:0645d8841f51 134 /** Attach a static function
bogdanm 13:0645d8841f51 135 *
bogdanm 13:0645d8841f51 136 * @param function The void static function to attach (default is none)
bogdanm 13:0645d8841f51 137 */
mbed_official 525:c320967f86b9 138 void attach(R (*function)(void)) {
mbed_official 525:c320967f86b9 139 _p.function = function;
mbed_official 525:c320967f86b9 140 _membercaller = 0;
mbed_official 525:c320967f86b9 141 }
bogdanm 13:0645d8841f51 142
bogdanm 13:0645d8841f51 143 /** Attach a member function
bogdanm 13:0645d8841f51 144 *
bogdanm 13:0645d8841f51 145 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 13:0645d8841f51 146 * @param function The address of the void member function to attach
bogdanm 13:0645d8841f51 147 */
bogdanm 13:0645d8841f51 148 template<typename T>
mbed_official 525:c320967f86b9 149 void attach(T *object, R (T::*member)(void)) {
mbed_official 525:c320967f86b9 150 _p.object = static_cast<void*>(object);
mbed_official 525:c320967f86b9 151 *reinterpret_cast<R (T::**)(void)>(_member) = member;
mbed_official 525:c320967f86b9 152 _membercaller = &FunctionPointerArg1::membercaller<T>;
bogdanm 13:0645d8841f51 153 }
bogdanm 13:0645d8841f51 154
bogdanm 13:0645d8841f51 155 /** Call the attached static or member function
bogdanm 13:0645d8841f51 156 */
mbed_official 525:c320967f86b9 157 R call(){
mbed_official 525:c320967f86b9 158 if (_membercaller == 0 && _p.function) {
mbed_official 525:c320967f86b9 159 return _p.function();
mbed_official 525:c320967f86b9 160 } else if (_membercaller && _p.object) {
mbed_official 525:c320967f86b9 161 return _membercaller(_p.object, _member);
mbed_official 525:c320967f86b9 162 }
mbed_official 525:c320967f86b9 163 return (R)0;
mbed_official 525:c320967f86b9 164 }
bogdanm 13:0645d8841f51 165
mbed_official 525:c320967f86b9 166 /** Get registered static function
mbed_official 525:c320967f86b9 167 */
mbed_official 525:c320967f86b9 168 R(*get_function())() {
mbed_official 525:c320967f86b9 169 return _membercaller ? (R(*)())0 : (R(*)())_p.function;
bogdanm 15:4892fe388435 170 }
bogdanm 15:4892fe388435 171
bogdanm 15:4892fe388435 172 #ifdef MBED_OPERATORS
mbed_official 525:c320967f86b9 173 R operator ()(void) {
mbed_official 525:c320967f86b9 174 return call();
mbed_official 525:c320967f86b9 175 }
mbed_official 525:c320967f86b9 176 operator bool(void) const {
mbed_official 525:c320967f86b9 177 return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
mbed_official 525:c320967f86b9 178 }
bogdanm 15:4892fe388435 179 #endif
bogdanm 15:4892fe388435 180
bogdanm 13:0645d8841f51 181 private:
bogdanm 13:0645d8841f51 182 template<typename T>
mbed_official 525:c320967f86b9 183 static R membercaller(void *object, uintptr_t *member) {
bogdanm 13:0645d8841f51 184 T* o = static_cast<T*>(object);
mbed_official 525:c320967f86b9 185 R (T::**m)(void) = reinterpret_cast<R (T::**)(void)>(member);
mbed_official 525:c320967f86b9 186 return (o->**m)();
bogdanm 13:0645d8841f51 187 }
bogdanm 13:0645d8841f51 188
mbed_official 525:c320967f86b9 189 union {
mbed_official 525:c320967f86b9 190 R (*function)(void); // static function pointer
mbed_official 525:c320967f86b9 191 void *object; // object this pointer
mbed_official 525:c320967f86b9 192 } _p;
mbed_official 525:c320967f86b9 193 uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
mbed_official 525:c320967f86b9 194 R (*_membercaller)(void*, uintptr_t*); // registered membercaller function to convert back and call _m.member on _object
bogdanm 13:0645d8841f51 195 };
bogdanm 13:0645d8841f51 196
mbed_official 525:c320967f86b9 197 typedef FunctionPointerArg1<void, void> FunctionPointer;
mbed_official 525:c320967f86b9 198 typedef FunctionPointerArg1<void, int> event_callback_t;
mbed_official 525:c320967f86b9 199
bogdanm 13:0645d8841f51 200 } // namespace mbed
bogdanm 13:0645d8841f51 201
bogdanm 13:0645d8841f51 202 #endif