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

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mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

FunctionPointer.h@65:5798e58a58b1, 2013-08-12 (annotated)

Committer:
bogdanm
Date:
Mon Aug 12 13:17:46 2013 +0300
Revision:
65:5798e58a58b1
Parent:
59:0883845fe643
Child:
85:024bf7f99721
New target (LPC4088), new features (interrupt chaining), bug fixes (KL25Z I2C).

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 65:5798e58a58b1 1 /* mbed Microcontroller Library
bogdanm 65:5798e58a58b1 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 65:5798e58a58b1 3 *
bogdanm 65:5798e58a58b1 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 65:5798e58a58b1 5 * you may not use this file except in compliance with the License.
bogdanm 65:5798e58a58b1 6 * You may obtain a copy of the License at
bogdanm 65:5798e58a58b1 7 *
bogdanm 65:5798e58a58b1 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 65:5798e58a58b1 9 *
bogdanm 65:5798e58a58b1 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 65:5798e58a58b1 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 65:5798e58a58b1 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 65:5798e58a58b1 13 * See the License for the specific language governing permissions and
bogdanm 65:5798e58a58b1 14 * limitations under the License.
bogdanm 65:5798e58a58b1 15 */
bogdanm 65:5798e58a58b1 16 #ifndef MBED_FUNCTIONPOINTER_H
bogdanm 65:5798e58a58b1 17 #define MBED_FUNCTIONPOINTER_H
bogdanm 65:5798e58a58b1 18
bogdanm 65:5798e58a58b1 19 #include <string.h>
bogdanm 65:5798e58a58b1 20
bogdanm 65:5798e58a58b1 21 namespace mbed {
bogdanm 65:5798e58a58b1 22
bogdanm 65:5798e58a58b1 23 typedef void (*pvoidf_t)(void);
bogdanm 65:5798e58a58b1 24
bogdanm 65:5798e58a58b1 25 /** A class for storing and calling a pointer to a static or member void function
bogdanm 65:5798e58a58b1 26 */
bogdanm 65:5798e58a58b1 27 class FunctionPointer {
bogdanm 65:5798e58a58b1 28 public:
bogdanm 65:5798e58a58b1 29
bogdanm 65:5798e58a58b1 30 /** Create a FunctionPointer, attaching a static function
bogdanm 65:5798e58a58b1 31 *
bogdanm 65:5798e58a58b1 32 * @param function The void static function to attach (default is none)
bogdanm 65:5798e58a58b1 33 */
bogdanm 65:5798e58a58b1 34 FunctionPointer(void (*function)(void) = 0);
bogdanm 65:5798e58a58b1 35
bogdanm 65:5798e58a58b1 36 /** Create a FunctionPointer, attaching a member function
bogdanm 65:5798e58a58b1 37 *
bogdanm 65:5798e58a58b1 38 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 65:5798e58a58b1 39 * @param function The address of the void member function to attach
bogdanm 65:5798e58a58b1 40 */
bogdanm 65:5798e58a58b1 41 template<typename T>
bogdanm 65:5798e58a58b1 42 FunctionPointer(T *object, void (T::*member)(void)) {
bogdanm 65:5798e58a58b1 43 attach(object, member);
bogdanm 65:5798e58a58b1 44 }
bogdanm 65:5798e58a58b1 45
bogdanm 65:5798e58a58b1 46 /** Attach a static function
bogdanm 65:5798e58a58b1 47 *
bogdanm 65:5798e58a58b1 48 * @param function The void static function to attach (default is none)
bogdanm 65:5798e58a58b1 49 */
bogdanm 65:5798e58a58b1 50 void attach(void (*function)(void) = 0);
bogdanm 65:5798e58a58b1 51
bogdanm 65:5798e58a58b1 52 /** Attach a member function
bogdanm 65:5798e58a58b1 53 *
bogdanm 65:5798e58a58b1 54 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 65:5798e58a58b1 55 * @param function The address of the void member function to attach
bogdanm 65:5798e58a58b1 56 */
bogdanm 65:5798e58a58b1 57 template<typename T>
bogdanm 65:5798e58a58b1 58 void attach(T *object, void (T::*member)(void)) {
bogdanm 65:5798e58a58b1 59 _object = static_cast<void*>(object);
bogdanm 65:5798e58a58b1 60 memcpy(_member, (char*)&member, sizeof(member));
bogdanm 65:5798e58a58b1 61 _membercaller = &FunctionPointer::membercaller<T>;
bogdanm 65:5798e58a58b1 62 _function = 0;
bogdanm 65:5798e58a58b1 63 }
bogdanm 65:5798e58a58b1 64
bogdanm 65:5798e58a58b1 65 /** Call the attached static or member function
bogdanm 65:5798e58a58b1 66 */
bogdanm 65:5798e58a58b1 67 void call();
bogdanm 65:5798e58a58b1 68
bogdanm 65:5798e58a58b1 69 pvoidf_t get_function() const {
bogdanm 65:5798e58a58b1 70 return (pvoidf_t)_function;
bogdanm 65:5798e58a58b1 71 }
bogdanm 65:5798e58a58b1 72
bogdanm 65:5798e58a58b1 73 #ifdef MBED_OPERATORS
bogdanm 65:5798e58a58b1 74 void operator ()(void);
bogdanm 65:5798e58a58b1 75 #endif
bogdanm 65:5798e58a58b1 76
bogdanm 65:5798e58a58b1 77 private:
bogdanm 65:5798e58a58b1 78 template<typename T>
bogdanm 65:5798e58a58b1 79 static void membercaller(void *object, char *member) {
bogdanm 65:5798e58a58b1 80 T* o = static_cast<T*>(object);
bogdanm 65:5798e58a58b1 81 void (T::*m)(void);
bogdanm 65:5798e58a58b1 82 memcpy((char*)&m, member, sizeof(m));
bogdanm 65:5798e58a58b1 83 (o->*m)();
bogdanm 65:5798e58a58b1 84 }
bogdanm 65:5798e58a58b1 85
bogdanm 65:5798e58a58b1 86 void (*_function)(void); // static function pointer - 0 if none attached
bogdanm 65:5798e58a58b1 87 void *_object; // object this pointer - 0 if none attached
bogdanm 65:5798e58a58b1 88 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
bogdanm 65:5798e58a58b1 89 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
bogdanm 65:5798e58a58b1 90 };
bogdanm 65:5798e58a58b1 91
bogdanm 65:5798e58a58b1 92 } // namespace mbed
bogdanm 65:5798e58a58b1 93
bogdanm 65:5798e58a58b1 94 #endif