Bei Chen Liu / mbed-src

mbed library sources

Fork of mbed-src by mbed official

api/FunctionPointer.h@212:34d62c0b2af6, 2014-05-26 (annotated)

Committer:
mbed_official
Date:
Mon May 26 18:15:07 2014 +0100
Revision:
212:34d62c0b2af6
Parent:
15:4892fe388435
Child:
525:c320967f86b9
Synchronized with git revision f65b7d907785089e8dd942446f1c974b3a213a39



Full URL: https://github.com/mbedmicro/mbed/commit/f65b7d907785089e8dd942446f1c974b3a213a39/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 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>
bogdanm 13:0645d8841f51 20
bogdanm 13:0645d8841f51 21 namespace mbed {
bogdanm 13:0645d8841f51 22
bogdanm 15:4892fe388435 23 typedef void (*pvoidf_t)(void);
bogdanm 15:4892fe388435 24
bogdanm 13:0645d8841f51 25 /** A class for storing and calling a pointer to a static or member void function
bogdanm 13:0645d8841f51 26 */
bogdanm 13:0645d8841f51 27 class FunctionPointer {
bogdanm 13:0645d8841f51 28 public:
bogdanm 13:0645d8841f51 29
bogdanm 13:0645d8841f51 30 /** Create a FunctionPointer, attaching a static function
bogdanm 13:0645d8841f51 31 *
bogdanm 13:0645d8841f51 32 * @param function The void static function to attach (default is none)
bogdanm 13:0645d8841f51 33 */
bogdanm 13:0645d8841f51 34 FunctionPointer(void (*function)(void) = 0);
bogdanm 13:0645d8841f51 35
bogdanm 13:0645d8841f51 36 /** Create a FunctionPointer, attaching a member function
bogdanm 13:0645d8841f51 37 *
bogdanm 13:0645d8841f51 38 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 13:0645d8841f51 39 * @param function The address of the void member function to attach
bogdanm 13:0645d8841f51 40 */
bogdanm 13:0645d8841f51 41 template<typename T>
bogdanm 13:0645d8841f51 42 FunctionPointer(T *object, void (T::*member)(void)) {
bogdanm 13:0645d8841f51 43 attach(object, member);
bogdanm 13:0645d8841f51 44 }
bogdanm 13:0645d8841f51 45
bogdanm 13:0645d8841f51 46 /** Attach a static function
bogdanm 13:0645d8841f51 47 *
bogdanm 13:0645d8841f51 48 * @param function The void static function to attach (default is none)
bogdanm 13:0645d8841f51 49 */
bogdanm 13:0645d8841f51 50 void attach(void (*function)(void) = 0);
bogdanm 13:0645d8841f51 51
bogdanm 13:0645d8841f51 52 /** Attach a member function
bogdanm 13:0645d8841f51 53 *
bogdanm 13:0645d8841f51 54 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 13:0645d8841f51 55 * @param function The address of the void member function to attach
bogdanm 13:0645d8841f51 56 */
bogdanm 13:0645d8841f51 57 template<typename T>
bogdanm 13:0645d8841f51 58 void attach(T *object, void (T::*member)(void)) {
bogdanm 13:0645d8841f51 59 _object = static_cast<void*>(object);
bogdanm 13:0645d8841f51 60 memcpy(_member, (char*)&member, sizeof(member));
bogdanm 13:0645d8841f51 61 _membercaller = &FunctionPointer::membercaller<T>;
bogdanm 13:0645d8841f51 62 _function = 0;
bogdanm 13:0645d8841f51 63 }
bogdanm 13:0645d8841f51 64
bogdanm 13:0645d8841f51 65 /** Call the attached static or member function
bogdanm 13:0645d8841f51 66 */
bogdanm 13:0645d8841f51 67 void call();
bogdanm 13:0645d8841f51 68
bogdanm 15:4892fe388435 69 pvoidf_t get_function() const {
bogdanm 15:4892fe388435 70 return (pvoidf_t)_function;
bogdanm 15:4892fe388435 71 }
bogdanm 15:4892fe388435 72
bogdanm 15:4892fe388435 73 #ifdef MBED_OPERATORS
bogdanm 15:4892fe388435 74 void operator ()(void);
bogdanm 15:4892fe388435 75 #endif
bogdanm 15:4892fe388435 76
bogdanm 13:0645d8841f51 77 private:
bogdanm 13:0645d8841f51 78 template<typename T>
bogdanm 13:0645d8841f51 79 static void membercaller(void *object, char *member) {
bogdanm 13:0645d8841f51 80 T* o = static_cast<T*>(object);
bogdanm 13:0645d8841f51 81 void (T::*m)(void);
bogdanm 13:0645d8841f51 82 memcpy((char*)&m, member, sizeof(m));
bogdanm 13:0645d8841f51 83 (o->*m)();
bogdanm 13:0645d8841f51 84 }
bogdanm 13:0645d8841f51 85
mbed_official 212:34d62c0b2af6 86 void (*_function)(void); // static function pointer - 0 if none attached
mbed_official 212:34d62c0b2af6 87 void *_object; // object this pointer - 0 if none attached
mbed_official 212:34d62c0b2af6 88 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
mbed_official 212:34d62c0b2af6 89 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
bogdanm 13:0645d8841f51 90 };
bogdanm 13:0645d8841f51 91
bogdanm 13:0645d8841f51 92 } // namespace mbed
bogdanm 13:0645d8841f51 93
bogdanm 13:0645d8841f51 94 #endif