zain aftab / mbed-src3

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Dependents:   RPC_Serial_V_mac

cpp/FunctionPointer.h@0:fd0d7bdfcdc2, 2012-11-20 (annotated)

Committer:
mbed_official
Date:
Tue Nov 20 17:24:08 2012 +0000
Revision:
0:fd0d7bdfcdc2
Child:
2:143cac498751
mbed sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #ifndef MBED_FUNCTIONPOINTER_H
mbed_official 0:fd0d7bdfcdc2 23 #define MBED_FUNCTIONPOINTER_H
mbed_official 0:fd0d7bdfcdc2 24
mbed_official 0:fd0d7bdfcdc2 25 #include <string.h>
mbed_official 0:fd0d7bdfcdc2 26
mbed_official 0:fd0d7bdfcdc2 27 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 28
mbed_official 0:fd0d7bdfcdc2 29 /** A class for storing and calling a pointer to a static or member void function
mbed_official 0:fd0d7bdfcdc2 30 */
mbed_official 0:fd0d7bdfcdc2 31 class FunctionPointer {
mbed_official 0:fd0d7bdfcdc2 32 public:
mbed_official 0:fd0d7bdfcdc2 33
mbed_official 0:fd0d7bdfcdc2 34 /** Create a FunctionPointer, attaching a static function
mbed_official 0:fd0d7bdfcdc2 35 *
mbed_official 0:fd0d7bdfcdc2 36 * @param function The void static function to attach (default is none)
mbed_official 0:fd0d7bdfcdc2 37 */
mbed_official 0:fd0d7bdfcdc2 38 FunctionPointer(void (*function)(void) = 0);
mbed_official 0:fd0d7bdfcdc2 39
mbed_official 0:fd0d7bdfcdc2 40 /** Create a FunctionPointer, attaching a member function
mbed_official 0:fd0d7bdfcdc2 41 *
mbed_official 0:fd0d7bdfcdc2 42 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
mbed_official 0:fd0d7bdfcdc2 43 * @param function The address of the void member function to attach
mbed_official 0:fd0d7bdfcdc2 44 */
mbed_official 0:fd0d7bdfcdc2 45 template<typename T>
mbed_official 0:fd0d7bdfcdc2 46 FunctionPointer(T *object, void (T::*member)(void)) {
mbed_official 0:fd0d7bdfcdc2 47 attach(object, member);
mbed_official 0:fd0d7bdfcdc2 48 }
mbed_official 0:fd0d7bdfcdc2 49
mbed_official 0:fd0d7bdfcdc2 50 /** Attach a static function
mbed_official 0:fd0d7bdfcdc2 51 *
mbed_official 0:fd0d7bdfcdc2 52 * @param function The void static function to attach (default is none)
mbed_official 0:fd0d7bdfcdc2 53 */
mbed_official 0:fd0d7bdfcdc2 54 void attach(void (*function)(void) = 0);
mbed_official 0:fd0d7bdfcdc2 55
mbed_official 0:fd0d7bdfcdc2 56 /** Attach a member function
mbed_official 0:fd0d7bdfcdc2 57 *
mbed_official 0:fd0d7bdfcdc2 58 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
mbed_official 0:fd0d7bdfcdc2 59 * @param function The address of the void member function to attach
mbed_official 0:fd0d7bdfcdc2 60 */
mbed_official 0:fd0d7bdfcdc2 61 template<typename T>
mbed_official 0:fd0d7bdfcdc2 62 void attach(T *object, void (T::*member)(void)) {
mbed_official 0:fd0d7bdfcdc2 63 _object = static_cast<void*>(object);
mbed_official 0:fd0d7bdfcdc2 64 memcpy(_member, (char*)&member, sizeof(member));
mbed_official 0:fd0d7bdfcdc2 65 _membercaller = &FunctionPointer::membercaller<T>;
mbed_official 0:fd0d7bdfcdc2 66 _function = 0;
mbed_official 0:fd0d7bdfcdc2 67 }
mbed_official 0:fd0d7bdfcdc2 68
mbed_official 0:fd0d7bdfcdc2 69 /** Call the attached static or member function
mbed_official 0:fd0d7bdfcdc2 70 */
mbed_official 0:fd0d7bdfcdc2 71 void call();
mbed_official 0:fd0d7bdfcdc2 72
mbed_official 0:fd0d7bdfcdc2 73 private:
mbed_official 0:fd0d7bdfcdc2 74 template<typename T>
mbed_official 0:fd0d7bdfcdc2 75 static void membercaller(void *object, char *member) {
mbed_official 0:fd0d7bdfcdc2 76 T* o = static_cast<T*>(object);
mbed_official 0:fd0d7bdfcdc2 77 void (T::*m)(void);
mbed_official 0:fd0d7bdfcdc2 78 memcpy((char*)&m, member, sizeof(m));
mbed_official 0:fd0d7bdfcdc2 79 (o->*m)();
mbed_official 0:fd0d7bdfcdc2 80 }
mbed_official 0:fd0d7bdfcdc2 81
mbed_official 0:fd0d7bdfcdc2 82 void (*_function)(void); // static function pointer - 0 if none attached
mbed_official 0:fd0d7bdfcdc2 83 void *_object; // object this pointer - 0 if none attached
mbed_official 0:fd0d7bdfcdc2 84 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
mbed_official 0:fd0d7bdfcdc2 85 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
mbed_official 0:fd0d7bdfcdc2 86 };
mbed_official 0:fd0d7bdfcdc2 87
mbed_official 0:fd0d7bdfcdc2 88 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 89
mbed_official 0:fd0d7bdfcdc2 90 #endif