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Dependencies:   PWM_Tone_Library DHT

mbed/CallChain.h@5:569a4894abc1, 2019-03-08 (annotated)

Committer:
aziz111
Date:
Fri Mar 08 17:15:02 2019 +0000
Revision:
5:569a4894abc1
Parent:
3:78f223d34f36 
Final

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ethaderu 3:78f223d34f36 1 /* mbed Microcontroller Library
ethaderu 3:78f223d34f36 2 * Copyright (c) 2006-2013 ARM Limited
ethaderu 3:78f223d34f36 3 *
ethaderu 3:78f223d34f36 4 * Licensed under the Apache License, Version 2.0 (the "License");
ethaderu 3:78f223d34f36 5 * you may not use this file except in compliance with the License.
ethaderu 3:78f223d34f36 6 * You may obtain a copy of the License at
ethaderu 3:78f223d34f36 7 *
ethaderu 3:78f223d34f36 8 * http://www.apache.org/licenses/LICENSE-2.0
ethaderu 3:78f223d34f36 9 *
ethaderu 3:78f223d34f36 10 * Unless required by applicable law or agreed to in writing, software
ethaderu 3:78f223d34f36 11 * distributed under the License is distributed on an "AS IS" BASIS,
ethaderu 3:78f223d34f36 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ethaderu 3:78f223d34f36 13 * See the License for the specific language governing permissions and
ethaderu 3:78f223d34f36 14 * limitations under the License.
ethaderu 3:78f223d34f36 15 */
ethaderu 3:78f223d34f36 16 #ifndef MBED_CALLCHAIN_H
ethaderu 3:78f223d34f36 17 #define MBED_CALLCHAIN_H
ethaderu 3:78f223d34f36 18
ethaderu 3:78f223d34f36 19 #include "FunctionPointer.h"
ethaderu 3:78f223d34f36 20 #include <string.h>
ethaderu 3:78f223d34f36 21
ethaderu 3:78f223d34f36 22 namespace mbed {
ethaderu 3:78f223d34f36 23
ethaderu 3:78f223d34f36 24 /** Group one or more functions in an instance of a CallChain, then call them in
ethaderu 3:78f223d34f36 25 * sequence using CallChain::call(). Used mostly by the interrupt chaining code,
ethaderu 3:78f223d34f36 26 * but can be used for other purposes.
ethaderu 3:78f223d34f36 27 *
ethaderu 3:78f223d34f36 28 * Example:
ethaderu 3:78f223d34f36 29 * @code
ethaderu 3:78f223d34f36 30 * #include "mbed.h"
ethaderu 3:78f223d34f36 31 *
ethaderu 3:78f223d34f36 32 * CallChain chain;
ethaderu 3:78f223d34f36 33 *
ethaderu 3:78f223d34f36 34 * void first(void) {
ethaderu 3:78f223d34f36 35 * printf("'first' function.\n");
ethaderu 3:78f223d34f36 36 * }
ethaderu 3:78f223d34f36 37 *
ethaderu 3:78f223d34f36 38 * void second(void) {
ethaderu 3:78f223d34f36 39 * printf("'second' function.\n");
ethaderu 3:78f223d34f36 40 * }
ethaderu 3:78f223d34f36 41 *
ethaderu 3:78f223d34f36 42 * class Test {
ethaderu 3:78f223d34f36 43 * public:
ethaderu 3:78f223d34f36 44 * void f(void) {
ethaderu 3:78f223d34f36 45 * printf("A::f (class member).\n");
ethaderu 3:78f223d34f36 46 * }
ethaderu 3:78f223d34f36 47 * };
ethaderu 3:78f223d34f36 48 *
ethaderu 3:78f223d34f36 49 * int main() {
ethaderu 3:78f223d34f36 50 * Test test;
ethaderu 3:78f223d34f36 51 *
ethaderu 3:78f223d34f36 52 * chain.add(second);
ethaderu 3:78f223d34f36 53 * chain.add_front(first);
ethaderu 3:78f223d34f36 54 * chain.add(&test, &Test::f);
ethaderu 3:78f223d34f36 55 * chain.call();
ethaderu 3:78f223d34f36 56 * }
ethaderu 3:78f223d34f36 57 * @endcode
ethaderu 3:78f223d34f36 58 */
ethaderu 3:78f223d34f36 59
ethaderu 3:78f223d34f36 60 typedef FunctionPointer* pFunctionPointer_t;
ethaderu 3:78f223d34f36 61
ethaderu 3:78f223d34f36 62 class CallChain {
ethaderu 3:78f223d34f36 63 public:
ethaderu 3:78f223d34f36 64 /** Create an empty chain
ethaderu 3:78f223d34f36 65 *
ethaderu 3:78f223d34f36 66 * @param size (optional) Initial size of the chain
ethaderu 3:78f223d34f36 67 */
ethaderu 3:78f223d34f36 68 CallChain(int size = 4);
ethaderu 3:78f223d34f36 69 virtual ~CallChain();
ethaderu 3:78f223d34f36 70
ethaderu 3:78f223d34f36 71 /** Add a function at the end of the chain
ethaderu 3:78f223d34f36 72 *
ethaderu 3:78f223d34f36 73 * @param function A pointer to a void function
ethaderu 3:78f223d34f36 74 *
ethaderu 3:78f223d34f36 75 * @returns
ethaderu 3:78f223d34f36 76 * The function object created for 'function'
ethaderu 3:78f223d34f36 77 */
ethaderu 3:78f223d34f36 78 pFunctionPointer_t add(void (*function)(void));
ethaderu 3:78f223d34f36 79
ethaderu 3:78f223d34f36 80 /** Add a function at the end of the chain
ethaderu 3:78f223d34f36 81 *
ethaderu 3:78f223d34f36 82 * @param tptr pointer to the object to call the member function on
ethaderu 3:78f223d34f36 83 * @param mptr pointer to the member function to be called
ethaderu 3:78f223d34f36 84 *
ethaderu 3:78f223d34f36 85 * @returns
ethaderu 3:78f223d34f36 86 * The function object created for 'tptr' and 'mptr'
ethaderu 3:78f223d34f36 87 */
ethaderu 3:78f223d34f36 88 template<typename T>
ethaderu 3:78f223d34f36 89 pFunctionPointer_t add(T *tptr, void (T::*mptr)(void)) {
ethaderu 3:78f223d34f36 90 return common_add(new FunctionPointer(tptr, mptr));
ethaderu 3:78f223d34f36 91 }
ethaderu 3:78f223d34f36 92
ethaderu 3:78f223d34f36 93 /** Add a function at the beginning of the chain
ethaderu 3:78f223d34f36 94 *
ethaderu 3:78f223d34f36 95 * @param function A pointer to a void function
ethaderu 3:78f223d34f36 96 *
ethaderu 3:78f223d34f36 97 * @returns
ethaderu 3:78f223d34f36 98 * The function object created for 'function'
ethaderu 3:78f223d34f36 99 */
ethaderu 3:78f223d34f36 100 pFunctionPointer_t add_front(void (*function)(void));
ethaderu 3:78f223d34f36 101
ethaderu 3:78f223d34f36 102 /** Add a function at the beginning of the chain
ethaderu 3:78f223d34f36 103 *
ethaderu 3:78f223d34f36 104 * @param tptr pointer to the object to call the member function on
ethaderu 3:78f223d34f36 105 * @param mptr pointer to the member function to be called
ethaderu 3:78f223d34f36 106 *
ethaderu 3:78f223d34f36 107 * @returns
ethaderu 3:78f223d34f36 108 * The function object created for 'tptr' and 'mptr'
ethaderu 3:78f223d34f36 109 */
ethaderu 3:78f223d34f36 110 template<typename T>
ethaderu 3:78f223d34f36 111 pFunctionPointer_t add_front(T *tptr, void (T::*mptr)(void)) {
ethaderu 3:78f223d34f36 112 return common_add_front(new FunctionPointer(tptr, mptr));
ethaderu 3:78f223d34f36 113 }
ethaderu 3:78f223d34f36 114
ethaderu 3:78f223d34f36 115 /** Get the number of functions in the chain
ethaderu 3:78f223d34f36 116 */
ethaderu 3:78f223d34f36 117 int size() const;
ethaderu 3:78f223d34f36 118
ethaderu 3:78f223d34f36 119 /** Get a function object from the chain
ethaderu 3:78f223d34f36 120 *
ethaderu 3:78f223d34f36 121 * @param i function object index
ethaderu 3:78f223d34f36 122 *
ethaderu 3:78f223d34f36 123 * @returns
ethaderu 3:78f223d34f36 124 * The function object at position 'i' in the chain
ethaderu 3:78f223d34f36 125 */
ethaderu 3:78f223d34f36 126 pFunctionPointer_t get(int i) const;
ethaderu 3:78f223d34f36 127
ethaderu 3:78f223d34f36 128 /** Look for a function object in the call chain
ethaderu 3:78f223d34f36 129 *
ethaderu 3:78f223d34f36 130 * @param f the function object to search
ethaderu 3:78f223d34f36 131 *
ethaderu 3:78f223d34f36 132 * @returns
ethaderu 3:78f223d34f36 133 * The index of the function object if found, -1 otherwise.
ethaderu 3:78f223d34f36 134 */
ethaderu 3:78f223d34f36 135 int find(pFunctionPointer_t f) const;
ethaderu 3:78f223d34f36 136
ethaderu 3:78f223d34f36 137 /** Clear the call chain (remove all functions in the chain).
ethaderu 3:78f223d34f36 138 */
ethaderu 3:78f223d34f36 139 void clear();
ethaderu 3:78f223d34f36 140
ethaderu 3:78f223d34f36 141 /** Remove a function object from the chain
ethaderu 3:78f223d34f36 142 *
ethaderu 3:78f223d34f36 143 * @arg f the function object to remove
ethaderu 3:78f223d34f36 144 *
ethaderu 3:78f223d34f36 145 * @returns
ethaderu 3:78f223d34f36 146 * true if the function object was found and removed, false otherwise.
ethaderu 3:78f223d34f36 147 */
ethaderu 3:78f223d34f36 148 bool remove(pFunctionPointer_t f);
ethaderu 3:78f223d34f36 149
ethaderu 3:78f223d34f36 150 /** Call all the functions in the chain in sequence
ethaderu 3:78f223d34f36 151 */
ethaderu 3:78f223d34f36 152 void call();
ethaderu 3:78f223d34f36 153
ethaderu 3:78f223d34f36 154 #ifdef MBED_OPERATORS
ethaderu 3:78f223d34f36 155 void operator ()(void) {
ethaderu 3:78f223d34f36 156 call();
ethaderu 3:78f223d34f36 157 }
ethaderu 3:78f223d34f36 158 pFunctionPointer_t operator [](int i) const {
ethaderu 3:78f223d34f36 159 return get(i);
ethaderu 3:78f223d34f36 160 }
ethaderu 3:78f223d34f36 161 #endif
ethaderu 3:78f223d34f36 162
ethaderu 3:78f223d34f36 163 private:
ethaderu 3:78f223d34f36 164 void _check_size();
ethaderu 3:78f223d34f36 165 pFunctionPointer_t common_add(pFunctionPointer_t pf);
ethaderu 3:78f223d34f36 166 pFunctionPointer_t common_add_front(pFunctionPointer_t pf);
ethaderu 3:78f223d34f36 167
ethaderu 3:78f223d34f36 168 pFunctionPointer_t* _chain;
ethaderu 3:78f223d34f36 169 int _size;
ethaderu 3:78f223d34f36 170 int _elements;
ethaderu 3:78f223d34f36 171
ethaderu 3:78f223d34f36 172 /* disallow copy constructor and assignment operators */
ethaderu 3:78f223d34f36 173 private:
ethaderu 3:78f223d34f36 174 CallChain(const CallChain&);
ethaderu 3:78f223d34f36 175 CallChain & operator = (const CallChain&);
ethaderu 3:78f223d34f36 176 };
ethaderu 3:78f223d34f36 177
ethaderu 3:78f223d34f36 178 } // namespace mbed
ethaderu 3:78f223d34f36 179
ethaderu 3:78f223d34f36 180 #endif
ethaderu 3:78f223d34f36 181