Flexible templated function class and related utilities that avoid dynamic memory allocation without limiting functionality
FuncPtr provides a flexible templated function class and related utilities while avoiding dynamic memory allocation and avoiding limited functionality.
FuncPtr provides an intuitive template interface:
FuncPtr<void(const char *)> func(puts); func("hello!\n"); // prints hello!
Several function types are supported by FuncPtr:
// Simple C functions void func(); FuncPtr<void()> fp(func); // C++ Methods struct Thing { void func(); }; Thing thing; FuncPtr<void()> fp(&thing, &Thing::func); // C functions with context void func(Thing *); FuncPtr<void()> fp(&thing, func); // Function objects struct Thing { void operator()(); }; Thing thing; FuncPtr<void()> fp(&thing);
There is no dynamic memory allocation, managing memory is placed entirely on the user. More advanced function manipulation can be accomplished with statically allocated classes:
// Function binding Binder<void(const char *), const char *> bind(putc, "hi!"); bind(); // prints hi! // Function composition Composer<int(const char *), const char *(int)> comp(puts, itoa); comp(10); // prints 10 // Function chaining Chainer<void(const char *), 2> chain; chain.attach(puts); chain.attach(puts); chain("hi!\n"); // prints hi! twice
FuncPtr allows easy support of a large range of function types in C++ APIs with very few lines of code:
class Thing { public: // The following two methods are sufficient for supporting // every supported function type void attach(FuncPtr<void()> func) { _func.attach(func); } template<typename T, typename M> void attach(T *obj, M method) { attach(FuncPtr<void()>(obj, method)); } private: FuncPtr<void()> _func; }
Additionally, FuncPtrs have several utilities for easy integration with C APIs:
// C style callbacks void register_callback(void (*callback)(void *), void *data); register_callback(&FuncPtr<void()>::thunk, &func); // C style functions without context void register_callback(void (*callback)()); Thunker thunk(func); register_callback(thunk); // mbed style callbacks void register_callback(T *obj, void (T::*M)()); register_callback(&func, &FuncPtr<void()>::call);
Chainer.h@18:a0fde14b6c39, 2016-04-17 (annotated)
- Committer:
- Christopher Haster
- Date:
- Sun Apr 17 23:38:04 2016 -0500
- Revision:
- 18:a0fde14b6c39
- Parent:
- 15:0c3d1c4a050b
Increase to 5 args
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Christopher Haster |
7:9a62ba2d3d68 | 1 | /* Chainer |
Christopher Haster |
7:9a62ba2d3d68 | 2 | * Static function chaining |
Christopher Haster |
7:9a62ba2d3d68 | 3 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 4 | #ifndef CHAINER_H |
Christopher Haster |
7:9a62ba2d3d68 | 5 | #define CHAINER_H |
Christopher Haster |
7:9a62ba2d3d68 | 6 | |
Christopher Haster |
7:9a62ba2d3d68 | 7 | #include "FuncPtr.h" |
Christopher Haster |
7:9a62ba2d3d68 | 8 | |
Christopher Haster |
7:9a62ba2d3d68 | 9 | |
Christopher Haster |
7:9a62ba2d3d68 | 10 | /** Static function chaining |
Christopher Haster |
7:9a62ba2d3d68 | 11 | */ |
Christopher Haster |
15:0c3d1c4a050b | 12 | template <typename F, int N> |
Christopher Haster |
7:9a62ba2d3d68 | 13 | class Chainer; |
Christopher Haster |
7:9a62ba2d3d68 | 14 | |
Christopher Haster |
7:9a62ba2d3d68 | 15 | /** Static function composition |
Christopher Haster |
7:9a62ba2d3d68 | 16 | */ |
Christopher Haster |
18:a0fde14b6c39 | 17 | template <typename A0, typename A1, typename A2, typename A3, typename A4, int N> |
Christopher Haster |
18:a0fde14b6c39 | 18 | class Chainer<void(A0, A1, A2, A3, A4), N> { |
Christopher Haster |
18:a0fde14b6c39 | 19 | public: |
Christopher Haster |
18:a0fde14b6c39 | 20 | /** Access a function in the chain |
Christopher Haster |
18:a0fde14b6c39 | 21 | */ |
Christopher Haster |
18:a0fde14b6c39 | 22 | FuncPtr<void(A0, A1, A2, A3, A4)> &operator[](int i) { |
Christopher Haster |
18:a0fde14b6c39 | 23 | return _funcs[i]; |
Christopher Haster |
18:a0fde14b6c39 | 24 | } |
Christopher Haster |
18:a0fde14b6c39 | 25 | |
Christopher Haster |
18:a0fde14b6c39 | 26 | /** Attach a function to the chain |
Christopher Haster |
18:a0fde14b6c39 | 27 | */ |
Christopher Haster |
18:a0fde14b6c39 | 28 | bool attach(FuncPtr<void(A0, A1, A2, A3, A4)> func) { |
Christopher Haster |
18:a0fde14b6c39 | 29 | for (int i = 0; i < N; i++) { |
Christopher Haster |
18:a0fde14b6c39 | 30 | if (!_funcs[i]) { |
Christopher Haster |
18:a0fde14b6c39 | 31 | _funcs[i].attach(func); |
Christopher Haster |
18:a0fde14b6c39 | 32 | return true; |
Christopher Haster |
18:a0fde14b6c39 | 33 | } |
Christopher Haster |
18:a0fde14b6c39 | 34 | } |
Christopher Haster |
18:a0fde14b6c39 | 35 | |
Christopher Haster |
18:a0fde14b6c39 | 36 | return false; |
Christopher Haster |
18:a0fde14b6c39 | 37 | } |
Christopher Haster |
18:a0fde14b6c39 | 38 | |
Christopher Haster |
18:a0fde14b6c39 | 39 | /** Attach a function to the chain |
Christopher Haster |
18:a0fde14b6c39 | 40 | */ |
Christopher Haster |
18:a0fde14b6c39 | 41 | template <typename T, typename M> |
Christopher Haster |
18:a0fde14b6c39 | 42 | bool attach(T *obj, M method) { |
Christopher Haster |
18:a0fde14b6c39 | 43 | return attach(FuncPtr<void(A0, A1, A2, A3, A4)>(obj, method)); |
Christopher Haster |
18:a0fde14b6c39 | 44 | } |
Christopher Haster |
18:a0fde14b6c39 | 45 | |
Christopher Haster |
18:a0fde14b6c39 | 46 | /** Call each function in the chain |
Christopher Haster |
18:a0fde14b6c39 | 47 | */ |
Christopher Haster |
18:a0fde14b6c39 | 48 | void call(A0 a0, A1 a1, A2 a2, A3 a3, A4 a4) { |
Christopher Haster |
18:a0fde14b6c39 | 49 | for (int i = 0; i < N; i++) { |
Christopher Haster |
18:a0fde14b6c39 | 50 | if (_funcs[i]) { |
Christopher Haster |
18:a0fde14b6c39 | 51 | _funcs[i](a0, a1, a2, a3, a4); |
Christopher Haster |
18:a0fde14b6c39 | 52 | } |
Christopher Haster |
18:a0fde14b6c39 | 53 | } |
Christopher Haster |
18:a0fde14b6c39 | 54 | } |
Christopher Haster |
18:a0fde14b6c39 | 55 | |
Christopher Haster |
18:a0fde14b6c39 | 56 | /** Call each function in the chain |
Christopher Haster |
18:a0fde14b6c39 | 57 | */ |
Christopher Haster |
18:a0fde14b6c39 | 58 | void operator()(A0 a0, A1 a1, A2 a2, A3 a3, A4 a4) { |
Christopher Haster |
18:a0fde14b6c39 | 59 | return call(a0, a1, a2, a3, a4); |
Christopher Haster |
18:a0fde14b6c39 | 60 | } |
Christopher Haster |
18:a0fde14b6c39 | 61 | |
Christopher Haster |
18:a0fde14b6c39 | 62 | /** Test if any functions have been attached |
Christopher Haster |
18:a0fde14b6c39 | 63 | */ |
Christopher Haster |
18:a0fde14b6c39 | 64 | operator bool() const { |
Christopher Haster |
18:a0fde14b6c39 | 65 | for (int i = 0; i < N; i++) { |
Christopher Haster |
18:a0fde14b6c39 | 66 | if (_funcs[i]) { |
Christopher Haster |
18:a0fde14b6c39 | 67 | return true; |
Christopher Haster |
18:a0fde14b6c39 | 68 | } |
Christopher Haster |
18:a0fde14b6c39 | 69 | } |
Christopher Haster |
18:a0fde14b6c39 | 70 | return false; |
Christopher Haster |
18:a0fde14b6c39 | 71 | } |
Christopher Haster |
18:a0fde14b6c39 | 72 | |
Christopher Haster |
18:a0fde14b6c39 | 73 | /** Static thunk for passing as C-style function |
Christopher Haster |
18:a0fde14b6c39 | 74 | * @param func Chainer to call passed as void pointer |
Christopher Haster |
18:a0fde14b6c39 | 75 | */ |
Christopher Haster |
18:a0fde14b6c39 | 76 | static void thunk(void *func, A0 a0, A1 a1, A2 a2, A3 a3, A4 a4) { |
Christopher Haster |
18:a0fde14b6c39 | 77 | return static_cast<Chainer<void(A0, A1, A2, A3, A4), N>*>(func) |
Christopher Haster |
18:a0fde14b6c39 | 78 | ->call(a0, a1, a2, a3, a4); |
Christopher Haster |
18:a0fde14b6c39 | 79 | } |
Christopher Haster |
18:a0fde14b6c39 | 80 | |
Christopher Haster |
18:a0fde14b6c39 | 81 | private: |
Christopher Haster |
18:a0fde14b6c39 | 82 | FuncPtr<void(A0, A1, A2, A3, A4)> _funcs[N]; |
Christopher Haster |
18:a0fde14b6c39 | 83 | }; |
Christopher Haster |
18:a0fde14b6c39 | 84 | |
Christopher Haster |
18:a0fde14b6c39 | 85 | /** Static function composition |
Christopher Haster |
18:a0fde14b6c39 | 86 | */ |
Christopher Haster |
15:0c3d1c4a050b | 87 | template <typename A0, typename A1, typename A2, typename A3, int N> |
Christopher Haster |
15:0c3d1c4a050b | 88 | class Chainer<void(A0, A1, A2, A3), N> { |
Christopher Haster |
7:9a62ba2d3d68 | 89 | public: |
Christopher Haster |
7:9a62ba2d3d68 | 90 | /** Access a function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 91 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 92 | FuncPtr<void(A0, A1, A2, A3)> &operator[](int i) { |
Christopher Haster |
7:9a62ba2d3d68 | 93 | return _funcs[i]; |
Christopher Haster |
7:9a62ba2d3d68 | 94 | } |
Christopher Haster |
7:9a62ba2d3d68 | 95 | |
Christopher Haster |
7:9a62ba2d3d68 | 96 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 97 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 98 | bool attach(FuncPtr<void(A0, A1, A2, A3)> func) { |
Christopher Haster |
7:9a62ba2d3d68 | 99 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 100 | if (!_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 101 | _funcs[i].attach(func); |
Christopher Haster |
7:9a62ba2d3d68 | 102 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 103 | } |
Christopher Haster |
7:9a62ba2d3d68 | 104 | } |
Christopher Haster |
7:9a62ba2d3d68 | 105 | |
Christopher Haster |
7:9a62ba2d3d68 | 106 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 107 | } |
Christopher Haster |
7:9a62ba2d3d68 | 108 | |
Christopher Haster |
7:9a62ba2d3d68 | 109 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 110 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 111 | template <typename T, typename M> |
Christopher Haster |
7:9a62ba2d3d68 | 112 | bool attach(T *obj, M method) { |
Christopher Haster |
7:9a62ba2d3d68 | 113 | return attach(FuncPtr<void(A0, A1, A2, A3)>(obj, method)); |
Christopher Haster |
7:9a62ba2d3d68 | 114 | } |
Christopher Haster |
7:9a62ba2d3d68 | 115 | |
Christopher Haster |
7:9a62ba2d3d68 | 116 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 117 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 118 | void call(A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
7:9a62ba2d3d68 | 119 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 120 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 121 | _funcs[i](a0, a1, a2, a3); |
Christopher Haster |
7:9a62ba2d3d68 | 122 | } |
Christopher Haster |
7:9a62ba2d3d68 | 123 | } |
Christopher Haster |
7:9a62ba2d3d68 | 124 | } |
Christopher Haster |
7:9a62ba2d3d68 | 125 | |
Christopher Haster |
7:9a62ba2d3d68 | 126 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 127 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 128 | void operator()(A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
7:9a62ba2d3d68 | 129 | return call(a0, a1, a2, a3); |
Christopher Haster |
7:9a62ba2d3d68 | 130 | } |
Christopher Haster |
7:9a62ba2d3d68 | 131 | |
Christopher Haster |
7:9a62ba2d3d68 | 132 | /** Test if any functions have been attached |
Christopher Haster |
7:9a62ba2d3d68 | 133 | */ |
Christopher Haster |
8:71037a47492d | 134 | operator bool() const { |
Christopher Haster |
7:9a62ba2d3d68 | 135 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 136 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 137 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 138 | } |
Christopher Haster |
7:9a62ba2d3d68 | 139 | } |
Christopher Haster |
7:9a62ba2d3d68 | 140 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 141 | } |
Christopher Haster |
7:9a62ba2d3d68 | 142 | |
Christopher Haster |
7:9a62ba2d3d68 | 143 | /** Static thunk for passing as C-style function |
Christopher Haster |
7:9a62ba2d3d68 | 144 | * @param func Chainer to call passed as void pointer |
Christopher Haster |
7:9a62ba2d3d68 | 145 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 146 | static void thunk(void *func, A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
15:0c3d1c4a050b | 147 | return static_cast<Chainer<void(A0, A1, A2, A3), N>*>(func) |
Christopher Haster |
7:9a62ba2d3d68 | 148 | ->call(a0, a1, a2, a3); |
Christopher Haster |
7:9a62ba2d3d68 | 149 | } |
Christopher Haster |
7:9a62ba2d3d68 | 150 | |
Christopher Haster |
7:9a62ba2d3d68 | 151 | private: |
Christopher Haster |
7:9a62ba2d3d68 | 152 | FuncPtr<void(A0, A1, A2, A3)> _funcs[N]; |
Christopher Haster |
7:9a62ba2d3d68 | 153 | }; |
Christopher Haster |
7:9a62ba2d3d68 | 154 | |
Christopher Haster |
7:9a62ba2d3d68 | 155 | /** Static function composition |
Christopher Haster |
7:9a62ba2d3d68 | 156 | */ |
Christopher Haster |
15:0c3d1c4a050b | 157 | template <typename A0, typename A1, typename A2, int N> |
Christopher Haster |
15:0c3d1c4a050b | 158 | class Chainer<void(A0, A1, A2), N> { |
Christopher Haster |
7:9a62ba2d3d68 | 159 | public: |
Christopher Haster |
7:9a62ba2d3d68 | 160 | /** Access a function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 161 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 162 | FuncPtr<void(A0, A1, A2)> &operator[](int i) { |
Christopher Haster |
7:9a62ba2d3d68 | 163 | return _funcs[i]; |
Christopher Haster |
7:9a62ba2d3d68 | 164 | } |
Christopher Haster |
7:9a62ba2d3d68 | 165 | |
Christopher Haster |
7:9a62ba2d3d68 | 166 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 167 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 168 | bool attach(FuncPtr<void(A0, A1, A2)> func) { |
Christopher Haster |
7:9a62ba2d3d68 | 169 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 170 | if (!_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 171 | _funcs[i].attach(func); |
Christopher Haster |
7:9a62ba2d3d68 | 172 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 173 | } |
Christopher Haster |
7:9a62ba2d3d68 | 174 | } |
Christopher Haster |
7:9a62ba2d3d68 | 175 | |
Christopher Haster |
7:9a62ba2d3d68 | 176 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 177 | } |
Christopher Haster |
7:9a62ba2d3d68 | 178 | |
Christopher Haster |
7:9a62ba2d3d68 | 179 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 180 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 181 | template <typename T, typename M> |
Christopher Haster |
7:9a62ba2d3d68 | 182 | bool attach(T *obj, M method) { |
Christopher Haster |
7:9a62ba2d3d68 | 183 | return attach(FuncPtr<void(A0, A1, A2)>(obj, method)); |
Christopher Haster |
7:9a62ba2d3d68 | 184 | } |
Christopher Haster |
7:9a62ba2d3d68 | 185 | |
Christopher Haster |
7:9a62ba2d3d68 | 186 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 187 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 188 | void call(A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
7:9a62ba2d3d68 | 189 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 190 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 191 | _funcs[i](a0, a1, a2); |
Christopher Haster |
7:9a62ba2d3d68 | 192 | } |
Christopher Haster |
7:9a62ba2d3d68 | 193 | } |
Christopher Haster |
7:9a62ba2d3d68 | 194 | } |
Christopher Haster |
7:9a62ba2d3d68 | 195 | |
Christopher Haster |
7:9a62ba2d3d68 | 196 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 197 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 198 | void operator()(A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
7:9a62ba2d3d68 | 199 | return call(a0, a1, a2); |
Christopher Haster |
7:9a62ba2d3d68 | 200 | } |
Christopher Haster |
7:9a62ba2d3d68 | 201 | |
Christopher Haster |
7:9a62ba2d3d68 | 202 | /** Test if any functions have been attached |
Christopher Haster |
7:9a62ba2d3d68 | 203 | */ |
Christopher Haster |
8:71037a47492d | 204 | operator bool() const { |
Christopher Haster |
7:9a62ba2d3d68 | 205 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 206 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 207 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 208 | } |
Christopher Haster |
7:9a62ba2d3d68 | 209 | } |
Christopher Haster |
7:9a62ba2d3d68 | 210 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 211 | } |
Christopher Haster |
7:9a62ba2d3d68 | 212 | |
Christopher Haster |
7:9a62ba2d3d68 | 213 | /** Static thunk for passing as C-style function |
Christopher Haster |
7:9a62ba2d3d68 | 214 | * @param func Chainer to call passed as void pointer |
Christopher Haster |
7:9a62ba2d3d68 | 215 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 216 | static void thunk(void *func, A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
15:0c3d1c4a050b | 217 | return static_cast<Chainer<void(A0, A1, A2), N>*>(func) |
Christopher Haster |
7:9a62ba2d3d68 | 218 | ->call(a0, a1, a2); |
Christopher Haster |
7:9a62ba2d3d68 | 219 | } |
Christopher Haster |
7:9a62ba2d3d68 | 220 | |
Christopher Haster |
7:9a62ba2d3d68 | 221 | private: |
Christopher Haster |
7:9a62ba2d3d68 | 222 | FuncPtr<void(A0, A1, A2)> _funcs[N]; |
Christopher Haster |
7:9a62ba2d3d68 | 223 | }; |
Christopher Haster |
7:9a62ba2d3d68 | 224 | |
Christopher Haster |
7:9a62ba2d3d68 | 225 | /** Static function composition |
Christopher Haster |
7:9a62ba2d3d68 | 226 | */ |
Christopher Haster |
15:0c3d1c4a050b | 227 | template <typename A0, typename A1, int N> |
Christopher Haster |
15:0c3d1c4a050b | 228 | class Chainer<void(A0, A1), N> { |
Christopher Haster |
7:9a62ba2d3d68 | 229 | public: |
Christopher Haster |
7:9a62ba2d3d68 | 230 | /** Access a function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 231 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 232 | FuncPtr<void(A0, A1)> &operator[](int i) { |
Christopher Haster |
7:9a62ba2d3d68 | 233 | return _funcs[i]; |
Christopher Haster |
7:9a62ba2d3d68 | 234 | } |
Christopher Haster |
7:9a62ba2d3d68 | 235 | |
Christopher Haster |
7:9a62ba2d3d68 | 236 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 237 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 238 | bool attach(FuncPtr<void(A0, A1)> func) { |
Christopher Haster |
7:9a62ba2d3d68 | 239 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 240 | if (!_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 241 | _funcs[i].attach(func); |
Christopher Haster |
7:9a62ba2d3d68 | 242 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 243 | } |
Christopher Haster |
7:9a62ba2d3d68 | 244 | } |
Christopher Haster |
7:9a62ba2d3d68 | 245 | |
Christopher Haster |
7:9a62ba2d3d68 | 246 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 247 | } |
Christopher Haster |
7:9a62ba2d3d68 | 248 | |
Christopher Haster |
7:9a62ba2d3d68 | 249 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 250 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 251 | template <typename T, typename M> |
Christopher Haster |
7:9a62ba2d3d68 | 252 | bool attach(T *obj, M method) { |
Christopher Haster |
7:9a62ba2d3d68 | 253 | return attach(FuncPtr<void(A0, A1)>(obj, method)); |
Christopher Haster |
7:9a62ba2d3d68 | 254 | } |
Christopher Haster |
7:9a62ba2d3d68 | 255 | |
Christopher Haster |
7:9a62ba2d3d68 | 256 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 257 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 258 | void call(A0 a0, A1 a1) { |
Christopher Haster |
7:9a62ba2d3d68 | 259 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 260 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 261 | _funcs[i](a0, a1); |
Christopher Haster |
7:9a62ba2d3d68 | 262 | } |
Christopher Haster |
7:9a62ba2d3d68 | 263 | } |
Christopher Haster |
7:9a62ba2d3d68 | 264 | } |
Christopher Haster |
7:9a62ba2d3d68 | 265 | |
Christopher Haster |
7:9a62ba2d3d68 | 266 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 267 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 268 | void operator()(A0 a0, A1 a1) { |
Christopher Haster |
7:9a62ba2d3d68 | 269 | return call(a0, a1); |
Christopher Haster |
7:9a62ba2d3d68 | 270 | } |
Christopher Haster |
7:9a62ba2d3d68 | 271 | |
Christopher Haster |
7:9a62ba2d3d68 | 272 | /** Test if any functions have been attached |
Christopher Haster |
7:9a62ba2d3d68 | 273 | */ |
Christopher Haster |
8:71037a47492d | 274 | operator bool() const { |
Christopher Haster |
7:9a62ba2d3d68 | 275 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 276 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 277 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 278 | } |
Christopher Haster |
7:9a62ba2d3d68 | 279 | } |
Christopher Haster |
7:9a62ba2d3d68 | 280 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 281 | } |
Christopher Haster |
7:9a62ba2d3d68 | 282 | |
Christopher Haster |
7:9a62ba2d3d68 | 283 | /** Static thunk for passing as C-style function |
Christopher Haster |
7:9a62ba2d3d68 | 284 | * @param func Chainer to call passed as void pointer |
Christopher Haster |
7:9a62ba2d3d68 | 285 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 286 | static void thunk(void *func, A0 a0, A1 a1) { |
Christopher Haster |
15:0c3d1c4a050b | 287 | return static_cast<Chainer<void(A0, A1), N>*>(func) |
Christopher Haster |
7:9a62ba2d3d68 | 288 | ->call(a0, a1); |
Christopher Haster |
7:9a62ba2d3d68 | 289 | } |
Christopher Haster |
7:9a62ba2d3d68 | 290 | |
Christopher Haster |
7:9a62ba2d3d68 | 291 | private: |
Christopher Haster |
7:9a62ba2d3d68 | 292 | FuncPtr<void(A0, A1)> _funcs[N]; |
Christopher Haster |
7:9a62ba2d3d68 | 293 | }; |
Christopher Haster |
7:9a62ba2d3d68 | 294 | |
Christopher Haster |
7:9a62ba2d3d68 | 295 | /** Static function composition |
Christopher Haster |
7:9a62ba2d3d68 | 296 | */ |
Christopher Haster |
15:0c3d1c4a050b | 297 | template <typename A0, int N> |
Christopher Haster |
15:0c3d1c4a050b | 298 | class Chainer<void(A0), N> { |
Christopher Haster |
7:9a62ba2d3d68 | 299 | public: |
Christopher Haster |
7:9a62ba2d3d68 | 300 | /** Access a function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 301 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 302 | FuncPtr<void(A0)> &operator[](int i) { |
Christopher Haster |
7:9a62ba2d3d68 | 303 | return _funcs[i]; |
Christopher Haster |
7:9a62ba2d3d68 | 304 | } |
Christopher Haster |
7:9a62ba2d3d68 | 305 | |
Christopher Haster |
7:9a62ba2d3d68 | 306 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 307 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 308 | bool attach(FuncPtr<void(A0)> func) { |
Christopher Haster |
7:9a62ba2d3d68 | 309 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 310 | if (!_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 311 | _funcs[i].attach(func); |
Christopher Haster |
7:9a62ba2d3d68 | 312 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 313 | } |
Christopher Haster |
7:9a62ba2d3d68 | 314 | } |
Christopher Haster |
7:9a62ba2d3d68 | 315 | |
Christopher Haster |
7:9a62ba2d3d68 | 316 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 317 | } |
Christopher Haster |
7:9a62ba2d3d68 | 318 | |
Christopher Haster |
7:9a62ba2d3d68 | 319 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 320 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 321 | template <typename T, typename M> |
Christopher Haster |
7:9a62ba2d3d68 | 322 | bool attach(T *obj, M method) { |
Christopher Haster |
7:9a62ba2d3d68 | 323 | return attach(FuncPtr<void(A0)>(obj, method)); |
Christopher Haster |
7:9a62ba2d3d68 | 324 | } |
Christopher Haster |
7:9a62ba2d3d68 | 325 | |
Christopher Haster |
7:9a62ba2d3d68 | 326 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 327 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 328 | void call(A0 a0) { |
Christopher Haster |
7:9a62ba2d3d68 | 329 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 330 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 331 | _funcs[i](a0); |
Christopher Haster |
7:9a62ba2d3d68 | 332 | } |
Christopher Haster |
7:9a62ba2d3d68 | 333 | } |
Christopher Haster |
7:9a62ba2d3d68 | 334 | } |
Christopher Haster |
7:9a62ba2d3d68 | 335 | |
Christopher Haster |
7:9a62ba2d3d68 | 336 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 337 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 338 | void operator()(A0 a0) { |
Christopher Haster |
7:9a62ba2d3d68 | 339 | return call(a0); |
Christopher Haster |
7:9a62ba2d3d68 | 340 | } |
Christopher Haster |
7:9a62ba2d3d68 | 341 | |
Christopher Haster |
7:9a62ba2d3d68 | 342 | /** Test if any functions have been attached |
Christopher Haster |
7:9a62ba2d3d68 | 343 | */ |
Christopher Haster |
8:71037a47492d | 344 | operator bool() const { |
Christopher Haster |
7:9a62ba2d3d68 | 345 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 346 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 347 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 348 | } |
Christopher Haster |
7:9a62ba2d3d68 | 349 | } |
Christopher Haster |
7:9a62ba2d3d68 | 350 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 351 | } |
Christopher Haster |
7:9a62ba2d3d68 | 352 | |
Christopher Haster |
7:9a62ba2d3d68 | 353 | /** Static thunk for passing as C-style function |
Christopher Haster |
7:9a62ba2d3d68 | 354 | * @param func Chainer to call passed as void pointer |
Christopher Haster |
7:9a62ba2d3d68 | 355 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 356 | static void thunk(void *func, A0 a0) { |
Christopher Haster |
15:0c3d1c4a050b | 357 | return static_cast<Chainer<void(A0), N>*>(func) |
Christopher Haster |
7:9a62ba2d3d68 | 358 | ->call(a0); |
Christopher Haster |
7:9a62ba2d3d68 | 359 | } |
Christopher Haster |
7:9a62ba2d3d68 | 360 | |
Christopher Haster |
7:9a62ba2d3d68 | 361 | private: |
Christopher Haster |
7:9a62ba2d3d68 | 362 | FuncPtr<void(A0)> _funcs[N]; |
Christopher Haster |
7:9a62ba2d3d68 | 363 | }; |
Christopher Haster |
7:9a62ba2d3d68 | 364 | |
Christopher Haster |
7:9a62ba2d3d68 | 365 | /** Static function composition |
Christopher Haster |
7:9a62ba2d3d68 | 366 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 367 | template <int N> |
Christopher Haster |
15:0c3d1c4a050b | 368 | class Chainer<void(), N> { |
Christopher Haster |
7:9a62ba2d3d68 | 369 | public: |
Christopher Haster |
7:9a62ba2d3d68 | 370 | /** Access a function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 371 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 372 | FuncPtr<void()> &operator[](int i) { |
Christopher Haster |
7:9a62ba2d3d68 | 373 | return _funcs[i]; |
Christopher Haster |
7:9a62ba2d3d68 | 374 | } |
Christopher Haster |
7:9a62ba2d3d68 | 375 | |
Christopher Haster |
7:9a62ba2d3d68 | 376 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 377 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 378 | bool attach(FuncPtr<void()> func) { |
Christopher Haster |
7:9a62ba2d3d68 | 379 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 380 | if (!_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 381 | _funcs[i].attach(func); |
Christopher Haster |
7:9a62ba2d3d68 | 382 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 383 | } |
Christopher Haster |
7:9a62ba2d3d68 | 384 | } |
Christopher Haster |
7:9a62ba2d3d68 | 385 | |
Christopher Haster |
7:9a62ba2d3d68 | 386 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 387 | } |
Christopher Haster |
7:9a62ba2d3d68 | 388 | |
Christopher Haster |
7:9a62ba2d3d68 | 389 | /** Attach a function to the chain |
Christopher Haster |
7:9a62ba2d3d68 | 390 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 391 | template <typename T, typename M> |
Christopher Haster |
7:9a62ba2d3d68 | 392 | bool attach(T *obj, M method) { |
Christopher Haster |
7:9a62ba2d3d68 | 393 | return attach(FuncPtr<void()>(obj, method)); |
Christopher Haster |
7:9a62ba2d3d68 | 394 | } |
Christopher Haster |
7:9a62ba2d3d68 | 395 | |
Christopher Haster |
7:9a62ba2d3d68 | 396 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 397 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 398 | void call() { |
Christopher Haster |
7:9a62ba2d3d68 | 399 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 400 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 401 | _funcs[i](); |
Christopher Haster |
7:9a62ba2d3d68 | 402 | } |
Christopher Haster |
7:9a62ba2d3d68 | 403 | } |
Christopher Haster |
7:9a62ba2d3d68 | 404 | } |
Christopher Haster |
7:9a62ba2d3d68 | 405 | |
Christopher Haster |
7:9a62ba2d3d68 | 406 | /** Call each function in the chain |
Christopher Haster |
7:9a62ba2d3d68 | 407 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 408 | void operator()() { |
Christopher Haster |
7:9a62ba2d3d68 | 409 | return call(); |
Christopher Haster |
7:9a62ba2d3d68 | 410 | } |
Christopher Haster |
7:9a62ba2d3d68 | 411 | |
Christopher Haster |
7:9a62ba2d3d68 | 412 | /** Test if any functions have been attached |
Christopher Haster |
7:9a62ba2d3d68 | 413 | */ |
Christopher Haster |
8:71037a47492d | 414 | operator bool() const { |
Christopher Haster |
7:9a62ba2d3d68 | 415 | for (int i = 0; i < N; i++) { |
Christopher Haster |
7:9a62ba2d3d68 | 416 | if (_funcs[i]) { |
Christopher Haster |
7:9a62ba2d3d68 | 417 | return true; |
Christopher Haster |
7:9a62ba2d3d68 | 418 | } |
Christopher Haster |
7:9a62ba2d3d68 | 419 | } |
Christopher Haster |
7:9a62ba2d3d68 | 420 | return false; |
Christopher Haster |
7:9a62ba2d3d68 | 421 | } |
Christopher Haster |
7:9a62ba2d3d68 | 422 | |
Christopher Haster |
7:9a62ba2d3d68 | 423 | /** Static thunk for passing as C-style function |
Christopher Haster |
7:9a62ba2d3d68 | 424 | * @param func Chainer to call passed as void pointer |
Christopher Haster |
7:9a62ba2d3d68 | 425 | */ |
Christopher Haster |
7:9a62ba2d3d68 | 426 | static void thunk(void *func) { |
Christopher Haster |
15:0c3d1c4a050b | 427 | return static_cast<Chainer<void(), N>*>(func) |
Christopher Haster |
7:9a62ba2d3d68 | 428 | ->call(); |
Christopher Haster |
7:9a62ba2d3d68 | 429 | } |
Christopher Haster |
7:9a62ba2d3d68 | 430 | |
Christopher Haster |
7:9a62ba2d3d68 | 431 | private: |
Christopher Haster |
7:9a62ba2d3d68 | 432 | FuncPtr<void()> _funcs[N]; |
Christopher Haster |
7:9a62ba2d3d68 | 433 | }; |
Christopher Haster |
7:9a62ba2d3d68 | 434 | |
Christopher Haster |
7:9a62ba2d3d68 | 435 | |
Christopher Haster |
7:9a62ba2d3d68 | 436 | #endif |