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);
FuncPtr.h@14:79be4e700cc9, 2016-04-17 (annotated)
- Committer:
- Christopher Haster
- Date:
- Sun Apr 17 21:25:00 2016 -0500
- Revision:
- 14:79be4e700cc9
- Parent:
- 13:4d8a50d4967e
- Child:
- 18:a0fde14b6c39
Removed funcptr namespace
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Christopher Haster |
2:56e1906f7103 | 1 | /* FuncPtr |
Christopher Haster |
2:56e1906f7103 | 2 | * |
Christopher Haster |
0:176c74479de2 | 3 | * Flexible templated function class that avoids dynamic memory |
Christopher Haster |
0:176c74479de2 | 4 | * allocation without limiting functionality |
Christopher Haster |
0:176c74479de2 | 5 | */ |
Christopher Haster |
0:176c74479de2 | 6 | #ifndef FUNCPTR_H |
Christopher Haster |
0:176c74479de2 | 7 | #define FUNCPTR_H |
Christopher Haster |
0:176c74479de2 | 8 | |
Christopher Haster |
0:176c74479de2 | 9 | #include <string.h> |
Christopher Haster |
0:176c74479de2 | 10 | #include <stdint.h> |
Christopher Haster |
0:176c74479de2 | 11 | |
Christopher Haster |
0:176c74479de2 | 12 | |
Christopher Haster |
0:176c74479de2 | 13 | /** FuncPtr class based on template specialization |
Christopher Haster |
0:176c74479de2 | 14 | */ |
Christopher Haster |
0:176c74479de2 | 15 | template <typename F> |
Christopher Haster |
0:176c74479de2 | 16 | class FuncPtr; |
Christopher Haster |
0:176c74479de2 | 17 | |
Christopher Haster |
0:176c74479de2 | 18 | /** Flexible templated function class |
Christopher Haster |
0:176c74479de2 | 19 | */ |
Christopher Haster |
0:176c74479de2 | 20 | template <typename R, typename A0, typename A1, typename A2, typename A3> |
Christopher Haster |
0:176c74479de2 | 21 | class FuncPtr<R(A0, A1, A2, A3)> { |
Christopher Haster |
0:176c74479de2 | 22 | public: |
Christopher Haster |
0:176c74479de2 | 23 | /** Create a FuncPtr with a static function |
Christopher Haster |
0:176c74479de2 | 24 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 25 | */ |
Christopher Haster |
0:176c74479de2 | 26 | FuncPtr(R (*func)(A0, A1, A2, A3) = 0) { |
Christopher Haster |
0:176c74479de2 | 27 | attach(func); |
Christopher Haster |
0:176c74479de2 | 28 | } |
Christopher Haster |
0:176c74479de2 | 29 | |
Christopher Haster |
0:176c74479de2 | 30 | /** Create a FuncPtr with a static function and bound pointer |
Christopher Haster |
0:176c74479de2 | 31 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 32 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 33 | */ |
Christopher Haster |
0:176c74479de2 | 34 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 35 | FuncPtr(T *obj, R (*func)(T*, A0, A1, A2, A3)) { |
Christopher Haster |
0:176c74479de2 | 36 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 37 | } |
Christopher Haster |
0:176c74479de2 | 38 | |
Christopher Haster |
0:176c74479de2 | 39 | /** Create a FuncPtr with a method |
Christopher Haster |
0:176c74479de2 | 40 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 41 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 42 | */ |
Christopher Haster |
0:176c74479de2 | 43 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 44 | FuncPtr(T *obj, R (T::*func)(A0, A1, A2, A3)) { |
Christopher Haster |
0:176c74479de2 | 45 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 46 | } |
Christopher Haster |
0:176c74479de2 | 47 | |
Christopher Haster |
0:176c74479de2 | 48 | /** Create a FuncPtr with a function object |
Christopher Haster |
0:176c74479de2 | 49 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 50 | */ |
Christopher Haster |
0:176c74479de2 | 51 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 52 | FuncPtr(T *obj) { |
Christopher Haster |
0:176c74479de2 | 53 | attach(obj, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 54 | } |
Christopher Haster |
0:176c74479de2 | 55 | |
Christopher Haster |
0:176c74479de2 | 56 | /** Create a FuncPtr with another FuncPtr |
Christopher Haster |
0:176c74479de2 | 57 | * @param func FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 58 | */ |
Christopher Haster |
0:176c74479de2 | 59 | FuncPtr(const FuncPtr<R(A0, A1, A2, A3)> &func) { |
Christopher Haster |
0:176c74479de2 | 60 | attach(func); |
Christopher Haster |
0:176c74479de2 | 61 | } |
Christopher Haster |
0:176c74479de2 | 62 | |
Christopher Haster |
0:176c74479de2 | 63 | /** Attach a static function |
Christopher Haster |
0:176c74479de2 | 64 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 65 | */ |
Christopher Haster |
0:176c74479de2 | 66 | void attach(R (*func)(A0, A1, A2, A3)) { |
Christopher Haster |
0:176c74479de2 | 67 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
6:b5f0551273f6 | 68 | _thunk = func ? &FuncPtr::_staticthunk : 0; |
Christopher Haster |
0:176c74479de2 | 69 | } |
Christopher Haster |
0:176c74479de2 | 70 | |
Christopher Haster |
0:176c74479de2 | 71 | /** Attach a static function with a bound pointer |
Christopher Haster |
0:176c74479de2 | 72 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 73 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 74 | */ |
Christopher Haster |
0:176c74479de2 | 75 | template <typename T> |
Christopher Haster |
0:176c74479de2 | 76 | void attach(T *obj, R (*func)(T*, A0, A1, A2, A3)) { |
Christopher Haster |
0:176c74479de2 | 77 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 78 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 79 | _thunk = &FuncPtr::_boundthunk<T>; |
Christopher Haster |
0:176c74479de2 | 80 | } |
Christopher Haster |
0:176c74479de2 | 81 | |
Christopher Haster |
0:176c74479de2 | 82 | /** Attach a method |
Christopher Haster |
0:176c74479de2 | 83 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 84 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 85 | */ |
Christopher Haster |
0:176c74479de2 | 86 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 87 | void attach(T *obj, R (T::*func)(A0, A1, A2, A3)) { |
Christopher Haster |
0:176c74479de2 | 88 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 89 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 90 | _thunk = &FuncPtr::_methodthunk<T>; |
Christopher Haster |
0:176c74479de2 | 91 | } |
Christopher Haster |
0:176c74479de2 | 92 | |
Christopher Haster |
0:176c74479de2 | 93 | /** Attach a function object |
Christopher Haster |
0:176c74479de2 | 94 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 95 | */ |
Christopher Haster |
0:176c74479de2 | 96 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 97 | void attach(T *func) { |
Christopher Haster |
0:176c74479de2 | 98 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 99 | } |
Christopher Haster |
0:176c74479de2 | 100 | |
Christopher Haster |
0:176c74479de2 | 101 | /** Attach a FuncPtr |
Christopher Haster |
0:176c74479de2 | 102 | * @param func The FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 103 | */ |
Christopher Haster |
0:176c74479de2 | 104 | void attach(const FuncPtr<R(A0, A1, A2, A3)> &func) { |
Christopher Haster |
0:176c74479de2 | 105 | _obj = func._obj; |
Christopher Haster |
0:176c74479de2 | 106 | memcpy(&_func, &func._func, sizeof _func); |
Christopher Haster |
0:176c74479de2 | 107 | _thunk = func._thunk; |
Christopher Haster |
0:176c74479de2 | 108 | } |
Christopher Haster |
0:176c74479de2 | 109 | |
Christopher Haster |
2:56e1906f7103 | 110 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 111 | */ |
Christopher Haster |
0:176c74479de2 | 112 | R call(A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
0:176c74479de2 | 113 | return _thunk(_obj, &_func, a0, a1, a2, a3); |
Christopher Haster |
0:176c74479de2 | 114 | } |
Christopher Haster |
0:176c74479de2 | 115 | |
Christopher Haster |
2:56e1906f7103 | 116 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 117 | */ |
Christopher Haster |
0:176c74479de2 | 118 | R operator()(A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
0:176c74479de2 | 119 | return call(a0, a1, a2, a3); |
Christopher Haster |
0:176c74479de2 | 120 | } |
Christopher Haster |
0:176c74479de2 | 121 | |
Christopher Haster |
0:176c74479de2 | 122 | /** Test if function has been attached |
Christopher Haster |
0:176c74479de2 | 123 | */ |
Christopher Haster |
8:71037a47492d | 124 | operator bool() const { |
Christopher Haster |
6:b5f0551273f6 | 125 | return _thunk; |
Christopher Haster |
0:176c74479de2 | 126 | } |
Christopher Haster |
0:176c74479de2 | 127 | |
Christopher Haster |
1:9c28068feddc | 128 | /** Static thunk for passing as C-style function |
Christopher Haster |
2:56e1906f7103 | 129 | * @param func FuncPtr to call passed as void pointer |
Christopher Haster |
1:9c28068feddc | 130 | */ |
Christopher Haster |
2:56e1906f7103 | 131 | static R thunk(void *func, A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
2:56e1906f7103 | 132 | return static_cast<FuncPtr<R(A0, A1, A2, A3)>*>(func) |
Christopher Haster |
1:9c28068feddc | 133 | ->call(a0, a1, a2, a3); |
Christopher Haster |
1:9c28068feddc | 134 | } |
Christopher Haster |
1:9c28068feddc | 135 | |
Christopher Haster |
0:176c74479de2 | 136 | private: |
Christopher Haster |
0:176c74479de2 | 137 | // Internal thunks for various function types |
Christopher Haster |
0:176c74479de2 | 138 | static R _staticthunk(void*, void *func, A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
0:176c74479de2 | 139 | return (*reinterpret_cast<R (**)(A0, A1, A2, A3)>(func)) |
Christopher Haster |
0:176c74479de2 | 140 | (a0, a1, a2, a3); |
Christopher Haster |
0:176c74479de2 | 141 | } |
Christopher Haster |
0:176c74479de2 | 142 | |
Christopher Haster |
0:176c74479de2 | 143 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 144 | static R _boundthunk(void *obj, void *func, A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
0:176c74479de2 | 145 | return (*reinterpret_cast<R (**)(T*, A0, A1, A2, A3)>(func)) |
Christopher Haster |
0:176c74479de2 | 146 | (static_cast<T*>(obj), a0, a1, a2, a3); |
Christopher Haster |
0:176c74479de2 | 147 | } |
Christopher Haster |
0:176c74479de2 | 148 | |
Christopher Haster |
0:176c74479de2 | 149 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 150 | static R _methodthunk(void *obj, void *func, A0 a0, A1 a1, A2 a2, A3 a3) { |
Christopher Haster |
0:176c74479de2 | 151 | return (static_cast<T*>(obj)->* |
Christopher Haster |
0:176c74479de2 | 152 | (*reinterpret_cast<R (T::**)(A0, A1, A2, A3)>(func))) |
Christopher Haster |
0:176c74479de2 | 153 | (a0, a1, a2, a3); |
Christopher Haster |
0:176c74479de2 | 154 | } |
Christopher Haster |
0:176c74479de2 | 155 | |
Christopher Haster |
0:176c74479de2 | 156 | // Stored as pointer to function and pointer to optional object |
Christopher Haster |
0:176c74479de2 | 157 | // Function pointer is stored as union of possible function types |
Christopher Haster |
0:176c74479de2 | 158 | // to garuntee proper size and alignment |
Christopher Haster |
0:176c74479de2 | 159 | struct _class; |
Christopher Haster |
0:176c74479de2 | 160 | union { |
Christopher Haster |
0:176c74479de2 | 161 | void (*_staticfunc)(); |
Christopher Haster |
0:176c74479de2 | 162 | void (*_boundfunc)(_class *); |
Christopher Haster |
0:176c74479de2 | 163 | void (_class::*_methodfunc)(); |
Christopher Haster |
0:176c74479de2 | 164 | } _func; |
Christopher Haster |
0:176c74479de2 | 165 | |
Christopher Haster |
11:035e0728d927 | 166 | void *_obj; |
Christopher Haster |
11:035e0728d927 | 167 | |
Christopher Haster |
0:176c74479de2 | 168 | // Thunk registered on attach to dispatch calls |
Christopher Haster |
0:176c74479de2 | 169 | R (*_thunk)(void*, void*, A0, A1, A2, A3); |
Christopher Haster |
0:176c74479de2 | 170 | }; |
Christopher Haster |
0:176c74479de2 | 171 | |
Christopher Haster |
0:176c74479de2 | 172 | /** Flexible templated function class |
Christopher Haster |
0:176c74479de2 | 173 | */ |
Christopher Haster |
0:176c74479de2 | 174 | template <typename R, typename A0, typename A1, typename A2> |
Christopher Haster |
0:176c74479de2 | 175 | class FuncPtr<R(A0, A1, A2)> { |
Christopher Haster |
0:176c74479de2 | 176 | public: |
Christopher Haster |
0:176c74479de2 | 177 | /** Create a FuncPtr with a static function |
Christopher Haster |
0:176c74479de2 | 178 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 179 | */ |
Christopher Haster |
0:176c74479de2 | 180 | FuncPtr(R (*func)(A0, A1, A2) = 0) { |
Christopher Haster |
0:176c74479de2 | 181 | attach(func); |
Christopher Haster |
0:176c74479de2 | 182 | } |
Christopher Haster |
0:176c74479de2 | 183 | |
Christopher Haster |
0:176c74479de2 | 184 | /** Create a FuncPtr with a static function and bound pointer |
Christopher Haster |
0:176c74479de2 | 185 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 186 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 187 | */ |
Christopher Haster |
0:176c74479de2 | 188 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 189 | FuncPtr(T *obj, R (*func)(T*, A0, A1, A2)) { |
Christopher Haster |
0:176c74479de2 | 190 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 191 | } |
Christopher Haster |
0:176c74479de2 | 192 | |
Christopher Haster |
0:176c74479de2 | 193 | /** Create a FuncPtr with a method |
Christopher Haster |
0:176c74479de2 | 194 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 195 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 196 | */ |
Christopher Haster |
0:176c74479de2 | 197 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 198 | FuncPtr(T *obj, R (T::*func)(A0, A1, A2)) { |
Christopher Haster |
0:176c74479de2 | 199 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 200 | } |
Christopher Haster |
0:176c74479de2 | 201 | |
Christopher Haster |
0:176c74479de2 | 202 | /** Create a FuncPtr with a function object |
Christopher Haster |
0:176c74479de2 | 203 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 204 | */ |
Christopher Haster |
0:176c74479de2 | 205 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 206 | FuncPtr(T *func) { |
Christopher Haster |
0:176c74479de2 | 207 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 208 | } |
Christopher Haster |
0:176c74479de2 | 209 | |
Christopher Haster |
0:176c74479de2 | 210 | /** Create a FuncPtr with another FuncPtr |
Christopher Haster |
0:176c74479de2 | 211 | * @param func FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 212 | */ |
Christopher Haster |
0:176c74479de2 | 213 | FuncPtr(const FuncPtr<R(A0, A1, A2)> &func) { |
Christopher Haster |
0:176c74479de2 | 214 | attach(func); |
Christopher Haster |
0:176c74479de2 | 215 | } |
Christopher Haster |
0:176c74479de2 | 216 | |
Christopher Haster |
0:176c74479de2 | 217 | /** Attach a static function |
Christopher Haster |
0:176c74479de2 | 218 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 219 | */ |
Christopher Haster |
0:176c74479de2 | 220 | void attach(R (*func)(A0, A1, A2)) { |
Christopher Haster |
0:176c74479de2 | 221 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
6:b5f0551273f6 | 222 | _thunk = func ? &FuncPtr::_staticthunk : 0; |
Christopher Haster |
0:176c74479de2 | 223 | } |
Christopher Haster |
0:176c74479de2 | 224 | |
Christopher Haster |
0:176c74479de2 | 225 | /** Attach a static function with a bound pointer |
Christopher Haster |
0:176c74479de2 | 226 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 227 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 228 | */ |
Christopher Haster |
0:176c74479de2 | 229 | template <typename T> |
Christopher Haster |
0:176c74479de2 | 230 | void attach(T *obj, R (*func)(T*, A0, A1, A2)) { |
Christopher Haster |
0:176c74479de2 | 231 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 232 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 233 | _thunk = &FuncPtr::_boundthunk<T>; |
Christopher Haster |
0:176c74479de2 | 234 | } |
Christopher Haster |
0:176c74479de2 | 235 | |
Christopher Haster |
0:176c74479de2 | 236 | /** Attach a method |
Christopher Haster |
0:176c74479de2 | 237 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 238 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 239 | */ |
Christopher Haster |
0:176c74479de2 | 240 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 241 | void attach(T *obj, R (T::*func)(A0, A1, A2)) { |
Christopher Haster |
0:176c74479de2 | 242 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 243 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 244 | _thunk = &FuncPtr::_methodthunk<T>; |
Christopher Haster |
0:176c74479de2 | 245 | } |
Christopher Haster |
0:176c74479de2 | 246 | |
Christopher Haster |
0:176c74479de2 | 247 | /** Attach a function object |
Christopher Haster |
0:176c74479de2 | 248 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 249 | */ |
Christopher Haster |
0:176c74479de2 | 250 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 251 | void attach(T *func) { |
Christopher Haster |
0:176c74479de2 | 252 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 253 | } |
Christopher Haster |
0:176c74479de2 | 254 | |
Christopher Haster |
0:176c74479de2 | 255 | /** Attach a FuncPtr |
Christopher Haster |
0:176c74479de2 | 256 | * @param func The FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 257 | */ |
Christopher Haster |
0:176c74479de2 | 258 | void attach(const FuncPtr<R(A0, A1, A2)> &func) { |
Christopher Haster |
0:176c74479de2 | 259 | _obj = func._obj; |
Christopher Haster |
0:176c74479de2 | 260 | memcpy(&_func, &func._func, sizeof _func); |
Christopher Haster |
0:176c74479de2 | 261 | _thunk = func._thunk; |
Christopher Haster |
0:176c74479de2 | 262 | } |
Christopher Haster |
0:176c74479de2 | 263 | |
Christopher Haster |
2:56e1906f7103 | 264 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 265 | */ |
Christopher Haster |
0:176c74479de2 | 266 | R call(A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
0:176c74479de2 | 267 | return _thunk(_obj, &_func, a0, a1, a2); |
Christopher Haster |
0:176c74479de2 | 268 | } |
Christopher Haster |
0:176c74479de2 | 269 | |
Christopher Haster |
2:56e1906f7103 | 270 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 271 | */ |
Christopher Haster |
0:176c74479de2 | 272 | R operator()(A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
0:176c74479de2 | 273 | return call(a0, a1, a2); |
Christopher Haster |
0:176c74479de2 | 274 | } |
Christopher Haster |
0:176c74479de2 | 275 | |
Christopher Haster |
0:176c74479de2 | 276 | /** Test if function has been attached |
Christopher Haster |
0:176c74479de2 | 277 | */ |
Christopher Haster |
8:71037a47492d | 278 | operator bool() const { |
Christopher Haster |
6:b5f0551273f6 | 279 | return _thunk; |
Christopher Haster |
0:176c74479de2 | 280 | } |
Christopher Haster |
0:176c74479de2 | 281 | |
Christopher Haster |
1:9c28068feddc | 282 | /** Static thunk for passing as C-style function |
Christopher Haster |
2:56e1906f7103 | 283 | * @param func FuncPtr to call passed as void pointer |
Christopher Haster |
1:9c28068feddc | 284 | */ |
Christopher Haster |
2:56e1906f7103 | 285 | static R thunk(void *func, A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
2:56e1906f7103 | 286 | return static_cast<FuncPtr<R(A0, A1, A2)>*>(func) |
Christopher Haster |
1:9c28068feddc | 287 | ->call(a0, a1, a2); |
Christopher Haster |
1:9c28068feddc | 288 | } |
Christopher Haster |
1:9c28068feddc | 289 | |
Christopher Haster |
0:176c74479de2 | 290 | private: |
Christopher Haster |
0:176c74479de2 | 291 | // Internal thunks for various function types |
Christopher Haster |
0:176c74479de2 | 292 | static R _staticthunk(void*, void *func, A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
0:176c74479de2 | 293 | return (*reinterpret_cast<R (**)(A0, A1, A2)>(func)) |
Christopher Haster |
0:176c74479de2 | 294 | (a0, a1, a2); |
Christopher Haster |
0:176c74479de2 | 295 | } |
Christopher Haster |
0:176c74479de2 | 296 | |
Christopher Haster |
0:176c74479de2 | 297 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 298 | static R _boundthunk(void *obj, void *func, A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
0:176c74479de2 | 299 | return (*reinterpret_cast<R (**)(T*, A0, A1, A2)>(func)) |
Christopher Haster |
0:176c74479de2 | 300 | (static_cast<T*>(obj), a0, a1, a2); |
Christopher Haster |
0:176c74479de2 | 301 | } |
Christopher Haster |
0:176c74479de2 | 302 | |
Christopher Haster |
0:176c74479de2 | 303 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 304 | static R _methodthunk(void *obj, void *func, A0 a0, A1 a1, A2 a2) { |
Christopher Haster |
0:176c74479de2 | 305 | return (static_cast<T*>(obj)->* |
Christopher Haster |
0:176c74479de2 | 306 | (*reinterpret_cast<R (T::**)(A0, A1, A2)>(func))) |
Christopher Haster |
0:176c74479de2 | 307 | (a0, a1, a2); |
Christopher Haster |
0:176c74479de2 | 308 | } |
Christopher Haster |
0:176c74479de2 | 309 | |
Christopher Haster |
0:176c74479de2 | 310 | // Stored as pointer to function and pointer to optional object |
Christopher Haster |
0:176c74479de2 | 311 | // Function pointer is stored as union of possible function types |
Christopher Haster |
0:176c74479de2 | 312 | // to garuntee proper size and alignment |
Christopher Haster |
0:176c74479de2 | 313 | struct _class; |
Christopher Haster |
0:176c74479de2 | 314 | union { |
Christopher Haster |
0:176c74479de2 | 315 | void (*_staticfunc)(); |
Christopher Haster |
0:176c74479de2 | 316 | void (*_boundfunc)(_class *); |
Christopher Haster |
0:176c74479de2 | 317 | void (_class::*_methodfunc)(); |
Christopher Haster |
0:176c74479de2 | 318 | } _func; |
Christopher Haster |
0:176c74479de2 | 319 | |
Christopher Haster |
11:035e0728d927 | 320 | void *_obj; |
Christopher Haster |
11:035e0728d927 | 321 | |
Christopher Haster |
0:176c74479de2 | 322 | // Thunk registered on attach to dispatch calls |
Christopher Haster |
0:176c74479de2 | 323 | R (*_thunk)(void*, void*, A0, A1, A2); |
Christopher Haster |
0:176c74479de2 | 324 | }; |
Christopher Haster |
0:176c74479de2 | 325 | |
Christopher Haster |
0:176c74479de2 | 326 | /** Flexible templated function class |
Christopher Haster |
0:176c74479de2 | 327 | */ |
Christopher Haster |
0:176c74479de2 | 328 | template <typename R, typename A0, typename A1> |
Christopher Haster |
0:176c74479de2 | 329 | class FuncPtr<R(A0, A1)> { |
Christopher Haster |
0:176c74479de2 | 330 | public: |
Christopher Haster |
0:176c74479de2 | 331 | /** Create a FuncPtr with a static function |
Christopher Haster |
0:176c74479de2 | 332 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 333 | */ |
Christopher Haster |
0:176c74479de2 | 334 | FuncPtr(R (*func)(A0, A1) = 0) { |
Christopher Haster |
0:176c74479de2 | 335 | attach(func); |
Christopher Haster |
0:176c74479de2 | 336 | } |
Christopher Haster |
0:176c74479de2 | 337 | |
Christopher Haster |
0:176c74479de2 | 338 | /** Create a FuncPtr with a static function and bound pointer |
Christopher Haster |
0:176c74479de2 | 339 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 340 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 341 | */ |
Christopher Haster |
0:176c74479de2 | 342 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 343 | FuncPtr(T *obj, R (*func)(T*, A0, A1)) { |
Christopher Haster |
0:176c74479de2 | 344 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 345 | } |
Christopher Haster |
0:176c74479de2 | 346 | |
Christopher Haster |
0:176c74479de2 | 347 | /** Create a FuncPtr with a method |
Christopher Haster |
0:176c74479de2 | 348 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 349 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 350 | */ |
Christopher Haster |
0:176c74479de2 | 351 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 352 | FuncPtr(T *obj, R (T::*func)(A0, A1)) { |
Christopher Haster |
0:176c74479de2 | 353 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 354 | } |
Christopher Haster |
0:176c74479de2 | 355 | |
Christopher Haster |
0:176c74479de2 | 356 | /** Create a FuncPtr with a function object |
Christopher Haster |
0:176c74479de2 | 357 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 358 | */ |
Christopher Haster |
0:176c74479de2 | 359 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 360 | FuncPtr(T *func) { |
Christopher Haster |
0:176c74479de2 | 361 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 362 | } |
Christopher Haster |
0:176c74479de2 | 363 | |
Christopher Haster |
0:176c74479de2 | 364 | /** Create a FuncPtr with another FuncPtr |
Christopher Haster |
0:176c74479de2 | 365 | * @param func FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 366 | */ |
Christopher Haster |
0:176c74479de2 | 367 | FuncPtr(const FuncPtr<R(A0, A1)> &func) { |
Christopher Haster |
0:176c74479de2 | 368 | attach(func); |
Christopher Haster |
0:176c74479de2 | 369 | } |
Christopher Haster |
0:176c74479de2 | 370 | |
Christopher Haster |
0:176c74479de2 | 371 | /** Attach a static function |
Christopher Haster |
0:176c74479de2 | 372 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 373 | */ |
Christopher Haster |
0:176c74479de2 | 374 | void attach(R (*func)(A0, A1)) { |
Christopher Haster |
0:176c74479de2 | 375 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
6:b5f0551273f6 | 376 | _thunk = func ? &FuncPtr::_staticthunk : 0; |
Christopher Haster |
0:176c74479de2 | 377 | } |
Christopher Haster |
0:176c74479de2 | 378 | |
Christopher Haster |
0:176c74479de2 | 379 | /** Attach a static function with a bound pointer |
Christopher Haster |
0:176c74479de2 | 380 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 381 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 382 | */ |
Christopher Haster |
0:176c74479de2 | 383 | template <typename T> |
Christopher Haster |
0:176c74479de2 | 384 | void attach(T *obj, R (*func)(T*, A0, A1)) { |
Christopher Haster |
0:176c74479de2 | 385 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 386 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 387 | _thunk = &FuncPtr::_boundthunk<T>; |
Christopher Haster |
0:176c74479de2 | 388 | } |
Christopher Haster |
0:176c74479de2 | 389 | |
Christopher Haster |
0:176c74479de2 | 390 | /** Attach a method |
Christopher Haster |
0:176c74479de2 | 391 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 392 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 393 | */ |
Christopher Haster |
0:176c74479de2 | 394 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 395 | void attach(T *obj, R (T::*func)(A0, A1)) { |
Christopher Haster |
0:176c74479de2 | 396 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 397 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 398 | _thunk = &FuncPtr::_methodthunk<T>; |
Christopher Haster |
0:176c74479de2 | 399 | } |
Christopher Haster |
0:176c74479de2 | 400 | |
Christopher Haster |
0:176c74479de2 | 401 | /** Attach a function object |
Christopher Haster |
0:176c74479de2 | 402 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 403 | */ |
Christopher Haster |
0:176c74479de2 | 404 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 405 | void attach(T *func) { |
Christopher Haster |
0:176c74479de2 | 406 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 407 | } |
Christopher Haster |
0:176c74479de2 | 408 | |
Christopher Haster |
0:176c74479de2 | 409 | /** Attach a FuncPtr |
Christopher Haster |
0:176c74479de2 | 410 | * @param func The FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 411 | */ |
Christopher Haster |
0:176c74479de2 | 412 | void attach(const FuncPtr<R(A0, A1)> &func) { |
Christopher Haster |
0:176c74479de2 | 413 | _obj = func._obj; |
Christopher Haster |
0:176c74479de2 | 414 | memcpy(&_func, &func._func, sizeof _func); |
Christopher Haster |
0:176c74479de2 | 415 | _thunk = func._thunk; |
Christopher Haster |
0:176c74479de2 | 416 | } |
Christopher Haster |
0:176c74479de2 | 417 | |
Christopher Haster |
2:56e1906f7103 | 418 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 419 | */ |
Christopher Haster |
0:176c74479de2 | 420 | R call(A0 a0, A1 a1) { |
Christopher Haster |
0:176c74479de2 | 421 | return _thunk(_obj, &_func, a0, a1); |
Christopher Haster |
0:176c74479de2 | 422 | } |
Christopher Haster |
0:176c74479de2 | 423 | |
Christopher Haster |
2:56e1906f7103 | 424 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 425 | */ |
Christopher Haster |
0:176c74479de2 | 426 | R operator()(A0 a0, A1 a1) { |
Christopher Haster |
0:176c74479de2 | 427 | return call(a0, a1); |
Christopher Haster |
0:176c74479de2 | 428 | } |
Christopher Haster |
0:176c74479de2 | 429 | |
Christopher Haster |
0:176c74479de2 | 430 | /** Test if function has been attached |
Christopher Haster |
0:176c74479de2 | 431 | */ |
Christopher Haster |
8:71037a47492d | 432 | operator bool() const { |
Christopher Haster |
6:b5f0551273f6 | 433 | return _thunk; |
Christopher Haster |
0:176c74479de2 | 434 | } |
Christopher Haster |
0:176c74479de2 | 435 | |
Christopher Haster |
1:9c28068feddc | 436 | /** Static thunk for passing as C-style function |
Christopher Haster |
2:56e1906f7103 | 437 | * @param func FuncPtr to call passed as void pointer |
Christopher Haster |
1:9c28068feddc | 438 | */ |
Christopher Haster |
2:56e1906f7103 | 439 | static R thunk(void *func, A0 a0, A1 a1) { |
Christopher Haster |
2:56e1906f7103 | 440 | return static_cast<FuncPtr<R(A0, A1)>*>(func) |
Christopher Haster |
1:9c28068feddc | 441 | ->call(a0, a1); |
Christopher Haster |
1:9c28068feddc | 442 | } |
Christopher Haster |
1:9c28068feddc | 443 | |
Christopher Haster |
0:176c74479de2 | 444 | private: |
Christopher Haster |
0:176c74479de2 | 445 | // Internal thunks for various function types |
Christopher Haster |
0:176c74479de2 | 446 | static R _staticthunk(void*, void *func, A0 a0, A1 a1) { |
Christopher Haster |
0:176c74479de2 | 447 | return (*reinterpret_cast<R (**)(A0, A1)>(func)) |
Christopher Haster |
0:176c74479de2 | 448 | (a0, a1); |
Christopher Haster |
0:176c74479de2 | 449 | } |
Christopher Haster |
0:176c74479de2 | 450 | |
Christopher Haster |
0:176c74479de2 | 451 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 452 | static R _boundthunk(void *obj, void *func, A0 a0, A1 a1) { |
Christopher Haster |
0:176c74479de2 | 453 | return (*reinterpret_cast<R (**)(T*, A0, A1)>(func)) |
Christopher Haster |
0:176c74479de2 | 454 | (static_cast<T*>(obj), a0, a1); |
Christopher Haster |
0:176c74479de2 | 455 | } |
Christopher Haster |
0:176c74479de2 | 456 | |
Christopher Haster |
0:176c74479de2 | 457 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 458 | static R _methodthunk(void *obj, void *func, A0 a0, A1 a1) { |
Christopher Haster |
0:176c74479de2 | 459 | return (static_cast<T*>(obj)->* |
Christopher Haster |
0:176c74479de2 | 460 | (*reinterpret_cast<R (T::**)(A0, A1)>(func))) |
Christopher Haster |
0:176c74479de2 | 461 | (a0, a1); |
Christopher Haster |
0:176c74479de2 | 462 | } |
Christopher Haster |
0:176c74479de2 | 463 | |
Christopher Haster |
0:176c74479de2 | 464 | // Stored as pointer to function and pointer to optional object |
Christopher Haster |
0:176c74479de2 | 465 | // Function pointer is stored as union of possible function types |
Christopher Haster |
0:176c74479de2 | 466 | // to garuntee proper size and alignment |
Christopher Haster |
0:176c74479de2 | 467 | struct _class; |
Christopher Haster |
0:176c74479de2 | 468 | union { |
Christopher Haster |
0:176c74479de2 | 469 | void (*_staticfunc)(); |
Christopher Haster |
0:176c74479de2 | 470 | void (*_boundfunc)(_class *); |
Christopher Haster |
0:176c74479de2 | 471 | void (_class::*_methodfunc)(); |
Christopher Haster |
0:176c74479de2 | 472 | } _func; |
Christopher Haster |
0:176c74479de2 | 473 | |
Christopher Haster |
11:035e0728d927 | 474 | void *_obj; |
Christopher Haster |
11:035e0728d927 | 475 | |
Christopher Haster |
0:176c74479de2 | 476 | // Thunk registered on attach to dispatch calls |
Christopher Haster |
0:176c74479de2 | 477 | R (*_thunk)(void*, void*, A0, A1); |
Christopher Haster |
0:176c74479de2 | 478 | }; |
Christopher Haster |
0:176c74479de2 | 479 | |
Christopher Haster |
0:176c74479de2 | 480 | /** Flexible templated function class |
Christopher Haster |
0:176c74479de2 | 481 | */ |
Christopher Haster |
0:176c74479de2 | 482 | template <typename R, typename A0> |
Christopher Haster |
0:176c74479de2 | 483 | class FuncPtr<R(A0)> { |
Christopher Haster |
0:176c74479de2 | 484 | public: |
Christopher Haster |
0:176c74479de2 | 485 | /** Create a FuncPtr with a static function |
Christopher Haster |
0:176c74479de2 | 486 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 487 | */ |
Christopher Haster |
0:176c74479de2 | 488 | FuncPtr(R (*func)(A0) = 0) { |
Christopher Haster |
0:176c74479de2 | 489 | attach(func); |
Christopher Haster |
0:176c74479de2 | 490 | } |
Christopher Haster |
0:176c74479de2 | 491 | |
Christopher Haster |
0:176c74479de2 | 492 | /** Create a FuncPtr with a static function and bound pointer |
Christopher Haster |
0:176c74479de2 | 493 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 494 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 495 | */ |
Christopher Haster |
0:176c74479de2 | 496 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 497 | FuncPtr(T *obj, R (*func)(T*, A0)) { |
Christopher Haster |
0:176c74479de2 | 498 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 499 | } |
Christopher Haster |
0:176c74479de2 | 500 | |
Christopher Haster |
0:176c74479de2 | 501 | /** Create a FuncPtr with a method |
Christopher Haster |
0:176c74479de2 | 502 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 503 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 504 | */ |
Christopher Haster |
0:176c74479de2 | 505 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 506 | FuncPtr(T *obj, R (T::*func)(A0)) { |
Christopher Haster |
0:176c74479de2 | 507 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 508 | } |
Christopher Haster |
0:176c74479de2 | 509 | |
Christopher Haster |
0:176c74479de2 | 510 | /** Create a FuncPtr with a function object |
Christopher Haster |
0:176c74479de2 | 511 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 512 | */ |
Christopher Haster |
0:176c74479de2 | 513 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 514 | FuncPtr(T *func) { |
Christopher Haster |
0:176c74479de2 | 515 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 516 | } |
Christopher Haster |
0:176c74479de2 | 517 | |
Christopher Haster |
0:176c74479de2 | 518 | /** Create a FuncPtr with another FuncPtr |
Christopher Haster |
0:176c74479de2 | 519 | * @param func FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 520 | */ |
Christopher Haster |
0:176c74479de2 | 521 | FuncPtr(const FuncPtr<R(A0)> &func) { |
Christopher Haster |
0:176c74479de2 | 522 | attach(func); |
Christopher Haster |
0:176c74479de2 | 523 | } |
Christopher Haster |
0:176c74479de2 | 524 | |
Christopher Haster |
0:176c74479de2 | 525 | /** Attach a static function |
Christopher Haster |
0:176c74479de2 | 526 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 527 | */ |
Christopher Haster |
0:176c74479de2 | 528 | void attach(R (*func)(A0)) { |
Christopher Haster |
0:176c74479de2 | 529 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
6:b5f0551273f6 | 530 | _thunk = func ? &FuncPtr::_staticthunk : 0; |
Christopher Haster |
0:176c74479de2 | 531 | } |
Christopher Haster |
0:176c74479de2 | 532 | |
Christopher Haster |
0:176c74479de2 | 533 | /** Attach a static function with a bound pointer |
Christopher Haster |
0:176c74479de2 | 534 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 535 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 536 | */ |
Christopher Haster |
0:176c74479de2 | 537 | template <typename T> |
Christopher Haster |
0:176c74479de2 | 538 | void attach(T *obj, R (*func)(T*, A0)) { |
Christopher Haster |
0:176c74479de2 | 539 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 540 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 541 | _thunk = &FuncPtr::_boundthunk<T>; |
Christopher Haster |
0:176c74479de2 | 542 | } |
Christopher Haster |
0:176c74479de2 | 543 | |
Christopher Haster |
0:176c74479de2 | 544 | /** Attach a method |
Christopher Haster |
0:176c74479de2 | 545 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 546 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 547 | */ |
Christopher Haster |
0:176c74479de2 | 548 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 549 | void attach(T *obj, R (T::*func)(A0)) { |
Christopher Haster |
0:176c74479de2 | 550 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 551 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 552 | _thunk = &FuncPtr::_methodthunk<T>; |
Christopher Haster |
0:176c74479de2 | 553 | } |
Christopher Haster |
0:176c74479de2 | 554 | |
Christopher Haster |
0:176c74479de2 | 555 | /** Attach a function object |
Christopher Haster |
0:176c74479de2 | 556 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 557 | */ |
Christopher Haster |
0:176c74479de2 | 558 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 559 | void attach(T *func) { |
Christopher Haster |
0:176c74479de2 | 560 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 561 | } |
Christopher Haster |
0:176c74479de2 | 562 | |
Christopher Haster |
0:176c74479de2 | 563 | /** Attach a FuncPtr |
Christopher Haster |
0:176c74479de2 | 564 | * @param func The FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 565 | */ |
Christopher Haster |
0:176c74479de2 | 566 | void attach(const FuncPtr<R(A0)> &func) { |
Christopher Haster |
0:176c74479de2 | 567 | _obj = func._obj; |
Christopher Haster |
0:176c74479de2 | 568 | memcpy(&_func, &func._func, sizeof _func); |
Christopher Haster |
0:176c74479de2 | 569 | _thunk = func._thunk; |
Christopher Haster |
0:176c74479de2 | 570 | } |
Christopher Haster |
0:176c74479de2 | 571 | |
Christopher Haster |
2:56e1906f7103 | 572 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 573 | */ |
Christopher Haster |
0:176c74479de2 | 574 | R call(A0 a0) { |
Christopher Haster |
0:176c74479de2 | 575 | return _thunk(_obj, &_func, a0); |
Christopher Haster |
0:176c74479de2 | 576 | } |
Christopher Haster |
0:176c74479de2 | 577 | |
Christopher Haster |
2:56e1906f7103 | 578 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 579 | */ |
Christopher Haster |
0:176c74479de2 | 580 | R operator()(A0 a0) { |
Christopher Haster |
0:176c74479de2 | 581 | return call(a0); |
Christopher Haster |
0:176c74479de2 | 582 | } |
Christopher Haster |
0:176c74479de2 | 583 | |
Christopher Haster |
0:176c74479de2 | 584 | /** Test if function has been attached |
Christopher Haster |
0:176c74479de2 | 585 | */ |
Christopher Haster |
8:71037a47492d | 586 | operator bool() const { |
Christopher Haster |
6:b5f0551273f6 | 587 | return _thunk; |
Christopher Haster |
0:176c74479de2 | 588 | } |
Christopher Haster |
0:176c74479de2 | 589 | |
Christopher Haster |
1:9c28068feddc | 590 | /** Static thunk for passing as C-style function |
Christopher Haster |
2:56e1906f7103 | 591 | * @param func FuncPtr to call passed as void pointer |
Christopher Haster |
1:9c28068feddc | 592 | */ |
Christopher Haster |
2:56e1906f7103 | 593 | static R thunk(void *func, A0 a0) { |
Christopher Haster |
2:56e1906f7103 | 594 | return static_cast<FuncPtr<R(A0)>*>(func) |
Christopher Haster |
1:9c28068feddc | 595 | ->call(a0); |
Christopher Haster |
1:9c28068feddc | 596 | } |
Christopher Haster |
1:9c28068feddc | 597 | |
Christopher Haster |
0:176c74479de2 | 598 | private: |
Christopher Haster |
0:176c74479de2 | 599 | // Internal thunks for various function types |
Christopher Haster |
0:176c74479de2 | 600 | static R _staticthunk(void*, void *func, A0 a0) { |
Christopher Haster |
0:176c74479de2 | 601 | return (*reinterpret_cast<R (**)(A0)>(func)) |
Christopher Haster |
0:176c74479de2 | 602 | (a0); |
Christopher Haster |
0:176c74479de2 | 603 | } |
Christopher Haster |
0:176c74479de2 | 604 | |
Christopher Haster |
0:176c74479de2 | 605 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 606 | static R _boundthunk(void *obj, void *func, A0 a0) { |
Christopher Haster |
0:176c74479de2 | 607 | return (*reinterpret_cast<R (**)(T*, A0)>(func)) |
Christopher Haster |
0:176c74479de2 | 608 | (static_cast<T*>(obj), a0); |
Christopher Haster |
0:176c74479de2 | 609 | } |
Christopher Haster |
0:176c74479de2 | 610 | |
Christopher Haster |
0:176c74479de2 | 611 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 612 | static R _methodthunk(void *obj, void *func, A0 a0) { |
Christopher Haster |
0:176c74479de2 | 613 | return (static_cast<T*>(obj)->* |
Christopher Haster |
0:176c74479de2 | 614 | (*reinterpret_cast<R (T::**)(A0)>(func))) |
Christopher Haster |
0:176c74479de2 | 615 | (a0); |
Christopher Haster |
0:176c74479de2 | 616 | } |
Christopher Haster |
0:176c74479de2 | 617 | |
Christopher Haster |
0:176c74479de2 | 618 | // Stored as pointer to function and pointer to optional object |
Christopher Haster |
0:176c74479de2 | 619 | // Function pointer is stored as union of possible function types |
Christopher Haster |
0:176c74479de2 | 620 | // to garuntee proper size and alignment |
Christopher Haster |
0:176c74479de2 | 621 | struct _class; |
Christopher Haster |
0:176c74479de2 | 622 | union { |
Christopher Haster |
0:176c74479de2 | 623 | void (*_staticfunc)(); |
Christopher Haster |
0:176c74479de2 | 624 | void (*_boundfunc)(_class *); |
Christopher Haster |
0:176c74479de2 | 625 | void (_class::*_methodfunc)(); |
Christopher Haster |
0:176c74479de2 | 626 | } _func; |
Christopher Haster |
0:176c74479de2 | 627 | |
Christopher Haster |
11:035e0728d927 | 628 | void *_obj; |
Christopher Haster |
11:035e0728d927 | 629 | |
Christopher Haster |
0:176c74479de2 | 630 | // Thunk registered on attach to dispatch calls |
Christopher Haster |
0:176c74479de2 | 631 | R (*_thunk)(void*, void*, A0); |
Christopher Haster |
0:176c74479de2 | 632 | }; |
Christopher Haster |
0:176c74479de2 | 633 | |
Christopher Haster |
0:176c74479de2 | 634 | /** Flexible templated function class |
Christopher Haster |
0:176c74479de2 | 635 | */ |
Christopher Haster |
0:176c74479de2 | 636 | template <typename R> |
Christopher Haster |
0:176c74479de2 | 637 | class FuncPtr<R()> { |
Christopher Haster |
0:176c74479de2 | 638 | public: |
Christopher Haster |
0:176c74479de2 | 639 | /** Create a FuncPtr with a static function |
Christopher Haster |
0:176c74479de2 | 640 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 641 | */ |
Christopher Haster |
0:176c74479de2 | 642 | FuncPtr(R (*func)() = 0) { |
Christopher Haster |
0:176c74479de2 | 643 | attach(func); |
Christopher Haster |
0:176c74479de2 | 644 | } |
Christopher Haster |
0:176c74479de2 | 645 | |
Christopher Haster |
0:176c74479de2 | 646 | /** Create a FuncPtr with a static function and bound pointer |
Christopher Haster |
0:176c74479de2 | 647 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 648 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 649 | */ |
Christopher Haster |
0:176c74479de2 | 650 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 651 | FuncPtr(T *obj, R (*func)(T*)) { |
Christopher Haster |
0:176c74479de2 | 652 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 653 | } |
Christopher Haster |
0:176c74479de2 | 654 | |
Christopher Haster |
0:176c74479de2 | 655 | /** Create a FuncPtr with a method |
Christopher Haster |
0:176c74479de2 | 656 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 657 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 658 | */ |
Christopher Haster |
0:176c74479de2 | 659 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 660 | FuncPtr(T *obj, R (T::*func)()) { |
Christopher Haster |
0:176c74479de2 | 661 | attach(obj, func); |
Christopher Haster |
0:176c74479de2 | 662 | } |
Christopher Haster |
0:176c74479de2 | 663 | |
Christopher Haster |
0:176c74479de2 | 664 | /** Create a FuncPtr with a function object |
Christopher Haster |
0:176c74479de2 | 665 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 666 | */ |
Christopher Haster |
0:176c74479de2 | 667 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 668 | FuncPtr(T *func) { |
Christopher Haster |
0:176c74479de2 | 669 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 670 | } |
Christopher Haster |
0:176c74479de2 | 671 | |
Christopher Haster |
0:176c74479de2 | 672 | /** Create a FuncPtr with another FuncPtr |
Christopher Haster |
0:176c74479de2 | 673 | * @param func FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 674 | */ |
Christopher Haster |
0:176c74479de2 | 675 | FuncPtr(const FuncPtr<R()> &func) { |
Christopher Haster |
0:176c74479de2 | 676 | attach(func); |
Christopher Haster |
0:176c74479de2 | 677 | } |
Christopher Haster |
0:176c74479de2 | 678 | |
Christopher Haster |
0:176c74479de2 | 679 | /** Attach a static function |
Christopher Haster |
0:176c74479de2 | 680 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 681 | */ |
Christopher Haster |
0:176c74479de2 | 682 | void attach(R (*func)()) { |
Christopher Haster |
0:176c74479de2 | 683 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
6:b5f0551273f6 | 684 | _thunk = func ? &FuncPtr::_staticthunk : 0; |
Christopher Haster |
0:176c74479de2 | 685 | } |
Christopher Haster |
0:176c74479de2 | 686 | |
Christopher Haster |
0:176c74479de2 | 687 | /** Attach a static function with a bound pointer |
Christopher Haster |
0:176c74479de2 | 688 | * @param obj Pointer to object to bind to function |
Christopher Haster |
0:176c74479de2 | 689 | * @param func Static function to attach |
Christopher Haster |
0:176c74479de2 | 690 | */ |
Christopher Haster |
0:176c74479de2 | 691 | template <typename T> |
Christopher Haster |
0:176c74479de2 | 692 | void attach(T *obj, R (*func)(T*)) { |
Christopher Haster |
0:176c74479de2 | 693 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 694 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 695 | _thunk = &FuncPtr::_boundthunk<T>; |
Christopher Haster |
0:176c74479de2 | 696 | } |
Christopher Haster |
0:176c74479de2 | 697 | |
Christopher Haster |
0:176c74479de2 | 698 | /** Attach a method |
Christopher Haster |
0:176c74479de2 | 699 | * @param obj Pointer to object to invoke method on |
Christopher Haster |
0:176c74479de2 | 700 | * @param func Method to attach |
Christopher Haster |
0:176c74479de2 | 701 | */ |
Christopher Haster |
0:176c74479de2 | 702 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 703 | void attach(T *obj, R (T::*func)()) { |
Christopher Haster |
0:176c74479de2 | 704 | _obj = static_cast<void*>(obj); |
Christopher Haster |
0:176c74479de2 | 705 | memcpy(&_func, &func, sizeof func); |
Christopher Haster |
0:176c74479de2 | 706 | _thunk = &FuncPtr::_methodthunk<T>; |
Christopher Haster |
0:176c74479de2 | 707 | } |
Christopher Haster |
0:176c74479de2 | 708 | |
Christopher Haster |
0:176c74479de2 | 709 | /** Attach a function object |
Christopher Haster |
0:176c74479de2 | 710 | * @param func Function object to attach |
Christopher Haster |
0:176c74479de2 | 711 | */ |
Christopher Haster |
0:176c74479de2 | 712 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 713 | void attach(T *func) { |
Christopher Haster |
0:176c74479de2 | 714 | attach(func, &T::operator()); |
Christopher Haster |
0:176c74479de2 | 715 | } |
Christopher Haster |
0:176c74479de2 | 716 | |
Christopher Haster |
0:176c74479de2 | 717 | /** Attach a FuncPtr |
Christopher Haster |
0:176c74479de2 | 718 | * @param func The FuncPtr to attach |
Christopher Haster |
0:176c74479de2 | 719 | */ |
Christopher Haster |
0:176c74479de2 | 720 | void attach(const FuncPtr<R()> &func) { |
Christopher Haster |
0:176c74479de2 | 721 | _obj = func._obj; |
Christopher Haster |
0:176c74479de2 | 722 | memcpy(&_func, &func._func, sizeof _func); |
Christopher Haster |
0:176c74479de2 | 723 | _thunk = func._thunk; |
Christopher Haster |
0:176c74479de2 | 724 | } |
Christopher Haster |
0:176c74479de2 | 725 | |
Christopher Haster |
2:56e1906f7103 | 726 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 727 | */ |
Christopher Haster |
0:176c74479de2 | 728 | R call() { |
Christopher Haster |
0:176c74479de2 | 729 | return _thunk(_obj, &_func); |
Christopher Haster |
0:176c74479de2 | 730 | } |
Christopher Haster |
0:176c74479de2 | 731 | |
Christopher Haster |
2:56e1906f7103 | 732 | /** Call the attached function |
Christopher Haster |
0:176c74479de2 | 733 | */ |
Christopher Haster |
0:176c74479de2 | 734 | R operator()() { |
Christopher Haster |
0:176c74479de2 | 735 | return call(); |
Christopher Haster |
0:176c74479de2 | 736 | } |
Christopher Haster |
0:176c74479de2 | 737 | |
Christopher Haster |
0:176c74479de2 | 738 | /** Test if function has been attached |
Christopher Haster |
0:176c74479de2 | 739 | */ |
Christopher Haster |
8:71037a47492d | 740 | operator bool() const { |
Christopher Haster |
6:b5f0551273f6 | 741 | return _thunk; |
Christopher Haster |
0:176c74479de2 | 742 | } |
Christopher Haster |
0:176c74479de2 | 743 | |
Christopher Haster |
1:9c28068feddc | 744 | /** Static thunk for passing as C-style function |
Christopher Haster |
2:56e1906f7103 | 745 | * @param func FuncPtr to call passed as void pointer |
Christopher Haster |
1:9c28068feddc | 746 | */ |
Christopher Haster |
2:56e1906f7103 | 747 | static R thunk(void *func) { |
Christopher Haster |
2:56e1906f7103 | 748 | return static_cast<FuncPtr<R()>*>(func) |
Christopher Haster |
1:9c28068feddc | 749 | ->call(); |
Christopher Haster |
1:9c28068feddc | 750 | } |
Christopher Haster |
1:9c28068feddc | 751 | |
Christopher Haster |
0:176c74479de2 | 752 | private: |
Christopher Haster |
0:176c74479de2 | 753 | // Internal thunks for various function types |
Christopher Haster |
0:176c74479de2 | 754 | static R _staticthunk(void*, void *func) { |
Christopher Haster |
0:176c74479de2 | 755 | return (*reinterpret_cast<R (**)()>(func)) |
Christopher Haster |
0:176c74479de2 | 756 | (); |
Christopher Haster |
0:176c74479de2 | 757 | } |
Christopher Haster |
0:176c74479de2 | 758 | |
Christopher Haster |
0:176c74479de2 | 759 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 760 | static R _boundthunk(void *obj, void *func) { |
Christopher Haster |
0:176c74479de2 | 761 | return (*reinterpret_cast<R (**)(T*)>(func)) |
Christopher Haster |
0:176c74479de2 | 762 | (static_cast<T*>(obj)); |
Christopher Haster |
0:176c74479de2 | 763 | } |
Christopher Haster |
0:176c74479de2 | 764 | |
Christopher Haster |
0:176c74479de2 | 765 | template<typename T> |
Christopher Haster |
0:176c74479de2 | 766 | static R _methodthunk(void *obj, void *func) { |
Christopher Haster |
0:176c74479de2 | 767 | return (static_cast<T*>(obj)->* |
Christopher Haster |
0:176c74479de2 | 768 | (*reinterpret_cast<R (T::**)()>(func))) |
Christopher Haster |
0:176c74479de2 | 769 | (); |
Christopher Haster |
0:176c74479de2 | 770 | } |
Christopher Haster |
0:176c74479de2 | 771 | |
Christopher Haster |
0:176c74479de2 | 772 | // Stored as pointer to function and pointer to optional object |
Christopher Haster |
0:176c74479de2 | 773 | // Function pointer is stored as union of possible function types |
Christopher Haster |
0:176c74479de2 | 774 | // to garuntee proper size and alignment |
Christopher Haster |
0:176c74479de2 | 775 | struct _class; |
Christopher Haster |
0:176c74479de2 | 776 | union { |
Christopher Haster |
0:176c74479de2 | 777 | void (*_staticfunc)(); |
Christopher Haster |
0:176c74479de2 | 778 | void (*_boundfunc)(_class *); |
Christopher Haster |
0:176c74479de2 | 779 | void (_class::*_methodfunc)(); |
Christopher Haster |
0:176c74479de2 | 780 | } _func; |
Christopher Haster |
0:176c74479de2 | 781 | |
Christopher Haster |
11:035e0728d927 | 782 | void *_obj; |
Christopher Haster |
11:035e0728d927 | 783 | |
Christopher Haster |
0:176c74479de2 | 784 | // Thunk registered on attach to dispatch calls |
Christopher Haster |
0:176c74479de2 | 785 | R (*_thunk)(void*, void*); |
Christopher Haster |
0:176c74479de2 | 786 | }; |
Christopher Haster |
0:176c74479de2 | 787 | |
Christopher Haster |
0:176c74479de2 | 788 | |
Christopher Haster |
0:176c74479de2 | 789 | #endif |