mirror of https://github.com/ARMmbed/mbed-os.git
Merge pull request #10 from geky/master
Added improved FuncPtr type
Marcus Shawcroft
commit
0fbdad69ef
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@ -21,38 +21,566 @@
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namespace mbed {
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/* If we had variaditic templates, this wouldn't be a problem, but until C++11 is enabled, we are stuck with multiple classes... */
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// Reusable FuncPtr class based on template specialization
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template <typename F>
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class FuncPtr;
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/** A class for storing and calling a pointer to a static or member function
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*/
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template <typename R, typename A1>
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class FunctionPointerArg1{
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template <typename R, typename A1, typename A2, typename A3, typename A4>
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class FuncPtr<R(A1, A2, A3, A4)> {
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public:
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/** Create a FunctionPointer, attaching a static function
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/** Create a FuncPtr, attaching a static function
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*
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* @param function The static function to attach (default is none)
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*/
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FunctionPointerArg1(R (*function)(A1) = 0) {
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FuncPtr(R (*function)(A1, A2, A3, A4) = 0) {
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attach(function);
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}
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/** Create a FunctionPointer, attaching a member function
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/** Create a FuncPtr, attaching a static function with bound pointer
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*
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* @param object Pointer to object to bind to function
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* @param function The static function to attach
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*/
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template<typename T>
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FuncPtr(T *object, R (*function)(T*, A1, A2, A3, A4)) {
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attach(object, function);
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}
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/** Create a FuncPtr, attaching a member function
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*
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* @param object The object pointer to invoke the member function on (i.e. the this pointer)
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* @param function The address of the member function to attach
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*/
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template<typename T>
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FunctionPointerArg1(T *object, R (T::*member)(A1)) {
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FuncPtr(T *object, R (T::*member)(A1, A2, A3, A4)) {
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attach(object, member);
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}
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/** Create a FuncPtr, attaching a function object
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*
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* @param object Pointer to a function object to attach
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*/
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template<typename T>
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FuncPtr(T *object) {
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attach(object, &T::operator());
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}
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/** Create a FuncPtr from another FuncPtr
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*
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* @param func The func to attach
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*/
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FuncPtr(const FuncPtr<R(A1, A2, A3, A4)> &func) {
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attach(func);
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}
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/** Attach a static function
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*
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* @param function The static function to attach (default is none)
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*/
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void attach(R (*function)(A1, A2, A3, A4)) {
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_object = 0;
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memcpy(&_function, &function, sizeof function);
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_thunk = &FuncPtr::staticthunk;
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}
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/** Attach a static function with bound pointer
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*
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* @param object Pointer to object to bind to function
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* @param function The static function to attach
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*/
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template <typename T>
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void attach(T *object, R (*function)(T*, A1, A2, A3, A4)) {
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_object = static_cast<void*>(object);
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memcpy(&_function, &function, sizeof function);
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_thunk = &FuncPtr::boundthunk<T>;
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}
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/** Attach a member function
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*
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* @param object The object pointer to invoke the member function on (i.e. the this pointer)
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* @param function The address of the member function to attach
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*/
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template<typename T>
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void attach(T *object, R (T::*method)(A1, A2, A3, A4)) {
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_object = static_cast<void*>(object);
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memcpy(&_function, &method, sizeof method);
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_thunk = &FuncPtr::methodthunk<T>;
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}
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/** Attach a function object
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*
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* @param object Pointer to a function object to attach
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*/
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template<typename T>
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void attach(T *object) {
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attach(object, &T::operator());
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}
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/** Attach a FuncPtr
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*
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* @param func The func to attach
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*/
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void attach(const FuncPtr<R(A1, A2, A3, A4)> &func) {
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_object = func._object;
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memcpy(&_function, &func._function, sizeof _function);
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_thunk = func._thunk;
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}
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/** Call the attached static or member function
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*/
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R call(A1 a1, A2 a2, A3 a3, A4 a4) {
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return _thunk(_object, _function, a1, a2, a3, a4);
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}
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/** Get registered static function
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*/
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R (*get_function(A1, A2, A3, A4))() {
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return reinterpret_cast<R (*)(A1, A2, A3, A4)>(_object ? 0 : _function);
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}
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#ifdef MBED_OPERATORS
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R operator ()(A1 a1, A2 a2, A3 a3, A4 a4) {
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return call(a1, a2, a3, a4);
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}
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operator bool(void) const {
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return static_cast<bool>(_function);
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}
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#endif
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private:
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// Static thunks for various function types
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static R staticthunk(void*, void *func, A1 a1, A2 a2, A3 a3, A4 a4) {
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R (*f)(A1, A2, A3, A4) = *reinterpret_cast<R (**)(A1, A2, A3, A4)>(func);
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return f(a1, a2, a3, a4);
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}
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template<typename T>
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static R boundthunk(void *object, void *func, A1 a1, A2 a2, A3 a3, A4 a4) {
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T *o = static_cast<T*>(object);
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R (*f)(T*, A1, A2, A3, A4) = *reinterpret_cast<R (**)(T*, A1, A2, A3, A4)>(func);
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return f(o, a1);
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}
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template<typename T>
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static R methodthunk(void *object, void *member, A1 a1, A2 a2, A3 a3, A4 a4) {
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T* o = static_cast<T*>(object);
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R (T::*m)(A1, A2, A3, A4) = *reinterpret_cast<R (T::**)(A1, A2, A3, A4)>(member);
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return (o->*m)(a1, a2, a3, a4);
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}
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// Forward declaration of an unknown class
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// this kind of declaration is authorized by the standard (see 8.3.3/2 of C++ 03 standard).
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// As a result, the compiler will allocate for UnknownFunctionMember_t the biggest size
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// and biggest alignment possible for member function.
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// This type can be used inside unions, it will help to provide the storage
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// with the proper size and alignment guarantees
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class UnknownClass;
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// object this pointer
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void *_object;
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// aligned raw member function pointer storage - converted back by registered thunk
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char _function[sizeof(void (UnknownClass::*)())];
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// registered function to convert back and call _m.member on _object
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R (*_thunk)(void*, void*, A1, A2, A3, A4);
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};
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/** A class for storing and calling a pointer to a static or member function
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*/
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template <typename R, typename A1, typename A2, typename A3>
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class FuncPtr<R(A1, A2, A3)> {
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public:
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/** Create a FuncPtr, attaching a static function
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*
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* @param function The static function to attach (default is none)
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*/
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FuncPtr(R (*function)(A1, A2, A3) = 0) {
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attach(function);
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}
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/** Create a FuncPtr, attaching a static function with bound pointer
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*
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* @param object Pointer to object to bind to function
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* @param function The static function to attach
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*/
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template<typename T>
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FuncPtr(T *object, R (*function)(T*, A1, A2, A3)) {
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attach(object, function);
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}
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/** Create a FuncPtr, attaching a member function
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*
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* @param object The object pointer to invoke the member function on (i.e. the this pointer)
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* @param function The address of the member function to attach
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*/
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template<typename T>
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FuncPtr(T *object, R (T::*member)(A1, A2, A3)) {
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attach(object, member);
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}
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/** Create a FuncPtr, attaching a function object
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*
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* @param object Pointer to a function object to attach
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*/
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template<typename T>
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FuncPtr(T *object) {
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attach(object, &T::operator());
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}
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/** Create a FuncPtr from another FuncPtr
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*
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* @param func The func to attach
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*/
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FuncPtr(const FuncPtr<R(A1, A2, A3)> &func) {
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attach(func);
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}
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/** Attach a static function
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*
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* @param function The static function to attach (default is none)
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*/
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void attach(R (*function)(A1, A2, A3)) {
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_object = 0;
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memcpy(&_function, &function, sizeof function);
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_thunk = &FuncPtr::staticthunk;
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}
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/** Attach a static function with bound pointer
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*
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* @param object Pointer to object to bind to function
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* @param function The static function to attach
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*/
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template <typename T>
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void attach(T *object, R (*function)(T*, A1, A2, A3)) {
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_object = static_cast<void*>(object);
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memcpy(&_function, &function, sizeof function);
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_thunk = &FuncPtr::boundthunk<T>;
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}
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/** Attach a member function
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*
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* @param object The object pointer to invoke the member function on (i.e. the this pointer)
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* @param function The address of the member function to attach
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*/
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template<typename T>
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void attach(T *object, R (T::*method)(A1, A2, A3)) {
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_object = static_cast<void*>(object);
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memcpy(&_function, &method, sizeof method);
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_thunk = &FuncPtr::methodthunk<T>;
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}
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/** Attach a function object
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*
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* @param object Pointer to a function object to attach
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*/
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template<typename T>
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void attach(T *object) {
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attach(object, &T::operator());
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}
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/** Attach a FuncPtr
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*
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* @param func The func to attach
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*/
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void attach(const FuncPtr<R(A1, A2, A3)> &func) {
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_object = func._object;
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memcpy(&_function, &func._function, sizeof _function);
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_thunk = func._thunk;
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}
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/** Call the attached static or member function
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*/
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R call(A1 a1, A2 a2, A3 a3) {
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return _thunk(_object, _function, a1, a2, a3);
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}
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/** Get registered static function
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*/
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R (*get_function(A1, A2, A3))() {
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return reinterpret_cast<R (*)(A1, A2, A3)>(_object ? 0 : _function);
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}
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#ifdef MBED_OPERATORS
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R operator ()(A1 a1, A2 a2, A3 a3) {
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return call(a1, a2, a3);
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}
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operator bool(void) const {
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return static_cast<bool>(_function);
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}
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#endif
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private:
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// Static thunks for various function types
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static R staticthunk(void*, void *func, A1 a1, A2 a2, A3 a3) {
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R (*f)(A1, A2, A3) = *reinterpret_cast<R (**)(A1, A2, A3)>(func);
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return f(a1, a2, a3);
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}
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template<typename T>
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static R boundthunk(void *object, void *func, A1 a1, A2 a2, A3 a3) {
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T *o = static_cast<T*>(object);
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R (*f)(T*, A1, A2, A3) = *reinterpret_cast<R (**)(T*, A1, A2, A3)>(func);
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return f(o, a1);
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}
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template<typename T>
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static R methodthunk(void *object, void *member, A1 a1, A2 a2, A3 a3) {
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T* o = static_cast<T*>(object);
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R (T::*m)(A1, A2, A3) = *reinterpret_cast<R (T::**)(A1, A2, A3)>(member);
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return (o->*m)(a1, a2, a3);
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}
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// Forward declaration of an unknown class
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// this kind of declaration is authorized by the standard (see 8.3.3/2 of C++ 03 standard).
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// As a result, the compiler will allocate for UnknownFunctionMember_t the biggest size
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// and biggest alignment possible for member function.
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// This type can be used inside unions, it will help to provide the storage
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// with the proper size and alignment guarantees
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class UnknownClass;
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// object this pointer
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void *_object;
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// aligned raw member function pointer storage - converted back by registered thunk
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char _function[sizeof(void (UnknownClass::*)())];
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// registered function to convert back and call _m.member on _object
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R (*_thunk)(void*, void*, A1, A2, A3);
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};
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/** A class for storing and calling a pointer to a static or member function
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*/
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template <typename R, typename A1, typename A2>
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class FuncPtr<R(A1, A2)> {
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public:
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/** Create a FuncPtr, attaching a static function
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*
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* @param function The static function to attach (default is none)
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*/
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FuncPtr(R (*function)(A1, A2) = 0) {
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attach(function);
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}
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/** Create a FuncPtr, attaching a static function with bound pointer
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*
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* @param object Pointer to object to bind to function
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* @param function The static function to attach
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*/
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template<typename T>
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FuncPtr(T *object, R (*function)(T*, A1, A2)) {
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attach(object, function);
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}
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/** Create a FuncPtr, attaching a member function
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*
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* @param object The object pointer to invoke the member function on (i.e. the this pointer)
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* @param function The address of the member function to attach
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*/
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template<typename T>
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FuncPtr(T *object, R (T::*member)(A1, A2)) {
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attach(object, member);
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}
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/** Create a FuncPtr, attaching a function object
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*
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* @param object Pointer to a function object to attach
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*/
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template<typename T>
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FuncPtr(T *object) {
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attach(object, &T::operator());
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}
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/** Create a FuncPtr from another FuncPtr
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*
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* @param func The func to attach
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*/
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FuncPtr(const FuncPtr<R(A1, A2)> &func) {
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attach(func);
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}
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/** Attach a static function
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*
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* @param function The static function to attach (default is none)
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*/
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void attach(R (*function)(A1, A2)) {
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_object = 0;
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memcpy(&_function, &function, sizeof function);
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_thunk = &FuncPtr::staticthunk;
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}
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/** Attach a static function with bound pointer
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*
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* @param object Pointer to object to bind to function
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* @param function The static function to attach
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*/
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template <typename T>
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void attach(T *object, R (*function)(T*, A1, A2)) {
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_object = static_cast<void*>(object);
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memcpy(&_function, &function, sizeof function);
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_thunk = &FuncPtr::boundthunk<T>;
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}
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/** Attach a member function
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*
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* @param object The object pointer to invoke the member function on (i.e. the this pointer)
|
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* @param function The address of the member function to attach
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*/
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template<typename T>
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void attach(T *object, R (T::*method)(A1, A2)) {
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_object = static_cast<void*>(object);
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memcpy(&_function, &method, sizeof method);
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_thunk = &FuncPtr::methodthunk<T>;
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}
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/** Attach a function object
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*
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* @param object Pointer to a function object to attach
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*/
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template<typename T>
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void attach(T *object) {
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attach(object, &T::operator());
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}
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/** Attach a FuncPtr
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*
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* @param func The func to attach
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*/
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void attach(const FuncPtr<R(A1, A2)> &func) {
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_object = func._object;
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memcpy(&_function, &func._function, sizeof _function);
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_thunk = func._thunk;
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}
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/** Call the attached static or member function
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*/
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R call(A1 a1, A2 a2) {
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return _thunk(_object, _function, a1, a2);
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}
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/** Get registered static function
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*/
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R (*get_function(A1, A2))() {
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return reinterpret_cast<R (*)(A1, A2)>(_object ? 0 : _function);
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}
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#ifdef MBED_OPERATORS
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R operator ()(A1 a1, A2 a2) {
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return call(a1, a2);
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}
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operator bool(void) const {
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||||
return static_cast<bool>(_function);
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}
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#endif
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private:
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// Static thunks for various function types
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||||
static R staticthunk(void*, void *func, A1 a1, A2 a2) {
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R (*f)(A1, A2) = *reinterpret_cast<R (**)(A1, A2)>(func);
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return f(a1, a2);
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}
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template<typename T>
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static R boundthunk(void *object, void *func, A1 a1, A2 a2) {
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||||
T *o = static_cast<T*>(object);
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||||
R (*f)(T*, A1, A2) = *reinterpret_cast<R (**)(T*, A1, A2)>(func);
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||||
return f(o, a1);
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}
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template<typename T>
|
||||
static R methodthunk(void *object, void *member, A1 a1, A2 a2) {
|
||||
T* o = static_cast<T*>(object);
|
||||
R (T::*m)(A1, A2) = *reinterpret_cast<R (T::**)(A1, A2)>(member);
|
||||
return (o->*m)(a1, a2);
|
||||
}
|
||||
|
||||
// Forward declaration of an unknown class
|
||||
// this kind of declaration is authorized by the standard (see 8.3.3/2 of C++ 03 standard).
|
||||
// As a result, the compiler will allocate for UnknownFunctionMember_t the biggest size
|
||||
// and biggest alignment possible for member function.
|
||||
// This type can be used inside unions, it will help to provide the storage
|
||||
// with the proper size and alignment guarantees
|
||||
class UnknownClass;
|
||||
|
||||
// object this pointer
|
||||
void *_object;
|
||||
|
||||
// aligned raw member function pointer storage - converted back by registered thunk
|
||||
char _function[sizeof(void (UnknownClass::*)())];
|
||||
|
||||
// registered function to convert back and call _m.member on _object
|
||||
R (*_thunk)(void*, void*, A1, A2);
|
||||
};
|
||||
|
||||
/** A class for storing and calling a pointer to a static or member function
|
||||
*/
|
||||
template <typename R, typename A1>
|
||||
class FuncPtr<R(A1)> {
|
||||
public:
|
||||
/** Create a FuncPtr, attaching a static function
|
||||
*
|
||||
* @param function The static function to attach (default is none)
|
||||
*/
|
||||
FuncPtr(R (*function)(A1) = 0) {
|
||||
attach(function);
|
||||
}
|
||||
|
||||
/** Create a FuncPtr, attaching a static function with bound pointer
|
||||
*
|
||||
* @param object Pointer to object to bind to function
|
||||
* @param function The static function to attach
|
||||
*/
|
||||
template<typename T>
|
||||
FuncPtr(T *object, R (*function)(T*, A1)) {
|
||||
attach(object, function);
|
||||
}
|
||||
|
||||
/** Create a FuncPtr, attaching a member function
|
||||
*
|
||||
* @param object The object pointer to invoke the member function on (i.e. the this pointer)
|
||||
* @param function The address of the member function to attach
|
||||
*/
|
||||
template<typename T>
|
||||
FuncPtr(T *object, R (T::*member)(A1)) {
|
||||
attach(object, member);
|
||||
}
|
||||
|
||||
/** Create a FuncPtr, attaching a function object
|
||||
*
|
||||
* @param object Pointer to a function object to attach
|
||||
*/
|
||||
template<typename T>
|
||||
FuncPtr(T *object) {
|
||||
attach(object, &T::operator());
|
||||
}
|
||||
|
||||
/** Create a FuncPtr from another FuncPtr
|
||||
*
|
||||
* @param func The func to attach
|
||||
*/
|
||||
FuncPtr(const FuncPtr<R(A1)> &func) {
|
||||
attach(func);
|
||||
}
|
||||
|
||||
/** Attach a static function
|
||||
*
|
||||
* @param function The static function to attach (default is none)
|
||||
*/
|
||||
void attach(R (*function)(A1)) {
|
||||
_p.function = function;
|
||||
_membercaller = 0;
|
||||
_object = 0;
|
||||
memcpy(&_function, &function, sizeof function);
|
||||
_thunk = &FuncPtr::staticthunk;
|
||||
}
|
||||
|
||||
/** Attach a static function with bound pointer
|
||||
*
|
||||
* @param object Pointer to object to bind to function
|
||||
* @param function The static function to attach
|
||||
*/
|
||||
template <typename T>
|
||||
void attach(T *object, R (*function)(T*, A1)) {
|
||||
_object = static_cast<void*>(object);
|
||||
memcpy(&_function, &function, sizeof function);
|
||||
_thunk = &FuncPtr::boundthunk<T>;
|
||||
}
|
||||
|
||||
/** Attach a member function
|
||||
|
|
@ -61,141 +589,258 @@ public:
|
|||
* @param function The address of the member function to attach
|
||||
*/
|
||||
template<typename T>
|
||||
void attach(T *object, R (T::*member)(A1)) {
|
||||
_p.object = static_cast<void*>(object);
|
||||
*reinterpret_cast<R (T::**)(A1)>(_member) = member;
|
||||
_membercaller = &FunctionPointerArg1::membercaller<T>;
|
||||
void attach(T *object, R (T::*method)(A1)) {
|
||||
_object = static_cast<void*>(object);
|
||||
memcpy(&_function, &method, sizeof method);
|
||||
_thunk = &FuncPtr::methodthunk<T>;
|
||||
}
|
||||
|
||||
/** Attach a function object
|
||||
*
|
||||
* @param object Pointer to a function object to attach
|
||||
*/
|
||||
template<typename T>
|
||||
void attach(T *object) {
|
||||
attach(object, &T::operator());
|
||||
}
|
||||
|
||||
/** Attach a FuncPtr
|
||||
*
|
||||
* @param func The func to attach
|
||||
*/
|
||||
void attach(const FuncPtr<R(A1)> &func) {
|
||||
_object = func._object;
|
||||
memcpy(&_function, &func._function, sizeof _function);
|
||||
_thunk = func._thunk;
|
||||
}
|
||||
|
||||
/** Call the attached static or member function
|
||||
*/
|
||||
R call(A1 a) {
|
||||
if (_membercaller == 0 && _p.function) {
|
||||
return _p.function(a);
|
||||
} else if (_membercaller && _p.object) {
|
||||
return _membercaller(_p.object, _member, a);
|
||||
}
|
||||
return (R)0;
|
||||
R call(A1 a1) {
|
||||
return _thunk(_object, _function, a1);
|
||||
}
|
||||
|
||||
/** Get registered static function
|
||||
*/
|
||||
R(*get_function(A1))() {
|
||||
return _membercaller ? (R(*)(A1))0 : (R(*)(A1))_p.function;
|
||||
R (*get_function(A1))() {
|
||||
return reinterpret_cast<R (*)(A1)>(_object ? 0 : _function);
|
||||
}
|
||||
|
||||
#ifdef MBED_OPERATORS
|
||||
R operator ()(A1 a) {
|
||||
return call(a);
|
||||
R operator ()(A1 a1) {
|
||||
return call(a1);
|
||||
}
|
||||
operator bool(void) const {
|
||||
return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
|
||||
return static_cast<bool>(_function);
|
||||
}
|
||||
#endif
|
||||
private:
|
||||
template<typename T>
|
||||
static R membercaller(void *object, uintptr_t *member, A1 a) {
|
||||
T* o = static_cast<T*>(object);
|
||||
R (T::**m)(A1) = reinterpret_cast<R (T::**)(A1)>(member);
|
||||
return (o->**m)(a);
|
||||
// Static thunks for various function types
|
||||
static R staticthunk(void*, void *func, A1 a1) {
|
||||
R (*f)(A1) = *reinterpret_cast<R (**)(A1)>(func);
|
||||
return f(a1);
|
||||
}
|
||||
|
||||
union {
|
||||
R (*function)(A1); // static function pointer
|
||||
void *object; // object this pointer
|
||||
} _p;
|
||||
uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
|
||||
R (*_membercaller)(void*, uintptr_t*, A1); // registered membercaller function to convert back and call _m.member on _object
|
||||
template<typename T>
|
||||
static R boundthunk(void *object, void *func, A1 a1) {
|
||||
T *o = static_cast<T*>(object);
|
||||
R (*f)(T*, A1) = *reinterpret_cast<R (**)(T*, A1)>(func);
|
||||
return f(o, a1);
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
static R methodthunk(void *object, void *member, A1 a1) {
|
||||
T* o = static_cast<T*>(object);
|
||||
R (T::*m)(A1) = *reinterpret_cast<R (T::**)(A1)>(member);
|
||||
return (o->*m)(a1);
|
||||
}
|
||||
|
||||
// Forward declaration of an unknown class
|
||||
// this kind of declaration is authorized by the standard (see 8.3.3/2 of C++ 03 standard).
|
||||
// As a result, the compiler will allocate for UnknownFunctionMember_t the biggest size
|
||||
// and biggest alignment possible for member function.
|
||||
// This type can be used inside unions, it will help to provide the storage
|
||||
// with the proper size and alignment guarantees
|
||||
class UnknownClass;
|
||||
|
||||
// object this pointer
|
||||
void *_object;
|
||||
|
||||
// aligned raw member function pointer storage - converted back by registered thunk
|
||||
char _function[sizeof(void (UnknownClass::*)())];
|
||||
|
||||
// registered function to convert back and call _m.member on _object
|
||||
R (*_thunk)(void*, void*, A1);
|
||||
};
|
||||
|
||||
/** A class for storing and calling a pointer to a static or member function (R ()(void))
|
||||
/** A class for storing and calling a pointer to a static or member function
|
||||
*/
|
||||
template <typename R>
|
||||
class FunctionPointerArg1<R, void>{
|
||||
class FuncPtr<R()> {
|
||||
public:
|
||||
/** Create a FunctionPointer, attaching a static function
|
||||
/** Create a FuncPtr, attaching a static function
|
||||
*
|
||||
* @param function The static function to attach (default is none)
|
||||
*/
|
||||
FunctionPointerArg1(R (*function)(void) = 0) {
|
||||
FuncPtr(R (*function)() = 0) {
|
||||
attach(function);
|
||||
}
|
||||
|
||||
/** Create a FunctionPointer, attaching a member function
|
||||
/** Create a FuncPtr, attaching a static function with bound pointer
|
||||
*
|
||||
* @param object The object pointer to invoke the member function on (i.e. the this pointer)
|
||||
* @param function The address of the void member function to attach
|
||||
* @param object Pointer to object to bind to function
|
||||
* @param function The static function to attach
|
||||
*/
|
||||
template<typename T>
|
||||
FunctionPointerArg1(T *object, R (T::*member)(void)) {
|
||||
FuncPtr(T *object, R (*function)(T*)) {
|
||||
attach(object, function);
|
||||
}
|
||||
|
||||
/** Create a FuncPtr, attaching a member function
|
||||
*
|
||||
* @param object The object pointer to invoke the member function on (i.e. the this pointer)
|
||||
* @param function The address of the member function to attach
|
||||
*/
|
||||
template<typename T>
|
||||
FuncPtr(T *object, R (T::*member)()) {
|
||||
attach(object, member);
|
||||
}
|
||||
|
||||
/** Create a FuncPtr, attaching a function object
|
||||
*
|
||||
* @param object Pointer to a function object to attach
|
||||
*/
|
||||
template<typename T>
|
||||
FuncPtr(T *object) {
|
||||
attach(object, &T::operator());
|
||||
}
|
||||
|
||||
/** Create a FuncPtr from another FuncPtr
|
||||
*
|
||||
* @param func The func to attach
|
||||
*/
|
||||
FuncPtr(const FuncPtr<R()> &func) {
|
||||
attach(func);
|
||||
}
|
||||
|
||||
/** Attach a static function
|
||||
*
|
||||
* @param function The void static function to attach (default is none)
|
||||
* @param function The static function to attach (default is none)
|
||||
*/
|
||||
void attach(R (*function)(void)) {
|
||||
_p.function = function;
|
||||
_membercaller = 0;
|
||||
void attach(R (*function)()) {
|
||||
_object = 0;
|
||||
memcpy(&_function, &function, sizeof function);
|
||||
_thunk = &FuncPtr::staticthunk;
|
||||
}
|
||||
|
||||
/** Attach a static function with bound pointer
|
||||
*
|
||||
* @param object Pointer to object to bind to function
|
||||
* @param function The static function to attach
|
||||
*/
|
||||
template <typename T>
|
||||
void attach(T *object, R (*function)(T*)) {
|
||||
_object = static_cast<void*>(object);
|
||||
memcpy(&_function, &function, sizeof function);
|
||||
_thunk = &FuncPtr::boundthunk<T>;
|
||||
}
|
||||
|
||||
/** Attach a member function
|
||||
*
|
||||
* @param object The object pointer to invoke the member function on (i.e. the this pointer)
|
||||
* @param function The address of the void member function to attach
|
||||
* @param function The address of the member function to attach
|
||||
*/
|
||||
template<typename T>
|
||||
void attach(T *object, R (T::*member)(void)) {
|
||||
_p.object = static_cast<void*>(object);
|
||||
*reinterpret_cast<R (T::**)(void)>(_member) = member;
|
||||
_membercaller = &FunctionPointerArg1::membercaller<T>;
|
||||
void attach(T *object, R (T::*method)()) {
|
||||
_object = static_cast<void*>(object);
|
||||
memcpy(&_function, &method, sizeof method);
|
||||
_thunk = &FuncPtr::methodthunk<T>;
|
||||
}
|
||||
|
||||
/** Attach a function object
|
||||
*
|
||||
* @param object Pointer to a function object to attach
|
||||
*/
|
||||
template<typename T>
|
||||
void attach(T *object) {
|
||||
attach(object, &T::operator());
|
||||
}
|
||||
|
||||
/** Attach a FuncPtr
|
||||
*
|
||||
* @param func The func to attach
|
||||
*/
|
||||
void attach(const FuncPtr<R()> &func) {
|
||||
_object = func._object;
|
||||
memcpy(&_function, &func._function, sizeof _function);
|
||||
_thunk = func._thunk;
|
||||
}
|
||||
|
||||
/** Call the attached static or member function
|
||||
*/
|
||||
R call(){
|
||||
if (_membercaller == 0 && _p.function) {
|
||||
return _p.function();
|
||||
} else if (_membercaller && _p.object) {
|
||||
return _membercaller(_p.object, _member);
|
||||
}
|
||||
return (R)0;
|
||||
R call() {
|
||||
return _thunk(_object, _function);
|
||||
}
|
||||
|
||||
/** Get registered static function
|
||||
*/
|
||||
R(*get_function())() {
|
||||
return _membercaller ? (R(*)())0 : (R(*)())_p.function;
|
||||
R (*get_function())() {
|
||||
return reinterpret_cast<R (*)()>(_object ? 0 : _function);
|
||||
}
|
||||
|
||||
#ifdef MBED_OPERATORS
|
||||
R operator ()(void) {
|
||||
R operator ()() {
|
||||
return call();
|
||||
}
|
||||
operator bool(void) const {
|
||||
return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;
|
||||
return static_cast<bool>(_function);
|
||||
}
|
||||
#endif
|
||||
|
||||
private:
|
||||
template<typename T>
|
||||
static R membercaller(void *object, uintptr_t *member) {
|
||||
T* o = static_cast<T*>(object);
|
||||
R (T::**m)(void) = reinterpret_cast<R (T::**)(void)>(member);
|
||||
return (o->**m)();
|
||||
// Static thunks for various function types
|
||||
static R staticthunk(void*, void *func) {
|
||||
R (*f)() = *reinterpret_cast<R (**)()>(func);
|
||||
return f();
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
static R boundthunk(void *object, void *func) {
|
||||
T *o = static_cast<T*>(object);
|
||||
R (*f)(T*) = *reinterpret_cast<R (**)(T*)>(func);
|
||||
return f(o);
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
static R methodthunk(void *object, void *member) {
|
||||
T* o = static_cast<T*>(object);
|
||||
R (T::*m)() = *reinterpret_cast<R (T::**)()>(member);
|
||||
return (o->*m)();
|
||||
}
|
||||
|
||||
// Forward declaration of an unknown class
|
||||
// this kind of declaration is authorized by the standard (see 8.3.3/2 of C++ 03 standard).
|
||||
// As a result, the compiler will allocate for UnknownFunctionMember_t the biggest size
|
||||
// and biggest alignment possible for member function.
|
||||
// This type can be used inside unions, it will help to provide the storage
|
||||
// with the proper size and alignment guarantees
|
||||
class UnknownClass;
|
||||
|
||||
// object this pointer
|
||||
void *_object;
|
||||
|
||||
// aligned raw member function pointer storage - converted back by registered thunk
|
||||
union {
|
||||
R (*function)(void); // static function pointer
|
||||
void *object; // object this pointer
|
||||
} _p;
|
||||
uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller
|
||||
R (*_membercaller)(void*, uintptr_t*); // registered membercaller function to convert back and call _m.member on _object
|
||||
char _function[sizeof(void (UnknownClass::*)())];
|
||||
void (UnknownClass::*_unknownMethod)();
|
||||
};
|
||||
|
||||
// registered function to convert back and call _m.member on _object
|
||||
R (*_thunk)(void*, void*);
|
||||
};
|
||||
|
||||
typedef FunctionPointerArg1<void, void> FunctionPointer;
|
||||
typedef FunctionPointerArg1<void, int> event_callback_t;
|
||||
// Overloads for backwards compatibility
|
||||
typedef FuncPtr<void()> FunctionPointer;
|
||||
typedef FuncPtr<void(int)> event_callback_t;
|
||||
|
||||
} // namespace mbed
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue