Исходный код
Исходный код
Весь код находится в файле sigslot.h
#ifndef _SIGSLOT_h_
#define _SIGSLOT_h_
// sigslot.h – autor Kluev Alexander kluev@pragmaworks.com
template <class Arg> class signal;
class slot {
friend class signal_base;
slot *_prev;
slot *_next;
struct Thunk {};
typedef void (Thunk::*Func)();
Thunk *_trg;
Func _mfn;
public:
slot(): _trg(0), _mfn(0), _prev(0), _next(0) {}
~slot() {clear();}
public:
void clear() {
if (_next) _next->_prev = _prev;
if (_prev) _prev->_next = _next;
_prev = _next = 0;
}
template <class Owner, class Arg>
void init(signal<Arg>&sig, void (Owner::*mpfn)(Arg), Owner *This) {
clear();
_trg = (Thunk*)This;
_mfn = (Func)mpfn;
sig._add(*this);
}
template <class Owner>
void init(signal<void>&sig, void (Owner::*mpfn)(), Owner *This) {
clear();
_trg = (Thunk*)This;
_mfn = (Func)mpfn; sig._add(*this);
}
private:
template <class Arg>
void _call(Arg a) {
typedef void (Thunk::*XFunc)(Arg);
XFunc f = (XFunc)_mfn;
(_trg->*f)(a);
}
void _call() {
(_trg->*_mfn)();
}
};
class signal_base {
protected:
friend class slot;
slot _head;
void _add(slot&s) {
s._prev =&_head;
s._next = _head._next;
if (_head._next) _head._next->_prev =&s;
_head._next =&s;
}
template <class Arg>
void _raise(Arg a) {
slot *p = _head._next;
while (p) {
p->_call(a);
p = p->_next;
}
}
void _raise() {
slot *p = _head._next;
while (p) {
p->_call();
p = p->_next;
}
}
public:
~signal_base() {
clear();
}
public:
void clear() {
while (_head._next) _head._next->clear();
}
};
template <class Arg>
class signal: public signal_base {
public:
void raise(Arg);
};
typedef void VOID;
template <>
void signal<VOID>::raise() {
signal_base::_raise();
}
template <class Arg>
void signal<Arg>::raise(Arg a) {
signal_base::_raise(a);
}
#endif // _SIGSLOT_h_