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Future.hpp
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Future.hpp
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#pragma once
#include <nstd/Signal.hpp>
#include <nstd/Call.hpp>
template <typename A>
class Future;
template <>
class Future<void>
{
public:
Future() : _aborting(false), _state(idleState), _joinable(false) {}
~Future() { join(); }
public:
void abort() { _aborting = true; }
bool isAborting() const { return _aborting; }
bool isFinished() const { return _state == finishedState; }
bool isAborted() const { return _state == abortedState; }
void join()
{
if (_joinable)
{
_sig.wait();
_sig.reset();
_joinable = false;
}
}
void start(void (*func)()) { startProc((void (*)(void *)) & proc<Call<void>::Args0>, new Call<void>::Args0(func, this)); }
template <typename D, typename P>
void start(void (*func)(D), const P &p) { startProc((void (*)(void *)) & proc<typename Call<void>::template Args1<D, P> >, new typename Call<void>::template Args1<D, P>(func, p, this)); }
template <typename D, typename E, typename P, typename Q>
void start(void (*func)(D, E), const P &p, const Q &q) { startProc((void (*)(void *)) & proc<typename Call<void>::template Args2<D, E, P, Q> >, new typename Call<void>::template Args2<D, E, P, Q>(func, p, q, this)); }
template <typename D, typename E, typename F, typename P, typename Q, typename R>
void start(void (*func)(D, E, F), const P &p, const Q &q, const R &r) { startProc((void (*)(void *)) & proc<typename Call<void>::template Args3<D, E, F, P, Q, R> >, new typename Call<void>::template Args3<D, E, F, P, Q, R>(func, p, q, r, this)); }
template <typename D, typename E, typename F, typename G, typename P, typename Q, typename R, typename S>
void start(void (*func)(D, E, F, G), const P &p, const Q &q, const R &r, const S &s) { startProc((void (*)(void *)) & proc<typename Call<void>::template Args4<D, E, F, G, P, Q, R, S> >, new typename Call<void>::template Args4<D, E, F, G, P, Q, R, S>(func, p, q, r, s, this)); }
template <typename D, typename E, typename F, typename G, typename H, typename P, typename Q, typename R, typename S, typename T>
void start(void (*func)(D, E, F, G, H), const P &p, const Q &q, const R &r, const S &s, const T &t) { startProc((void (*)(void *)) & proc<typename Call<void>::template Args5<D, E, F, G, H, P, Q, R, S, T> >, new typename Call<void>::template Args5<D, E, F, G, H, P, Q, R, S, T>(func, p, q, r, s, t, this)); }
template <class C>
void start(C &c, void (C::*func)()) { startProc((void (*)(void *)) & proc<typename Call<void>::template Member<C>::Args0>, new typename Call<void>::template Member<C>::Args0(c, func, this)); }
template <class C, typename D, typename P>
void start(C &c, void (C::*func)(D), const P &p) { startProc((void (*)(void *)) & proc<typename Call<void>::template Member<C>::template Args1<D, P> >, new typename Call<void>::template Member<C>::template Args1<D, P>(c, func, p, this)); }
template <class C, typename D, typename E, typename P, typename Q>
void start(C &c, void (C::*func)(D, E), const P &p, const Q &q) { startProc((void (*)(void *)) & proc<typename Call<void>::template Member<C>::template Args2<D, E, P, Q> >, new typename Call<void>::template Member<C>::template Args2<D, E, P, Q>(c, func, p, q, this)); }
template <class C, typename D, typename E, typename F, typename P, typename Q, typename R>
void start(C &c, void (C::*func)(D, E, F), const P &p, const Q &q, const R &r) { startProc((void (*)(void *)) & proc<typename Call<void>::template Member<C>::template Args3<D, E, F, P, Q, R> >, new typename Call<void>::template Member<C>::template Args3<D, E, F, P, Q, R>(c, func, p, q, r, this)); }
template <class C, typename D, typename E, typename F, typename G, typename P, typename Q, typename R, typename S>
void start(C &c, void (C::*func)(D, E, F, G), const P &p, const Q &q, const R &r, const S &s) { startProc((void (*)(void *)) & proc<typename Call<void>::template Member<C>::template Args4<D, E, F, G, P, Q, R, S> >, new typename Call<void>::template Member<C>::template Args4<D, E, F, G, P, Q, R, S>(c, func, p, q, r, s, this)); }
private:
enum State
{
idleState,
runningState,
finishedState,
abortedState,
};
private:
Signal _sig;
volatile bool _aborting;
volatile int _state;
bool _joinable;
void set();
void startProc(void (*proc)(void *), void *param);
private:
template <class A>
static void proc(A *a);
Future(const Future &);
Future &operator=(const Future &);
class Private;
template <typename T>
friend class Future;
};
template <typename A>
class Future
{
public:
Future() {}
~Future() { join(); }
void abort() { future.abort(); }
bool isAborting() const { return future.isAborting(); }
bool isFinished() const { return future.isFinished(); }
bool isAborted() const { return future.isAborted(); }
void join() { future.join(); }
operator const A &() const
{
future.join();
return result;
}
void start(A (*func)()) { future.startProc((void (*)(void *)) & proc<typename Call<A>::Args0>, new typename Call<A>::Args0(func, this)); }
template <typename D, typename P>
void start(A (*func)(D), const P &p) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Args1<D, P> >, new typename Call<A>::template Args1<D, P>(func, p, this)); }
template <typename D, typename E, typename P, typename Q>
void start(A (*func)(D, E), const P &p, const Q &q) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Args2<D, E, P, Q> >, new typename Call<A>::template Args2<D, E, P, Q>(func, p, q, this)); }
template <typename D, typename E, typename F, typename P, typename Q, typename R>
void start(A (*func)(D, E, F), const P &p, const Q &q, const R &r) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Args3<D, E, F, P, Q, R> >, new typename Call<A>::template Args3<D, E, F, P, Q, R>(func, p, q, r, this)); }
template <typename D, typename E, typename F, typename G, typename P, typename Q, typename R, typename S>
void start(A (*func)(D, E, F, G), const P &p, const Q &q, const R &r, const S &s) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Args4<D, E, F, G, P, Q, R, S> >, new typename Call<A>::template Args4<D, E, F, G, P, Q, R, S>(func, p, q, r, s, this)); }
template <typename D, typename E, typename F, typename G, typename H, typename P, typename Q, typename R, typename S, typename T>
void start(A (*func)(D, E, F, G, H), const P &p, const Q &q, const R &r, const S &s, const T &t) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Args5<D, E, F, G, H, P, Q, R, S, T> >, new typename Call<A>::template Args5<D, E, F, G, H, P, Q, R, S, T>(func, p, q, r, s, t, this)); }
template <class C>
void start(C &c, A (C::*func)()) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Member<C>::Args0>, new typename Call<A>::template Member<C>::Args0(c, func, this)); }
template <class C, typename D, typename P>
void start(C &c, A (C::*func)(D), const P &p) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Member<C>::template Args1<D, P> >, new typename Call<A>::template Member<C>::template Args1<D, P>(c, func, p, this)); }
template <class C, typename D, typename E, typename P, typename Q>
void start(C &c, A (C::*func)(D, E), const P &p, const Q &q) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Member<C>::template Args2<D, E, P, Q> >, new typename Call<A>::template Member<C>::template Args2<D, E, P, Q>(c, func, p, q, this)); }
template <class C, typename D, typename E, typename F, typename P, typename Q, typename R>
void start(C &c, A (C::*func)(D, E, F), const P &p, const Q &q, const R &r) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Member<C>::template Args3<D, E, F, P, Q, R> >, new typename Call<A>::template Member<C>::template Args3<D, E, F, P, Q, R>(c, func, p, q, r, this)); }
template <class C, typename D, typename E, typename F, typename G, typename P, typename Q, typename R, typename S>
void start(C &c, A (C::*func)(D, E, F, G), const P &p, const Q &q, const R &r, const S &s) { future.startProc((void (*)(void *)) & proc<typename Call<A>::template Member<C>::template Args4<D, E, F, G, P, Q, R, S> >, new typename Call<A>::template Member<C>::template Args4<D, E, F, G, P, Q, R, S>(c, func, p, q, r, s, this)); }
private:
mutable Future<void> future;
A result;
private:
template <class B>
static void proc(B *b);
Future(const Future &);
Future &operator=(const Future &);
};
template <class A>
void Future<void>::proc(A *a)
{
a->call();
((Future<void> *)a->z)->set();
delete a;
}
template <typename A>
template <class B>
void Future<A>::proc(B *b)
{
((Future<A> *)b->z)->result = b->call();
((Future<A> *)b->z)->future.set();
delete b;
}