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/* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 2003 Net Integration Technologies, Inc.
*
*/
#ifndef __WVDELAYEDCALLBACK_H
#define __WVDELAYEDCALLBACK_H
#include "wvcallback.h"
#include "wvistreamlist.h"
/**
* A WvCallback wrapper that delays until the next tick of the WvIStreamList
* main loop.
*
* There are restrictions on the type of the wrapped callback though:
* 1. The return type must be void
* 2. All parameter types must be copy-constructible value types
*/
template<class InnerCallback>
class WvDelayedCallback
{
private:
typedef typename InnerCallback::Parm1 P1;
typedef typename InnerCallback::Parm2 P2;
typedef typename InnerCallback::Parm3 P3;
typedef typename InnerCallback::Parm4 P4;
typedef typename InnerCallback::Parm5 P5;
typedef typename InnerCallback::Parm6 P6;
typedef typename InnerCallback::Parm7 P7;
typedef typename InnerCallback::Parm8 P8;
typedef WvCallbackImpl<void, P1, P2, P3, P4, P5, P6, P7, P8> Impl;
typedef typename Impl::FrozenParams FrozenParams;
InnerCallback cb;
FrozenParams *frozen;
WvStream *stream;
void thaw(WvStream &stream, void *userdata)
{
cb.thaw(*frozen);
}
public:
template<typename PtrToObject, typename PtrToMember>
WvDelayedCallback(PtrToObject obj, PtrToMember member)
: cb(InnerCallback(obj, member)), frozen(0), stream(new WvStream)
{
stream->setcallback(WvStreamCallback(this, &WvDelayedCallback::thaw), 0);
WvIStreamList::globallist.append(stream, true);
}
template<typename Functor>
WvDelayedCallback(const Functor& func)
: cb(InnerCallback(func)), frozen(0), stream(new WvStream)
{
stream->setcallback(WvStreamCallback(this, &WvDelayedCallback::thaw), 0);
WvIStreamList::globallist.append(stream, true);
}
WvDelayedCallback(const WvDelayedCallback &other)
: cb(other.cb), frozen(0), stream(new WvStream)
{
stream->setcallback(WvStreamCallback(this, &WvDelayedCallback::thaw), 0);
WvIStreamList::globallist.append(stream, true);
}
~WvDelayedCallback()
{
stream->setcallback(0, 0);
stream->close();
delete frozen;
}
void operator()()
{
delete frozen;
frozen = new FrozenParams;
stream->alarm(0);
// you can't delay a callback that has a non-void return type, sorry
}
void operator()(P1 p1)
{
delete frozen;
frozen = new FrozenParams(p1);
stream->alarm(0);
}
void operator()(P1 p1, P2 p2)
{
delete frozen;
frozen = new FrozenParams(p1, p2);
stream->alarm(0);
}
void operator()(P1 p1, P2 p2, P3 p3)
{
delete frozen;
frozen = new FrozenParams(p1, p2, p3);
stream->alarm(0);
}
void operator()(P1 p1, P2 p2, P3 p3, P4 p4)
{
delete frozen;
frozen = new FrozenParams(p1, p2, p3, p4);
stream->alarm(0);
}
void operator()(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5)
{
delete frozen;
frozen = new FrozenParams(p1, p2, p3, p4, p5);
stream->alarm(0);
}
void operator()(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6)
{
delete frozen;
frozen = new FrozenParams(p1, p2, p3, p4, p5, p6);
stream->alarm(0);
}
void operator()(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7)
{
delete frozen;
frozen = new FrozenParams(p1, p2, p3, p4, p5, p6, p7);
stream->alarm(0);
}
void operator()(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8)
{
delete frozen;
frozen = new FrozenParams(p1, p2, p3, p4, p5, p6, p7, p8);
stream->alarm(0);
}
};
#endif
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