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/*
flext - C++ layer for Max/MSP and pd (pure data) externals
Copyright (c) 2001-2003 Thomas Grill (xovo@gmx.net)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
*/
/*! \file flqueue.cpp
\brief Implementation of the flext message queuing functionality.
*/
#include "flext.h"
#include "flinternal.h"
class flext_base::qmsg
{
public:
qmsg(): nxt(NULL),tp(tp_none) {}
~qmsg();
qmsg *nxt;
void Clear();
void SetBang(outlet *o) { Clear(); out = o; tp = tp_bang; }
void SetFloat(outlet *o,float f) { Clear(); out = o; tp = tp_float; _float = f; }
void SetInt(outlet *o,int i) { Clear(); out = o; tp = tp_int; _int = i; }
void SetSymbol(outlet *o,const t_symbol *s) { Clear(); out = o; tp = tp_sym; _sym = s; }
void SetList(outlet *o,int argc,const t_atom *argv) { Clear(); out = o; tp = tp_list; _list.argc = argc,_list.argv = CopyList(argc,argv); }
void SetAny(outlet *o,const t_symbol *s,int argc,const t_atom *argv) { Clear(); out = o; tp = tp_any; _any.s = s,_any.argc = argc,_any.argv = CopyList(argc,argv); }
outlet *out;
enum { tp_none,tp_bang,tp_float,tp_int,tp_sym,tp_list,tp_any } tp;
union {
float _float;
int _int;
const t_symbol *_sym;
struct { int argc; t_atom *argv; } _list;
struct { const t_symbol *s; int argc; t_atom *argv; } _any;
};
};
flext_base::qmsg::~qmsg()
{
Clear();
if(nxt) delete nxt;
}
void flext_base::qmsg::Clear()
{
if(tp == tp_list) { if(_list.argv) delete[] _list.argv; }
else if(tp == tp_any) { if(_any.argv) delete[] _any.argv; }
tp = tp_none;
}
void flext_base::QTick(flext_base *th)
{
// post("qtick");
#if defined(FLEXT_THREADS) && defined(FLEXT_DEBUG)
if(!th->IsSystemThread()) {
error("flext - Queue tick called by wrong thread!");
return;
}
#endif
#ifdef FLEXT_THREADS
th->qmutex.Lock();
#endif
for(;;) {
qmsg *m = th->qhead;
if(!m) break;
CRITON();
switch(m->tp) {
case qmsg::tp_bang: th->ToOutBang(m->out); break;
case qmsg::tp_float: th->ToOutFloat(m->out,m->_float); break;
case qmsg::tp_int: th->ToOutInt(m->out,m->_int); break;
case qmsg::tp_sym: th->ToOutSymbol(m->out,m->_sym); break;
case qmsg::tp_list: th->ToOutList(m->out,m->_list.argc,m->_list.argv); break;
case qmsg::tp_any: th->ToOutAnything(m->out,m->_any.s,m->_any.argc,m->_any.argv); break;
#ifdef FLEXT_DEBUG
default: ERRINTERNAL();
#endif
}
CRITOFF();
th->qhead = m->nxt;
if(!th->qhead) th->qtail = NULL;
m->nxt = NULL;
delete m;
}
#ifdef FLEXT_THREADS
th->qmutex.Unlock();
#endif
}
void flext_base::Queue(qmsg *m)
{
// post("Queue");
#ifdef FLEXT_THREADS
qmutex.Lock();
#endif
if(qtail) qtail->nxt = m;
else qhead = m;
qtail = m;
#ifdef FLEXT_THREADS
qmutex.Unlock();
#endif
#if FLEXT_SYS == FLEXT_SYS_PD
clock_delay(qclk,0);
#elif FLEXT_SYS == FLEXT_SYS_MAX
qelem_set(qclk);
#else
#error
#endif
}
void flext_base::ToQueueBang(outlet *o) const
{
qmsg *m = new qmsg();
m->SetBang(o);
const_cast<flext_base &>(*this).Queue(m);
}
void flext_base::ToQueueFloat(outlet *o,float f) const
{
qmsg *m = new qmsg;
m->SetFloat(o,f);
const_cast<flext_base &>(*this).Queue(m);
}
void flext_base::ToQueueInt(outlet *o,int f) const
{
qmsg *m = new qmsg;
m->SetInt(o,f);
const_cast<flext_base &>(*this).Queue(m);
}
void flext_base::ToQueueSymbol(outlet *o,const t_symbol *s) const
{
qmsg *m = new qmsg;
m->SetSymbol(o,s);
const_cast<flext_base &>(*this).Queue(m);
}
void flext_base::ToQueueList(outlet *o,int argc,const t_atom *argv) const
{
qmsg *m = new qmsg;
m->SetList(o,argc,argv);
const_cast<flext_base &>(*this).Queue(m);
}
void flext_base::ToQueueAnything(outlet *o,const t_symbol *s,int argc,const t_atom *argv) const
{
qmsg *m = new qmsg;
m->SetAny(o,s,argc,argv);
const_cast<flext_base &>(*this).Queue(m);
}
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