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#include <u.h>
#include <libc.h>
#include <thread.h>
#include "dat.h"
#include "fns.h"
int debug;
GameState state;
double t, Δt;
int *conns;
int nconns;
static long
_iolisten(va_list *arg)
{
char *adir, *ldir;
adir = va_arg(*arg, char*);
ldir = va_arg(*arg, char*);
return listen(adir, ldir);
}
long
iolisten(Ioproc *io, char *adir, char *ldir)
{
return iocall(io, _iolisten, adir, ldir);
}
void
threadlisten(void *arg)
{
int lcfd, dfd;
char *adir, ldir[40];
Ioproc *io;
adir = arg;
io = ioproc();
for(;;){
lcfd = iolisten(io, adir, ldir);
if(lcfd < 0){
fprint(2, "iolisten: %r\n");
continue;
}
/*
* handle connection and allocate user on a seat, ready
* to play
*/
dfd = accept(lcfd, ldir);
if(dfd < 0){
fprint(2, "accept: %r\n");
continue;
}
conns = erealloc(conns, ++nconns*sizeof(*conns));
conns[nconns-1] = dfd;
}
}
void
resetsim(void)
{
t = 0;
memset(&state, 0, sizeof state);
state.x = 100;
}
void
threadsim(void *)
{
int i;
uvlong then, now;
double frametime, timeacc;
Ioproc *io;
Δt = 0.01;
then = nanosec();
timeacc = 0;
io = ioproc();
resetsim();
for(;;){
now = nanosec();
frametime = now - then;
then = now;
timeacc += frametime/1e9;
for(i = 0; i < nconns; i++)
fprint(conns[i], "state: x=%g v=%g\n", state.x, state.v);
while(timeacc >= Δt){
integrate(&state, t, Δt);
timeacc -= Δt;
t += Δt;
}
iosleep(io, FPS2MS(1));
}
}
void
usage(void)
{
fprint(2, "usage: %s [-d]\n", argv0);
threadexitsall("usage");
}
void
threadmain(int argc, char *argv[])
{
int acfd;
char adir[40];
ARGBEGIN{
case 'd':
debug++;
break;
default:
usage();
}ARGEND;
if(argc != 0)
usage();
acfd = announce("tcp!*!112", adir);
if(acfd < 0)
sysfatal("announce: %r");
threadcreate(threadlisten, adir, 4096);
threadcreate(threadsim, nil, 4096);
threadexits(nil);
}
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