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implement Fsmodule;
include "sys.m";
sys: Sys;
include "draw.m";
include "sh.m";
include "fslib.m";
fslib: Fslib;
Report, Value, type2s, quit: import fslib;
Fschan, Fsdata, Entrychan, Entry,
Gatechan, Gatequery, Nilentry, Option,
Next, Down, Skip, Quit: import Fslib;
types(): string
{
return "tpt";
}
badmod(p: string)
{
sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p);
raise "fail:bad module";
}
init()
{
sys = load Sys Sys->PATH;
fslib = load Fslib Fslib->PATH;
if(fslib == nil)
badmod(Fslib->PATH);
}
run(nil: ref Draw->Context, nil: ref Report,
nil: list of Option, args: list of ref Value): ref Value
{
dst := Entrychan(chan of int, chan of Entry);
spawn selectproc((hd tl args).t().i, dst, (hd args).p().i);
return ref Value.T(dst);
}
selectproc(src, dst: Entrychan, query: Gatechan)
{
if(<-dst.sync == 0){
query <-= (Nilentry, nil);
src.sync <-= 0;
exit;
}
src.sync <-= 1;
reply := chan of int;
while((d := <-src.c).t0 != nil){
query <-= (d, reply);
if(<-reply)
dst.c <-= d;
}
dst.c <-= Nilentry;
query <-= (Nilentry, nil);
}
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