20060303a

1 files changed, 107 insertions, 0 deletions

diff --git a/appl/acme/dat.b b/appl/acme/dat.b
new file mode 100644
index 00000000..924d16e6
--- /dev/null
+++ b/appl/acme/dat.b
@@ -0,0 +1,107 @@
+implement Dat;
+
+include "common.m";
+
+sys : Sys;
+acme : Acme;
+utils : Utils;
+
+# lc, uc : chan of ref Lock;
+
+init(mods : ref Dat->Mods)
+{
+	sys = mods.sys;
+	acme = mods.acme;
+	utils = mods.utils;
+
+	mouse = ref Draw->Pointer;
+	mouse.buttons = mouse.msec = 0;
+	mouse.xy = (0, 0);
+	# lc = chan of ref Lock;
+	# uc = chan of ref Lock;
+	# spawn lockmgr();
+}
+
+# lockmgr()
+# {
+# 	l : ref Lock;
+# 
+# 	acme->lockpid = sys->pctl(0, nil);
+# 	for (;;) {
+# 		alt {
+# 			l = <- lc =>
+# 				if (l.cnt++ == 0)
+# 					l.chann <-= 1;
+# 			l = <- uc =>
+# 				if (--l.cnt > 0)
+# 					l.chann <-= 1;
+# 		}
+# 	}
+# }
+
+Lock.init() : ref Lock
+{
+	return ref Lock(0, chan[1] of int);
+	# return ref Lock(0, chan of int);
+}
+
+Lock.lock(l : self ref Lock)
+{
+	l.cnt++;
+	l.chann <-= 0;
+	# lc <-= l;
+	# <- l.chann;
+}
+
+Lock.unlock(l : self ref Lock)
+{
+	<-l.chann;
+	l.cnt--;
+	# uc <-= l;
+}
+
+Lock.locked(l : self ref Lock) : int
+{
+	return l.cnt > 0;
+}
+
+Ref.init() : ref Ref
+{
+	r := ref Ref;
+	r.l = Lock.init();
+	r.cnt = 0;
+	return r;
+}
+
+Ref.inc(r : self ref Ref) : int
+{
+	r.l.lock();
+	i := r.cnt;
+	r.cnt++;
+	r.l.unlock();
+	return i;
+}
+
+Ref.dec(r : self ref Ref) : int
+{
+	r.l.lock();
+	r.cnt--;
+	i := r.cnt;
+	r.l.unlock();
+	return i;
+}
+
+Ref.refx(r : self ref Ref) : int
+{
+	return r.cnt;
+}
+
+Reffont.get(p, q, r : int, b : string) : ref Reffont
+{
+	return acme->get(p, q, r, b);
+}
+
+Reffont.close(r : self ref Reffont)
+{
+	return acme->close(r);
+}
\ No newline at end of file