1 files changed, 31 insertions, 0 deletions
diff --git a/src/libthread/trend.c b/src/libthread/trend.c
new file mode 100644
index 00000000..6f8adcd5
--- /dev/null
+++ b/src/libthread/trend.c
@@ -0,0 +1,31 @@
+#include <lib9.h>
+#include <thread.h>
+
+Channel *c[3];
+
+
+void
+pingpong(void *v)
+{
+	int n;
+	Channel **c;
+
+	c = v;
+	do{
+		n = recvul(c[0]);
+		sendul(c[1], n-1);
+	}while(n > 0);
+	exit(0);
+}
+
+void
+threadmain(int argc, char **argv)
+{
+	c[0] = chancreate(sizeof(ulong), 1);
+	c[1] = chancreate(sizeof(ulong), 1);
+	c[2] = c[0];
+
+	threadcreate(pingpong, c, 16384);
+	threadcreate(pingpong, c+1, 16384);
+	sendul(c[0], atoi(argv[1]));
+}