change *limit* in memory from u64 to i64

Signed-off-by: bin liu <bin@hyper.sh>

tests/cpuset.rs

@@ -1,11 +1,12 @@
 use cgroups::cpuset::CpuSetController;
 use cgroups::error::ErrorKind;
-use cgroups::Cgroup;
+use cgroups::{Cgroup, CpuResources, Hierarchy, Resources};
 
 #[test]
 fn test_cpuset_memory_pressure_root_cg() {
-    let hier = cgroups::hierarchies::V1::new();
-    let cg = Cgroup::new(&hier, String::from("test_cpuset_memory_pressure_root_cg"));
+    let h = cgroups::hierarchies::auto();
+    let h = Box::new(&*h);
+    let cg = Cgroup::new(h, String::from("test_cpuset_memory_pressure_root_cg"));
     {
         let cpuset: &CpuSetController = cg.controller_of().unwrap();
 
@@ -15,3 +16,39 @@ fn test_cpuset_memory_pressure_root_cg() {
     }
     cg.delete();
 }
+
+
+#[test]
+fn test_cpuset_set_cpus() {
+    let h = cgroups::hierarchies::auto();
+    let h = Box::new(&*h);
+    let cg = Cgroup::new(h, String::from("test_cpuset_set_cpus"));
+    {
+        let cpuset: &CpuSetController = cg.controller_of().unwrap();
+
+        let set = cpuset.cpuset();
+        assert_eq!(0, set.cpus.len());
+
+        // 0
+        let r = cpuset.set_cpus("0");
+        assert_eq!(true, r.is_ok());
+
+        let set = cpuset.cpuset();
+        assert_eq!(1, set.cpus.len());
+        assert_eq!((0,0), set.cpus[0]);
+
+
+        // 0-1
+        // FIXME need two cores
+        let r = cpuset.set_cpus("0-1");
+        assert_eq!(true, r.is_ok());
+
+        let set = cpuset.cpuset();
+        assert_eq!(1, set.cpus.len());
+        assert_eq!((0,1), set.cpus[0]);
+
+
+
+    }
+    cg.delete();
+}