Add functions in sysinfo.h.

Bug: 17703902

Change-Id: I699d12d76a8fc483c919be730c2ac63641b71a1d

tests/sys_sysinfo_test.cpp

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <sys/sysinfo.h>
+
+TEST(sys_sysinfo, smoke) {
+  int nprocessor = get_nprocs();
+  ASSERT_GT(nprocessor, 0);
+
+  int nprocessor_conf = get_nprocs_conf();
+  ASSERT_GE(nprocessor_conf, nprocessor);
+
+  long avail_phys_pages = get_avphys_pages();
+  ASSERT_GT(avail_phys_pages, 0);
+
+  long phys_pages = get_phys_pages();
+  ASSERT_GE(phys_pages, avail_phys_pages);
+}