SH-4153 Port user and system cpu accounting from example program.

The http_texture_load example program has some cpu usage gathering
tools that should be generally useful and specifically for the
deadman switch.  Port these into llcommon into new all-static
class LLProcInfo.  Add unit test, etc.

1 files changed, 91 insertions, 0 deletions

diff --git a/indra/llcommon/tests/llprocinfo_test.cpp b/indra/llcommon/tests/llprocinfo_test.cpp
new file mode 100644
index 0000000000..0a4210dc07
--- /dev/null
+++ b/indra/llcommon/tests/llprocinfo_test.cpp
@@ -0,0 +1,91 @@
+/** 
+ * @file llprocinfo_test.cpp
+ * @brief Tests for the LLProcInfo class.
+ *
+ * $LicenseInfo:firstyear=2013&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2013, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "../llprocinfo.h"
+
+#include "../test/lltut.h"
+#include "../lltimer.h"
+
+
+static const LLProcInfo::time_type bad_user(289375U), bad_system(275U);
+
+
+namespace tut
+{
+
+struct procinfo_test
+{
+	procinfo_test()
+		{
+		}
+};
+
+typedef test_group<procinfo_test> procinfo_group_t;
+typedef procinfo_group_t::object procinfo_object_t;
+tut::procinfo_group_t procinfo_instance("LLProcInfo");
+
+
+// Basic invocation works
+template<> template<>
+void procinfo_object_t::test<1>()
+{
+	LLProcInfo::time_type user(bad_user), system(bad_system);
+
+	set_test_name("getCPUUsage() basic function");
+
+	LLProcInfo::getCPUUsage(user, system);
+	
+	ensure_not_equals("getCPUUsage() writes to its user argument", user, bad_user);
+	ensure_not_equals("getCPUUsage() writes to its system argument", system, bad_system);
+}
+
+
+// Time increases
+template<> template<>
+void procinfo_object_t::test<2>()
+{
+	LLProcInfo::time_type user(bad_user), system(bad_system);
+	LLProcInfo::time_type user2(bad_user), system2(bad_system);
+
+	set_test_name("getCPUUsage() increases over time");
+
+	LLProcInfo::getCPUUsage(user, system);
+	
+	for (int i(0); i < 100000; ++i)
+	{
+		ms_sleep(0);
+	}
+	
+	LLProcInfo::getCPUUsage(user2, system2);
+
+	ensure_equals("getCPUUsage() user value increases over time", user2 > user, true);
+	ensure_equals("getCPUUsage() system value increases over time", system2 > system, true);
+}
+
+
+} // end namespace tut