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, 94 insertions, 0 deletions

diff --git a/indra/llcommon/llprocinfo.cpp b/indra/llcommon/llprocinfo.cpp
new file mode 100644
index 0000000000..c00f979b0b
--- /dev/null
+++ b/indra/llcommon/llprocinfo.cpp
@@ -0,0 +1,94 @@
+/** 
+* @file llprocinfo.cpp
+* @brief Process, cpu and resource usage information APIs.
+* @author monty@lindenlab.com
+*
+* $LicenseInfo:firstyear=2013&license=viewerlgpl$
+* 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 "llprocinfo.h"
+
+#if LL_WINDOWS
+
+#define	PSAPI_VERSION	1
+#include "windows.h"
+#include "psapi.h"
+
+#elif LL_DARWIN
+
+#include <sys/resource.h>
+#include <mach/mach.h>
+	
+#else
+
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#endif // LL_WINDOWS/LL_DARWIN
+
+
+// static
+void LLProcInfo::getCPUUsage(time_type & user_time, time_type & system_time)
+{
+#if LL_WINDOWS
+
+	HANDLE self(GetCurrentProcess());			// Does not have to be closed
+	FILETIME ft_dummy, ft_system, ft_user;
+
+	GetProcessTimes(self, &ft_dummy, &ft_dummy, &ft_system, &ft_user);
+	ULARGE_INTEGER uli;
+	uli.u.LowPart = ft_system.dwLowDateTime;
+	uli.u.HighPart = ft_system.dwHighDateTime;
+	system_time = uli.QuadPart / U64L(10);		// Convert to uS
+	uli.u.LowPart = ft_user.dwLowDateTime;
+	uli.u.HighPart = ft_user.dwHighDateTime;
+	user_time = uli.QuadPart / U64L(10);
+	
+#elif LL_DARWIN
+
+	struct rusage usage;
+
+	if (getrusage(RUSAGE_SELF, &usage))
+	{
+		user_time = system_time = time_type(0U);
+		return;
+	}
+	user_time = U64(usage.ru_utime.tv_sec) * U64L(1000000) + usage.ru_utime.tv_usec;
+	system_time = U64(usage.ru_stime.tv_sec) * U64L(1000000) + usage.ru_stime.tv_usec;
+
+#else // Linux
+
+	struct rusage usage;
+
+	if (getrusage(RUSAGE_SELF, &usage))
+	{
+		user_time = system_time = time_type(0U);
+		return;
+	}
+	user_time = U64(usage.ru_utime.tv_sec) * U64L(1000000) + usage.ru_utime.tv_usec;
+	system_time = U64(usage.ru_stime.tv_sec) * U64L(1000000) + usage.ru_stime.tv_usec;
+	
+#endif // LL_WINDOWS/LL_DARWIN/Linux
+}
+
+