Add common class to access to the CPU

glances/core/glances_cpu_percent.py

@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Glances.
+#
+# Copyright (C) 2015 Nicolargo <nicolas@nicolargo.com>
+#
+# Glances 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, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Glances 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 program. If not, see <http://www.gnu.org/licenses/>.
+
+"""CPU percent stats shared between CPU and Quicklook plugins."""
+
+import psutil
+
+from glances.core.glances_timer import Timer
+
+
+class CpuPercent(object):
+    """Get and strore the CPU percent"""
+
+    def __init__(self, cached_time=1):
+        self.cpu_percent = 0
+
+        # cached_time is the minimum time interval between stats updates
+        # since last update is passed (will retrieve old cached info instead)
+        self.timer = Timer(0)
+        self.cached_time = cached_time
+
+    def get(self):
+        """Update and/or return the CPU using the PSUtil lib"""
+        # Never update more than 1 time per cached_time
+        if self.timer.finished():
+            self.cpu_percent = psutil.cpu_percent(interval=0.0)
+            self.timer = Timer(self.cached_time)
+        return self.cpu_percent
+
+
+# CpuPercent instance shared between plugins
+cpu_percent = CpuPercent()