Initial core/stats module implementation

Signed-off-by: Antoine Busque <abusque@efficios.com>

diff --git a/lttnganalyses/core/stats.py b/lttnganalyses/core/stats.py
new file mode 100644 (file)
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+++ b/lttnganalyses/core/stats.py
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+# The MIT License (MIT)
+#
+# Copyright (C) 2015 - Antoine Busque <abusque@efficios.com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+class Stats():
+    def reset(self):
+        raise NotImplementedError()
+
+
+class Process(Stats):
+    def __init__(self, pid, tid, comm):
+        self.pid = pid
+        self.tid = tid
+        self.comm = comm
+
+    @classmethod
+    def new_from_process(cls, proc):
+        return cls(proc.pid, proc.tid, proc.comm)
+
+
+class IO(Stats):
+    def __init__(self):
+        # Number of bytes read or written
+        self.read = 0
+        self.write = 0
+
+    def reset(self):
+        self.read = 0
+        self.write = 0
+
+    def __iadd__(self, other):
+        self.read += other.read
+        self.write += other.read
+        return self