| # Copyright 2014 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import telemetry.timeline.event as event |
| |
| |
| class AsyncSlice(event.TimelineEvent): |
| """An AsyncSlice represents an interval of time during which an |
| asynchronous operation is in progress. An AsyncSlice consumes no CPU time |
| itself and so is only associated with Threads at its start and end point. |
| """ |
| def __init__(self, category, name, timestamp, args=None, |
| duration=0, start_thread=None, end_thread=None, |
| thread_start=None, thread_duration=None): |
| super(AsyncSlice, self).__init__( |
| category, name, timestamp, duration, thread_start, thread_duration, |
| args) |
| self.parent_slice = None |
| self.start_thread = start_thread |
| self.end_thread = end_thread |
| self.sub_slices = [] |
| self.id = None |
| |
| def AddSubSlice(self, sub_slice): |
| assert sub_slice.parent_slice == self |
| self.sub_slices.append(sub_slice) |
| |
| def IterEventsInThisContainerRecrusively(self): |
| for sub_slice in self.sub_slices: |
| yield sub_slice |
