| # Copyright (C) 2018 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import time |
| |
| |
| def exec_fn_with_timeout(func, limit=60): |
| """Helper function that executes a given function until it returns True or a |
| given time limit is reached. |
| |
| Arguments: |
| func {function} -- Function to execute. The function can return some output |
| (or None) and as a second return value a boolean indicating, |
| whether the event the function was waiting for has happened. |
| |
| Keyword Arguments: |
| limit {int} -- Maximum time in seconds to wait for a positive response of |
| the function (default: {60}) |
| |
| Returns: |
| boolean -- False, if the timeout was reached |
| any -- Last output of fn |
| """ |
| |
| timeout = time.time() + limit |
| while time.time() < timeout: |
| output, is_finished = func() |
| if is_finished: |
| return True, output |
| return False, output |