Mercurial Repositories > eric / file comparison
comparison: eric7/EricUtilities/EricMutexLocker.py
eric7/EricUtilities/EricMutexLocker.py
- branch
- eric7
- changeset 8354
- 12ebd3934fef
- parent 8312
- 800c432b34c8
- child 8356
- 68ec9c3d4de5
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| 8353:799196d0b05d | 8354:12ebd3934fef |
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2020 - 2021 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a context manager locking and unlocking a mutex. | |
| 8 """ | |
| 9 | |
| 10 import contextlib | |
| 11 | |
| 12 | |
| 13 class EricMutexLocker(contextlib.AbstractContextManager): | |
| 14 """ | |
| 15 Class implementing a context manager locking and unlocking a mutex. | |
| 16 """ | |
| 17 def __init__(self, mutex): | |
| 18 """ | |
| 19 Constructor | |
| 20 | |
| 21 @param mutex reference to the mutex to be locked | |
| 22 @type QMutex or QRecursiveMutex | |
| 23 """ | |
| 24 self.__mutex = mutex | |
| 25 | |
| 26 def __enter__(self): | |
| 27 """ | |
| 28 Special method called when entering the runtime ccontext. | |
| 29 | |
| 30 @return reference to the context manager object | |
| 31 @rtype E5OverrideCursor | |
| 32 """ | |
| 33 self.__mutex.lock() | |
| 34 | |
| 35 return self | |
| 36 | |
| 37 def __exit__(self, exc_type, exc_value, traceback): | |
| 38 """ | |
| 39 Special method called when exiting the runtime ccontext. | |
| 40 | |
| 41 @param exc_type type of an exception raised in the runtime context | |
| 42 @param exc_value value of an exception raised in the runtime context | |
| 43 @param traceback traceback of an exception raised in the runtime | |
| 44 context | |
| 45 @return always returns None to not suppress any exception | |
| 46 @rtype None | |
| 47 """ | |
| 48 self.__mutex.unlock() | |
| 49 | |
| 50 return None # __IGNORE_WARNING_M831__ |
