2d3754d82e
The timeout mechanism has been implemented in python, so there is no more dependence on external utilities for timing out an inferior dotest.py process. Platform-specific bits are implemented for POSIX-like and Windows platforms. There is a small class named ProcessHelper in process_control.py that needs to be overridden for platforms that fall outside of the POSIX-like and Windows platforms. See http://reviews.llvm.org/D13124 for more details. llvm-svn: 248834
67 lines
1.8 KiB
Python
67 lines
1.8 KiB
Python
"""
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The LLVM Compiler Infrastructure
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This file is distributed under the University of Illinois Open Source
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License. See LICENSE.TXT for details.
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Provides classes used by the test results reporting infrastructure
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within the LLDB test suite.
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This module contains utilities used by the lldb test framwork.
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"""
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class OptionalWith(object):
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# pylint: disable=too-few-public-methods
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# This is a wrapper - it is not meant to provide any extra methods.
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"""Provides a wrapper for objects supporting "with", allowing None.
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This lets a user use the "with object" syntax for resource usage
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(e.g. locks) even when the wrapped with object is None.
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e.g.
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wrapped_lock = OptionalWith(thread.Lock())
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with wrapped_lock:
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# Do something while the lock is obtained.
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pass
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might_be_none = None
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wrapped_none = OptionalWith(might_be_none)
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with wrapped_none:
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# This code here still works.
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pass
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This prevents having to write code like this when
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a lock is optional:
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if lock:
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lock.acquire()
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try:
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code_fragament_always_run()
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finally:
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if lock:
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lock.release()
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And I'd posit it is safer, as it becomes impossible to
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forget the try/finally using OptionalWith(), since
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the with syntax can be used.
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"""
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def __init__(self, wrapped_object):
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self.wrapped_object = wrapped_object
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def __enter__(self):
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if self.wrapped_object is not None:
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return self.wrapped_object.__enter__()
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else:
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return self
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def __exit__(self, the_type, value, traceback):
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if self.wrapped_object is not None:
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return self.wrapped_object.__exit__(the_type, value, traceback)
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else:
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# Don't suppress any exceptions
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return False
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