diff options
author | Josh Gao <jmgao@google.com> | 2015-09-23 20:45:19 -0700 |
---|---|---|
committer | Josh Gao <jmgao@google.com> | 2015-09-23 20:46:13 -0700 |
commit | f79bdee20cacc521d7ec3a8720a43087b47326d6 (patch) | |
tree | ee9330bdc29d1af5a033ca862a10a33e5e1c1b7f /lib/python2.7/dummy_threading.py | |
parent | df5f01881b6d4e9c59be106b4063247433737773 (diff) | |
download | linux-x86-f79bdee20cacc521d7ec3a8720a43087b47326d6.tar.gz |
Import gdb 7.10 linux-x86_64 prebuilt.
Taken from aosp-master-ndk build 2274331.
Bug: http://b/21920612
Change-Id: I2129ab5b85c96273bdb97ee9ca82116bb4db87fa
Diffstat (limited to 'lib/python2.7/dummy_threading.py')
-rw-r--r-- | lib/python2.7/dummy_threading.py | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/lib/python2.7/dummy_threading.py b/lib/python2.7/dummy_threading.py new file mode 100644 index 0000000..81028a3 --- /dev/null +++ b/lib/python2.7/dummy_threading.py @@ -0,0 +1,78 @@ +"""Faux ``threading`` version using ``dummy_thread`` instead of ``thread``. + +The module ``_dummy_threading`` is added to ``sys.modules`` in order +to not have ``threading`` considered imported. Had ``threading`` been +directly imported it would have made all subsequent imports succeed +regardless of whether ``thread`` was available which is not desired. + +""" +from sys import modules as sys_modules + +import dummy_thread + +# Declaring now so as to not have to nest ``try``s to get proper clean-up. +holding_thread = False +holding_threading = False +holding__threading_local = False + +try: + # Could have checked if ``thread`` was not in sys.modules and gone + # a different route, but decided to mirror technique used with + # ``threading`` below. + if 'thread' in sys_modules: + held_thread = sys_modules['thread'] + holding_thread = True + # Must have some module named ``thread`` that implements its API + # in order to initially import ``threading``. + sys_modules['thread'] = sys_modules['dummy_thread'] + + if 'threading' in sys_modules: + # If ``threading`` is already imported, might as well prevent + # trying to import it more than needed by saving it if it is + # already imported before deleting it. + held_threading = sys_modules['threading'] + holding_threading = True + del sys_modules['threading'] + + if '_threading_local' in sys_modules: + # If ``_threading_local`` is already imported, might as well prevent + # trying to import it more than needed by saving it if it is + # already imported before deleting it. + held__threading_local = sys_modules['_threading_local'] + holding__threading_local = True + del sys_modules['_threading_local'] + + import threading + # Need a copy of the code kept somewhere... + sys_modules['_dummy_threading'] = sys_modules['threading'] + del sys_modules['threading'] + sys_modules['_dummy__threading_local'] = sys_modules['_threading_local'] + del sys_modules['_threading_local'] + from _dummy_threading import * + from _dummy_threading import __all__ + +finally: + # Put back ``threading`` if we overwrote earlier + + if holding_threading: + sys_modules['threading'] = held_threading + del held_threading + del holding_threading + + # Put back ``_threading_local`` if we overwrote earlier + + if holding__threading_local: + sys_modules['_threading_local'] = held__threading_local + del held__threading_local + del holding__threading_local + + # Put back ``thread`` if we overwrote, else del the entry we made + if holding_thread: + sys_modules['thread'] = held_thread + del held_thread + else: + del sys_modules['thread'] + del holding_thread + + del dummy_thread + del sys_modules |