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https://github.com/zebrajr/pytorch.git
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f0426e6288
Summary: TODO is incorrect, code was fixed in D4024922. Differential Revision: D4872233 fbshipit-source-id: d66af5e099c3b7beb38cdb8e6acd4b161c8e28f9
68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
## @package scope
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# Module caffe2.python.scope
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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import contextlib
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import threading
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from caffe2.proto import caffe2_pb2
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# Python 2 and 3 compatibility: test if basestring exists
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try:
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basestring # NOQA
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except NameError:
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# This is python3 so we define basestring.
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basestring = str
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# The name scope and device scope when creating a new operator.
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_NAMESCOPE_SEPARATOR = '/'
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_threadlocal_scope = threading.local()
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def CurrentNameScope():
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global _threadlocal_scope
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if not hasattr(_threadlocal_scope, "namescope"):
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_threadlocal_scope.namescope = ''
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return _threadlocal_scope.namescope
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def CurrentDeviceScope():
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global _threadlocal_scope
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if not hasattr(_threadlocal_scope, "devicescope"):
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_threadlocal_scope.devicescope = None
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return _threadlocal_scope.devicescope
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@contextlib.contextmanager
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def NameScope(prefix, reset=False):
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global _threadlocal_scope
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assert isinstance(prefix, basestring), \
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"NameScope takes in a string as its argument."
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old_scope = CurrentNameScope()
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prefix = prefix + _NAMESCOPE_SEPARATOR if prefix is not '' else ''
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if reset:
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_threadlocal_scope.namescope = prefix
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else:
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_threadlocal_scope.namescope = _threadlocal_scope.namescope + prefix
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yield
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assert _threadlocal_scope.namescope.endswith(prefix), \
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"The namescope variable is changed from outside NameScope() calls."
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_threadlocal_scope.namescope = old_scope
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@contextlib.contextmanager
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def DeviceScope(scope):
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assert isinstance(scope, caffe2_pb2.DeviceOption), \
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"DeviceScope takes in a caffe2_pb2.DeviceOption as its argument."
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global _threadlocal_scope
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old_scope = CurrentDeviceScope()
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_threadlocal_scope.devicescope = scope
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yield
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assert _threadlocal_scope.devicescope == scope, \
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"The device scope is changed from outside DeviceScope() calls."
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_threadlocal_scope.devicescope = old_scope
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