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## @package dyndep
# Module caffe2.python.dyndep
import ctypes
import os
from threading import Lock
from caffe2.python import core, extension_loader
def InitOpsLibrary(name, trigger_lazy=True):
"""Loads a dynamic library that contains custom operators into Caffe2.
Since Caffe2 uses static variable registration, you can optionally load a
separate .so file that contains custom operators and registers that into
the caffe2 core binary. In C++, this is usually done by either declaring
dependency during compilation time, or via dynload. This allows us to do
registration similarly on the Python side.
Args:
name: a name that ends in .so, such as "my_custom_op.so". Otherwise,
the command will simply be ignored.
Returns:
None
"""
if not os.path.exists(name):
# Note(jiayq): if the name does not exist, instead of immediately
# failing we will simply print a warning, deferring failure to the
# time when an actual call is made.
print('Ignoring {} as it is not a valid file.'.format(name))
return
_init_impl(name, trigger_lazy=trigger_lazy)
_IMPORTED_DYNDEPS = set()
dll_lock = Lock()
def GetImportedOpsLibraries():
return _IMPORTED_DYNDEPS
def _init_impl(path, trigger_lazy=True):
with dll_lock:
_IMPORTED_DYNDEPS.add(path)
with extension_loader.DlopenGuard():
ctypes.CDLL(path)
# reinitialize available ops
core.RefreshRegisteredOperators(trigger_lazy)
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