/usr/lib/python2.7/dist-packages/ffc/jitobject.py is in python-ffc 1.4.0-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | # Copyright (C) 2008-2013 Anders Logg
#
# This file is part of FFC.
#
# FFC is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# FFC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with FFC. If not, see <http://www.gnu.org/licenses/>.
#
# Modified by Martin Alnaes, 2013
#
# First added: 2008-09-04
# Last changed: 2014-02-20
# Python modules.
from hashlib import sha1
# UFL modules.
import ufl
# FFC modules.
from constants import FFC_VERSION
# UFC modules.
from ffc.backends import ufc
# Compute signature of all ufc headers combined
ufc_signature = sha1(''.join(getattr(ufc, header)
for header in
(k for k in vars(ufc).keys()
if k.endswith("_header")))
).hexdigest()
class JITObject:
"""This class is a wrapper for a compiled object in the context of
specific compiler parameters. A JITObject is identified either by its
hash value or by its signature. The hash value is valid only in a
single instance of an application (at runtime). The signature is
persistent and may be used for caching modules on disk."""
def __init__(self, form, parameters):
"Create JITObject for given form and parameters"
assert(isinstance(form, ufl.Form))
# Store data
self.form = form
self.parameters = parameters
self._hash = None
self._signature = None
def __hash__(self):
"Return unique integer for form + parameters"
# Check if we have computed the hash before
if not self._hash is None:
return self._hash
# Compute hash based on signature
self._hash = int(self.signature(), 16)
return self._hash
def __eq__(self, other):
"Check for equality"
return hash(self) == hash(other)
def signature(self):
"Return unique string for form + parameters"
# Check if we have computed the signature before
if not self._signature is None:
return self._signature
# Get signature from assumed precomputed form_data
form_signature = self.form.form_data().signature
# Compute other relevant signatures
parameters_signature = _parameters_signature(self.parameters)
ffc_signature = str(FFC_VERSION)
#cell_signature = str(self.form.form_data().cell)
# Build common signature
signatures = [form_signature,
parameters_signature,
ffc_signature,
#cell_signature,
ufc_signature]
string = ";".join(signatures)
self._signature = sha1(string).hexdigest()
# Uncomment for debugging
#print "form_signature =", form_signature
#print "parameters_signature =", parameters_signature
#print "ffc_signature =", ffc_signature
#print "cell_signature =", cell_signature
#print "signature =", self._signature
return self._signature
def _parameters_signature(parameters):
"Return parameters signature (some parameters must be ignored)."
parameters = parameters.copy()
ignores = ["log_prefix"]
for ignore in ignores:
if ignore in parameters:
del parameters[ignore]
return str(parameters)
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