BaseTools/Ecc/EOT: Add Python 3 support on ECC and EOT tools.

[mirror_edk2.git] / BaseTools / Source / Python / Common / caching.py

## @file\r
# help with caching in BaseTools\r
#\r
# Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>\r
#\r
# This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
\r
## Import Modules\r
#\r
\r
# for class function\r
class cached_class_function(object):\r
    def __init__(self, function):\r
        self._function = function\r
    def __get__(self, obj, cls):\r
        def CallMeHere(*args,**kwargs):\r
            Value = self._function(obj, *args,**kwargs)\r
            obj.__dict__[self._function.__name__] = lambda *args,**kwargs:Value\r
            return Value\r
        return CallMeHere\r
\r
# for class property\r
class cached_property(object):\r
    def __init__(self, function):\r
        self._function = function\r
    def __get__(self, obj, cls):\r
        Value = obj.__dict__[self._function.__name__] = self._function(obj)\r
        return Value\r
\r
# for non-class function\r
class cached_basic_function(object):\r
    def __init__(self, function):\r
        self._function = function\r
    # wrapper to call _do since <class>.__dict__ doesn't support changing __call__\r
    def __call__(self,*args,**kwargs):\r
        return self._do(*args,**kwargs)\r
    def _do(self,*args,**kwargs):\r
        Value = self._function(*args,**kwargs)\r
        self.__dict__['_do'] = lambda self,*args,**kwargs:Value\r
        return Value\r