Source code for pacman.model.resources.constant_sdram
# Copyright (c) 2017-2019 The University of Manchester
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from .abstract_sdram import AbstractSDRAM
[docs]class ConstantSDRAM(AbstractSDRAM):
""" Represents an amount of SDRAM used on a chip in the machine.
This is used when the amount of SDRAM needed is not effected by runtime
"""
__slots__ = [
# The amount of SDRAM in bytes
"_sdram"
]
def __init__(self, sdram):
"""
:param sdram: The amount of SDRAM in bytes
:type sdram: int
:raise None: No known exceptions are raised
"""
self._sdram = sdram
[docs] def get_total_sdram(self, n_timesteps):
return self._sdram
@property
def fixed(self):
return self._sdram
@property
def per_timestep(self):
return 0
def __add__(self, other):
if isinstance(other, ConstantSDRAM):
return ConstantSDRAM(
self._sdram + other._sdram)
else:
# The other is more complex so delegate to it
return other.__add__(self)
def __sub__(self, other):
if isinstance(other, ConstantSDRAM):
return ConstantSDRAM(
self._sdram - other._sdram)
else:
# The other is more complex so delegate to it
return other.sub_from(self)
[docs] def sub_from(self, other):
if isinstance(other, ConstantSDRAM):
return ConstantSDRAM(
other._sdram - self._sdram)
else:
# The other is more complex so delegate to it
return other - self