Source code for pacman.model.resources.constant_sdram

# Copyright (c) 2017 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from typing import Optional, TextIO
from spinn_utilities.overrides import overrides
from .abstract_sdram import AbstractSDRAM


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: int):
        """
        :param sdram: The amount of SDRAM in bytes
        :type sdram: int or ~numpy.int64
        """
        self._sdram = int(sdram)

[docs] @overrides(AbstractSDRAM.get_total_sdram) def get_total_sdram(self, n_timesteps: Optional[int]) -> int: return self._sdram
@property @overrides(AbstractSDRAM.fixed) def fixed(self) -> int: return self._sdram @property @overrides(AbstractSDRAM.per_timestep) def per_timestep(self) -> float: return 0 def __add__(self, other): if isinstance(other, ConstantSDRAM): return ConstantSDRAM( self._sdram + other.fixed) 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.fixed) else: # The other is more complex so delegate to it return other.sub_from(self)
[docs] @overrides(AbstractSDRAM.sub_from) def sub_from(self, other: AbstractSDRAM) -> AbstractSDRAM: if isinstance(other, ConstantSDRAM): return ConstantSDRAM( other.fixed - self._sdram) else: # The other is more complex so delegate to it return other - self
[docs] @overrides(AbstractSDRAM.report) def report(self, timesteps: Optional[int], indent: str = "", preamble: str = "", target: Optional[TextIO] = None): print(indent, preamble, f"Constant {self._sdram} bytes", file=target)