################################################################################

# BSD LICENSE

#

# Copyright(c) 2019-2020 Intel Corporation. All rights reserved.

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

#   * Redistributions of source code must retain the above copyright

#     notice, this list of conditions and the following disclaimer.

#   * Redistributions in binary form must reproduce the above copyright

#     notice, this list of conditions and the following disclaimer in

#     the documentation and/or other materials provided with the

#     distribution.

#   * Neither the name of Intel Corporation nor the names of its

#     contributors may be used to endorse or promote products derived

#     from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

################################################################################

"""

Power common functions module

"""

import pwr

def get_pwr_sys():

    """

    Returns list of CPU objects or None on error

    """

    try:

        pwr_sys = pwr.get_system()

    except (IOError, ValueError):

        return None

    return pwr_sys

def get_pwr_cpus():

    """

    Returns list of CPU objects or None on error

    """

    try:

        cpus = pwr.get_cpus()

    except (IOError, ValueError):

        return None

    return cpus

def get_pwr_cores():

    """

    Returns list of CORE objects or None on error

    """

    try:

        cores = pwr.get_cores()

    except (IOError, ValueError):

        return None

    return cores

def get_pwr_lowest_freq():

    """

    Returns lowest supported freq or None on error

    """

    cpus = get_pwr_cpus()

    if not cpus:

        return None

    return cpus[0].lowest_freq

def get_pwr_base_freq():

    """

    Returns base freq or None on error

    """

    cpus = get_pwr_cpus()

    if not cpus:

        return None

    return cpus[0].base_freq

def get_pwr_highest_freq():

    """

    Returns highest supported freq or None on error

    """

    cpus = get_pwr_cpus()

    if not cpus:

        return None

    return cpus[0].highest_freq