# Copyright 2016 Catalysts GmbH

#

# 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

#

# http://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.

import ctypes as ct

from .libbcc import lib

def _read_cpu_range(path):

cpus = []

with open(path, 'r') as f:

cpus_range_str = f.read()

for cpu_range in cpus_range_str.split(','):

rangeop = cpu_range.find('-')

if rangeop == -1:

cpus.append(int(cpu_range))

else:

start = int(cpu_range[:rangeop])

end = int(cpu_range[rangeop+1:])

cpus.extend(range(start, end+1))

return cpus

def get_online_cpus():

return _read_cpu_range('/sys/devices/system/cpu/online')

def get_possible_cpus():

return _read_cpu_range('/sys/devices/system/cpu/possible')

def detect_language(candidates, pid):

res = lib.bcc_procutils_language(pid)

language = ct.cast(res, ct.c_char_p).value.decode()

return language if language in candidates else None