/usr/lib/python2.7/dist-packages/xappy/memutils.py is in python-xappy 0.5-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | #!/usr/bin/env python
#
# Copyright (C) 2007 Lemur Consulting Ltd
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
r"""memutils.py: Memory handling utilities.
"""
__docformat__ = "restructuredtext en"
import os
def _get_physical_mem_sysconf():
"""Try getting a value for the physical memory using os.sysconf().
Returns None if no value can be obtained - otherwise, returns a value in
bytes.
"""
if getattr(os, 'sysconf', None) is None:
return None
try:
pagesize = os.sysconf('SC_PAGESIZE')
except ValueError:
try:
pagesize = os.sysconf('SC_PAGE_SIZE')
except ValueError:
return None
try:
pagecount = os.sysconf('SC_PHYS_PAGES')
except ValueError:
return None
return pagesize * pagecount
def _get_physical_mem_win32():
"""Try getting a value for the physical memory using GlobalMemoryStatus.
This is a windows specific method. Returns None if no value can be
obtained (eg, not running on windows) - otherwise, returns a value in
bytes.
"""
try:
import ctypes
import ctypes.wintypes as wintypes
except ValueError:
return None
class MEMORYSTATUS(wintypes.Structure):
_fields_ = [
('dwLength', wintypes.DWORD),
('dwMemoryLoad', wintypes.DWORD),
('dwTotalPhys', wintypes.DWORD),
('dwAvailPhys', wintypes.DWORD),
('dwTotalPageFile', wintypes.DWORD),
('dwAvailPageFile', wintypes.DWORD),
('dwTotalVirtual', wintypes.DWORD),
('dwAvailVirtual', wintypes.DWORD),
]
m = MEMORYSTATUS()
wintypes.windll.kernel32.GlobalMemoryStatus(wintypes.byref(m))
return m.dwTotalPhys
def get_physical_memory():
"""Get the amount of physical memory in the system, in bytes.
If this can't be obtained, returns None.
"""
result = _get_physical_mem_sysconf()
if result is not None:
return result
return _get_physical_mem_win32()
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