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Viewing changes to spyderlib/utils/system.py

  • Committer: Package Import Robot
  • Author(s): Picca Frédéric-Emmanuel
  • Date: 2013-01-20 12:19:54 UTC
  • mfrom: (1.1.16)
  • Revision ID: package-import@ubuntu.com-20130120121954-1jt1xa924bshhvh0
Tags: 2.2.0~beta1+dfsg-2
fix typo ipython-qtconsol -> ipython-qtconsole

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spyderlib/utils/system.py
 
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# -*- coding: utf-8 -*-
 
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#
 
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# Copyright © 2012 Pierre Raybaut
 
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# Licensed under the terms of the MIT License
 
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# (see spyderlib/__init__.py for details)
 
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"""Operating system utilities"""
 
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import os
 
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# Local imports
 
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from spyderlib.utils import programs
 
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def windows_memory_usage():
 
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    """Return physical memory usage (float)
 
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    Works on Windows platforms only"""
 
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    from ctypes import windll, wintypes
 
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    class MemoryStatus(wintypes.Structure):
 
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        _fields_ = [('dwLength', wintypes.DWORD),
 
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                    ('dwMemoryLoad', wintypes.DWORD),
 
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                    ('ullTotalPhys', wintypes.c_uint64),
 
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                    ('ullAvailPhys', wintypes.c_uint64),
 
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                    ('ullTotalPageFile', wintypes.c_uint64),
 
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                    ('ullAvailPageFile', wintypes.c_uint64),
 
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                    ('ullTotalVirtual', wintypes.c_uint64),
 
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                    ('ullAvailVirtual', wintypes.c_uint64),
 
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                    ('ullAvailExtendedVirtual', wintypes.c_uint64),]
 
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    memorystatus = MemoryStatus()
 
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    # MSDN documetation states that dwLength must be set to MemoryStatus
 
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    # size before calling GlobalMemoryStatusEx
 
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    # http://msdn.microsoft.com/en-us/library/aa366770(v=vs.85)
 
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    memorystatus.dwLength = wintypes.sizeof(memorystatus)
 
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    windll.kernel32.GlobalMemoryStatusEx(wintypes.byref(memorystatus))
 
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    return float(memorystatus.dwMemoryLoad)
 
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def psutil_phymem_usage():
 
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    """Return physical memory usage (float)
 
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    Requires the cross-platform psutil (>=v0.3) library
 
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    (http://code.google.com/p/psutil/)"""
 
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    import psutil
 
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    return psutil.phymem_usage().percent
 
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if programs.is_module_installed('psutil', '>=0.3.0'):
 
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    #  Function `psutil.phymem_usage` was introduced in psutil v0.3.0
 
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    memory_usage = psutil_phymem_usage
 
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elif os.name == 'nt':
 
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    # Backup plan for Windows platforms
 
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    memory_usage = windows_memory_usage
 
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else:
 
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    raise ImportError, "Feature requires psutil 0.3+ on non Windows platforms"
 
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if __name__ == '__main__':
 
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    print "*"*80
 
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    print memory_usage.__doc__
 
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    print memory_usage()
 
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    print "*"*80
 
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    print windows_memory_usage.__doc__
 
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    print windows_memory_usage()