[python-win32] How to calc amount of avail RAM in a process ?

[Tim Roberts]

geoff wrote:
> Any tips/hints on calculating the potentially available space ?
>   

Do you mean the total amount of process virtual memory space still
available?  You can actually get that from the GlobalMemoryStatusEx
API.  There's no Python wrapper for that, as far as I know, but here's a
ctypes wrapper.  Note that this does not return the total CONTIGUOUS
memory space, but for your purposes, that's probably not critical.

from ctypes import *
from ctypes.wintypes import *

class MEMORYSTATUSEX(Structure):
    _fields_ = [
        ('dwLength', DWORD),
        ('dwMemoryLoad', DWORD),
        ('ullTotalPhys', c_ulonglong),
        ('ullAvailPhys', c_ulonglong),
        ('ullTotalPageFile', c_ulonglong),
        ('ullAvailPageFile', c_ulonglong),
        ('ullTotalVirtual', c_ulonglong),
        ('ullAvailVirtual', c_ulonglong),
        ('ullExtendedVirtual', c_ulonglong),
    ]

def GlobalMemoryStatusEx():
    x = MEMORYSTATUSEX()
    x.dwLength = sizeof(x)
    windll.kernel32.GlobalMemoryStatusEx(byref(x))
    return x

z = GlobalMemoryStatusEx()
print z.ullAvailVirtual

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.