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73 lines
2.2 KiB
Python
73 lines
2.2 KiB
Python
# test tools for the pyxpcom
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# export a "getmemusage()" function that returns a useful "bytes used" count
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# for the current process. Growth in this when doing the same thing over and
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# over implies a leak.
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try:
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import win32api
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import win32pdh
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import win32pdhutil
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have_pdh = 1
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except ImportError:
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have_pdh = 0
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# XXX - win32pdh is slow, particularly finding our current process.
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# A better way would be good.
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# Our win32pdh specific functions - they can be at the top-level on all
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# platforms, but will only actually be called if the modules are available.
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def FindMyCounter():
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pid_me = win32api.GetCurrentProcessId()
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object = "Process"
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items, instances = win32pdh.EnumObjectItems(None,None,object, -1)
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for instance in instances:
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# We use 2 counters - "ID Process" and "Working Set"
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counter = "ID Process"
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format = win32pdh.PDH_FMT_LONG
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hq = win32pdh.OpenQuery()
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path = win32pdh.MakeCounterPath( (None,object,instance, None, -1,"ID Process") )
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hc1 = win32pdh.AddCounter(hq, path)
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path = win32pdh.MakeCounterPath( (None,object,instance, None, -1,"Working Set") )
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hc2 = win32pdh.AddCounter(hq, path)
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win32pdh.CollectQueryData(hq)
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type, pid = win32pdh.GetFormattedCounterValue(hc1, format)
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if pid==pid_me:
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win32pdh.RemoveCounter(hc1) # not needed any more
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return hq, hc2
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# Not mine - close the query and try again
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win32pdh.RemoveCounter(hc1)
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win32pdh.RemoveCounter(hc2)
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win32pdh.CloseQuery(hq)
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else:
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raise RuntimeError, "Can't find myself!?"
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def CloseCounter(hq, hc):
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win32pdh.RemoveCounter(hc)
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win32pdh.CloseQuery(hq)
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def GetCounterValue(hq, hc):
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win32pdh.CollectQueryData(hq)
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format = win32pdh.PDH_FMT_LONG
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type, val = win32pdh.GetFormattedCounterValue(hc, format)
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return val
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g_pdh_data = None
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# The pdh function that does the work
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def pdh_getmemusage():
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global g_pdh_data
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if g_pdh_data is None:
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hq, hc = FindMyCounter()
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g_pdh_data = hq, hc
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hq, hc = g_pdh_data
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return GetCounterValue(hq, hc)
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# The public bit
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if have_pdh:
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getmemusage = pdh_getmemusage
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else:
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def getmemusage():
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return 0
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