what about a wrapper like you do in c# platoform invoke?
“The desire that guides me in all I do is the desire to harness the forces of
nature to the service of mankind. ”Nikola Tesla“Radio Power Will Revolutionize
the World” (Modern Mechanix & Inventions, July, 1934)
On Thursday, July 14, 2022 at 03:59:13 PM EDT, Steven Manross
<ste...@manross.net> wrote:
I got my initial code working on the C DLL and it’s creating snapshot sets as I
want. I am now having a problem with a function to query ALL the snapshots.
This value can be sent to SetContext()
In [39]: alphavsslib.VssSnapshotContext.All
Out[39]: 4294967295
4294967295 = 0xFFFFFFFF
A sample of the call is here:
https://github.com/alphaleonis/AlphaVSS-Samples/blob/8482e83dd13cb8467860e8be199d265963aa6ab8/src/SnapshotQuery/Program.cs
# this is the declaration of SetContext
virtualvoidSetContext(VssSnapshotContext context);
This is the declaration for All: VssSnapshotContext.All=0xFFFFFFFF
https://github.com/alphaleonis/AlphaVSS/blob/13462e657f7993da5c80f835d219bbe82079ce75/src/AlphaVSS.Common/Enumerations/VssSnapshotContext.cs#L58
However, this line results in a Type error
In [40]: ctx = cmp.SetContext(alphavsslib.VssSnapshotContext.All)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
Input In [40], in <cell line: 1>()
----> 1 ctx = cmp.SetContext(alphavsslib.VssSnapshotContext.All)
TypeError: No method matches given arguments for SetContext: (<class 'int'>)
I’ve tried converting the value using:
ctx =
cmp.SetContext(System.Convert.ToUInt32(alphavsslib.VssSnapshotContext.All))
*And*
ctx = cmp.SetContext(ctypes.c_uint32(alphavsslib.VssSnapshotContext.All).value)
but the same error occurs
I can get the function to succeed (albeit it doesn’t show me what I want) with
this:
cmp.SetContext(ctypes.c_int32(alphavsslib.VssSnapshotContext.All).value)
… because ctypes.c_int32(alphavsslib.VssSnapshotContext.All).value = -1
I believe it’s possible that this could be related to the link below but I
can’t be sure because I am not a C developer and I can’t determine how this was
fix from the notes in the link.
Granted, the author is on CentOS, and I’m on Windows… but the backstory behind
the issue sounds like it’s related.
https://github.com/pythonnet/pythonnet/issues/950
I’m currently running on pythonnet 2.5.2 and
Python 3.9.13 (tags/v3.9.13:6de2ca5, May 17 2022, 16:36:42) [MSC v.1929 64 bit
(AMD64)] on win32
Any thoughts or suggestions would be greatly appreciated.
Steven
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