Hi ironpython,
Here's your Daily Digest of new issues for project "IronPython".
In today's digest:ISSUES
1. [New issue] multiple calls to ctype.windll.kernel32.CreateEvent fails
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ISSUES
1. [New issue] multiple calls to ctype.windll.kernel32.CreateEvent fails
http://ironpython.codeplex.com/workitem/34839
User paweljasinski has proposed the issue:
"When definition of the structure used as a parameter is recreated before the
call, second and following call fail. Test:
import ctypes
def create_interrupt_event():
class SECURITY_ATTRIBUTES(ctypes.Structure):
_fields_ = [ ("nLength", ctypes.c_int),
("lpSecurityDescriptor", ctypes.c_void_p),
("bInheritHandle", ctypes.c_int) ]
sa = SECURITY_ATTRIBUTES()
sa_p = ctypes.pointer(sa)
sa.nLength = ctypes.sizeof(SECURITY_ATTRIBUTES)
sa.lpSecurityDescriptor = 0
sa.bInheritHandle = 1
return ctypes.windll.kernel32.CreateEventA(
sa_p, # lpEventAttributes
False, # bManualReset
False, # bInitialState
'') # lpName
print "firs call with success"
print create_interrupt_event()
print "second call fails"
print create_interrupt_event()
output:
firs call with success
884
second call fails
Traceback (most recent call last):
File "create-event.py", line 22, in <module>
File "create-event.py", line 14, in create_interrupt_event
_ctypes.ArgumentError: expected LP_SECURITY_ATTRIBUTES, got
LP_SECURITY_ATTRIBUTES
Workaround, move definition of the parameter structure to the module scope"
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