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from ctypes import POINTER
from ctypes import pointer
from ctypes import WinDLL
from ctypes.wintypes import BOOL
from ctypes.wintypes import DWORD
from ctypes.wintypes import HANDLE

from fasteners.pywin32.pywintypes import OVERLAPPED

kernel32 = WinDLL('kernel32', use_last_error=True)
_ = pointer

# Refer: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-lockfileex
LockFileEx = kernel32.LockFileEx
LockFileEx.argtypes = [
    HANDLE,
    DWORD,
    DWORD,
    DWORD,
    DWORD,
    POINTER(OVERLAPPED),
]
LockFileEx.restype = BOOL

# Refer: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-unlockfile
UnlockFileEx = kernel32.UnlockFileEx
UnlockFileEx.argtypes = [
    HANDLE,
    DWORD,
    DWORD,
    DWORD,
    POINTER(OVERLAPPED),
]
UnlockFileEx.restype = BOOL

# Errors/flags
GetLastError = kernel32.GetLastError

ERROR_LOCK_VIOLATION = 33

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