RtlCopyMemory = kernel32_dll.RtlCopyMemory Memcpy.argtypes = (ct.c_void_p, ct.c_void_p, ct.c_size_t) MapViewOfFile.argtypes = (wt.HANDLE, wt.DWORD, wt.DWORD, wt.DWORD, ct.c_ulonglong) MapViewOfFile = kernel32_dll.MapViewOfFile Msvcrt_dll = ct.cdll.msvcrt # To be avoidedĬreateFileMapping = kernel32_dll.CreateFileMappingWĬreateFileMapping.argtypes = (wt.HANDLE, wt.LPVOID, wt.DWORD, wt.DWORD, wt.DWORD, wt.LPCWSTR)
#Import msvcrt python code
Your updated code ( code00.py): import sys Note that all these types are simple CTypes types, I use them just for convention / consistency / readability's sake. ctypes.wintypes is not explained, but you can see its exports by running dir(ctypes.wintypes) in the Python console. Shmem = mmap.mmap( 0, 256, "MyFileMappingObject_ctypes", mmap.ACCESS_WRITE)īefore anything, here's (almost) everything that you need: : ctypes - A foreign function library for Python. PBuf = (hMapObject, FILE_MAP_ALL_ACCESS, 0, 0, SHMEMSIZE) Print( "Could not open file mapping object") HMapObject = (INVALID_HANDLE_VALUE, None, PAGE_READWRITE, 0, SHMEMSIZE, szName) SzMsg = "Message from Python(ctypes) process" SzName = ctypes.c_wchar_p( "MyFileMappingObject") OSError: exception: access violation writing 0xFFFFFFFFFA1C001B" import msvcrt, mmap When I try to run the code, I get the error Here is a code for writing values to memory using memory mapping.
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