Maps size bytes from the file specified by the file descriptor fileno, and Memory Wave returns a mmap object. If length is 0, the utmost length of the map can be the present size of the file when mmap is known as. SHARED creates a mapping that’s shared with all other processes mapping the same areas of the file. WRITE, to specify that the pages may be learn or written. It is an error to specify both flags, prot and entry. See the outline of entry above for info on how to use this parameter. 0. offset should be a multiple of ALLOCATIONGRANULARITY which is equal to PAGESIZE on Unix methods. If trackfd is False, the file descriptor specified by fileno will not be duplicated, and the resulting mmap object is not going to be associated with the map’s underlying file. Which means the scale() and resize() strategies will fail. This mode is useful to limit the number of open file descriptors.
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To ensure validity of the created memory mapping the file specified by the descriptor fileno is internally robotically synchronized with the bodily backing retailer on macOS. Changed in version 3.13: The trackfd parameter was added. Added in model 3.2: Context manager support. Closes the mmap. Subsequent calls to different strategies of the item will end in a ValueError MemoryWave Community exception being raised. This is not going to shut the open file. True if the file is closed. Non-obligatory arguments start and finish are interpreted as in slice notation. Returns -1 on failure. Modified in model 3.5: Writable bytes-like object is now accepted. Flushes adjustments made to the in-memory copy of a file again to disk. With out use of this name there is no guarantee that changes are written again before the item is destroyed. If offset and measurement are specified, solely changes to the given range of bytes can be flushed to disk