Andrew Gunnerson d874921a69 Replace file reopen concept with ReadAt/WriteAt traits ...

File reopening was conflating ownership of file-like types with the fact
that they support parallel reads and writes at arbitrary offsets.

The Reopen trait has now been replaced with ReadAt and WriteAt traits,
which are implemented for types that support parallel I/O. If a type
compatible with the standard Read/Write/Seek traits is needed, a new
UserPosFile type can act as the bridge by storing its own userspace file
offset. For the opposite bridge, there's MutexFile, which implements
ReadAt/WriteAt by using locks to make the operations sequential. This is
only really used in the tests though.

This eliminates the need for the PSeekFile and SharedCursor types. The
standard File and Cursor types can be used instead, and if shared
ownership is needed, Arc can be used.

Signed-off-by: Andrew Gunnerson <accounts+github@chiller3.com>

2025-08-22 22:07:11 -04:00

..

avb.rs

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bootimage.rs

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cpio.rs

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fec.rs

Replace file reopen concept with ReadAt/WriteAt traits

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lp.rs

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sparse.rs

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