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Implement grab/drop functions to increase/decrease reference count
and destroy the object if the count drops to 0.
Make sure that all objects that maintain internal references actually
grab that reference, duplicate it in the copy function, drop it in
the destroy handler.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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By storing the blocks in a tree, the de-duplication can lookup
existing blocks in logartihmic instead of linear time.
The linked list is still maintained, because we need to iterate
over the blocks in creation order during serialization.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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It does not make any changes to the writer itself, so mark it as
const. This also requires some similar changes to the string table.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit moves the libsquashfs xattr related code into a sub
directory and splits the xattr writer code up into several files.
No actual code is changed.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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