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Jan Schmidt authored
A core meta which helps implement the old concept of sub-buffering in some situations, by making it possible for a buffer to keep a ref on a different parent buffer. The parent buffer is unreffed when the Meta is freed. This meta is used to ensure that a buffer whose memory is being shared to a child buffer isn't freed and returned to a buffer pool until the memory is. https://bugzilla.gnome.org/show_bug.cgi?id=750039
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