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authorLibravatar Shawn O. Pearce <spearce@spearce.org>2006-12-23 02:34:13 -0500
committerLibravatar Junio C Hamano <junkio@cox.net>2006-12-29 11:36:44 -0800
commit079afb18fed078af01bd9ab02e2ebbe5d31893b1 (patch)
tree79fcc6e294e90e3a49f8bad533ee40dcdf2e627d /builtin-diff-index.c
parentReplace use_packed_git with window cursors. (diff)
downloadtgif-079afb18fed078af01bd9ab02e2ebbe5d31893b1.tar.xz
Loop over pack_windows when inflating/accessing data.
When multiple mmaps start getting used for all pack file access it is not possible to get all data associated with a specific object in one contiguous memory region. This limitation prevents simply passing a single address and length to SHA1_Update or to inflate. Instead we need to loop until we have processed all data of interest. As we loop over the data we are always interested in reusing the same window 'cursor', as the prior window will no longer be of any use to us. This allows the use_pack() call to automatically decrement the use count of the prior window before setting up access for us to the next window. Within each loop we need to make use of the available length output parameter of use_pack() to tell us how many bytes are available in the current memory region, as we cannot tell otherwise. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'builtin-diff-index.c')
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