Updated copyright notices to include the year 2018.

lib-index: Add mail_cache_expunge_count It can be called to correctly handle cache counters when records are removed.

Updated copyright notices to include the year 2017.

global: freshen copyright git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-5]/$1-2016/g;s/ (201[0-5]) Dovecot/ $1-2016 Dovecot/'

global: freshen copyright Robomatically: git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-4]/$1-2015/g;s/ (201[0-4]) Dovecot/ $1-2015 Dovecot/' Happy 2015 everyone! Signed-off-by: Phil Carmody <phil@dovecot.fi>

lib-index: mail_cache_lock() partial rewrite. require_same_reset_id is no longer needed, if it ever was. If we're locking the cache file, we always want the latest one. The logic of locking in general was somewhat confusing and it probably didn't always successfully lock when it should have, because the reset_id happened to match an old file.

lib-index: Don't keep cache file locked for as long while syncing index. The earlier code was required for updating the cache offsets, but this code no longer exists. Now we just need to update the record counts in the header, which can be done quickly at the end of the sync.

Updated copyright notices to include year 2014.

Oops :) Update copyrights to 2013 without breaking all .c files.

Updated copyright notices to include year 2013.

lib-index: Fixed invalidating buffered cache file with map_with_read.

lib-index: Replaced cache's deleted_space with deleted_record_count. This way when expunging messages we don't need to actually read through the cache file and calculate how many bytes will be freed, we can simply increase the deleted_record_count by 1. We'll still compress the cache file approximately after 20% of the space (records) has been deleted. This also converts the old "hole offset" header field to tracking the number of records in the cache file. Otherwise we'd have to assume that all of the messages in mailbox have a cache record, but that isn't true for users who have only temporary cache fields. This "hole offset" cannot be trusted completely, because nothing prevents old Dovecot version from simply writing a hole offset there and messing up the record counts. Because of this there are a couple of extra sanity checks for it. (Unfortunately there wasn't any easy way to simply add a new field to header without breaking backwards compatibility.)

lib-index: Cache record linking is now while writing new records, not later with pwrite(). This should make performance somewhat better. It also means that now the only overwrites to cache file are to the file header and the fields header. This means that we no longer have to invalidate file_cache (with mmap_disable=yes) except when reading the headers, which is always done anyway. It would be nice to move the overwritten fields in the headers to a cache header in dovecot.index file, but this is a bit tricky currently. When writing these headers the cache file needs to be locked to avoid race conditions. To avoid deadlocks the transaction log would have to be locked before the cache. The code to do all this would still be a bit complex, and to keep backwards compatibility with old Dovecot versions it would still have to do the overwriting until the backwards compatibility code is disabled.

Updated copyright notices to include year 2012.