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In contrast to LLIST_{,TS}_FIND_FOREACH, these convenience macros search
for the first match and return successors until there is an item that
isn't matched by the filter callback. Any items beyond the first cut-off
are discarded.
Should be used when results are known to be continuous, such as
appointments and events belonging to a specific day etc.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
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This convenience function can be used to return the successor of a list
item if it is matched by a filter callback and return NULL otherwise.
We will use this for an improved version of the LLIST_FIND_FOREACH macro
that can be used whenever results are known to be continuous.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
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Adding a tail pointer to each list increases memory footprint by four
bytes, while reducing the runtime of llist_add() from O(n) to O(1). In
testing, the time required to append 100000 elements to a linked list
was reduced from 29.245s to 0.009s.
Our second main concern is to reduce the runtime of llist_add_sorted()
when inserting elements from a presorted list (this is reduced from O(n)
to O(1) as well), since the data files contain appointments in sorted
order and are always processed front to back.
Some local numbers show how this speeds up calcurse startup (test set
with 50000 appointments):
0.22user 0.12system 0:00.35elapsed 99%CPU (0avgtext+0avgdata 5396maxresident)k
0inputs+8outputs (0major+1398minor)pagefaults 0swaps
As opposed to the unpatched binary:
21.97user 0.25system 0:22.23elapsed 99%CPU (0avgtext+0avgdata 5388maxresident)k
0inputs+48outputs (0major+1396minor)pagefaults 0swaps
This is a ~10000% increase in speed. Timings for reading random input
files generated by a script stay the same (32.391s vs. 31.776s).
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
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* Update copyright dates (use 2004-2011 as date range everywhere).
* Change copyright holder from "Frederic Culot" to "calcurse Development
Team".
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
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Add LLIST_TS_* macros in a fashion similar to the already existing
LLIST_* macros. Unlike the non-thread-safe version, these include
LLIST_TS_LOCK and LLIST_TS_UNLOCK which can be used to lock (and unlock)
a list (hence the thread-safety).
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
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