diff options
Diffstat (limited to 'Database/Keys.hs')
| -rw-r--r-- | Database/Keys.hs | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Database/Keys.hs b/Database/Keys.hs index 62c7c25eb..d4b5b3357 100644 --- a/Database/Keys.hs +++ b/Database/Keys.hs @@ -54,7 +54,14 @@ Content KeyCacheIndex key cache |] -{- Opens the database, creating it if it doesn't exist yet. -} +{- Opens the database, creating it if it doesn't exist yet. + - + - Multiple readers and writers can have the database open at the same + - time. Database.Handle deals with the concurrency issues. + - The lock is held while opening the database, so that when + - the database doesn't exist yet, one caller wins the lock and + - can create it undisturbed. + -} openDb :: Annex DbHandle openDb = withExclusiveLock gitAnnexKeysDbLock $ do dbdir <- fromRepo gitAnnexKeysDb |