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d95e57a328
Description: Original fix Bug#11765744 changed mutex to read write lock to avoid multiple recursive lock acquire operation on LOCK_status mutex. On Windows, locking read-write lock recursively is not safe. Slim read-write locks, which MySQL uses if they are supported by Windows version, do not support recursion according to their documentation. For our own implementation of read-write lock, which is used in cases when Windows version doesn't support SRW, recursive locking of read-write lock can easily lead to deadlock if there are concurrent lock requests. Fix: This patch reverts the previous fix for bug#11765744 that used read-write locks. Instead problem of recursive locking for LOCK_status mutex is solved by tracking recursion level using counter in THD object and acquiring lock only once when we enter fill_status() function first time.
113 KiB
113 KiB