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  1. MariaDB Server
  2. MDEV-24167

InnoDB unnecessarily uses complex rw-lock implementation

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      InnoDB implements its own complex rw-latch whose special features (recursive X-locks and SX-locks) are only needed for buf_block_t::lock and dict_index_t::lock.

      It would be tempting to use the lightweight wrapper mysql_rwlock_t, but unfortunately it would introduce a performance regression on Linux. On Microsoft Windows, we can use a straightforward wrapper of SRWLOCK. On Linux, a std::atomic<uint32_t> and a futex will do. On anything else, we can use mysql_rwlock_t.

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              Assignee:
              marko Marko Mäkelä
              Reporter:
              marko Marko Mäkelä
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