begin_serialized_write()

void MayaFlux::Memory::Seqlock::begin_serialized_write ( )

inlinenoexcept

Claim the writer sequence after any active writer completes.

Spins while the sequence is odd, then atomically advances it to odd. Pair with end_write(), or use SerializedSeqlockWriteGuard. All writers using this path must hold the claim for their entire mutation.

Definition at line 71 of file SeqLock.hpp.

    {
        uint32_t expected = m_seq.load(std::memory_order_relaxed);
        for (;;) {
            if (!(expected & 1U)
                && m_seq.compare_exchange_weak(expected, expected + 1U,
                    std::memory_order_acquire, std::memory_order_relaxed))
                return;
            expected = m_seq.load(std::memory_order_relaxed);
        }
    }

References m_seq.

Referenced by MayaFlux::Memory::SerializedSeqlockWriteGuard::SerializedSeqlockWriteGuard().

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