feat: add lazy init to batcher - #1611
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JoshuaMoelans wants to merge 3 commits into
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- to avoid always running batcher thread even if no metrics are sent - does add single atomic fetch on each enqueue (TBD)
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…close Rename STOPPED → IDLE to clarify it means "not yet started" (retryable), and introduce SHUT_DOWN as a terminal state that start_thread refuses to transition from. This closes a race where a concurrent enqueue could respawn the batcher thread after sentry_close() had already torn down the transport. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The spawned batcher thread received a raw pointer without its own refcount, and shutdown could join a zeroed-out thread handle when start_thread was between the CAS and pthread_create. - Add thread refcount: increment before spawn, release on thread exit - Add thread_spawned atomic flag so shutdown waits for a valid handle - Use CAS on spawn failure to avoid overwriting SHUT_DOWN state Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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possibly part of #1609
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