output/jack: use std::atomic_bool for "shutdown" and "pause"
Without this, the compiler may optimize accesses away.
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@ -28,6 +28,8 @@
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#include "util/Domain.hxx"
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#include "Log.hxx"
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#include <atomic>
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#include <assert.h>
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#include <jack/jack.h>
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@ -69,13 +71,13 @@ struct JackOutput final : AudioOutput {
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jack_client_t *client;
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jack_ringbuffer_t *ringbuffer[MAX_PORTS];
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bool shutdown;
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std::atomic_bool shutdown;
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/**
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* While this flag is set, the "process" callback generates
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* silence.
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*/
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bool pause;
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std::atomic_bool pause;
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explicit JackOutput(const ConfigBlock &block);
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