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temporal: extend TempoMap thread local ptr API a little

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This allows checking to see if the map has changed compared with the thread's
current local pointer.
This commit is contained in:
Paul Davis 2022-03-14 14:00:51 -06:00
parent da95a0a0ee
commit 10dc09fcd4
1 changed files with 2 additions and 0 deletions
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libs/temporal/temporal/tempo.h
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@ -668,6 +668,8 @@ class /*LIBTEMPORAL_API*/ TempoMap : public PBD::StatefulDestructible
LIBTEMPORAL_API static void update_thread_tempo_map() { _tempo_map_p = _map_mgr.reader(); }
LIBTEMPORAL_API static SharedPtr use() { assert (_tempo_map_p); return _tempo_map_p; }
LIBTEMPORAL_API static SharedPtr fetch() { update_thread_tempo_map(); return use(); }
LIBTEMPORAL_API static SharedPtr read() { return _map_mgr.reader(); }
LIBTEMPORAL_API static void set (SharedPtr new_map) { _tempo_map_p = new_map; /* new_map must have been fetched with read() */ }
LIBTEMPORAL_API static SharedPtr write_copy();
LIBTEMPORAL_API static void fetch_writable() { _tempo_map_p = write_copy(); }