| // Protocol Buffers - Google's data interchange format |
| // Copyright 2023 Google LLC. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
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| |
| #ifndef UPB_PROTOS_PROTOS_EXTENSION_LOCK_H_ |
| #define UPB_PROTOS_PROTOS_EXTENSION_LOCK_H_ |
| |
| #include <atomic> |
| |
| namespace protos::internal { |
| |
| // TODO: Temporary locking api for cross-language |
| // concurrency issue around extension api that uses lazy promotion |
| // from unknown data to upb_MiniTableExtension. Will be replaced by |
| // a core runtime solution in the future. |
| // |
| // Any api(s) using unknown or extension data (GetOrPromoteExtension, |
| // Serialize and others) call lock/unlock to provide a way for |
| // mixed language implementations to avoid race conditions) |
| using UpbExtensionUnlocker = void (*)(const void*); |
| using UpbExtensionLocker = UpbExtensionUnlocker (*)(const void*); |
| |
| // TODO: Expose as function instead of global. |
| extern std::atomic<UpbExtensionLocker> upb_extension_locker_global; |
| |
| } // namespace protos::internal |
| |
| #endif // UPB_PROTOS_PROTOS_EXTENSION_LOCK_H_ |
