Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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55 lines
2.5 KiB
55 lines
2.5 KiB
1 year ago
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// Protocol Buffers - Google's data interchange format
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// Copyright 2023 Google LLC. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google LLC nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef UPB_PROTOS_PROTOS_EXTENSION_LOCK_H_
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#define UPB_PROTOS_PROTOS_EXTENSION_LOCK_H_
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#include <atomic>
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namespace protos::internal {
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// TODO(b/295355754): Temporary locking api for cross-language
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// concurrency issue around extension api that uses lazy promotion
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// from unknown data to upb_MiniTableExtension. Will be replaced by
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// a core runtime solution in the future.
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//
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// Any api(s) using unknown or extension data (GetOrPromoteExtension,
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// Serialize and others) call lock/unlock to provide a way for
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// mixed language implementations to avoid race conditions)
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using UpbExtensionUnlocker = void (*)(const void*);
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using UpbExtensionLocker = UpbExtensionUnlocker (*)(const void*);
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// TODO(b/295355754): Expose as function instead of global.
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extern std::atomic<UpbExtensionLocker> upb_extension_locker_global;
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} // namespace protos::internal
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#endif // UPB_PROTOS_PROTOS_EXTENSION_LOCK_H_
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