Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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29 lines
820 B
29 lines
820 B
// Protocol Buffers - Google's data interchange format |
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// Copyright 2023 Google LLC. All rights reserved. |
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// |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file or at |
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// https://developers.google.com/open-source/licenses/bsd |
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#ifndef UPB_BASE_UPCAST_H_ |
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#define UPB_BASE_UPCAST_H_ |
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// Must be last. |
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#include "upb/port/def.inc" |
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// This macro provides a way to upcast message pointers in a way that is |
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// somewhat more bulletproof than blindly casting a pointer. Example: |
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// |
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// typedef struct { |
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// upb_Message UPB_PRIVATE(base); |
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// } pkg_FooMessage; |
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// |
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// void f(pkg_FooMessage* msg) { |
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// upb_Decode(UPB_UPCAST(msg), ...); |
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// } |
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#define UPB_UPCAST(x) (&(x)->base##_dont_copy_me__upb_internal_use_only) |
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#include "upb/port/undef.inc" |
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#endif /* UPB_BASE_UPCAST_H_ */
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