Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
820 B
30 lines
820 B
12 months ago
|
// Protocol Buffers - Google's data interchange format
|
||
|
|
// Copyright 2023 Google LLC. All rights reserved.
|
||
|
|
//
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file or at
|
||
|
|
// https://developers.google.com/open-source/licenses/bsd
|
||
|
|
|
||
|
|
#ifndef UPB_BASE_UPCAST_H_
|
||
|
|
#define UPB_BASE_UPCAST_H_
|
||
|
|
|
||
|
|
// Must be last.
|
||
|
|
#include "upb/port/def.inc"
|
||
|
|
|
||
|
|
// This macro provides a way to upcast message pointers in a way that is
|
||
|
|
// somewhat more bulletproof than blindly casting a pointer. Example:
|
||
|
|
//
|
||
|
|
// typedef struct {
|
||
|
|
// upb_Message UPB_PRIVATE(base);
|
||
|
|
// } pkg_FooMessage;
|
||
|
|
//
|
||
|
|
// void f(pkg_FooMessage* msg) {
|
||
|
|
// upb_Decode(UPB_UPCAST(msg), ...);
|
||
|
|
// }
|
||
|
|
|
||
|
|
#define UPB_UPCAST(x) (&(x)->base##_dont_copy_me__upb_internal_use_only)
|
||
|
|
|
||
|
|
#include "upb/port/undef.inc"
|
||
|
|
|
||
|
|
#endif /* UPB_BASE_UPCAST_H_ */
|