Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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72 lines
2.6 KiB
72 lines
2.6 KiB
2 years ago
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/*
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* Copyright (c) 2009-2021, Google LLC
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* All rights reserved.
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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 met:
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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 copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Google LLC nor the
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* names of its contributors may be used to endorse or promote products
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* derived from 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 "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY 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 OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef UPB_INTERNAL_ARENA_H_
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#define UPB_INTERNAL_ARENA_H_
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#include "upb/arena.h"
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// Must be last.
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#include "upb/port_def.inc"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct mem_block mem_block;
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struct upb_Arena {
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_upb_ArenaHead head;
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/* Stores cleanup metadata for this arena.
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* - a pointer to the current cleanup counter.
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* - a boolean indicating if there is an unowned initial block. */
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uintptr_t cleanup_metadata;
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/* Allocator to allocate arena blocks. We are responsible for freeing these
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* when we are destroyed. */
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upb_alloc* block_alloc;
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uint32_t last_size;
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/* When multiple arenas are fused together, each arena points to a parent
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* arena (root points to itself). The root tracks how many live arenas
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* reference it. */
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uint32_t refcount; /* Only used when a->parent == a */
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struct upb_Arena* parent;
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/* Linked list of blocks to free/cleanup. */
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mem_block *freelist, *freelist_tail;
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};
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#include "upb/port_undef.inc"
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#endif /* UPB_INTERNAL_ARENA_H_ */
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