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Contents
// 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_MEM_ARENA_HPP_
#define UPB_MEM_ARENA_HPP_
#include <memory>
#include "upb/mem/arena.h"
namespace upb {
class Arena {
public:
// A simple arena with no initial memory block and the default allocator.
Arena() : ptr_(upb_Arena_New(), upb_Arena_Free) {}
Arena(char* initial_block, size_t size)
: ptr_(upb_Arena_Init(initial_block, size, &upb_alloc_global),
upb_Arena_Free) {}
upb_Arena* ptr() const { return ptr_.get(); }
void Fuse(Arena& other) { upb_Arena_Fuse(ptr(), other.ptr()); }
protected:
std::unique_ptr<upb_Arena, decltype(&upb_Arena_Free)> ptr_;
};
// InlinedArena seeds the arenas with a predefined amount of memory. No
// heap memory will be allocated until the initial block is exceeded.
template <int N>
class InlinedArena : public Arena {
public:
InlinedArena() : Arena(initial_block_, N) {}
~InlinedArena() {
// Explicitly destroy the arena now so that it does not outlive
// initial_block_.
ptr_.reset();
}
private:
InlinedArena(const InlinedArena*) = delete;
InlinedArena& operator=(const InlinedArena*) = delete;
char initial_block_[N];
};
} // namespace upb
#endif // UPB_MEM_ARENA_HPP_
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9 entries across 9 versions & 1 rubygems