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/*
*
* Copyright (c) 2021 Project CHIP Authors
* Copyright 2019 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include <cstddef>
#include <type_traits>
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
// Initializes the heap (set start and end blocks)
void PrivateHeapInit(void * heap, size_t size);
// Allocates a new block on the specified heap
void * PrivateHeapAlloc(void * heap, size_t size);
// Marks the specified block as free
void PrivateHeapFree(void * ptr);
// Reallocate a block to a new size
// Special arguments:
// - null ptr value represents an Alloc
// - zero size represents a Free
void * PrivateHeapRealloc(void * heap, void * ptr, size_t size);
void PrivateHeapDump(void * ptr);
#ifdef __cplusplus
} // extern "C"
namespace internal {
// Heap structure, exposed for tests
//
// +---------+---------+-----+ +---------+-----------+
// | prev: 0 | next: n | ... | ....<n_bytes> .... | prev: n | next: ... |
// +---------+---------+-----+ +---------+-----------+
//
struct PrivateHeapBlockHeader
{
uint32_t prevBytes;
uint32_t nextBytes;
uint32_t state;
uint32_t checksum; // super-basic attempt to detect errors
};
} // namespace internal
inline constexpr size_t kPrivateHeapAllocationAlignment = std::alignment_of<max_align_t>::value;
#endif // ifdef __cplusplus