keii.dev
1/*
2 * Copyright (C) 2020-2022 The opuntiaOS Project Authors.
3 * + Contributed by Nikita Melekhin <nimelehin@gmail.com>
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9#ifndef _BOOT_LIBBOOT_MEM_MALLOC_H
10#define _BOOT_LIBBOOT_MEM_MALLOC_H
11
12#include <libboot/mem/mem.h>
13
14static inline void malloc_init(void* addr, size_t size)
15{
16 extern void* _malloc_next_addr;
17 extern void* _malloc_end_addr;
18
19 _malloc_next_addr = addr;
20 _malloc_end_addr = _malloc_next_addr + size;
21}
22
23// Current implementation is a simple linear allocator.
24static void* malloc(size_t size)
25{
26 extern void* _malloc_next_addr;
27 extern void* _malloc_end_addr;
28 if (!_malloc_next_addr) {
29 return NULL;
30 }
31 if (_malloc_next_addr >= _malloc_end_addr) {
32 return NULL;
33 }
34
35 void* res = _malloc_next_addr;
36
37 size = align_size(size, sizeof(void*));
38 _malloc_next_addr += size;
39 return res;
40}
41
42// Current implementation is a simple linear allocator.
43static inline void* malloc_aligned(size_t size, size_t alignment)
44{
45 extern void* _malloc_next_addr;
46 if ((size_t)_malloc_next_addr % alignment) {
47 malloc(alignment - ((size_t)_malloc_next_addr % alignment));
48 }
49 return malloc(size);
50}
51
52static inline void free(void* ptr)
53{
54 UNUSED(ptr);
55}
56
57#endif // _BOOT_LIBBOOT_MEM_MALLOC_H