69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
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#ifndef _LIBC_MALLOC_MALLOC_H
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#define _LIBC_MALLOC_MALLOC_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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#define MALLOC_DEFAULT_BLOCK_SIZE 4096
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#define MALLOC_MAX_ALLOCATED_BLOCKS 256
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#define FLAG_ALLOCATED (0x1)
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#define FLAG_SLAB (0x2)
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struct __malloc_header {
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size_t size;
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uint32_t flags;
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struct __malloc_header* next;
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struct __malloc_header* prev;
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};
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typedef struct __malloc_header malloc_header_t;
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static inline bool block_has_flags(malloc_header_t* block, uint32_t flags)
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{
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return ((block->flags & flags) == flags);
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}
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static inline void block_set_flags(malloc_header_t* block, uint32_t flags)
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{
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block->flags |= flags;
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}
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static inline void block_rem_flags(malloc_header_t* block, uint32_t flags)
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{
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block->flags &= (~flags);
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}
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static inline bool block_is_allocated(malloc_header_t* block)
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{
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return block_has_flags(block, FLAG_ALLOCATED);
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}
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static inline bool block_is_free(malloc_header_t* block)
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{
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return !block_has_flags(block, FLAG_ALLOCATED);
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}
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static inline bool block_is_slab(malloc_header_t* block)
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{
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return block_has_flags(block, FLAG_SLAB);
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}
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void _malloc_init();
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void _slab_init();
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void* malloc(size_t);
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void free(void*);
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void* calloc(size_t, size_t);
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void* realloc(void*, size_t);
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void* slab_alloc(size_t);
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void slab_free(malloc_header_t* mem_header);
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__END_DECLS
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#endif // _LIBC_MALLOC_MALLOC_H
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