40 lines
1 KiB
C
40 lines
1 KiB
C
#ifndef FREELIST_H
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#define FREELIST_H
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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/* Align to nearest multiple of align */
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static inline size_t align_up_to(size_t n, size_t align) {
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return (n + align - 1) & ~(align - 1);
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}
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/* Fiddle these around according to your need. Delete or check makefile */
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#ifdef FREELIST_ALIGN
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#define ALIGN(x) (align_up_to(x, sizeof(void *)))
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#else
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#define ALIGN(x) (x)
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#endif
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typedef struct FreeListBlock FreeListBlock;
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typedef struct {
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FreeListBlock *free;
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uintptr_t start;
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uintptr_t end;
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size_t size;
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size_t allocated;
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} FreeList;
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int fl_init(FreeList *fl, uintptr_t start, uintptr_t end, size_t itemsize);
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int fl_free(FreeList *fl, void *ptr);
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int fl_is_managed(FreeList *fl, void *ptr);
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void *fl_alloc(FreeList *fl);
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size_t fl_check(FreeList *fl);
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size_t fl_allocated(FreeList *fl);
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size_t fl_available(FreeList *fl);
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size_t fl_capacity(FreeList *fl);
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float fl_utilization(FreeList *fl, size_t itemsize);
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#endif // FREELIST_H
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