65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#ifndef ARENA_H
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#define ARENA_H
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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typedef struct Arena Arena;
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typedef enum {
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ARENA_OK = 0,
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ARENA_BAD_ALLOC,
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ARENA_OUT_OF_SPACE,
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ARENA_NULL_ARG,
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ARENA_INVALID_SIZE,
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ARENA_INVALID_ALIGN,
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ARENA_CAPACITY_OVERFLOW,
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} ArenaErr;
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typedef struct {
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bool is_valid;
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union {
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ArenaErr err;
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struct {
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Arena* arena;
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size_t offset;
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};
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};
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} ArenaPointer;
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typedef struct {
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bool is_valid;
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union {
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ArenaErr err;
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Arena* arena;
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};
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} ArenaResult;
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typedef struct {
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bool is_valid;
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union {
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ArenaErr err;
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size_t val;
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};
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} ArenaSizeResult;
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ArenaErr arena_init(Arena** arena, size_t capacity);
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ArenaErr arena_destroy(Arena** arena);
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ArenaPointer arena_alloc(Arena* arena, size_t size, size_t alignment);
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ArenaPointer
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arena_push(Arena* arena, void* data, size_t size, size_t alignment);
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ArenaErr arena_realloc(Arena* arena, size_t new_capacity);
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void* arena_unwrap_pointer(ArenaPointer p);
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ArenaSizeResult arena_get_align_padding(Arena* arena, size_t alignment);
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// can take big sizes but of sourse there is a limit,
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// its protected against SIZE_MAX but anything that
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// is big may break it, still, is an edge case that
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// I shouldn't cover.
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ArenaErr arena_ensure_capacity(Arena* arena, size_t size, size_t alignment);
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#endif // !ARENA_H
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