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#ifndef ARENA_H
#define ARENA_H
#include "base.h"
/**
* Arena Helper macro's
* */
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#define ALIGN_UP_POW2(n, p) (((u64)(n) + ((u64)(p) - 1)) & (~((u64)(p) - 1)))
#define PUSH_STRUCT(arena, T) (T *)arena_push((arena), sizeof(T), 0)
#define PUSH_STRUCT_NZ(arena, T) (T *)arena_push((arena), sizeof(T), 1)
#define PUSH_ARRAY(arena, T, n) (T *)arena_push((arena), sizeof(T) * (n), 0)
#define PUSH_ARRAY_NZ(arena, T, n) (T *)arena_push((arena), sizeof(T) * (n), 1)
#define ARENA_BASE_POS (sizeof(mem_arena))
#define ARENA_ALIGN (sizeof(void *))
typedef struct mem_arena mem_arena;
struct mem_arena
{
u64 capacity;
u64 pos;
};
local_internal mem_arena *
arena_create(u64 capacity);
local_internal void
arena_destroy(mem_arena *arena);
local_internal void *
arena_push(mem_arena *arena, u64 size, b32 non_zero);
local_internal void
arena_pop(mem_arena *arena, u64 size);
local_internal void
arena_pop_to(mem_arena *arena, u64 pos);
local_internal void
arena_clear(mem_arena *arena);
#endif
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