// smallobject_cold_iface_v4.h - SmallObject HotHeap v4 Cold Interface (境界 API のみ)
//
// 役割:
//   - HotBox_v4 と Superslab/Warm/Remote を繋ぐ関数ポインタの箱を定義する。
//   - 実装は後続フェーズで追加し、いまは型と宣言だけを置く。
#pragma once

#include <stdbool.h>
#include <stdint.h>

#include "smallobject_hotbox_v4_box.h"

typedef struct SmallColdIfaceV4 {
    small_page_v4* (*refill_page)(small_heap_ctx_v4*, uint32_t class_idx);
    void (*retire_page)(small_heap_ctx_v4*, uint32_t class_idx, small_page_v4* page);
    bool (*remote_push)(small_page_v4* page, void* ptr, uint32_t self_tid);
    void (*remote_drain)(small_heap_ctx_v4*);
} SmallColdIfaceV4;

// Cold iface accessor（実装は後続フェーズ）
const SmallColdIfaceV4* small_cold_iface_v4_get(void);

// Direct function prototypes (Alternative API for direct calls, not yet implemented)
small_page_v4* small_cold_v4_refill_page(small_heap_ctx_v4* ctx, uint32_t class_idx);
void small_cold_v4_retire_page(small_heap_ctx_v4* ctx, small_page_v4* page);
bool small_cold_v4_remote_push(small_page_v4* page, void* ptr, uint32_t tid);
void small_cold_v4_remote_drain(small_heap_ctx_v4* ctx);