// smallsegment_v4_env_box.h - small-object segment v4 の ENV ゲート
// Phase PF2: ENV を宣言するだけ。実装は次フェーズで追加。
#pragma once

#include <stdlib.h>

static inline int smallsegment_v4_enabled(void) {
    static int g = -1;
    if (__builtin_expect(g == -1, 0)) {
        const char* e = getenv("HAKMEM_SMALL_SEGMENT_V4_ENABLED");
        if (e && *e && *e != '0') {
            g = 1;
        } else {
            g = 0;
        }
    }
    return g;
}

static inline const char* smallsegment_v4_size_env(void) {
    static int g_init = 0;
    static const char* g_val = NULL;
    if (__builtin_expect(!g_init, 0)) {
        g_val = getenv("HAKMEM_SMALL_SEGMENT_V4_SIZE");
        g_init = 1;
    }
    return g_val;
}