// wrapper_env_cache_box.h - TLS cache layer for wrapper env config (Phase 3 D2)
// Purpose: Eliminate repeated wrapper_env_cfg() calls in malloc/free hot path
// Strategy: Cache the const pointer in TLS (safe, no refresh sync needed)
#pragma once

#include "wrapper_env_box.h"           // wrapper_env_cfg()
#include "wrapper_env_cache_env_box.h" // wrap_env_cache_enabled()

// Fast pointer cache: TLS caches the pointer to g_wrapper_env
// Safety: wrapper_env_refresh_from_env() doesn't change the pointer address,
// only the content of g_wrapper_env, so TLS cache remains valid.
static inline const wrapper_env_cfg_t* wrapper_env_cfg_fast(void) {
    if (__builtin_expect(!wrap_env_cache_enabled(), 1)) {
        // Cache disabled (default): use baseline wrapper_env_cfg()
        return wrapper_env_cfg();
    }

    // Cache enabled: TLS fast pointer
    static __thread const wrapper_env_cfg_t* cached_ptr = NULL;
    if (__builtin_expect(cached_ptr == NULL, 0)) {
        // First access: initialize TLS cache with pointer to g_wrapper_env
        cached_ptr = wrapper_env_cfg();
    }
    return cached_ptr;
}