// Inline helpers for Ultra-Simple TLS front (tiny per-class stack + bump)
// This header is textually included from hakmem_tiny.c after the following
// symbols are defined:
//   - static int g_ultra_simple;
//   - static __thread TinyUltraFront g_tls_ultra[];
//   - __thread void* g_tls_sll_head[]; __thread uint32_t g_tls_sll_count[];
//   - tiny_mag_init_if_needed(), g_tls_mags[]

#include "box/tls_sll_box.h"  // Box TLS-SLL API

static inline void ultra_init_if_needed(int class_idx) {
    if (!g_ultra_simple || class_idx < 0) return;
    // nothing to do; zero-initialized
}

static inline void* ultra_pop(int class_idx) {
    if (!g_ultra_simple) return NULL;
    TinyUltraFront* uf = &g_tls_ultra[class_idx];
    if (__builtin_expect(uf->top > 0, 1)) {
        return uf->slots[--uf->top];
    }
    return NULL;
}

static inline int ultra_push(int class_idx, void* ptr) {
    if (!g_ultra_simple) return 0;
    TinyUltraFront* uf = &g_tls_ultra[class_idx];
    if (__builtin_expect(uf->top < ULTRA_FRONT_CAP, 1)) { uf->slots[uf->top++] = ptr; return 1; }
    return 0;
}

static inline int ultra_refill_small(int class_idx) {
    if (!g_ultra_simple) return 0;
    TinyUltraFront* uf = &g_tls_ultra[class_idx];
    int room = ULTRA_FRONT_CAP - (int)uf->top; if (room <= 0) return 0;
    int took = 0;
    if (g_tls_sll_enable) {
        while (room > 0) {
            void* h = NULL;
            if (!tls_sll_pop(class_idx, &h)) break;
            uf->slots[uf->top++] = h; room--; took++;
        }
    }
    if (room > 0) {
        tiny_mag_init_if_needed(class_idx);
        TinyTLSMag* mag = &g_tls_mags[class_idx];
        int take = mag->top < room ? mag->top : room;
        for (int i = 0; i < take; i++) uf->slots[uf->top++] = mag->items[--mag->top].ptr;
        took += take;
    }
    return took;
}