// tiny_remote_bg.h - Background remote-drain coalescer (step API)
#pragma once
#include <stdatomic.h>
#include "hakmem_tiny.h"
#include "hakmem_tiny_remote_target.h"

// Drain up to `budget` remote-target slabs for a class.
// Coalesces remote queues into freelists under ownership, then advertises via Ready.
// tiny_remote_drain_locked is defined in hakmem_tiny_remote.inc within the same TU
static void tiny_remote_drain_locked(struct TinySlab* slab);

static inline void tiny_remote_bg_drain_step(int class_idx, int budget) {
    if (budget <= 0) return;
    for (int n = 0; n < budget; n++) {
        TinySlab* slab = remote_target_pop(class_idx);
        if (!slab) break;
        // Drain under per-class lock (matches background loop semantics)
        pthread_mutex_t* lock = &g_tiny_class_locks[class_idx].m;
        pthread_mutex_lock(lock);
        tiny_remote_drain_locked(slab);
        pthread_mutex_unlock(lock);
        // Note: Ready ring is Superslab-specific; TinySlab path does not push Ready hints.
    }
}