hakmem/core/tiny_publish.c

// tiny_publish.c - Publish aggregator box
#include "hakmem_tiny.h"
#include "box/mailbox_box.h"
#include "tiny_publish.h"
#include "hakmem_tiny_stats_api.h"
#include "tiny_debug_ring.h"
#include <stdio.h>
#include <stdlib.h>

// externs from main TU
// bench/hot handling remains in core if needed; mailbox publish is always safe

void tiny_publish_notify(int class_idx, SuperSlab* ss, int slab_idx) {
    if (__builtin_expect(class_idx < 0 || class_idx >= TINY_NUM_CLASSES, 0)) {
        tiny_debug_ring_record(TINY_RING_EVENT_SUPERSLAB_ADOPT_FAIL, (uint16_t)0xEEu, ss, (uintptr_t)class_idx);
        return;
    }
    g_pub_notify_calls[class_idx]++;
    tiny_debug_ring_record(TINY_RING_EVENT_SUPERSLAB_PUBLISH, (uint16_t)class_idx, ss, (uintptr_t)slab_idx);
    // One-shot visibility trace (env: HAKMEM_TINY_RF_TRACE)
    static int trace_en = -1;
    if (__builtin_expect(trace_en == -1, 0)) {
        const char* e = getenv("HAKMEM_TINY_RF_TRACE");
        trace_en = (e && atoi(e) != 0) ? 1 : 0;
    }
    if (trace_en) {
        static _Atomic int printed[8];
        int expected = 0;
        if (atomic_compare_exchange_strong(&printed[class_idx], &expected, 1)) {
            fprintf(stderr, "[PUBTRACE] notify class=%d ss=%p slab=%d\n", class_idx, (void*)ss, slab_idx);
        }
    }
    mailbox_box_publish(class_idx, ss, slab_idx);
}