67 lines
2.8 KiB
C
67 lines
2.8 KiB
C
#ifndef HAKMEM_TINY_LEGACY_FALLBACK_BOX_H
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#define HAKMEM_TINY_LEGACY_FALLBACK_BOX_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "../front/tiny_unified_cache.h"
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#include "../front/tiny_first_page_cache.h" // Phase 3 C2: First page inline cache
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#include "../hakmem.h"
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#include "tiny_front_v3_env_box.h"
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#include "free_path_stats_box.h"
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#include "tiny_front_hot_box.h"
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#include "tiny_metadata_cache_env_box.h" // Phase 3 C2: Metadata cache ENV gate
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#include "hakmem_env_snapshot_box.h" // Phase 4 E1: ENV snapshot consolidation
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// Purpose: Encapsulate legacy free logic (shared by multiple paths)
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// Called by: malloc_tiny_fast.h (free path) + tiny_c6_ultra_free_box.c (C6 fallback)
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//
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// Contract:
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// - base: BASE pointer (already extracted via ptr - 1)
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// - class_idx: size class (0-7)
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// - Returns: void (always succeeds or falls back to tiny_hot_free_fast)
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//
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__attribute__((always_inline))
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static inline void tiny_legacy_fallback_free_base_with_env(void* base, uint32_t class_idx, const HakmemEnvSnapshot* env) {
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const TinyFrontV3Snapshot* front_snap =
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env ? (env->tiny_front_v3_enabled ? tiny_front_v3_snapshot_get() : NULL)
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: (__builtin_expect(tiny_front_v3_enabled(), 0) ? tiny_front_v3_snapshot_get() : NULL);
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const bool metadata_cache_on = env ? env->tiny_metadata_cache_eff : tiny_metadata_cache_enabled();
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// Phase 3 C2 Patch 2: First page cache hint (optional fast-path)
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// Check if pointer is in cached page (avoids metadata lookup in future optimizations)
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if (__builtin_expect(metadata_cache_on, 0)) {
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// Note: This is a hint-only check. Even if it hits, we still use the standard path.
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// The cache will be populated during refill operations for future use.
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// Currently this just validates the cache state; actual optimization TBD.
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if (tiny_first_page_cache_hit(class_idx, base, 4096)) {
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// Future: could optimize metadata access here
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}
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}
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// Legacy fallback - Unified Cache push
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if (!front_snap || front_snap->unified_cache_on) {
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if (unified_cache_push(class_idx, HAK_BASE_FROM_RAW(base))) {
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FREE_PATH_STAT_INC(legacy_fallback);
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// Per-class breakdown (Phase 4-1)
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if (__builtin_expect(free_path_stats_enabled(), 0)) {
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if (class_idx < 8) {
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g_free_path_stats.legacy_by_class[class_idx]++;
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}
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}
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return;
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}
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}
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// Final fallback
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tiny_hot_free_fast(class_idx, base);
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}
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__attribute__((always_inline))
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static inline void tiny_legacy_fallback_free_base(void* base, uint32_t class_idx) {
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const HakmemEnvSnapshot* env = hakmem_env_snapshot_enabled() ? hakmem_env_snapshot() : NULL;
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tiny_legacy_fallback_free_base_with_env(base, class_idx, env);
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}
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#endif // HAKMEM_TINY_LEGACY_FALLBACK_BOX_H
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