60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
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// hakmem_bigcache.h - Big-Block Cache (Box理論)
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// Purpose: Per-site ring cache for large allocations (>= 1MB)
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//
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// License: MIT
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// Date: 2025-10-21
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#pragma once
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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// ============================================================================
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// BigCache Box - サイト別大規模ブロックキャッシュ
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// ============================================================================
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// Configuration (環境変数で制御可能)
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#define BIGCACHE_MAX_SITES 256 // Max cached sites (Phase 6.11: 64 → 256, 4x increase)
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#define BIGCACHE_MIN_SIZE 524288 // 512KB minimum for caching (Phase 6.11: reduced from 1MB)
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// Phase 6.11: Expanded size classes (4 → 8 classes, finer granularity to reduce internal fragmentation)
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#define BIGCACHE_NUM_CLASSES 8 // Number of size classes (Phase 6.11: increased from 4)
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#define BIGCACHE_CLASS_512KB 524288 // 512KB size class (NEW)
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#define BIGCACHE_CLASS_1MB 1048576 // 1MB size class
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#define BIGCACHE_CLASS_2MB 2097152 // 2MB size class
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#define BIGCACHE_CLASS_3MB 3145728 // 3MB size class (NEW: reduces fragmentation)
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#define BIGCACHE_CLASS_4MB 4194304 // 4MB size class
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#define BIGCACHE_CLASS_6MB 6291456 // 6MB size class (NEW)
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#define BIGCACHE_CLASS_8MB 8388608 // 8MB size class
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#define BIGCACHE_CLASS_16MB 16777216 // 16MB size class (NEW)
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// BigCache API (Box Interface)
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// Try to get cached block for this site
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// Returns: 1 if hit (out_ptr set), 0 if miss
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int hak_bigcache_try_get(size_t size, uintptr_t site, void** out_ptr);
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// Try to put freed block into cache
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// Returns: 1 if cached, 0 if rejected (full/not cacheable)
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int hak_bigcache_put(void* ptr, size_t class_bytes, uintptr_t site);
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// Initialize BigCache (called from hak_init)
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void hak_bigcache_init(void);
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// Cleanup BigCache (called from hak_shutdown)
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void hak_bigcache_shutdown(void);
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// Stats (for debugging)
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void hak_bigcache_print_stats(void);
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// Set free callback (for proper cleanup on eviction)
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typedef void (*hak_bigcache_free_fn_t)(void* ptr, size_t size);
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void hak_bigcache_set_free_callback(hak_bigcache_free_fn_t fn);
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#ifdef __cplusplus
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}
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#endif
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