32 lines
1.3 KiB
C
32 lines
1.3 KiB
C
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// smallsegment_v5_box.h - SmallSegment v5（Phase v5-0）
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//
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// 2MiB Segment / 64KiB Page ベースの O(1) page_meta lookup
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#ifndef HAKMEM_SMALLSEGMENT_V5_BOX_H
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#define HAKMEM_SMALLSEGMENT_V5_BOX_H
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#include <stdint.h>
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#include "smallobject_hotbox_v5_box.h"
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#define SMALL_SEGMENT_V5_SIZE (2 * 1024 * 1024) // 2 MiB
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#define SMALL_SEGMENT_V5_PAGE_SIZE (64 * 1024) // 64 KiB
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#define SMALL_SEGMENT_V5_NUM_PAGES (SMALL_SEGMENT_V5_SIZE / SMALL_SEGMENT_V5_PAGE_SIZE) // 32
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#define SMALL_SEGMENT_V5_MAGIC 0xDEADBEEF
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#define SMALL_SEGMENT_V5_PAGE_SHIFT 16 // log2(64KiB)
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// SmallSegmentV5: セグメント構造体
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typedef struct SmallSegmentV5 {
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uintptr_t base; // セグメント先頭アドレス
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uint32_t num_pages; // ページ数（通常は 32）
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uint32_t owner_tid; // オーナースレッド ID
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uint32_t magic; // 0xDEADBEEF for validation
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SmallPageMetaV5 page_meta[SMALL_SEGMENT_V5_NUM_PAGES]; // page metadata array
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} SmallSegmentV5;
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// API（v5-0 では宣言のみ、実装は v5-2）
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SmallSegmentV5* small_segment_v5_acquire(void);
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void small_segment_v5_release(SmallSegmentV5* seg);
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SmallPageMetaV5* small_segment_v5_page_meta_of(void* ptr);
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#endif // HAKMEM_SMALLSEGMENT_V5_BOX_H
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