df216b6901
実装内容: 1. SmallSegmentV6のmmap割り当ては既に v6-0で実装済み 2. small_heap_ctx_v6() で segment 取得時に region_id_register_v6_segment() 呼び出し 3. region_id_v6.c に TLS スコープのセグメント登録ロジック実装: - 4つの static __thread 変数でセグメント情報をキャッシュ - region_id_register_v6_segment(): セグメント base/end を TLS に記録 - region_id_lookup_v6(): TLS segment の range check を最初に実行 - TLS cache 更新で O(1) lookup 実現 4. region_id_v6_box.h に SmallSegmentV6 type include & function 宣言追加 5. small_v6_region_observe_validate() に region_id_observe_lookup() 呼び出し追加 効果: - HeaderlessデザインでRegionIdBoxが正式にSMALL_V6分類を返せるように - TLS-scopedな簡潔な登録メカニズム (マルチスレッド対応) - Fast path: TLS segment range check -> page_meta lookup - Fall back path: 従来の small_page_meta_v6_of() による動的検出 - Latency: O(1) TLS cache hit rate がv6 alloc/free の大部分をカバー 🤖 Generated with Claude Code Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
92 lines
3.6 KiB
C
92 lines
3.6 KiB
C
// smallobject_v6_env_box.h - SmallObject v6 ENV Control Box (Headerless Mode)
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//
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// Phase V6-HDR-2: Additional ENV control for headerless mode
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// - Uses tiny_route_env_box.h for v6_enabled and class_enabled
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// - Adds headerless-specific ENV gates
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#ifndef HAKMEM_SMALLOBJECT_V6_ENV_BOX_H
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#define HAKMEM_SMALLOBJECT_V6_ENV_BOX_H
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "tiny_route_env_box.h" // For small_heap_v6_enabled, small_heap_v6_class_enabled
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#ifndef likely
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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// ============================================================================
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// ENV: HAKMEM_SMALL_HEAP_V6_HEADERLESS
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// ============================================================================
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// Enable headerless mode for v6. Default OFF.
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// When ON:
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// - free: use RegionIdBox lookup instead of header
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// - alloc: skip header write (rely on carve-time header)
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#define V6_HEADERLESS_UNINIT (-1)
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#define V6_HEADERLESS_OFF 0
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#define V6_HEADERLESS_ON 1
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static int g_small_heap_v6_headerless = V6_HEADERLESS_UNINIT;
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static inline bool small_heap_v6_headerless_enabled(void) {
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if (unlikely(g_small_heap_v6_headerless == V6_HEADERLESS_UNINIT)) {
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const char* env = getenv("HAKMEM_SMALL_HEAP_V6_HEADERLESS");
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g_small_heap_v6_headerless = (env && env[0] == '1') ? V6_HEADERLESS_ON : V6_HEADERLESS_OFF;
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}
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return g_small_heap_v6_headerless == V6_HEADERLESS_ON;
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}
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// ============================================================================
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// ENV: HAKMEM_SMALL_V6_REGION_OBSERVE (moved from smallobject_core_v6.c)
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// ============================================================================
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// Enable OBSERVE mode for class_idx validation. Default OFF.
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#define V6_REGION_OBS_UNINIT (-1)
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#define V6_REGION_OBS_OFF 0
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#define V6_REGION_OBS_ON 1
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static int g_small_v6_region_observe_env = V6_REGION_OBS_UNINIT;
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static inline bool small_v6_region_observe_enabled(void) {
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if (unlikely(g_small_v6_region_observe_env == V6_REGION_OBS_UNINIT)) {
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const char* env = getenv("HAKMEM_SMALL_V6_REGION_OBSERVE");
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g_small_v6_region_observe_env = (env && env[0] == '1') ? V6_REGION_OBS_ON : V6_REGION_OBS_OFF;
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}
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return g_small_v6_region_observe_env == V6_REGION_OBS_ON;
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}
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// ============================================================================
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// Combined Gate: v6 headerless route enabled for class
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// ============================================================================
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/// Check if v6 headerless route is enabled for a given class
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/// Uses small_heap_v6_enabled() and small_heap_v6_class_enabled() from tiny_route_env_box.h
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/// @param class_idx: class index (4=C4, 5=C5, 6=C6)
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/// @return: true if v6 headerless free/alloc should be used
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static inline bool small_v6_headerless_route_enabled(uint8_t class_idx) {
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return small_heap_v6_enabled() &&
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small_heap_v6_headerless_enabled() &&
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small_heap_v6_class_enabled((uint32_t)class_idx);
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}
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// ============================================================================
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// Debug: Dump ENV state
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// ============================================================================
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static inline void small_v6_env_dump(void) {
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// Force init
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(void)small_heap_v6_enabled();
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(void)small_heap_v6_headerless_enabled();
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(void)small_v6_region_observe_enabled();
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fprintf(stderr, "[V6_ENV] enabled=%d headerless=%d observe=%d\n",
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small_heap_v6_enabled() ? 1 : 0,
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g_small_heap_v6_headerless == V6_HEADERLESS_ON,
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g_small_v6_region_observe_env == V6_REGION_OBS_ON);
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}
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#endif // HAKMEM_SMALLOBJECT_V6_ENV_BOX_H
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