57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
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// smallobject_v5_env_box.h - SmallObject v5 環境ゲート（Phase v5-0）
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//
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// ENV ベース: HAKMEM_SMALL_HEAP_V5_ENABLED, HAKMEM_SMALL_HEAP_V5_CLASSES
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#ifndef HAKMEM_SMALLOBJECT_V5_ENV_BOX_H
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#define HAKMEM_SMALLOBJECT_V5_ENV_BOX_H
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#include <stdlib.h>
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#include <string.h>
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// small_heap_v5_enabled() - グローバル v5 enable check
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static inline int small_heap_v5_enabled(void) {
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static int g_enabled = -1;
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if (g_enabled == -1) {
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const char* e = getenv("HAKMEM_SMALL_HEAP_V5_ENABLED");
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g_enabled = (e && *e && *e != '0') ? 1 : 0;
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}
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return g_enabled;
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}
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// small_heap_v5_class_mask() - v5 対象クラスのビットマスク
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static inline uint32_t small_heap_v5_class_mask(void) {
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static uint32_t g_mask = (uint32_t)-1; // sentinel
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if (g_mask == (uint32_t)-1) {
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const char* e = getenv("HAKMEM_SMALL_HEAP_V5_CLASSES");
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if (e && *e) {
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g_mask = (uint32_t)strtoul(e, NULL, 0);
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} else {
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g_mask = 0x0; // default: OFF
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}
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}
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return g_mask;
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}
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// small_heap_v5_class_enabled() - 指定クラスが v5 有効か
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static inline int small_heap_v5_class_enabled(uint32_t class_idx) {
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if (class_idx >= 8) return 0;
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if (!small_heap_v5_enabled()) return 0;
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uint32_t mask = small_heap_v5_class_mask();
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return (mask & (1u << class_idx)) ? 1 : 0;
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}
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// 便利関数
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static inline int small_heap_v5_c6_enabled(void) {
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return small_heap_v5_class_enabled(6);
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}
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static inline int small_heap_v5_c5_enabled(void) {
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return small_heap_v5_class_enabled(5);
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}
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static inline int small_heap_v5_c7_enabled(void) {
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return small_heap_v5_class_enabled(7);
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}
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#endif // HAKMEM_SMALLOBJECT_V5_ENV_BOX_H
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