Rongsong Shen
eaf1801d6d
Add kvtab_foreach walk primitive (P0-14) to kv.c/kv.h, then implement kvmgr_capture_keys in kvmgr.c that deep-copies all key→index mappings into a malloc'd slot_key_t[] array safe to read after the write lock is released during checkpoint serialization (Part 3.8). Key design points: - Both kvtab_foreach and kvmgr_capture_keys take var (RTTI data pointer) and use RTTI_DATA_TO_OBJ internally — the RTTI framework's makeInstance returns the data region pointer, not the meta_obj_t header pointer - String keys are copied via strncpy into slot_key_t.key[XCE_MAXNAME_LEN] - Integer keys are formatted as decimal strings via snprintf - Two-pass approach: count live entries first, allocate, then fill - Tests cover string kvmgr (3 entries), empty kvmgr, and deep-copy safety
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
#if !defined(_KV_H_)
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#define _KV_H_ 1
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#include <rtti.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys/types.h>
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typedef uint32_t (*kv_key_hash_fn_t)(void*);
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typedef int (*kv_key_assign_fn_t)(void**, void*);
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typedef int (*kv_key_cmp_fn_t)(void*, void*);
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typedef void (*kv_key_destroy_fn_t)(void*);
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typedef struct {
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kv_key_hash_fn_t hash;
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kv_key_assign_fn_t assign;
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kv_key_cmp_fn_t cmp;
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kv_key_destroy_fn_t destroy;
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} kv_key_ops_t;
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typedef struct {
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uint32_t nslots;
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kv_key_ops_t* keyops;
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destroy_fn_t datakiller;
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} kv_params_t;
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extern typeinfo_t kvtab_type;
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extern kv_key_ops_t int_key_ops;
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extern kv_key_ops_t string_key_ops;
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extern int key_cmp_default(void*, void*, size_t);
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/*
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* kvtab_foreach — iterate every live entry in the kvtab (P0-14).
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*
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* For each entry, cb(key, index, arg) is called.
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* - key : the raw key pointer stored in the entry (char* for
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* string-keyed tables, (void*)(long)intval for int-keyed).
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* - index : the slot index stored as the entry value.
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* - arg : caller-supplied context.
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*
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* Iteration order is unspecified.
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* Returns the number of entries visited, or -EINVAL if kvtab is NULL.
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*/
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typedef void (*kvtab_foreach_fn_t)(void* key, int index, void* arg);
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extern int kvtab_foreach(var kvtab,
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kvtab_foreach_fn_t cb,
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void* arg);
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#endif
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