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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364/* SPDX-License-Identifier: GPL-2.0 */#ifndef _FS_CEPH_STRING_TABLE_H#define _FS_CEPH_STRING_TABLE_H
#include <linux/types.h>#include <linux/kref.h>#include <linux/rbtree.h>#include <linux/rcupdate.h>
struct ceph_string { struct kref kref; union { struct rb_node node; struct rcu_head rcu; }; size_t len; char str[];};
extern void ceph_release_string(struct kref *ref);extern struct ceph_string *ceph_find_or_create_string(const char *str, size_t len);extern bool ceph_strings_empty(void);
static inline struct ceph_string *ceph_get_string(struct ceph_string *str){ kref_get(&str->kref); return str;}
static inline void ceph_put_string(struct ceph_string *str){ if (!str) return; kref_put(&str->kref, ceph_release_string);}
static inline int ceph_compare_string(struct ceph_string *cs, const char* str, size_t len){ size_t cs_len = cs ? cs->len : 0; if (cs_len != len) return cs_len - len; if (len == 0) return 0; return strncmp(cs->str, str, len);}
#define ceph_try_get_string(x) \({ \ struct ceph_string *___str; \ rcu_read_lock(); \ for (;;) { \ ___str = rcu_dereference(x); \ if (!___str || \ kref_get_unless_zero(&___str->kref)) \ break; \ } \ rcu_read_unlock(); \ (___str); \})
#endif