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ca2270292e
At the cost of an extra pointer, we can avoid the O(logN) cost of finding the first element in the tree (smallest node), which is something required for any of the strlist or intlist traversals (XXX_for_each_entry()). There are a number of users in perf of these (particularly strlists), including probes, and buildid. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20181206191819.30182-5-dave@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_STRLIST_H
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#define __PERF_STRLIST_H
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#include <linux/rbtree.h>
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#include <stdbool.h>
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#include "rblist.h"
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struct str_node {
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struct rb_node rb_node;
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const char *s;
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};
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struct strlist {
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struct rblist rblist;
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bool dupstr;
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bool file_only;
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};
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/*
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* @file_only: When dirname is present, only consider entries as filenames,
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* that should not be added to the list if dirname/entry is not
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* found
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*/
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struct strlist_config {
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bool dont_dupstr;
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bool file_only;
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const char *dirname;
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};
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struct strlist *strlist__new(const char *slist, const struct strlist_config *config);
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void strlist__delete(struct strlist *slist);
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void strlist__remove(struct strlist *slist, struct str_node *sn);
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int strlist__load(struct strlist *slist, const char *filename);
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int strlist__add(struct strlist *slist, const char *str);
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struct str_node *strlist__entry(const struct strlist *slist, unsigned int idx);
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struct str_node *strlist__find(struct strlist *slist, const char *entry);
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static inline bool strlist__has_entry(struct strlist *slist, const char *entry)
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{
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return strlist__find(slist, entry) != NULL;
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}
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static inline bool strlist__empty(const struct strlist *slist)
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{
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return rblist__empty(&slist->rblist);
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}
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static inline unsigned int strlist__nr_entries(const struct strlist *slist)
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{
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return rblist__nr_entries(&slist->rblist);
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}
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/* For strlist iteration */
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static inline struct str_node *strlist__first(struct strlist *slist)
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{
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struct rb_node *rn = rb_first_cached(&slist->rblist.entries);
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return rn ? rb_entry(rn, struct str_node, rb_node) : NULL;
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}
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static inline struct str_node *strlist__next(struct str_node *sn)
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{
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struct rb_node *rn;
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if (!sn)
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return NULL;
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rn = rb_next(&sn->rb_node);
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return rn ? rb_entry(rn, struct str_node, rb_node) : NULL;
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}
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/**
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* strlist_for_each - iterate over a strlist
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* @pos: the &struct str_node to use as a loop cursor.
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* @slist: the &struct strlist for loop.
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*/
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#define strlist__for_each_entry(pos, slist) \
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for (pos = strlist__first(slist); pos; pos = strlist__next(pos))
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/**
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* strlist_for_each_safe - iterate over a strlist safe against removal of
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* str_node
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* @pos: the &struct str_node to use as a loop cursor.
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* @n: another &struct str_node to use as temporary storage.
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* @slist: the &struct strlist for loop.
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*/
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#define strlist__for_each_entry_safe(pos, n, slist) \
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for (pos = strlist__first(slist), n = strlist__next(pos); pos;\
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pos = n, n = strlist__next(n))
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#endif /* __PERF_STRLIST_H */
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