Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754681AbZGKPSw (ORCPT ); Sat, 11 Jul 2009 11:18:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751489AbZGKPSm (ORCPT ); Sat, 11 Jul 2009 11:18:42 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:35222 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751211AbZGKPSl (ORCPT ); Sat, 11 Jul 2009 11:18:41 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org Subject: [PATCH tip 2/5] strlist: Introduce strlist__entry and strlist__nr_entries methods Date: Sat, 11 Jul 2009 12:18:34 -0300 Message-Id: <1247325517-12272-2-git-send-email-acme@redhat.com> X-Mailer: git-send-email 1.6.2.5 In-Reply-To: <1247325517-12272-1-git-send-email-acme@redhat.com> References: <1247325517-12272-1-git-send-email-acme@redhat.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3086 Lines: 99 The strlist__entry method allows accessing strlists like an array, will be used in the 'perf report' to access the first entry. We now keep the nr_entries so that we can check if we have just one entry, will be used in 'perf report' to improve the output by showing just at the top when we have just, say, one DSO. While at it use nr_entries to optimize strlist__is_empty by not using the far more costly rb_first based implementation. Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/strlist.c | 20 ++++++++++++++++++-- tools/perf/util/strlist.h | 11 +++++++++-- 2 files changed, 27 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/strlist.c b/tools/perf/util/strlist.c index 025a78e..7ad3817 100644 --- a/tools/perf/util/strlist.c +++ b/tools/perf/util/strlist.c @@ -64,6 +64,7 @@ int strlist__add(struct strlist *self, const char *new_entry) rb_link_node(&sn->rb_node, parent, p); rb_insert_color(&sn->rb_node, &self->entries); + ++self->nr_entries; return 0; } @@ -155,8 +156,9 @@ struct strlist *strlist__new(bool dupstr, const char *slist) struct strlist *self = malloc(sizeof(*self)); if (self != NULL) { - self->entries = RB_ROOT; - self->dupstr = dupstr; + self->entries = RB_ROOT; + self->dupstr = dupstr; + self->nr_entries = 0; if (slist && strlist__parse_list(self, slist) != 0) goto out_error; } @@ -182,3 +184,17 @@ void strlist__delete(struct strlist *self) free(self); } } + +struct str_node *strlist__entry(const struct strlist *self, unsigned int idx) +{ + struct rb_node *nd; + + for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) { + struct str_node *pos = rb_entry(nd, struct str_node, rb_node); + + if (!idx--) + return pos; + } + + return NULL; +} diff --git a/tools/perf/util/strlist.h b/tools/perf/util/strlist.h index 2fdcfee..921818e 100644 --- a/tools/perf/util/strlist.h +++ b/tools/perf/util/strlist.h @@ -11,7 +11,8 @@ struct str_node { struct strlist { struct rb_root entries; - bool dupstr; + unsigned int nr_entries; + bool dupstr; }; struct strlist *strlist__new(bool dupstr, const char *slist); @@ -21,11 +22,17 @@ void strlist__remove(struct strlist *self, struct str_node *sn); int strlist__load(struct strlist *self, const char *filename); int strlist__add(struct strlist *self, const char *str); +struct str_node *strlist__entry(const struct strlist *self, unsigned int idx); bool strlist__has_entry(struct strlist *self, const char *entry); static inline bool strlist__empty(const struct strlist *self) { - return rb_first(&self->entries) == NULL; + return self->nr_entries == 0; +} + +static inline unsigned int strlist__nr_entries(const struct strlist *self) +{ + return self->nr_entries; } int strlist__parse_list(struct strlist *self, const char *s); -- 1.6.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/