1 /* Filename-seen cache for the GNU debugger, GDB.
3 Copyright (C) 1986-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "common/function-view.h"
23 /* Cache to watch for file names already seen. */
25 class filename_seen_cache
28 filename_seen_cache ();
29 ~filename_seen_cache ();
31 DISABLE_COPY_AND_ASSIGN (filename_seen_cache
);
33 /* Empty the cache, but do not delete it. */
36 /* If FILE is not already in the table of files in CACHE, add it and
37 return false; otherwise return true.
39 NOTE: We don't manage space for FILE, we assume FILE lives as
40 long as the caller needs. */
41 bool seen (const char *file
);
43 /* Traverse all cache entries, calling CALLBACK on each. The
44 filename is passed as argument to CALLBACK. */
45 void traverse (gdb::function_view
<void (const char *filename
)> callback
)
47 auto erased_cb
= [] (void **slot
, void *info
) -> int
49 auto filename
= (const char *) *slot
;
50 auto restored_cb
= (decltype (callback
) *) info
;
51 (*restored_cb
) (filename
);
55 htab_traverse_noresize (m_tab
, erased_cb
, &callback
);
59 /* Table of files seen so far. */
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