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/>. */
20 #ifndef FILENAME_SEEN_CACHE_H
21 #define FILENAME_SEEN_CACHE_H
24 #include "common/function-view.h"
26 /* Cache to watch for file names already seen. */
28 class filename_seen_cache
31 filename_seen_cache ();
32 ~filename_seen_cache ();
34 DISABLE_COPY_AND_ASSIGN (filename_seen_cache
);
36 /* Empty the cache, but do not delete it. */
39 /* If FILE is not already in the table of files in CACHE, add it and
40 return false; otherwise return true.
42 NOTE: We don't manage space for FILE, we assume FILE lives as
43 long as the caller needs. */
44 bool seen (const char *file
);
46 /* Traverse all cache entries, calling CALLBACK on each. The
47 filename is passed as argument to CALLBACK. */
48 void traverse (gdb::function_view
<void (const char *filename
)> callback
)
50 auto erased_cb
= [] (void **slot
, void *info
) -> int
52 auto filename
= (const char *) *slot
;
53 auto restored_cb
= (decltype (callback
) *) info
;
54 (*restored_cb
) (filename
);
58 htab_traverse_noresize (m_tab
, erased_cb
, &callback
);
62 /* Table of files seen so far. */
66 #endif /* FILENAME_SEEN_CACHE_H */
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