| /* Filename-seen cache for the GNU debugger, GDB. |
| |
| Copyright (C) 1986-2024 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef FILENAME_SEEN_CACHE_H |
| #define FILENAME_SEEN_CACHE_H |
| |
| #include "gdbsupport/function-view.h" |
| #include "gdbsupport/gdb-hashtab.h" |
| |
| /* Cache to watch for file names already seen. */ |
| |
| class filename_seen_cache |
| { |
| public: |
| filename_seen_cache (); |
| |
| DISABLE_COPY_AND_ASSIGN (filename_seen_cache); |
| |
| /* Empty the cache, but do not delete it. */ |
| void clear (); |
| |
| /* If FILE is not already in the table of files in CACHE, add it and |
| return false; otherwise return true. |
| |
| NOTE: We don't manage space for FILE, we assume FILE lives as |
| long as the caller needs. */ |
| bool seen (const char *file); |
| |
| /* Traverse all cache entries, calling CALLBACK on each. The |
| filename is passed as argument to CALLBACK. */ |
| void traverse (gdb::function_view<void (const char *filename)> callback) |
| { |
| auto erased_cb = [] (void **slot, void *info) -> int |
| { |
| auto filename = (const char *) *slot; |
| auto restored_cb = (decltype (callback) *) info; |
| (*restored_cb) (filename); |
| return 1; |
| }; |
| |
| htab_traverse_noresize (m_tab.get (), erased_cb, &callback); |
| } |
| |
| private: |
| /* Table of files seen so far. */ |
| htab_up m_tab; |
| }; |
| |
| #endif /* FILENAME_SEEN_CACHE_H */ |