64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/* Filename-seen cache for the GNU debugger, GDB.
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Copyright (C) 1986-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "common/function-view.h"
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/* Cache to watch for file names already seen. */
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class filename_seen_cache
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{
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public:
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filename_seen_cache ();
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~filename_seen_cache ();
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/* Disable copy. */
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filename_seen_cache (const filename_seen_cache &) = delete;
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void operator= (const filename_seen_cache &) = delete;
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/* Empty the cache, but do not delete it. */
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void clear ();
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/* If FILE is not already in the table of files in CACHE, add it and
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return false; otherwise return true.
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NOTE: We don't manage space for FILE, we assume FILE lives as
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long as the caller needs. */
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bool seen (const char *file);
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/* Traverse all cache entries, calling CALLBACK on each. The
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filename is passed as argument to CALLBACK. */
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void traverse (gdb::function_view<void (const char *filename)> callback)
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{
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auto erased_cb = [] (void **slot, void *info) -> int
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{
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auto filename = (const char *) *slot;
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auto restored_cb = (decltype (callback) *) info;
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(*restored_cb) (filename);
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return 1;
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};
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htab_traverse_noresize (m_tab, erased_cb, &callback);
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}
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private:
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/* Table of files seen so far. */
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htab_t m_tab;
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};
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