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2bb7589ddf
In the next commit I'd like to reference gdb_unique_ptr within the common-utils.h file. However, this requires that I include gdb_unique_ptr.h, which requires that xfree be defined. Interestingly, gdb_unique_ptr.h doesn't actually include anything that defines xfree, but I was finding that when I added a gdb_unique_ptr.h include to common-utils.h I was getting a dependency cycle; before my change xfree was defined when gdb_unique_ptr.h was processed, while after my change it was not, and this made g++ unhappy. To break this cycle, I propose to move xfree into its own header file, gdb-xfree.h, which I'll then include into gdb_unique_ptr.h and common-utils.cc.
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
/* std::unique_ptr specializations for GDB.
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Copyright (C) 2016-2021 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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#ifndef COMMON_GDB_UNIQUE_PTR_H
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#define COMMON_GDB_UNIQUE_PTR_H
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#include <memory>
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#include "gdbsupport/gdb-xfree.h"
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namespace gdb
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{
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/* Define gdb::unique_xmalloc_ptr, a std::unique_ptr that manages
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xmalloc'ed memory. */
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/* The deleter for std::unique_xmalloc_ptr. Uses xfree. */
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template <typename T>
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struct xfree_deleter
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{
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void operator() (T *ptr) const { xfree (ptr); }
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};
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/* Same, for arrays. */
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template <typename T>
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struct xfree_deleter<T[]>
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{
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void operator() (T *ptr) const { xfree (ptr); }
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};
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/* Import the standard unique_ptr to our namespace with a custom
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deleter. */
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template<typename T> using unique_xmalloc_ptr
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= std::unique_ptr<T, xfree_deleter<T>>;
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/* A no-op deleter. */
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template<typename T>
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struct noop_deleter
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{
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void operator() (T *ptr) const { }
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};
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} /* namespace gdb */
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/* Dup STR and return a unique_xmalloc_ptr for the result. */
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static inline gdb::unique_xmalloc_ptr<char>
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make_unique_xstrdup (const char *str)
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{
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return gdb::unique_xmalloc_ptr<char> (xstrdup (str));
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}
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/* Dup the first N characters of STR and return a unique_xmalloc_ptr
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for the result. The result is always \0-terminated. */
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static inline gdb::unique_xmalloc_ptr<char>
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make_unique_xstrndup (const char *str, size_t n)
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{
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return gdb::unique_xmalloc_ptr<char> (xstrndup (str, n));
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}
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#endif /* COMMON_GDB_UNIQUE_PTR_H */
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