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Diffstat (limited to '')
-rw-r--r-- | gnulib-tests/localename-table.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gnulib-tests/localename-table.h b/gnulib-tests/localename-table.h new file mode 100644 index 0000000..cfc297c --- /dev/null +++ b/gnulib-tests/localename-table.h @@ -0,0 +1,69 @@ +/* Table that maps a locale object to the names of the locale categories. + Copyright (C) 2018-2022 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible <bruno@clisp.org>, 2018. */ + +#if HAVE_WORKING_USELOCALE && HAVE_NAMELESS_LOCALES + +# include <stddef.h> +# include <locale.h> + +# include "glthread/lock.h" + +struct locale_categories_names + { + /* Locale category -> name (allocated with indefinite extent). */ + const char *category_name[6]; + }; + +/* A hash table of fixed size. Multiple threads can access it read-only + simultaneously, but only one thread can insert into it or remove from it + at the same time. + This hash table has global scope, so that when an application uses both + GNU libintl and gnulib, the application sees only one hash table. (When + linking statically with libintl, the fact that localename-table.c is a + separate compilation unit resolves the duplicate symbol conflict. When + linking with libintl as a shared library, we rely on ELF and the symbol + conflict resolution implemented in the ELF dynamic loader here.) + Both the libintl overrides and the gnulib overrides of the functions + newlocale, duplocale, freelocale see the same hash table (and the same lock). + For this reason, the internal layout of the hash table and the hash function + MUST NEVER CHANGE. If you need to change the internal layout or the hash + function, introduce versioning by appending a version suffix to the symbols + at the linker level. */ +# define locale_hash_function libintl_locale_hash_function +# define locale_hash_table libintl_locale_hash_table +# define locale_lock libintl_locale_lock + +extern size_t _GL_ATTRIBUTE_CONST locale_hash_function (locale_t x); + +/* A node in a hash bucket collision list. */ +struct locale_hash_node + { + struct locale_hash_node *next; + locale_t locale; + struct locale_categories_names names; + }; + +# define LOCALE_HASH_TABLE_SIZE 101 +extern struct locale_hash_node * locale_hash_table[LOCALE_HASH_TABLE_SIZE]; + +/* This lock protects the locale_hash_table against multiple simultaneous + accesses (except that multiple simultaneous read accesses are allowed). */ + +gl_rwlock_define(extern, locale_lock) + +#endif |