| // Mutex pool used to limit contention -*- C++ -*- | |
| // Copyright (C) 2016-2026 Free Software Foundation, Inc. | |
| // | |
| // This file is part of the GNU ISO C++ Library. This library 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, or (at your option) | |
| // any later version. | |
| // This library 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. | |
| // Under Section 7 of GPL version 3, you are granted additional | |
| // permissions described in the GCC Runtime Library Exception, version | |
| // 3.1, as published by the Free Software Foundation. | |
| // You should have received a copy of the GNU General Public License and | |
| // a copy of the GCC Runtime Library Exception along with this program; | |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| // <http://www.gnu.org/licenses/>. | |
| namespace __gnu_internal _GLIBCXX_VISIBILITY(hidden) | |
| { | |
| const unsigned char mask = 0xf; | |
| const unsigned char invalid = mask + 1; | |
| /* Returns different instances of __mutex depending on the passed index | |
| * in order to limit contention. | |
| */ | |
| __gnu_cxx::__mutex& get_mutex(unsigned char i); | |
| } |