| 1 | /* Template to produce unique symbols. |
|---|
| 2 | Copyright (C) 2019-2022 Free Software Foundation, Inc. |
|---|
| 3 | This file is part of the GNU C Library. |
|---|
| 4 | |
|---|
| 5 | The GNU C Library is free software; you can redistribute it and/or |
|---|
| 6 | modify it under the terms of the GNU Lesser General Public |
|---|
| 7 | License as published by the Free Software Foundation; either |
|---|
| 8 | version 2.1 of the License, or (at your option) any later version. |
|---|
| 9 | |
|---|
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
|---|
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 13 | Lesser General Public License for more details. |
|---|
| 14 | |
|---|
| 15 | You should have received a copy of the GNU Lesser General Public |
|---|
| 16 | License along with the GNU C Library; if not, see |
|---|
| 17 | <https://www.gnu.org/licenses/>. */ |
|---|
| 18 | |
|---|
| 19 | /* This template produces a unique symbol definition for an explicit |
|---|
| 20 | template instantiation (without also incorporating a reference), |
|---|
| 21 | and an extern template declaration can be used to reference that |
|---|
| 22 | symbol from another object. The modid parameter is just a |
|---|
| 23 | placeholder to create different symbols (because it affects the |
|---|
| 24 | name mangling of the static value member). By convention, it |
|---|
| 25 | should match the number of the module that contains the |
|---|
| 26 | definition. */ |
|---|
| 27 | |
|---|
| 28 | template <int modid> |
|---|
| 29 | struct unique_symbol |
|---|
| 30 | { |
|---|
| 31 | static int value; |
|---|
| 32 | }; |
|---|
| 33 | |
|---|
| 34 | template <int modid> |
|---|
| 35 | int unique_symbol<modid>::value; |
|---|
| 36 | |
|---|
