| /* |
| * include/haproxy/xref-t.h |
| * Atomic cross-references between two elements - types |
| * |
| * Copyright (C) 2017 Thierry Fournier <thierry.fournier@ozon.io> |
| * Copyright (C) 2020 Willy Tarreau - w@1wt.eu |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| #ifndef __HAPROXY_XREF_T_H__ |
| #define __HAPROXY_XREF_T_H__ |
| |
| /* xref is used to create relation between two elements. |
| * Once an element is released, it breaks the relation. If the |
| * relation is already broken, it frees the xref struct. |
| * The pointer between two elements is sort of a refcount with |
| * max value 1. The relation is only between two elements. |
| * The pointer and the type of elements a and b are conventional. |
| */ |
| |
| #define XREF_BUSY ((struct xref *)1) |
| |
| struct xref { |
| struct xref *peer; |
| }; |
| |
| #endif /* __HAPROXY_XREF_T_H__ */ |