projects / urcu.git / blame
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| 29b2b11e MJ |
1 | # Userspace RCU library licensing |
| 2 | ||
| 3 | This project is compliant with the [REUSE](https://reuse.software/spec/) | |
| 4 | specification, each file contains [SPDX](https://spdx.org/specifications) tags, | |
| 5 | the full licenses can be found in the `LICENSES/` directory. | |
| 6 | ||
| 7 | ||
| 8 | ## Library code | |
| 9 | ||
| 10 | The library part is distributed under `LGPL-2.1-or-later`. See | |
| 11 | `LICENSES/LGPL-2.1-or-later.txt` for license details. Refer to the individual | |
| 12 | file headers for details. | |
| 13 | ||
| 14 | LGPL-compatible source code can statically use the library header using : | |
| 15 | ||
| 16 | ```` | |
| 17 | #define _LGPL_SOURCE | |
| 18 | #include <urcu.h> | |
| 19 | ```` | |
| 20 | ||
| 21 | Dynamic-only linking with the LGPL library is used if `_LGPL_SOURCE` is not | |
| 22 | defined. It permits relinking with newer versions of the library, which is | |
| 23 | required by the LGPL license. | |
| 24 | ||
| 25 | See `lgpl-relicensing.md` for details. | |
| 26 | ||
| 27 | ||
| 28 | ## Headers | |
| 29 | ||
| 30 | Most headers are also distributed under `LGPL-2.1-or-later`, some include code | |
| 31 | from `atomic_ops` and are distributed under `Boehm-GC` and some others are | |
| 32 | distributed under `MIT`. Refer to the individual file headers for details. | |
| 33 | ||
| 34 | xchg() primitive has been rewritten from scratch starting from `atomic_ops 1.2` | |
| 35 | which has a MIT-style license that is intended to allow use in both free and | |
| 36 | proprietary software: | |
| 37 | ||
| 38 | ```` | |
| 39 | http://www.hpl.hp.com/research/linux/atomic_ops/LICENSING.txt | |
| 40 | http://www.hpl.hp.com/personal/Hans_Boehm/gc/gc_source/ | |
| 41 | ```` | |
| 42 | ||
| 43 | ||
| 44 | ## Tests | |
| 45 | ||
| 46 | Library test code is distributed under the `GPL-2.0-only` license. See | |
| 47 | `LICENSES/GPL-2.0-only.txt` for license details. See headers of individual | |
| 48 | files under `tests/` for details. | |
| 49 | ||
| 50 | ||
| 51 | ## Documentation | |
| 52 | ||
| 53 | The documentation is distributed under the `CC-BY-4.0` license. | |
| 54 | ||
| 55 | ||
| 56 | ## Build system | |
| 57 | ||
| 58 | Build system related files are mostly distributed under the `MIT` license. See | |
| 59 | headers of individual files for details. | |
| 60 | ||
| 61 | ||
| 62 | ## Generated data files | |
| 63 | ||
| 64 | Generated data files are distributed under the `CC-1.0` license. |