projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 92f5a8d4 | 1 | /* C interface for result |
| f67539c2 | 2 | (C) 2017-2020 Niall Douglas <http://www.nedproductions.biz/> (6 commits) |
| 92f5a8d4 TL |
3 | File Created: Aug 2017 |
| 4 | ||
| 5 | ||
| 6 | Boost Software License - Version 1.0 - August 17th, 2003 | |
| 7 | ||
| 8 | Permission is hereby granted, free of charge, to any person or organization | |
| 9 | obtaining a copy of the software and accompanying documentation covered by | |
| 10 | this license (the "Software") to use, reproduce, display, distribute, | |
| 11 | execute, and transmit the Software, and to prepare derivative works of the | |
| 12 | Software, and to permit third-parties to whom the Software is furnished to | |
| 13 | do so, all subject to the following: | |
| 14 | ||
| 15 | The copyright notices in the Software and this entire statement, including | |
| 16 | the above license grant, this restriction and the following disclaimer, | |
| 17 | must be included in all copies of the Software, in whole or in part, and | |
| 18 | all derivative works of the Software, unless such copies or derivative | |
| 19 | works are solely in the form of machine-executable object code generated by | |
| 20 | a source language processor. | |
| 21 | ||
| 22 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 23 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 24 | FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT | |
| 25 | SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE | |
| 26 | FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, | |
| 27 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
| 28 | DEALINGS IN THE SOFTWARE. | |
| 29 | */ | |
| 30 | ||
| 31 | #ifndef BOOST_OUTCOME_EXPERIMENTAL_RESULT_H | |
| 32 | #define BOOST_OUTCOME_EXPERIMENTAL_RESULT_H | |
| 33 | ||
| 34 | #include <stdint.h> // for intptr_t | |
| 35 | ||
| 36 | #define BOOST_OUTCOME_C_DECLARE_RESULT(ident, R, S) \ | |
| 37 | struct cxx_result_##ident \ | |
| 38 | { \ | |
| 39 | R value; \ | |
| 40 | unsigned flags; \ | |
| 41 | S error; \ | |
| 42 | } | |
| 43 | ||
| 44 | #define BOOST_OUTCOME_C_RESULT(ident) struct cxx_result_##ident | |
| 45 | ||
| 46 | ||
| 47 | #define BOOST_OUTCOME_C_RESULT_HAS_VALUE(r) (((r).flags & 1U) == 1U) | |
| 48 | ||
| 49 | #define BOOST_OUTCOME_C_RESULT_HAS_ERROR(r) (((r).flags & 2U) == 2U) | |
| 50 | ||
| 51 | #define BOOST_OUTCOME_C_RESULT_ERROR_IS_ERRNO(r) (((r).flags & (1U << 4U)) == (1U << 4U)) | |
| 52 | ||
| 53 | ||
| 54 | /***************************** <system_error2> support ******************************/ | |
| 55 | ||
| 56 | #define BOOST_OUTCOME_C_DECLARE_STATUS_CODE(ident, value_type) \ | |
| 57 | struct cxx_status_code_##ident \ | |
| 58 | { \ | |
| 59 | void *domain; \ | |
| 60 | value_type value; \ | |
| 61 | }; | |
| 62 | ||
| 63 | #define BOOST_OUTCOME_C_STATUS_CODE(ident) struct cxx_status_code_##ident | |
| 64 | ||
| 65 | ||
| 66 | struct cxx_status_code_posix | |
| 67 | { | |
| 68 | void *domain; | |
| 69 | int value; | |
| 70 | }; | |
| 71 | #define BOOST_OUTCOME_C_DECLARE_RESULT_ERRNO(ident, R) BOOST_OUTCOME_C_DECLARE_RESULT(posix_##ident, R, struct cxx_status_code_posix) | |
| 72 | #define BOOST_OUTCOME_C_RESULT_ERRNO(ident) BOOST_OUTCOME_C_RESULT(posix_##ident) | |
| 73 | ||
| 74 | struct cxx_status_code_system | |
| 75 | { | |
| 76 | void *domain; | |
| 77 | intptr_t value; | |
| 78 | }; | |
| 79 | #define BOOST_OUTCOME_C_DECLARE_RESULT_SYSTEM(ident, R) BOOST_OUTCOME_C_DECLARE_RESULT(system_##ident, R, struct cxx_status_code_system) | |
| 80 | #define BOOST_OUTCOME_C_RESULT_SYSTEM(ident) BOOST_OUTCOME_C_RESULT(system_##ident) | |
| 81 | ||
| 82 | #endif |