Mark Salyzyn | be1d3c2 | 2016-03-10 08:25:33 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 17 | #ifndef _LIBLOG_PORTABILITY_H__ |
| 18 | #define _LIBLOG_PORTABILITY_H__ |
Mark Salyzyn | be1d3c2 | 2016-03-10 08:25:33 -0800 | [diff] [blame] | 19 | |
| 20 | #include <sys/cdefs.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 21 | #include <unistd.h> |
| 22 | |
| 23 | /* Helpful private sys/cdefs.h like definitions */ |
Mark Salyzyn | be1d3c2 | 2016-03-10 08:25:33 -0800 | [diff] [blame] | 24 | |
| 25 | /* Declare this library function hidden and internal */ |
| 26 | #if defined(_WIN32) |
| 27 | #define LIBLOG_HIDDEN |
| 28 | #else |
| 29 | #define LIBLOG_HIDDEN __attribute__((visibility("hidden"))) |
| 30 | #endif |
| 31 | |
| 32 | /* Declare this library function visible and external */ |
| 33 | #if defined(_WIN32) |
| 34 | #define LIBLOG_ABI_PUBLIC |
| 35 | #else |
| 36 | #define LIBLOG_ABI_PUBLIC __attribute__((visibility("default"))) |
| 37 | #endif |
| 38 | |
| 39 | /* Declare this library function visible but private */ |
| 40 | #define LIBLOG_ABI_PRIVATE LIBLOG_ABI_PUBLIC |
| 41 | |
| 42 | /* |
| 43 | * Declare this library function as reimplementation. |
| 44 | * Prevent circular dependencies, but allow _real_ library to hijack |
| 45 | */ |
| 46 | #if defined(_WIN32) |
| 47 | #define LIBLOG_WEAK static /* Accept that it is totally private */ |
| 48 | #else |
| 49 | #define LIBLOG_WEAK __attribute__((weak,visibility("default"))) |
| 50 | #endif |
| 51 | |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 52 | /* possible missing definitions in sys/cdefs.h */ |
| 53 | |
| 54 | /* DECLS */ |
| 55 | #ifndef __BEGIN_DECLS |
| 56 | #if defined(__cplusplus) |
| 57 | #define __BEGIN_DECLS extern "C" { |
| 58 | #define __END_DECLS } |
| 59 | #else |
| 60 | #define __BEGIN_DECLS |
| 61 | #define __END_DECLS |
| 62 | #endif |
| 63 | #endif |
| 64 | |
Mark Salyzyn | be1d3c2 | 2016-03-10 08:25:33 -0800 | [diff] [blame] | 65 | /* Unused argument. For C code only, remove symbol name for C++ */ |
| 66 | #ifndef __unused |
| 67 | #define __unused __attribute__((__unused__)) |
| 68 | #endif |
| 69 | |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 70 | /* possible missing definitions in unistd.h */ |
| 71 | |
| 72 | #ifndef TEMP_FAILURE_RETRY |
| 73 | /* Used to retry syscalls that can return EINTR. */ |
| 74 | #define TEMP_FAILURE_RETRY(exp) ({ \ |
| 75 | __typeof__(exp) _rc; \ |
| 76 | do { \ |
| 77 | _rc = (exp); \ |
| 78 | } while (_rc == -1 && errno == EINTR); \ |
| 79 | _rc; }) |
| 80 | #endif |
| 81 | |
| 82 | #endif /* _LIBLOG_PORTABILITY_H__ */ |