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 17 #pragma once 18 19 #include <sys/cdefs.h> 20 #include <unistd.h> 21 22 /* 23 * Declare this library function as reimplementation. 24 * Prevent circular dependencies, but allow _real_ library to hijack 25 */ 26 #if defined(_WIN32) 27 #define LIBLOG_WEAK static /* Accept that it is totally private */ 28 #else 29 #define LIBLOG_WEAK extern "C" __attribute__((weak, visibility("default"))) 30 #endif 31 32 /* possible missing definitions in sys/cdefs.h */ 33 34 /* DECLS */ 35 #ifndef __BEGIN_DECLS 36 #if defined(__cplusplus) 37 #define __BEGIN_DECLS extern "C" { 38 #define __END_DECLS } 39 #else 40 #define __BEGIN_DECLS 41 #define __END_DECLS 42 #endif 43 #endif 44 45 /* possible missing definitions in unistd.h */ 46 47 #ifndef TEMP_FAILURE_RETRY 48 /* Used to retry syscalls that can return EINTR. */ 49 #define TEMP_FAILURE_RETRY(exp) \ 50 ({ \ 51 __typeof__(exp) _rc; \ 52 do { \ 53 _rc = (exp); \ 54 } while (_rc == -1 && errno == EINTR); \ 55 _rc; \ 56 }) 57 #endif 58