1 /* 2 * Copyright (C) 2012 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 #ifndef PORTABILITY_H_included 18 #define PORTABILITY_H_included 19 20 #if defined(__APPLE__) 21 22 // Mac OS. 23 #include <AvailabilityMacros.h> // For MAC_OS_X_VERSION_MAX_ALLOWED 24 25 #include <libkern/OSByteOrder.h> 26 #define bswap_16 OSSwapInt16 27 #define bswap_32 OSSwapInt32 28 #define bswap_64 OSSwapInt64 29 30 #include <crt_externs.h> 31 #define environ (*_NSGetEnviron()) 32 33 // Mac OS has a 64-bit off_t and no 32-bit compatibility cruft. 34 #define flock64 flock 35 #define ftruncate64 ftruncate 36 #define isnanf __inline_isnanf 37 #define lseek64 lseek 38 #define pread64 pread 39 #define pwrite64 pwrite 40 41 // TODO: Darwin appears to have an fdatasync syscall. 42 static inline int fdatasync(int fd) { return fsync(fd); } 43 44 // For Linux-compatible sendfile(3). 45 #include <sys/socket.h> 46 #include <sys/types.h> 47 static inline ssize_t sendfile(int out_fd, int in_fd, off_t* offset, size_t count) { 48 off_t in_out_count = count; 49 int result = sendfile(in_fd, out_fd, *offset, &in_out_count, NULL, 0); 50 if (result == -1) { 51 return -1; 52 } 53 return in_out_count; 54 } 55 56 // For mincore(3). 57 #define _DARWIN_C_SOURCE 58 #include <sys/mman.h> 59 #undef _DARWIN_C_SOURCE 60 static inline int mincore(void* addr, size_t length, unsigned char* vec) { 61 return mincore(addr, length, reinterpret_cast<char*>(vec)); 62 } 63 64 // For statfs(3). 65 #include <sys/param.h> 66 #include <sys/mount.h> 67 #define f_frsize f_bsize // TODO: close enough? 68 69 #else 70 71 // Bionic or glibc. 72 73 #include <byteswap.h> 74 #include <sys/sendfile.h> 75 76 // For statfs(3). 77 #include <sys/vfs.h> // Bionic doesn't have <sys/statvfs.h> 78 79 #endif 80 81 #endif // PORTABILITY_H_included 82
