| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef PORTABILITY_H_included |
| #define PORTABILITY_H_included |
| |
| #if defined(__APPLE__) |
| |
| // Mac OS. |
| #include <AvailabilityMacros.h> // For MAC_OS_X_VERSION_MAX_ALLOWED |
| |
| #include <libkern/OSByteOrder.h> |
| #define bswap_16 OSSwapInt16 |
| #define bswap_32 OSSwapInt32 |
| #define bswap_64 OSSwapInt64 |
| |
| #include <crt_externs.h> |
| #define environ (*_NSGetEnviron()) |
| |
| // Mac OS has a 64-bit off_t and no 32-bit compatibility cruft. |
| #define flock64 flock |
| #define ftruncate64 ftruncate |
| #define isnanf __inline_isnanf |
| #define lseek64 lseek |
| #define pread64 pread |
| #define pwrite64 pwrite |
| |
| // TODO: Darwin appears to have an fdatasync syscall. |
| static inline int fdatasync(int fd) { return fsync(fd); } |
| |
| // For Linux-compatible sendfile(3). |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| static inline ssize_t sendfile(int out_fd, int in_fd, off_t* offset, size_t count) { |
| off_t in_out_count = count; |
| int result = sendfile(in_fd, out_fd, *offset, &in_out_count, NULL, 0); |
| if (result == -1) { |
| return -1; |
| } |
| return in_out_count; |
| } |
| |
| // For mincore(3). |
| #define _DARWIN_C_SOURCE |
| #include <sys/mman.h> |
| #undef _DARWIN_C_SOURCE |
| static inline int mincore(void* addr, size_t length, unsigned char* vec) { |
| return mincore(addr, length, reinterpret_cast<char*>(vec)); |
| } |
| |
| // For statfs(3). |
| #include <sys/param.h> |
| #include <sys/mount.h> |
| |
| #else |
| |
| // Bionic or glibc. |
| |
| #include <byteswap.h> |
| #include <sys/sendfile.h> |
| #include <sys/statvfs.h> |
| |
| #endif |
| |
| #include <netdb.h> |
| #if defined(__BIONIC__) |
| extern "C" int android_getaddrinfofornet(const char*, const char*, const struct addrinfo*, unsigned, unsigned, struct addrinfo**); |
| #else |
| static inline int android_getaddrinfofornet(const char* hostname, const char* servname, |
| const struct addrinfo* hints, unsigned /*netid*/, unsigned /*mark*/, struct addrinfo** res) { |
| return getaddrinfo(hostname, servname, hints, res); |
| } |
| #endif |
| |
| #if defined(__GLIBC__) && !defined(__LP64__) |
| |
| #include <unistd.h> |
| |
| // 32 bit GLIBC hardcodes a "long int" as the return type for |
| // TEMP_FAILURE_RETRY so the return value here gets truncated for |
| // functions that return 64 bit types. |
| #undef TEMP_FAILURE_RETRY |
| #define TEMP_FAILURE_RETRY(exp) ({ \ |
| __typeof__(exp) _rc; \ |
| do { \ |
| _rc = (exp); \ |
| } while (_rc == -1 && errno == EINTR); \ |
| _rc; }) |
| |
| #endif // __GLIBC__ && !__LP64__ |
| |
| #endif // PORTABILITY_H_included |