| /* |
| * Copyright (C) 2016 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 ANDROID_AUDIO_FUTEX_H |
| #define ANDROID_AUDIO_FUTEX_H |
| |
| // FIXME futex portion is not supported on macOS, should use the macOS alternative |
| |
| #ifdef __linux__ |
| #include <unistd.h> |
| #include <linux/futex.h> |
| #include <sys/syscall.h> |
| #else |
| #include <errno.h> |
| #define FUTEX_WAIT 0 |
| #define FUTEX_WAIT_PRIVATE 0 |
| #define FUTEX_WAKE 0 |
| #define FUTEX_WAKE_PRIVATE 0 |
| #endif |
| |
| static inline |
| int sys_futex(void *addr1, int op, int val1, const struct timespec *timeout, void *addr2, |
| int val3) |
| { |
| #ifdef __linux__ |
| return syscall(SYS_futex, addr1, op, val1, timeout, addr2, val3); |
| #else // __linux__ |
| // macOS doesn't have futex |
| (void) addr1; |
| (void) op; |
| (void) val1; |
| (void) timeout; |
| (void) addr2; |
| (void) val3; |
| errno = ENOSYS; |
| return -1; |
| #endif // __linux__ |
| } |
| |
| #endif // !ANDROID_AUDIO_FUTEX_H |