| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 BUTIL_COMPAT_H |
| #define BUTIL_COMPAT_H |
| |
| #include "butil/build_config.h" |
| #include <pthread.h> |
| |
| #if defined(OS_MACOSX) |
| |
| #include <sys/cdefs.h> |
| #include <stdint.h> |
| #include <dispatch/dispatch.h> // dispatch_semaphore |
| #include <errno.h> // EINVAL |
| |
| __BEGIN_DECLS |
| |
| // Implement pthread_spinlock_t for MAC. |
| struct pthread_spinlock_t { |
| dispatch_semaphore_t sem; |
| }; |
| inline int pthread_spin_init(pthread_spinlock_t *__lock, int __pshared) { |
| if (__pshared != 0) { |
| return EINVAL; |
| } |
| __lock->sem = dispatch_semaphore_create(1); |
| return 0; |
| } |
| inline int pthread_spin_destroy(pthread_spinlock_t *__lock) { |
| // TODO(gejun): Not see any destructive API on dispatch_semaphore |
| (void)__lock; |
| return 0; |
| } |
| inline int pthread_spin_lock(pthread_spinlock_t *__lock) { |
| return (int)dispatch_semaphore_wait(__lock->sem, DISPATCH_TIME_FOREVER); |
| } |
| inline int pthread_spin_trylock(pthread_spinlock_t *__lock) { |
| if (dispatch_semaphore_wait(__lock->sem, DISPATCH_TIME_NOW) == 0) { |
| return 0; |
| } |
| return EBUSY; |
| } |
| inline int pthread_spin_unlock(pthread_spinlock_t *__lock) { |
| return dispatch_semaphore_signal(__lock->sem); |
| } |
| |
| __END_DECLS |
| |
| #elif defined(OS_LINUX) |
| |
| #include <sys/epoll.h> |
| |
| #else |
| |
| #error "The platform does not support epoll-like APIs" |
| |
| #endif // defined(OS_MACOSX) |
| |
| __BEGIN_DECLS |
| |
| inline uint64_t pthread_numeric_id() { |
| #if defined(OS_MACOSX) |
| uint64_t id; |
| if (pthread_threadid_np(pthread_self(), &id) == 0) { |
| return id; |
| } |
| return -1; |
| #else |
| return pthread_self(); |
| #endif |
| } |
| |
| __END_DECLS |
| |
| #endif // BUTIL_COMPAT_H |