// bthread - A M:N threading library to make applications more concurrent. // Copyright (c) 2012 Baidu, Inc. // // 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. // Author: Ge,Jun (gejun@baidu.com) // Date: Tue Jul 10 17:40:58 CST 2012 #ifndef BTHREAD_SYS_FUTEX_H #define BTHREAD_SYS_FUTEX_H #include "butil/build_config.h" // OS_MACOSX #include <unistd.h> // syscall #include <time.h> // timespec #if defined(OS_LINUX) #include <syscall.h> // SYS_futex #include <linux/futex.h> // FUTEX_WAIT, FUTEX_WAKE namespace bthread { #ifndef FUTEX_PRIVATE_FLAG #define FUTEX_PRIVATE_FLAG 128 #endif inline int futex_wait_private( void* addr1, int expected, const timespec* timeout) { return syscall(SYS_futex, addr1, (FUTEX_WAIT | FUTEX_PRIVATE_FLAG), expected, timeout, NULL, 0); } inline int futex_wake_private(void* addr1, int nwake) { return syscall(SYS_futex, addr1, (FUTEX_WAKE | FUTEX_PRIVATE_FLAG), nwake, NULL, NULL, 0); } inline int futex_requeue_private(void* addr1, int nwake, void* addr2) { return syscall(SYS_futex, addr1, (FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG), nwake, NULL, addr2, 0); } } // namespace bthread #elif defined(OS_MACOSX) namespace bthread { int futex_wait_private(void* addr1, int expected, const timespec* timeout); int futex_wake_private(void* addr1, int nwake); int futex_requeue_private(void* addr1, int nwake, void* addr2); } // namespace bthread #else #error "Unsupported OS" #endif #endif // BTHREAD_SYS_FUTEX_H