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1//===--- Definition of a type for a futex word ------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_SRC___SUPPORT_THREADS_LINUX_FUTEX_WORD_H10#define LLVM_LIBC_SRC___SUPPORT_THREADS_LINUX_FUTEX_WORD_H11 12#include "hdr/stdint_proxy.h"13#include "src/__support/macros/config.h"14#include <sys/syscall.h>15namespace LIBC_NAMESPACE_DECL {16 17// Futexes are 32 bits in size on all platforms, including 64-bit platforms.18using FutexWordType = uint32_t;19 20#if SYS_futex21constexpr auto FUTEX_SYSCALL_ID = SYS_futex;22#elif defined(SYS_futex_time64)23constexpr auto FUTEX_SYSCALL_ID = SYS_futex_time64;24#else25#error "futex and futex_time64 syscalls not available."26#endif27 28} // namespace LIBC_NAMESPACE_DECL29 30#endif // LLVM_LIBC_SRC___SUPPORT_THREADS_LINUX_FUTEX_WORD_H31