| 1 | //===--- Definition of a type for a futex word ------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLVM_LIBC_SRC___SUPPORT_THREADS_LINUX_FUTEX_WORD_H |
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| 10 | #define LLVM_LIBC_SRC___SUPPORT_THREADS_LINUX_FUTEX_WORD_H |
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| 11 | |
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| 12 | #include <stdint.h> |
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| 13 | #include <sys/syscall.h> |
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| 14 | |
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| 15 | namespace LIBC_NAMESPACE { |
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| 16 | |
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| 17 | // Futexes are 32 bits in size on all platforms, including 64-bit platforms. |
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| 18 | using FutexWordType = uint32_t; |
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| 19 | |
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| 20 | #if SYS_futex |
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| 21 | constexpr auto FUTEX_SYSCALL_ID = SYS_futex; |
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| 22 | #elif defined(SYS_futex_time64) |
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| 23 | constexpr auto FUTEX_SYSCALL_ID = SYS_futex_time64; |
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| 24 | #else |
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| 25 | #error "futex and futex_time64 syscalls not available." |
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| 26 | #endif |
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| 27 | |
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| 28 | } // namespace LIBC_NAMESPACE |
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| 29 | |
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| 30 | #endif // LLVM_LIBC_SRC___SUPPORT_THREADS_LINUX_FUTEX_WORD_H |
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| 31 | |
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