llvm/libc/src/__support/CPP/mutex.h

//===--- A self contained equivalent of std::mutex --------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_SRC___SUPPORT_CPP_MUTEX_H
#define LLVM_LIBC_SRC___SUPPORT_CPP_MUTEX_H

#include "src/__support/macros/config.h"

namespace LIBC_NAMESPACE_DECL {
namespace cpp {

// Assume the calling thread has already obtained mutex ownership.
struct adopt_lock_t { … };

// Tag used to make a scoped lock take ownership of a locked mutex.
constexpr adopt_lock_t adopt_lock{ … };

// An RAII class for easy locking and unlocking of mutexes.
template <typename MutexType> class lock_guard { … };

// Deduction guide for lock_guard to suppress CTAD warnings.
template <typename T> lock_guard(T &) -> lock_guard<T>;

} // namespace cpp
} // namespace LIBC_NAMESPACE_DECL

#endif // LLVM_LIBC_SRC___SUPPORT_CPP_MUTEX_H