//===--- AlignedAllocation.h - Aligned Allocation ---------------*- 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

//

//===----------------------------------------------------------------------===//

///

/// \file

/// Defines a function that returns the minimum OS versions supporting

/// C++17's aligned allocation functions.

///

//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_BASIC_ALIGNEDALLOCATION_H

#define LLVM_CLANG_BASIC_ALIGNEDALLOCATION_H

#include "llvm/ADT/Triple.h"

#include "llvm/Support/ErrorHandling.h"

#include "llvm/Support/VersionTuple.h"

namespace clang {

inline llvm::VersionTuple alignedAllocMinVersion(llvm::Triple::OSType OS) {

  switch (OS) {

  default:

    break;

  case llvm::Triple::Darwin:

  case llvm::Triple::MacOSX: // Earliest supporting version is 10.13.

    return llvm::VersionTuple(10U, 13U);

  case llvm::Triple::IOS:

  case llvm::Triple::TvOS: // Earliest supporting version is 11.0.0.

    return llvm::VersionTuple(11U);

  case llvm::Triple::WatchOS: // Earliest supporting version is 4.0.0.

    return llvm::VersionTuple(4U);

  case llvm::Triple::ZOS:

    return llvm::VersionTuple(); // All z/OS versions have no support.

  }

  llvm_unreachable("Unexpected OS");

}

} // end namespace clang

#endif // LLVM_CLANG_BASIC_ALIGNEDALLOCATION_H