include/swift/SIL/SILAllocated.h

//===--- SILAllocated.h - Defines the SILAllocated class --------*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

#ifndef SWIFT_SIL_SILALLOCATED_H
#define SWIFT_SIL_SILALLOCATED_H

#include "swift/Basic/LLVM.h"
#include "swift/Basic/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include <stddef.h>

namespace swift {
  class SILModule;

/// SILAllocated - This class enforces that derived classes are allocated out of
/// the SILModule bump pointer allocator.
template <typename DERIVED>
class SILAllocated {
public:
  /// Disable non-placement new.
  void *operator new(size_t) = delete;
  void *operator new[](size_t) = delete;

  /// Disable non-placement delete.
  void operator delete(void *) = delete;
  void operator delete[](void *) = delete;

  /// Custom version of 'new' that uses the SILModule's BumpPtrAllocator with
  /// precise alignment knowledge.  This is templated on the allocator type so
  /// that this doesn't require including SILModule.h.
  template <typename ContextTy>
  void *operator new(size_t Bytes, const ContextTy &C,
                     size_t Alignment = alignof(DERIVED)) {
    return C.allocate(Bytes, Alignment);
  }
};

} // end swift namespace

#endif