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  1. //===--- Capacity.h - Generic computation of ADT memory use -----*- 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-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. //
  9. // This file defines the capacity function that computes the amount of
  10. // memory used by an ADT.
  11. //
  12. //===----------------------------------------------------------------------===//
  13.  
  14. #ifndef LLVM_SUPPORT_CAPACITY_H
  15. #define LLVM_SUPPORT_CAPACITY_H
  16.  
  17. #include <cstddef>
  18.  
  19. namespace llvm {
  20.  
  21. template <typename T>
  22. static inline size_t capacity_in_bytes(const T &x) {
  23.   // This default definition of capacity should work for things like std::vector
  24.   // and friends.  More specialized versions will work for others.
  25.   return x.capacity() * sizeof(typename T::value_type);
  26. }
  27.  
  28. } // end namespace llvm
  29.  
  30. #endif
  31.  
  32.