include/llvm/Support/Capacity.h

   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