llvm/Support/Capacity.h

0001 //===--- Capacity.h - Generic computation of ADT memory use -----*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008 //
0009 // This file defines the capacity function that computes the amount of
0010 // memory used by an ADT.
0011 //
0012 //===----------------------------------------------------------------------===//
0013
0014 #ifndef LLVM_SUPPORT_CAPACITY_H
0015 #define LLVM_SUPPORT_CAPACITY_H
0016
0017 #include <cstddef>
0018
0019 namespace llvm {
0020
0021 template <typename T>
0022 static inline size_t capacity_in_bytes(const T &x) {
0023   // This default definition of capacity should work for things like std::vector
0024   // and friends.  More specialized versions will work for others.
0025   return x.capacity() * sizeof(typename T::value_type);
0026 }
0027
0028 } // end namespace llvm
0029
0030 #endif
0031