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author | Dimitry Andric <dim@FreeBSD.org> | 2021-08-22 19:00:43 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2021-11-13 20:39:49 +0000 |
commit | fe6060f10f634930ff71b7c50291ddc610da2475 (patch) | |
tree | 1483580c790bd4d27b6500a7542b5ee00534d3cc /contrib/llvm-project/libcxx/include/__algorithm/make_heap.h | |
parent | b61bce17f346d79cecfd8f195a64b10f77be43b1 (diff) | |
parent | 344a3780b2e33f6ca763666c380202b18aab72a3 (diff) | |
download | src-fe6060f10f634930ff71b7c50291ddc610da2475.tar.gz src-fe6060f10f634930ff71b7c50291ddc610da2475.zip |
Merge llvm-project main llvmorg-13-init-16847-g88e66fa60ae5
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-13-init-16847-g88e66fa60ae5, the last commit before
the upstream release/13.x branch was created.
PR: 258209
MFC after: 2 weeks
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__algorithm/make_heap.h')
-rw-r--r-- | contrib/llvm-project/libcxx/include/__algorithm/make_heap.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/make_heap.h b/contrib/llvm-project/libcxx/include/__algorithm/make_heap.h new file mode 100644 index 000000000000..eca4013cbd10 --- /dev/null +++ b/contrib/llvm-project/libcxx/include/__algorithm/make_heap.h @@ -0,0 +1,64 @@ +//===----------------------------------------------------------------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MAKE_HEAP_H +#define _LIBCPP___ALGORITHM_MAKE_HEAP_H + +#include <__config> +#include <__algorithm/comp.h> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/sift_down.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template <class _Compare, class _RandomAccessIterator> +_LIBCPP_CONSTEXPR_AFTER_CXX11 void +__make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + difference_type __n = __last - __first; + if (__n > 1) + { + // start from the first parent, there is no need to consider children + for (difference_type __start = (__n - 2) / 2; __start >= 0; --__start) + { + _VSTD::__sift_down<_Compare>(__first, __last, __comp, __n, __first + __start); + } + } +} + +template <class _RandomAccessIterator, class _Compare> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__make_heap<_Comp_ref>(__first, __last, __comp); +} + +template <class _RandomAccessIterator> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + _VSTD::make_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MAKE_HEAP_H |