67 lines
3.9 KiB
C++
67 lines
3.9 KiB
C++
/* ----------------------------------------------------------------------------
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Copyright (c) 2018-2020 Microsoft Research, Daan Leijen
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This is free software; you can redistribute it and/or modify it under the
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terms of the MIT license. A copy of the license can be found in the file
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"LICENSE" at the root of this distribution.
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-----------------------------------------------------------------------------*/
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#pragma once
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#ifndef MIMALLOC_NEW_DELETE_H
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#define MIMALLOC_NEW_DELETE_H
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// ----------------------------------------------------------------------------
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// This header provides convenient overrides for the new and
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// delete operations in C++.
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//
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// This header should be included in only one source file!
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//
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// On Windows, or when linking dynamically with mimalloc, these
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// can be more performant than the standard new-delete operations.
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// See <https://en.cppreference.com/w/cpp/memory/new/operator_new>
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// ---------------------------------------------------------------------------
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#if defined(__cplusplus)
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#include <new>
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#include <mimalloc.h>
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#if defined(_MSC_VER) && defined(_Ret_notnull_) && defined(_Post_writable_byte_size_)
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// stay consistent with VCRT definitions
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#define mi_decl_new(n) mi_decl_nodiscard mi_decl_restrict _Ret_notnull_ _Post_writable_byte_size_(n)
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#define mi_decl_new_nothrow(n) mi_decl_nodiscard mi_decl_restrict _Ret_maybenull_ _Success_(return != NULL) _Post_writable_byte_size_(n)
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#else
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#define mi_decl_new(n) mi_decl_nodiscard mi_decl_restrict
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#define mi_decl_new_nothrow(n) mi_decl_nodiscard mi_decl_restrict
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#endif
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void operator delete(void* p) noexcept { mi_free(p); };
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void operator delete[](void* p) noexcept { mi_free(p); };
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void operator delete (void* p, const std::nothrow_t&) noexcept { mi_free(p); }
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void operator delete[](void* p, const std::nothrow_t&) noexcept { mi_free(p); }
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mi_decl_new(n) void* operator new(std::size_t n) noexcept(false) { return mi_new(n); }
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mi_decl_new(n) void* operator new[](std::size_t n) noexcept(false) { return mi_new(n); }
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mi_decl_new_nothrow(n) void* operator new (std::size_t n, const std::nothrow_t& tag) noexcept { (void)(tag); return mi_new_nothrow(n); }
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mi_decl_new_nothrow(n) void* operator new[](std::size_t n, const std::nothrow_t& tag) noexcept { (void)(tag); return mi_new_nothrow(n); }
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#if (__cplusplus >= 201402L || _MSC_VER >= 1916)
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void operator delete (void* p, std::size_t n) noexcept { mi_free_size(p,n); };
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void operator delete[](void* p, std::size_t n) noexcept { mi_free_size(p,n); };
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#endif
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#if (__cplusplus > 201402L || defined(__cpp_aligned_new))
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void operator delete (void* p, std::align_val_t al) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); }
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void operator delete[](void* p, std::align_val_t al) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); }
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void operator delete (void* p, std::size_t n, std::align_val_t al) noexcept { mi_free_size_aligned(p, n, static_cast<size_t>(al)); };
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void operator delete[](void* p, std::size_t n, std::align_val_t al) noexcept { mi_free_size_aligned(p, n, static_cast<size_t>(al)); };
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void operator delete (void* p, std::align_val_t al, const std::nothrow_t&) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); }
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void operator delete[](void* p, std::align_val_t al, const std::nothrow_t&) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); }
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void* operator new (std::size_t n, std::align_val_t al) noexcept(false) { return mi_new_aligned(n, static_cast<size_t>(al)); }
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void* operator new[](std::size_t n, std::align_val_t al) noexcept(false) { return mi_new_aligned(n, static_cast<size_t>(al)); }
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void* operator new (std::size_t n, std::align_val_t al, const std::nothrow_t&) noexcept { return mi_new_aligned_nothrow(n, static_cast<size_t>(al)); }
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void* operator new[](std::size_t n, std::align_val_t al, const std::nothrow_t&) noexcept { return mi_new_aligned_nothrow(n, static_cast<size_t>(al)); }
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#endif
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#endif
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#endif // MIMALLOC_NEW_DELETE_H
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