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put new-delete overrides in separate header file

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daan 2019-09-15 19:19:00 -07:00
parent adf8e30eda
commit 33f4ec4ac6
9 changed files with 64 additions and 45 deletions
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46
include/mimalloc-override.h
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@ -13,14 +13,9 @@ This header can be used to statically redirect malloc/free and new/delete
to the mimalloc variants. This can be useful if one can include this file on
each source file in a project (but be careful when using external code to
not accidentally mix pointers from different allocators).
On windows it can still be good to always try to include this header even
when dynamically overriding since this will give better performance especially
for new/delete. On Unix dynamic overriding already includes all variants so
including this header is not necessary.
-----------------------------------------------------------------------------*/
#include "mimalloc.h"
#include <mimalloc.h>
// Standard C allocation
#define malloc(n) mi_malloc(n)
@ -68,43 +63,4 @@ including this header is not necessary.
#define _aligned_offset_realloc(p,n,a,o) mi_realloc_aligned_at(p,n,a,o)
#define _aligned_offset_recalloc(p,s,n,a,o) mi_recalloc_aligned_at(p,s,n,a,o)
// -----------------------------------------------------------------
// With a C++ compiler we can override all the new/delete operators
// by defining 'MIMALLOC_DEFINE_NEW_DELETE' in some source file and
// then including this header file. This is not needed when linking
// statically with the mimalloc library, but it can be more performant
// on Windows when using dynamic overiding as well.
// see <https://en.cppreference.com/w/cpp/memory/new/operator_new>
// -----------------------------------------------------------------
#if defined(__cplusplus) && defined(MIMALLOC_DEFINE_NEW_DELETE)
#include <new>
void operator delete(void* p) noexcept { mi_free(p); };
void operator delete[](void* p) noexcept { mi_free(p); };
void* operator new(std::size_t n) noexcept(false) { return mi_new(n); }
void* operator new[](std::size_t n) noexcept(false) { return mi_new(n); }
void* operator new (std::size_t n, const std::nothrow_t& tag) noexcept { (void)(tag); return mi_new_nothrow(n); }
void* operator new[](std::size_t n, const std::nothrow_t& tag) noexcept { (void)(tag); return mi_new_nothrow(n); }
#if (__cplusplus >= 201402L || _MSC_VER >= 1916)
void operator delete (void* p, std::size_t n) { mi_free_size(p,n); };
void operator delete[](void* p, std::size_t n) { mi_free_size(p,n); };
#endif
#if (__cplusplus > 201402L || defined(__cpp_aligned_new))
void operator delete (void* p, std::align_val_t al) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); }
void operator delete[](void* p, std::align_val_t al) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); }
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)); };
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)); };
void* operator new( std::size_t n, std::align_val_t al) noexcept(false) { return mi_new_aligned(n, static_cast<size_t>(al)); }
void* operator new[]( std::size_t n, std::align_val_t al) noexcept(false) { return mi_new_aligned(n, static_cast<size_t>(al)); }
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)); }
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)); }
#endif
#endif
#endif // MIMALLOC_OVERRIDE_H