390 lines
23 KiB
C++
390 lines
23 KiB
C++
/* ----------------------------------------------------------------------------
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Copyright (c) 2018, 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_H
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#define MIMALLOC_H
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#define MI_MALLOC_VERSION 140 // major + 2 digits minor
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// ------------------------------------------------------
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// Compiler specific attributes
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// ------------------------------------------------------
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#ifdef __cplusplus
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#if (__cplusplus >= 201103L) || (_MSC_VER > 1900) // C++11
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#define mi_attr_noexcept noexcept
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#else
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#define mi_attr_noexcept throw()
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#endif
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#else
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#define mi_attr_noexcept
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#endif
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#ifdef _MSC_VER
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#if !defined(MI_SHARED_LIB)
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#define mi_decl_export
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#elif defined(MI_SHARED_LIB_EXPORT)
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#define mi_decl_export __declspec(dllexport)
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#else
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#define mi_decl_export __declspec(dllimport)
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#endif
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#if (_MSC_VER >= 1900) && !defined(__EDG__)
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#define mi_decl_allocator __declspec(allocator) __declspec(restrict)
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#else
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#define mi_decl_allocator __declspec(restrict)
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#endif
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#define mi_cdecl __cdecl
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#define mi_decl_thread __declspec(thread)
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#define mi_attr_malloc
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#define mi_attr_alloc_size(s)
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#define mi_attr_alloc_size2(s1,s2)
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#define mi_attr_alloc_align(p)
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#elif defined(__GNUC__) || defined(__clang__)
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#define mi_cdecl // leads to warnings... __attribute__((cdecl))
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#define mi_decl_thread __thread
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#define mi_decl_export __attribute__((visibility("default")))
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#define mi_decl_allocator
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#define mi_attr_malloc __attribute__((malloc))
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#if (defined(__clang_major__) && (__clang_major__ < 4)) || (__GNUC__ < 5)
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#define mi_attr_alloc_size(s)
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#define mi_attr_alloc_size2(s1,s2)
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#define mi_attr_alloc_align(p)
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#elif defined(__INTEL_COMPILER)
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#define mi_attr_alloc_size(s) __attribute__((alloc_size(s)))
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#define mi_attr_alloc_size2(s1,s2) __attribute__((alloc_size(s1,s2)))
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#define mi_attr_alloc_align(p)
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#else
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#define mi_attr_alloc_size(s) __attribute__((alloc_size(s)))
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#define mi_attr_alloc_size2(s1,s2) __attribute__((alloc_size(s1,s2)))
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#define mi_attr_alloc_align(p) __attribute__((alloc_align(p)))
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#endif
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#else
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#define mi_cdecl
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#define mi_decl_thread __thread
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#define mi_decl_export
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#define mi_decl_allocator
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#define mi_attr_malloc
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#define mi_attr_alloc_size(s)
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#define mi_attr_alloc_size2(s1,s2)
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#define mi_attr_alloc_align(p)
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#endif
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// ------------------------------------------------------
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// Includes
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// ------------------------------------------------------
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#include <stddef.h> // size_t
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#include <stdbool.h> // bool
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#ifdef __cplusplus
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extern "C" {
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#endif
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// ------------------------------------------------------
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// Standard malloc interface
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// ------------------------------------------------------
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mi_decl_export mi_decl_allocator void* mi_malloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export mi_decl_allocator void* mi_calloc(size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(1,2);
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mi_decl_export mi_decl_allocator void* mi_realloc(void* p, size_t newsize) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_expand(void* p, size_t newsize) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export void mi_free(void* p) mi_attr_noexcept;
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mi_decl_export char* mi_strdup(const char* s) mi_attr_noexcept;
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mi_decl_export char* mi_strndup(const char* s, size_t n) mi_attr_noexcept;
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mi_decl_export char* mi_realpath(const char* fname, char* resolved_name) mi_attr_noexcept;
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// ------------------------------------------------------
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// Extended functionality
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// ------------------------------------------------------
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#define MI_SMALL_WSIZE_MAX (128)
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#define MI_SMALL_SIZE_MAX (MI_SMALL_WSIZE_MAX*sizeof(void*))
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mi_decl_export mi_decl_allocator void* mi_malloc_small(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export mi_decl_allocator void* mi_zalloc_small(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export mi_decl_allocator void* mi_zalloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export mi_decl_allocator void* mi_mallocn(size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(1,2);
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mi_decl_export mi_decl_allocator void* mi_reallocn(void* p, size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2,3);
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mi_decl_export mi_decl_allocator void* mi_reallocf(void* p, size_t newsize) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export size_t mi_usable_size(const void* p) mi_attr_noexcept;
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mi_decl_export size_t mi_good_size(size_t size) mi_attr_noexcept;
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// ------------------------------------------------------
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// Internals
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// ------------------------------------------------------
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typedef void (mi_cdecl mi_deferred_free_fun)(bool force, unsigned long long heartbeat, void* arg);
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mi_decl_export void mi_register_deferred_free(mi_deferred_free_fun* deferred_free, void* arg) mi_attr_noexcept;
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typedef void (mi_cdecl mi_output_fun)(const char* msg, void* arg);
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mi_decl_export void mi_register_output(mi_output_fun* out, void* arg) mi_attr_noexcept;
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typedef void (mi_cdecl mi_error_fun)(int err, void* arg);
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mi_decl_export void mi_register_error(mi_error_fun* fun, void* arg);
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mi_decl_export void mi_collect(bool force) mi_attr_noexcept;
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mi_decl_export int mi_version(void) mi_attr_noexcept;
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mi_decl_export void mi_stats_reset(void) mi_attr_noexcept;
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mi_decl_export void mi_stats_merge(void) mi_attr_noexcept;
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mi_decl_export void mi_stats_print(void* out) mi_attr_noexcept; // backward compatibility: `out` is ignored and should be NULL
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mi_decl_export void mi_stats_print_out(mi_output_fun* out, void* arg) mi_attr_noexcept;
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mi_decl_export void mi_process_init(void) mi_attr_noexcept;
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mi_decl_export void mi_thread_init(void) mi_attr_noexcept;
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mi_decl_export void mi_thread_done(void) mi_attr_noexcept;
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mi_decl_export void mi_thread_stats_print_out(mi_output_fun* out, void* arg) mi_attr_noexcept;
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// -------------------------------------------------------------------------------------
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// Aligned allocation
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// Note that `alignment` always follows `size` for consistency with unaligned
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// allocation, but unfortunately this differs from `posix_memalign` and `aligned_alloc`.
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// -------------------------------------------------------------------------------------
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mi_decl_export mi_decl_allocator void* mi_malloc_aligned(size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1) mi_attr_alloc_align(2);
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mi_decl_export mi_decl_allocator void* mi_malloc_aligned_at(size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export mi_decl_allocator void* mi_zalloc_aligned(size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1) mi_attr_alloc_align(2);
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mi_decl_export mi_decl_allocator void* mi_zalloc_aligned_at(size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export mi_decl_allocator void* mi_calloc_aligned(size_t count, size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(1,2) mi_attr_alloc_align(3);
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mi_decl_export mi_decl_allocator void* mi_calloc_aligned_at(size_t count, size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(1,2);
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mi_decl_export mi_decl_allocator void* mi_realloc_aligned(void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2) mi_attr_alloc_align(3);
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mi_decl_export mi_decl_allocator void* mi_realloc_aligned_at(void* p, size_t newsize, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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// -------------------------------------------------------------------------------------
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// Heaps: first-class, but can only allocate from the same thread that created it.
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// -------------------------------------------------------------------------------------
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struct mi_heap_s;
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typedef struct mi_heap_s mi_heap_t;
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mi_decl_export mi_heap_t* mi_heap_new(void);
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mi_decl_export void mi_heap_delete(mi_heap_t* heap);
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mi_decl_export void mi_heap_destroy(mi_heap_t* heap);
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mi_decl_export mi_heap_t* mi_heap_set_default(mi_heap_t* heap);
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mi_decl_export mi_heap_t* mi_heap_get_default(void);
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mi_decl_export mi_heap_t* mi_heap_get_backing(void);
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mi_decl_export void mi_heap_collect(mi_heap_t* heap, bool force) mi_attr_noexcept;
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mi_decl_export mi_decl_allocator void* mi_heap_malloc(mi_heap_t* heap, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_heap_zalloc(mi_heap_t* heap, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_heap_calloc(mi_heap_t* heap, size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2, 3);
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mi_decl_export mi_decl_allocator void* mi_heap_mallocn(mi_heap_t* heap, size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2, 3);
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mi_decl_export mi_decl_allocator void* mi_heap_malloc_small(mi_heap_t* heap, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_heap_realloc(mi_heap_t* heap, void* p, size_t newsize) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(3);
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mi_decl_export mi_decl_allocator void* mi_heap_reallocn(mi_heap_t* heap, void* p, size_t count, size_t size) mi_attr_noexcept;
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mi_decl_export mi_decl_allocator void* mi_heap_reallocf(mi_heap_t* heap, void* p, size_t newsize) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(3);
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mi_decl_export char* mi_heap_strdup(mi_heap_t* heap, const char* s) mi_attr_noexcept;
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mi_decl_export char* mi_heap_strndup(mi_heap_t* heap, const char* s, size_t n) mi_attr_noexcept;
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mi_decl_export char* mi_heap_realpath(mi_heap_t* heap, const char* fname, char* resolved_name) mi_attr_noexcept;
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mi_decl_export mi_decl_allocator void* mi_heap_malloc_aligned(mi_heap_t* heap, size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2) mi_attr_alloc_align(3);
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mi_decl_export mi_decl_allocator void* mi_heap_malloc_aligned_at(mi_heap_t* heap, size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_heap_zalloc_aligned(mi_heap_t* heap, size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2) mi_attr_alloc_align(3);
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mi_decl_export mi_decl_allocator void* mi_heap_zalloc_aligned_at(mi_heap_t* heap, size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_heap_calloc_aligned(mi_heap_t* heap, size_t count, size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2, 3) mi_attr_alloc_align(4);
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mi_decl_export mi_decl_allocator void* mi_heap_calloc_aligned_at(mi_heap_t* heap, size_t count, size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2, 3);
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mi_decl_export mi_decl_allocator void* mi_heap_realloc_aligned(mi_heap_t* heap, void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(3) mi_attr_alloc_align(4);
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mi_decl_export mi_decl_allocator void* mi_heap_realloc_aligned_at(mi_heap_t* heap, void* p, size_t newsize, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(3);
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// --------------------------------------------------------------------------------
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// Zero initialized re-allocation.
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// Only valid on memory that was originally allocated with zero initialization too.
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// e.g. `mi_calloc`, `mi_zalloc`, `mi_zalloc_aligned` etc.
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// see <https://github.com/microsoft/mimalloc/issues/63#issuecomment-508272992>
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// --------------------------------------------------------------------------------
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mi_decl_export mi_decl_allocator void* mi_rezalloc(void* p, size_t newsize) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_recalloc(void* p, size_t newcount, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2,3);
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mi_decl_export mi_decl_allocator void* mi_rezalloc_aligned(void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2) mi_attr_alloc_align(3);
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mi_decl_export mi_decl_allocator void* mi_rezalloc_aligned_at(void* p, size_t newsize, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2);
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mi_decl_export mi_decl_allocator void* mi_recalloc_aligned(void* p, size_t newcount, size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2,3) mi_attr_alloc_align(4);
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mi_decl_export mi_decl_allocator void* mi_recalloc_aligned_at(void* p, size_t newcount, size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2,3);
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mi_decl_export mi_decl_allocator void* mi_heap_rezalloc(mi_heap_t* heap, void* p, size_t newsize) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(3);
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mi_decl_export mi_decl_allocator void* mi_heap_recalloc(mi_heap_t* heap, void* p, size_t newcount, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(3,4);
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mi_decl_export mi_decl_allocator void* mi_heap_rezalloc_aligned(mi_heap_t* heap, void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(3) mi_attr_alloc_align(4);
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mi_decl_export mi_decl_allocator void* mi_heap_rezalloc_aligned_at(mi_heap_t* heap, void* p, size_t newsize, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(3);
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mi_decl_export mi_decl_allocator void* mi_heap_recalloc_aligned(mi_heap_t* heap, void* p, size_t newcount, size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(3,4) mi_attr_alloc_align(5);
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mi_decl_export mi_decl_allocator void* mi_heap_recalloc_aligned_at(mi_heap_t* heap, void* p, size_t newcount, size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(3,4);
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// ------------------------------------------------------
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// Analysis
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// ------------------------------------------------------
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mi_decl_export bool mi_heap_contains_block(mi_heap_t* heap, const void* p);
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mi_decl_export bool mi_heap_check_owned(mi_heap_t* heap, const void* p);
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mi_decl_export bool mi_check_owned(const void* p);
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// An area of heap space contains blocks of a single size.
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typedef struct mi_heap_area_s {
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void* blocks; // start of the area containing heap blocks
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size_t reserved; // bytes reserved for this area (virtual)
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size_t committed; // current available bytes for this area
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size_t used; // bytes in use by allocated blocks
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size_t block_size; // size in bytes of each block
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} mi_heap_area_t;
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typedef bool (mi_cdecl mi_block_visit_fun)(const mi_heap_t* heap, const mi_heap_area_t* area, void* block, size_t block_size, void* arg);
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mi_decl_export bool mi_heap_visit_blocks(const mi_heap_t* heap, bool visit_all_blocks, mi_block_visit_fun* visitor, void* arg);
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// Experimental
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mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept;
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mi_decl_export bool mi_is_redirected() mi_attr_noexcept;
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mi_decl_export int mi_reserve_huge_os_pages_interleave(size_t pages, size_t numa_nodes, size_t timeout_msecs) mi_attr_noexcept;
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mi_decl_export int mi_reserve_huge_os_pages_at(size_t pages, int numa_node, size_t timeout_msecs) mi_attr_noexcept;
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// deprecated
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mi_decl_export int mi_reserve_huge_os_pages(size_t pages, double max_secs, size_t* pages_reserved) mi_attr_noexcept;
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// ------------------------------------------------------
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// Convenience
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// ------------------------------------------------------
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#define mi_malloc_tp(tp) ((tp*)mi_malloc(sizeof(tp)))
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#define mi_zalloc_tp(tp) ((tp*)mi_zalloc(sizeof(tp)))
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#define mi_calloc_tp(tp,n) ((tp*)mi_calloc(n,sizeof(tp)))
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#define mi_mallocn_tp(tp,n) ((tp*)mi_mallocn(n,sizeof(tp)))
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#define mi_reallocn_tp(p,tp,n) ((tp*)mi_reallocn(p,n,sizeof(tp)))
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#define mi_recalloc_tp(p,tp,n) ((tp*)mi_recalloc(p,n,sizeof(tp)))
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#define mi_heap_malloc_tp(hp,tp) ((tp*)mi_heap_malloc(hp,sizeof(tp)))
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#define mi_heap_zalloc_tp(hp,tp) ((tp*)mi_heap_zalloc(hp,sizeof(tp)))
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#define mi_heap_calloc_tp(hp,tp,n) ((tp*)mi_heap_calloc(hp,n,sizeof(tp)))
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#define mi_heap_mallocn_tp(hp,tp,n) ((tp*)mi_heap_mallocn(hp,n,sizeof(tp)))
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#define mi_heap_reallocn_tp(hp,p,tp,n) ((tp*)mi_heap_reallocn(hp,p,n,sizeof(tp)))
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#define mi_heap_recalloc_tp(hp,p,tp,n) ((tp*)mi_heap_recalloc(hp,p,n,sizeof(tp)))
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// ------------------------------------------------------
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// Options, all `false` by default
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// ------------------------------------------------------
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typedef enum mi_option_e {
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// stable options
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mi_option_show_errors,
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mi_option_show_stats,
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mi_option_verbose,
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// the following options are experimental
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mi_option_eager_commit,
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mi_option_eager_region_commit,
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mi_option_reset_decommits,
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mi_option_large_os_pages, // implies eager commit
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mi_option_reserve_huge_os_pages,
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mi_option_segment_cache,
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mi_option_page_reset,
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mi_option_abandoned_page_reset,
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mi_option_segment_reset,
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mi_option_eager_commit_delay,
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mi_option_reset_delay,
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mi_option_use_numa_nodes,
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mi_option_os_tag,
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mi_option_max_errors,
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_mi_option_last,
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mi_option_eager_page_commit = mi_option_eager_commit
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} mi_option_t;
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mi_decl_export bool mi_option_is_enabled(mi_option_t option);
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mi_decl_export void mi_option_enable(mi_option_t option);
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mi_decl_export void mi_option_disable(mi_option_t option);
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mi_decl_export void mi_option_set_enabled(mi_option_t option, bool enable);
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mi_decl_export void mi_option_set_enabled_default(mi_option_t option, bool enable);
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mi_decl_export long mi_option_get(mi_option_t option);
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mi_decl_export void mi_option_set(mi_option_t option, long value);
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mi_decl_export void mi_option_set_default(mi_option_t option, long value);
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// -------------------------------------------------------------------------------------------------------
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// "mi" prefixed implementations of various posix, Unix, Windows, and C++ allocation functions.
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// (This can be convenient when providing overrides of these functions as done in `mimalloc-override.h`.)
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// -------------------------------------------------------------------------------------------------------
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mi_decl_export size_t mi_malloc_size(const void* p) mi_attr_noexcept;
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mi_decl_export size_t mi_malloc_usable_size(const void *p) mi_attr_noexcept;
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mi_decl_export void mi_cfree(void* p) mi_attr_noexcept;
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mi_decl_export void* mi__expand(void* p, size_t newsize) mi_attr_noexcept;
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mi_decl_export int mi_posix_memalign(void** p, size_t alignment, size_t size) mi_attr_noexcept;
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mi_decl_export void* mi_memalign(size_t alignment, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2) mi_attr_alloc_align(1);
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mi_decl_export void* mi_valloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export void* mi_pvalloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export void* mi_aligned_alloc(size_t alignment, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2) mi_attr_alloc_align(1);
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mi_decl_export void* mi_reallocarray(void* p, size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(2,3);
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mi_decl_export void* mi_aligned_recalloc(void* p, size_t newcount, size_t size, size_t alignment) mi_attr_noexcept;
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mi_decl_export void* mi_aligned_offset_recalloc(void* p, size_t newcount, size_t size, size_t alignment, size_t offset) mi_attr_noexcept;
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mi_decl_export unsigned short* mi_wcsdup(const unsigned short* s) mi_attr_noexcept;
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mi_decl_export unsigned char* mi_mbsdup(const unsigned char* s) mi_attr_noexcept;
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mi_decl_export int mi_dupenv_s(char** buf, size_t* size, const char* name) mi_attr_noexcept;
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mi_decl_export int mi_wdupenv_s(unsigned short** buf, size_t* size, const unsigned short* name) mi_attr_noexcept;
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mi_decl_export void mi_free_size(void* p, size_t size) mi_attr_noexcept;
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mi_decl_export void mi_free_size_aligned(void* p, size_t size, size_t alignment) mi_attr_noexcept;
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mi_decl_export void mi_free_aligned(void* p, size_t alignment) mi_attr_noexcept;
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mi_decl_export void* mi_new(size_t size) mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export void* mi_new_n(size_t count, size_t size) mi_attr_malloc mi_attr_alloc_size2(1,2);
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mi_decl_export void* mi_new_aligned(size_t size, size_t alignment) mi_attr_malloc mi_attr_alloc_size(1) mi_attr_alloc_align(2);
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mi_decl_export void* mi_new_nothrow(size_t size) mi_attr_malloc mi_attr_alloc_size(1);
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mi_decl_export void* mi_new_aligned_nothrow(size_t size, size_t alignment) mi_attr_malloc mi_attr_alloc_size(1) mi_attr_alloc_align(2);
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#ifdef __cplusplus
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}
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#endif
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// ---------------------------------------------------------------------------------------------
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// Implement the C++ std::allocator interface for use in STL containers.
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// (note: see `mimalloc-new-delete.h` for overriding the new/delete operators globally)
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// ---------------------------------------------------------------------------------------------
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#ifdef __cplusplus
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#if (__cplusplus >= 201103L) || (_MSC_VER > 1900) // C++11
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#include <type_traits> // true_type
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#include <cstdint> // PTRDIFF_MAX
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#endif
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template<class T> struct mi_stl_allocator {
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typedef T value_type;
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#if (__cplusplus >= 201103L) || (_MSC_VER > 1900) // C++11
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using propagate_on_container_copy_assignment = std::true_type;
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using propagate_on_container_move_assignment = std::true_type;
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using propagate_on_container_swap = std::true_type;
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using is_always_equal = std::true_type;
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size_t max_size() const noexcept { return (PTRDIFF_MAX / sizeof(value_type)); }
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#endif
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mi_stl_allocator() mi_attr_noexcept { }
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mi_stl_allocator(const mi_stl_allocator& ) mi_attr_noexcept { }
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template<class U> mi_stl_allocator(const mi_stl_allocator<U>& ) mi_attr_noexcept { }
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void deallocate(T* p, size_t /* count */) { mi_free(p); }
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#if (__cplusplus >= 201703L) // C++17
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T* allocate(size_t count) { return (T*)mi_new_n(count, sizeof(T)); }
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#else
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T* allocate(size_t count, const void* hint = 0) { (void)hint; return (T*)mi_new_n(count, sizeof(T)); }
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#endif
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};
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template<class T1,class T2> bool operator==(const mi_stl_allocator<T1>& , const mi_stl_allocator<T2>& ) mi_attr_noexcept { return true; }
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template<class T1,class T2> bool operator!=(const mi_stl_allocator<T1>& , const mi_stl_allocator<T2>& ) mi_attr_noexcept { return false; }
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#endif // __cplusplus
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#endif
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