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mimalloc
mimalloc.h
/* ---------------------------------------------------------------------------- Copyright (c) 2018-2023, Microsoft Research, Daan Leijen This is free software; you can redistribute it and/or modify it under the terms of the MIT license. A copy of the license can be found in the file "LICENSE" at the root of this distribution. -----------------------------------------------------------------------------*/ #pragma once #ifndef MIMALLOC_H #define MIMALLOC_H #define MI_MALLOC_VERSION 212 // major + 2 digits minor // ------------------------------------------------------ // Compiler specific attributes // ------------------------------------------------------ #ifdef __cplusplus #if (__cplusplus >= 201103L) || (_MSC_VER > 1900) // C++11 #define mi_attr_noexcept noexcept #else #define mi_attr_noexcept throw() #endif #else #define mi_attr_noexcept #endif #if defined(__cplusplus) && (__cplusplus >= 201703) #define mi_decl_nodiscard [[nodiscard]] #elif (defined(__GNUC__) && (__GNUC__ >= 4)) || defined(__clang__) // includes clang, icc, and clang-cl #define mi_decl_nodiscard __attribute__((warn_unused_result)) #elif defined(_HAS_NODISCARD) #define mi_decl_nodiscard _NODISCARD #elif (_MSC_VER >= 1700) #define mi_decl_nodiscard _Check_return_ #else #define mi_decl_nodiscard #endif #if defined(_MSC_VER) || defined(__MINGW32__) #if !defined(MI_SHARED_LIB) #define mi_decl_export #elif defined(MI_SHARED_LIB_EXPORT) #define mi_decl_export __declspec(dllexport) #else #define mi_decl_export __declspec(dllimport) #endif #if defined(__MINGW32__) #define mi_decl_restrict #define mi_attr_malloc __attribute__((malloc)) #else #if (_MSC_VER >= 1900) && !defined(__EDG__) #define mi_decl_restrict __declspec(allocator) __declspec(restrict) #else #define mi_decl_restrict __declspec(restrict) #endif #define mi_attr_malloc #endif #define mi_cdecl __cdecl #define mi_attr_alloc_size(s) #define mi_attr_alloc_size2(s1,s2) #define mi_attr_alloc_align(p) #elif defined(__GNUC__) // includes clang and icc #if defined(MI_SHARED_LIB) && defined(MI_SHARED_LIB_EXPORT) #define mi_decl_export __attribute__((visibility("default"))) #else #define mi_decl_export #endif #define mi_cdecl // leads to warnings... __attribute__((cdecl)) #define mi_decl_restrict #define mi_attr_malloc __attribute__((malloc)) #if (defined(__clang_major__) && (__clang_major__ < 4)) || (__GNUC__ < 5) #define mi_attr_alloc_size(s) #define mi_attr_alloc_size2(s1,s2) #define mi_attr_alloc_align(p) #elif defined(__INTEL_COMPILER) #define mi_attr_alloc_size(s) __attribute__((alloc_size(s))) #define mi_attr_alloc_size2(s1,s2) __attribute__((alloc_size(s1,s2))) #define mi_attr_alloc_align(p) #else #define mi_attr_alloc_size(s) __attribute__((alloc_size(s))) #define mi_attr_alloc_size2(s1,s2) __attribute__((alloc_size(s1,s2))) #define mi_attr_alloc_align(p) __attribute__((alloc_align(p))) #endif #else #define mi_cdecl #define mi_decl_export #define mi_decl_restrict #define mi_attr_malloc #define mi_attr_alloc_size(s) #define mi_attr_alloc_size2(s1,s2) #define mi_attr_alloc_align(p) #endif // ------------------------------------------------------ // Includes // ------------------------------------------------------ #include <stddef.h> // size_t #include <stdbool.h> // bool #include <stdint.h> // INTPTR_MAX #ifdef __cplusplus extern "C" { #endif // ------------------------------------------------------ // Standard malloc interface // ------------------------------------------------------ mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_malloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_calloc(size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(1,2); mi_decl_nodiscard mi_decl_export void* mi_realloc(void* p, size_t newsize) mi_attr_noexcept mi_attr_alloc_size(2); mi_decl_export void* mi_expand(void* p, size_t newsize) mi_attr_noexcept mi_attr_alloc_size(2); mi_decl_export void mi_free(void* p) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export mi_decl_restrict char* mi_strdup(const char* s) mi_attr_noexcept mi_attr_malloc; mi_decl_nodiscard mi_decl_export mi_decl_restrict char* mi_strndup(const char* s, size_t n) mi_attr_noexcept mi_attr_malloc; mi_decl_nodiscard mi_decl_export mi_decl_restrict char* mi_realpath(const char* fname, char* resolved_name) mi_attr_noexcept mi_attr_malloc; // ------------------------------------------------------ // Extended functionality // ------------------------------------------------------ #define MI_SMALL_WSIZE_MAX (128) #define MI_SMALL_SIZE_MAX (MI_SMALL_WSIZE_MAX*sizeof(void*)) mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_malloc_small(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_zalloc_small(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_zalloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_mallocn(size_t count, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size2(1,2); mi_decl_nodiscard mi_decl_export void* mi_reallocn(void* p, size_t count, size_t size) mi_attr_noexcept mi_attr_alloc_size2(2,3); mi_decl_nodiscard mi_decl_export void* mi_reallocf(void* p, size_t newsize) mi_attr_noexcept mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export size_t mi_usable_size(const void* p) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export size_t mi_good_size(size_t size) mi_attr_noexcept; // ------------------------------------------------------ // Internals // ------------------------------------------------------ typedef void (mi_cdecl mi_deferred_free_fun)(bool force, unsigned long long heartbeat, void* arg); mi_decl_export void mi_register_deferred_free(mi_deferred_free_fun* deferred_free, void* arg) mi_attr_noexcept; typedef void (mi_cdecl mi_output_fun)(const char* msg, void* arg); mi_decl_export void mi_register_output(mi_output_fun* out, void* arg) mi_attr_noexcept; typedef void (mi_cdecl mi_error_fun)(int err, void* arg); mi_decl_export void mi_register_error(mi_error_fun* fun, void* arg); mi_decl_export void mi_collect(bool force) mi_attr_noexcept; mi_decl_export int mi_version(void) mi_attr_noexcept; mi_decl_export void mi_stats_reset(void) mi_attr_noexcept; mi_decl_export void mi_stats_merge(void) mi_attr_noexcept; mi_decl_export void mi_stats_print(void* out) mi_attr_noexcept; // backward compatibility: `out` is ignored and should be NULL mi_decl_export void mi_stats_print_out(mi_output_fun* out, void* arg) mi_attr_noexcept; mi_decl_export void mi_process_init(void) mi_attr_noexcept; mi_decl_export void mi_thread_init(void) mi_attr_noexcept; mi_decl_export void mi_thread_done(void) mi_attr_noexcept; mi_decl_export void mi_thread_stats_print_out(mi_output_fun* out, void* arg) mi_attr_noexcept; mi_decl_export void mi_process_info(size_t* elapsed_msecs, size_t* user_msecs, size_t* system_msecs, size_t* current_rss, size_t* peak_rss, size_t* current_commit, size_t* peak_commit, size_t* page_faults) mi_attr_noexcept; // ------------------------------------------------------------------------------------- // Aligned allocation // Note that `alignment` always follows `size` for consistency with unaligned // allocation, but unfortunately this differs from `posix_memalign` and `aligned_alloc`. // ------------------------------------------------------------------------------------- mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export void* mi_realloc_aligned(void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_alloc_size(2) mi_attr_alloc_align(3); mi_decl_nodiscard mi_decl_export void* mi_realloc_aligned_at(void* p, size_t newsize, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_alloc_size(2); // ------------------------------------------------------------------------------------- // Heaps: first-class, but can only allocate from the same thread that created it. // ------------------------------------------------------------------------------------- struct mi_heap_s; typedef struct mi_heap_s mi_heap_t; mi_decl_nodiscard mi_decl_export mi_heap_t* mi_heap_new(void); mi_decl_export void mi_heap_delete(mi_heap_t* heap); mi_decl_export void mi_heap_destroy(mi_heap_t* heap); mi_decl_export mi_heap_t* mi_heap_set_default(mi_heap_t* heap); mi_decl_export mi_heap_t* mi_heap_get_default(void); mi_decl_export mi_heap_t* mi_heap_get_backing(void); mi_decl_export void mi_heap_collect(mi_heap_t* heap, bool force) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_heap_malloc(mi_heap_t* heap, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_heap_zalloc(mi_heap_t* heap, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_heap_malloc_small(mi_heap_t* heap, size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export void* mi_heap_realloc(mi_heap_t* heap, void* p, size_t newsize) mi_attr_noexcept mi_attr_alloc_size(3); mi_decl_nodiscard mi_decl_export void* mi_heap_reallocn(mi_heap_t* heap, void* p, size_t count, size_t size) mi_attr_noexcept mi_attr_alloc_size2(3,4); mi_decl_nodiscard mi_decl_export void* mi_heap_reallocf(mi_heap_t* heap, void* p, size_t newsize) mi_attr_noexcept mi_attr_alloc_size(3); mi_decl_nodiscard mi_decl_export mi_decl_restrict char* mi_heap_strdup(mi_heap_t* heap, const char* s) mi_attr_noexcept mi_attr_malloc; mi_decl_nodiscard mi_decl_export mi_decl_restrict char* mi_heap_strndup(mi_heap_t* heap, const char* s, size_t n) mi_attr_noexcept mi_attr_malloc; mi_decl_nodiscard mi_decl_export mi_decl_restrict char* mi_heap_realpath(mi_heap_t* heap, const char* fname, char* resolved_name) mi_attr_noexcept mi_attr_malloc; mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export void* mi_heap_realloc_aligned(mi_heap_t* heap, void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_alloc_size(3) mi_attr_alloc_align(4); mi_decl_nodiscard mi_decl_export 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_alloc_size(3); // -------------------------------------------------------------------------------- // Zero initialized re-allocation. // Only valid on memory that was originally allocated with zero initialization too. // e.g. `mi_calloc`, `mi_zalloc`, `mi_zalloc_aligned` etc. // see <https://github.com/microsoft/mimalloc/issues/63#issuecomment-508272992> // -------------------------------------------------------------------------------- mi_decl_nodiscard mi_decl_export void* mi_rezalloc(void* p, size_t newsize) mi_attr_noexcept mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export void* mi_recalloc(void* p, size_t newcount, size_t size) mi_attr_noexcept mi_attr_alloc_size2(2,3); mi_decl_nodiscard mi_decl_export void* mi_rezalloc_aligned(void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_alloc_size(2) mi_attr_alloc_align(3); mi_decl_nodiscard mi_decl_export void* mi_rezalloc_aligned_at(void* p, size_t newsize, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export void* mi_recalloc_aligned(void* p, size_t newcount, size_t size, size_t alignment) mi_attr_noexcept mi_attr_alloc_size2(2,3) mi_attr_alloc_align(4); mi_decl_nodiscard mi_decl_export void* mi_recalloc_aligned_at(void* p, size_t newcount, size_t size, size_t alignment, size_t offset) mi_attr_noexcept mi_attr_alloc_size2(2,3); mi_decl_nodiscard mi_decl_export void* mi_heap_rezalloc(mi_heap_t* heap, void* p, size_t newsize) mi_attr_noexcept mi_attr_alloc_size(3); mi_decl_nodiscard mi_decl_export void* mi_heap_recalloc(mi_heap_t* heap, void* p, size_t newcount, size_t size) mi_attr_noexcept mi_attr_alloc_size2(3,4); mi_decl_nodiscard mi_decl_export void* mi_heap_rezalloc_aligned(mi_heap_t* heap, void* p, size_t newsize, size_t alignment) mi_attr_noexcept mi_attr_alloc_size(3) mi_attr_alloc_align(4); mi_decl_nodiscard mi_decl_export 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_alloc_size(3); mi_decl_nodiscard mi_decl_export 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_alloc_size2(3,4) mi_attr_alloc_align(5); mi_decl_nodiscard mi_decl_export 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_alloc_size2(3,4); // ------------------------------------------------------ // Analysis // ------------------------------------------------------ mi_decl_export bool mi_heap_contains_block(mi_heap_t* heap, const void* p); mi_decl_export bool mi_heap_check_owned(mi_heap_t* heap, const void* p); mi_decl_export bool mi_check_owned(const void* p); // An area of heap space contains blocks of a single size. typedef struct mi_heap_area_s { void* blocks; // start of the area containing heap blocks size_t reserved; // bytes reserved for this area (virtual) size_t committed; // current available bytes for this area size_t used; // number of allocated blocks size_t block_size; // size in bytes of each block size_t full_block_size; // size in bytes of a full block including padding and metadata. } mi_heap_area_t; 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); mi_decl_export bool mi_heap_visit_blocks(const mi_heap_t* heap, bool visit_all_blocks, mi_block_visit_fun* visitor, void* arg); // Experimental mi_decl_nodiscard mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export bool mi_is_redirected(void) mi_attr_noexcept; mi_decl_export int mi_reserve_huge_os_pages_interleave(size_t pages, size_t numa_nodes, size_t timeout_msecs) mi_attr_noexcept; mi_decl_export int mi_reserve_huge_os_pages_at(size_t pages, int numa_node, size_t timeout_msecs) mi_attr_noexcept; mi_decl_export int mi_reserve_os_memory(size_t size, bool commit, bool allow_large) mi_attr_noexcept; mi_decl_export bool mi_manage_os_memory(void* start, size_t size, bool is_committed, bool is_large, bool is_zero, int numa_node) mi_attr_noexcept; mi_decl_export void mi_debug_show_arenas(void) mi_attr_noexcept; // Experimental: heaps associated with specific memory arena's typedef int mi_arena_id_t; mi_decl_export void* mi_arena_area(mi_arena_id_t arena_id, size_t* size); mi_decl_export int mi_reserve_huge_os_pages_at_ex(size_t pages, int numa_node, size_t timeout_msecs, bool exclusive, mi_arena_id_t* arena_id) mi_attr_noexcept; mi_decl_export int mi_reserve_os_memory_ex(size_t size, bool commit, bool allow_large, bool exclusive, mi_arena_id_t* arena_id) mi_attr_noexcept; mi_decl_export bool mi_manage_os_memory_ex(void* start, size_t size, bool is_committed, bool is_large, bool is_zero, int numa_node, bool exclusive, mi_arena_id_t* arena_id) mi_attr_noexcept; #if MI_MALLOC_VERSION >= 182 // Create a heap that only allocates in the specified arena mi_decl_nodiscard mi_decl_export mi_heap_t* mi_heap_new_in_arena(mi_arena_id_t arena_id); #endif // deprecated mi_decl_export int mi_reserve_huge_os_pages(size_t pages, double max_secs, size_t* pages_reserved) mi_attr_noexcept; // ------------------------------------------------------ // Convenience // ------------------------------------------------------ #define mi_malloc_tp(tp) ((tp*)mi_malloc(sizeof(tp))) #define mi_zalloc_tp(tp) ((tp*)mi_zalloc(sizeof(tp))) #define mi_calloc_tp(tp,n) ((tp*)mi_calloc(n,sizeof(tp))) #define mi_mallocn_tp(tp,n) ((tp*)mi_mallocn(n,sizeof(tp))) #define mi_reallocn_tp(p,tp,n) ((tp*)mi_reallocn(p,n,sizeof(tp))) #define mi_recalloc_tp(p,tp,n) ((tp*)mi_recalloc(p,n,sizeof(tp))) #define mi_heap_malloc_tp(hp,tp) ((tp*)mi_heap_malloc(hp,sizeof(tp))) #define mi_heap_zalloc_tp(hp,tp) ((tp*)mi_heap_zalloc(hp,sizeof(tp))) #define mi_heap_calloc_tp(hp,tp,n) ((tp*)mi_heap_calloc(hp,n,sizeof(tp))) #define mi_heap_mallocn_tp(hp,tp,n) ((tp*)mi_heap_mallocn(hp,n,sizeof(tp))) #define mi_heap_reallocn_tp(hp,p,tp,n) ((tp*)mi_heap_reallocn(hp,p,n,sizeof(tp))) #define mi_heap_recalloc_tp(hp,p,tp,n) ((tp*)mi_heap_recalloc(hp,p,n,sizeof(tp))) // ------------------------------------------------------ // Options // ------------------------------------------------------ typedef enum mi_option_e { // stable options mi_option_show_errors, // print error messages mi_option_show_stats, // print statistics on termination mi_option_verbose, // print verbose messages // the following options are experimental (see src/options.h) mi_option_eager_commit, // eager commit segments? (after `eager_commit_delay` segments) (=1) mi_option_arena_eager_commit, // eager commit arenas? Use 2 to enable just on overcommit systems (=2) mi_option_purge_decommits, // should a memory purge decommit (or only reset) (=1) mi_option_allow_large_os_pages, // allow large (2MiB) OS pages, implies eager commit mi_option_reserve_huge_os_pages, // reserve N huge OS pages (1GiB/page) at startup mi_option_reserve_huge_os_pages_at, // reserve huge OS pages at a specific NUMA node mi_option_reserve_os_memory, // reserve specified amount of OS memory in an arena at startup mi_option_deprecated_segment_cache, mi_option_deprecated_page_reset, mi_option_abandoned_page_purge, // immediately purge delayed purges on thread termination mi_option_deprecated_segment_reset, mi_option_eager_commit_delay, mi_option_purge_delay, // memory purging is delayed by N milli seconds; use 0 for immediate purging or -1 for no purging at all. mi_option_use_numa_nodes, // 0 = use all available numa nodes, otherwise use at most N nodes. mi_option_limit_os_alloc, // 1 = do not use OS memory for allocation (but only programmatically reserved arenas) mi_option_os_tag, // tag used for OS logging (macOS only for now) mi_option_max_errors, // issue at most N error messages mi_option_max_warnings, // issue at most N warning messages mi_option_max_segment_reclaim, mi_option_destroy_on_exit, // if set, release all memory on exit; sometimes used for dynamic unloading but can be unsafe. mi_option_arena_reserve, // initial memory size in KiB for arena reservation (1GiB on 64-bit) mi_option_arena_purge_mult, mi_option_purge_extend_delay, _mi_option_last, // legacy option names mi_option_large_os_pages = mi_option_allow_large_os_pages, mi_option_eager_region_commit = mi_option_arena_eager_commit, mi_option_reset_decommits = mi_option_purge_decommits, mi_option_reset_delay = mi_option_purge_delay, mi_option_abandoned_page_reset = mi_option_abandoned_page_purge } mi_option_t; mi_decl_nodiscard mi_decl_export bool mi_option_is_enabled(mi_option_t option); mi_decl_export void mi_option_enable(mi_option_t option); mi_decl_export void mi_option_disable(mi_option_t option); mi_decl_export void mi_option_set_enabled(mi_option_t option, bool enable); mi_decl_export void mi_option_set_enabled_default(mi_option_t option, bool enable); mi_decl_nodiscard mi_decl_export long mi_option_get(mi_option_t option); mi_decl_nodiscard mi_decl_export long mi_option_get_clamp(mi_option_t option, long min, long max); mi_decl_nodiscard mi_decl_export size_t mi_option_get_size(mi_option_t option); mi_decl_export void mi_option_set(mi_option_t option, long value); mi_decl_export void mi_option_set_default(mi_option_t option, long value); // ------------------------------------------------------------------------------------------------------- // "mi" prefixed implementations of various posix, Unix, Windows, and C++ allocation functions. // (This can be convenient when providing overrides of these functions as done in `mimalloc-override.h`.) // note: we use `mi_cfree` as "checked free" and it checks if the pointer is in our heap before free-ing. // ------------------------------------------------------------------------------------------------------- mi_decl_export void mi_cfree(void* p) mi_attr_noexcept; mi_decl_export void* mi__expand(void* p, size_t newsize) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export size_t mi_malloc_size(const void* p) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export size_t mi_malloc_good_size(size_t size) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export size_t mi_malloc_usable_size(const void *p) mi_attr_noexcept; mi_decl_export int mi_posix_memalign(void** p, size_t alignment, size_t size) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_valloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_pvalloc(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict 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); mi_decl_nodiscard mi_decl_export void* mi_reallocarray(void* p, size_t count, size_t size) mi_attr_noexcept mi_attr_alloc_size2(2,3); mi_decl_nodiscard mi_decl_export int mi_reallocarr(void* p, size_t count, size_t size) mi_attr_noexcept; mi_decl_nodiscard mi_decl_export void* mi_aligned_recalloc(void* p, size_t newcount, size_t size, size_t alignment) mi_attr_noexcept; mi_decl_nodiscard 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; mi_decl_nodiscard mi_decl_export mi_decl_restrict unsigned short* mi_wcsdup(const unsigned short* s) mi_attr_noexcept mi_attr_malloc; mi_decl_nodiscard mi_decl_export mi_decl_restrict unsigned char* mi_mbsdup(const unsigned char* s) mi_attr_noexcept mi_attr_malloc; mi_decl_export int mi_dupenv_s(char** buf, size_t* size, const char* name) mi_attr_noexcept; mi_decl_export int mi_wdupenv_s(unsigned short** buf, size_t* size, const unsigned short* name) mi_attr_noexcept; mi_decl_export void mi_free_size(void* p, size_t size) mi_attr_noexcept; mi_decl_export void mi_free_size_aligned(void* p, size_t size, size_t alignment) mi_attr_noexcept; mi_decl_export void mi_free_aligned(void* p, size_t alignment) mi_attr_noexcept; // The `mi_new` wrappers implement C++ semantics on out-of-memory instead of directly returning `NULL`. // (and call `std::get_new_handler` and potentially raise a `std::bad_alloc` exception). mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_new(size_t size) mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_new_aligned(size_t size, size_t alignment) mi_attr_malloc mi_attr_alloc_size(1) mi_attr_alloc_align(2); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_new_nothrow(size_t size) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_new_aligned_nothrow(size_t size, size_t alignment) mi_attr_noexcept mi_attr_malloc mi_attr_alloc_size(1) mi_attr_alloc_align(2); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_new_n(size_t count, size_t size) mi_attr_malloc mi_attr_alloc_size2(1, 2); mi_decl_nodiscard mi_decl_export void* mi_new_realloc(void* p, size_t newsize) mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export void* mi_new_reallocn(void* p, size_t newcount, size_t size) mi_attr_alloc_size2(2, 3); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_heap_alloc_new(mi_heap_t* heap, size_t size) mi_attr_malloc mi_attr_alloc_size(2); mi_decl_nodiscard mi_decl_export mi_decl_restrict void* mi_heap_alloc_new_n(mi_heap_t* heap, size_t count, size_t size) mi_attr_malloc mi_attr_alloc_size2(2, 3); #ifdef __cplusplus } #endif // --------------------------------------------------------------------------------------------- // Implement the C++ std::allocator interface for use in STL containers. // (note: see `mimalloc-new-delete.h` for overriding the new/delete operators globally) // --------------------------------------------------------------------------------------------- #ifdef __cplusplus #include <cstddef> // std::size_t #include <cstdint> // PTRDIFF_MAX #if (__cplusplus >= 201103L) || (_MSC_VER > 1900) // C++11 #include <type_traits> // std::true_type #include <utility> // std::forward #endif template<class T> struct _mi_stl_allocator_common { typedef T value_type; typedef std::size_t size_type; typedef std::ptrdiff_t difference_type; typedef value_type& reference; typedef value_type const& const_reference; typedef value_type* pointer; typedef value_type const* const_pointer; #if ((__cplusplus >= 201103L) || (_MSC_VER > 1900)) // C++11 using propagate_on_container_copy_assignment = std::true_type; using propagate_on_container_move_assignment = std::true_type; using propagate_on_container_swap = std::true_type; template <class U, class ...Args> void construct(U* p, Args&& ...args) { ::new(p) U(std::forward<Args>(args)...); } template <class U> void destroy(U* p) mi_attr_noexcept { p->~U(); } #else void construct(pointer p, value_type const& val) { ::new(p) value_type(val); } void destroy(pointer p) { p->~value_type(); } #endif size_type max_size() const mi_attr_noexcept { return (PTRDIFF_MAX/sizeof(value_type)); } pointer address(reference x) const { return &x; } const_pointer address(const_reference x) const { return &x; } }; template<class T> struct mi_stl_allocator : public _mi_stl_allocator_common<T> { using typename _mi_stl_allocator_common<T>::size_type; using typename _mi_stl_allocator_common<T>::value_type; using typename _mi_stl_allocator_common<T>::pointer; template <class U> struct rebind { typedef mi_stl_allocator<U> other; }; mi_stl_allocator() mi_attr_noexcept = default; mi_stl_allocator(const mi_stl_allocator&) mi_attr_noexcept = default; template<class U> mi_stl_allocator(const mi_stl_allocator<U>&) mi_attr_noexcept { } mi_stl_allocator select_on_container_copy_construction() const { return *this; } void deallocate(T* p, size_type) { mi_free(p); } #if (__cplusplus >= 201703L) // C++17 mi_decl_nodiscard T* allocate(size_type count) { return static_cast<T*>(mi_new_n(count, sizeof(T))); } mi_decl_nodiscard T* allocate(size_type count, const void*) { return allocate(count); } #else mi_decl_nodiscard pointer allocate(size_type count, const void* = 0) { return static_cast<pointer>(mi_new_n(count, sizeof(value_type))); } #endif #if ((__cplusplus >= 201103L) || (_MSC_VER > 1900)) // C++11 using is_always_equal = std::true_type; #endif }; template<class T1,class T2> bool operator==(const mi_stl_allocator<T1>& , const mi_stl_allocator<T2>& ) mi_attr_noexcept { return true; } template<class T1,class T2> bool operator!=(const mi_stl_allocator<T1>& , const mi_stl_allocator<T2>& ) mi_attr_noexcept { return false; } #if (__cplusplus >= 201103L) || (_MSC_VER >= 1900) // C++11 #define MI_HAS_HEAP_STL_ALLOCATOR 1 #include <memory> // std::shared_ptr // Common base class for STL allocators in a specific heap template<class T, bool _mi_destroy> struct _mi_heap_stl_allocator_common : public _mi_stl_allocator_common<T> { using typename _mi_stl_allocator_common<T>::size_type; using typename _mi_stl_allocator_common<T>::value_type; using typename _mi_stl_allocator_common<T>::pointer; _mi_heap_stl_allocator_common(mi_heap_t* hp) : heap(hp) { } /* will not delete nor destroy the passed in heap */ #if (__cplusplus >= 201703L) // C++17 mi_decl_nodiscard T* allocate(size_type count) { return static_cast<T*>(mi_heap_alloc_new_n(this->heap.get(), count, sizeof(T))); } mi_decl_nodiscard T* allocate(size_type count, const void*) { return allocate(count); } #else mi_decl_nodiscard pointer allocate(size_type count, const void* = 0) { return static_cast<pointer>(mi_heap_alloc_new_n(this->heap.get(), count, sizeof(value_type))); } #endif #if ((__cplusplus >= 201103L) || (_MSC_VER > 1900)) // C++11 using is_always_equal = std::false_type; #endif void collect(bool force) { mi_heap_collect(this->heap.get(), force); } template<class U> bool is_equal(const _mi_heap_stl_allocator_common<U, _mi_destroy>& x) const { return (this->heap == x.heap); } protected: std::shared_ptr<mi_heap_t> heap; template<class U, bool D> friend struct _mi_heap_stl_allocator_common; _mi_heap_stl_allocator_common() { mi_heap_t* hp = mi_heap_new(); this->heap.reset(hp, (_mi_destroy ? &heap_destroy : &heap_delete)); /* calls heap_delete/destroy when the refcount drops to zero */ } _mi_heap_stl_allocator_common(const _mi_heap_stl_allocator_common& x) mi_attr_noexcept : heap(x.heap) { } template<class U> _mi_heap_stl_allocator_common(const _mi_heap_stl_allocator_common<U, _mi_destroy>& x) mi_attr_noexcept : heap(x.heap) { } private: static void heap_delete(mi_heap_t* hp) { if (hp != NULL) { mi_heap_delete(hp); } } static void heap_destroy(mi_heap_t* hp) { if (hp != NULL) { mi_heap_destroy(hp); } } }; // STL allocator allocation in a specific heap template<class T> struct mi_heap_stl_allocator : public _mi_heap_stl_allocator_common<T, false> { using typename _mi_heap_stl_allocator_common<T, false>::size_type; mi_heap_stl_allocator() : _mi_heap_stl_allocator_common<T, false>() { } // creates fresh heap that is deleted when the destructor is called mi_heap_stl_allocator(mi_heap_t* hp) : _mi_heap_stl_allocator_common<T, false>(hp) { } // no delete nor destroy on the passed in heap template<class U> mi_heap_stl_allocator(const mi_heap_stl_allocator<U>& x) mi_attr_noexcept : _mi_heap_stl_allocator_common<T, false>(x) { } mi_heap_stl_allocator select_on_container_copy_construction() const { return *this; } void deallocate(T* p, size_type) { mi_free(p); } template<class U> struct rebind { typedef mi_heap_stl_allocator<U> other; }; }; template<class T1, class T2> bool operator==(const mi_heap_stl_allocator<T1>& x, const mi_heap_stl_allocator<T2>& y) mi_attr_noexcept { return (x.is_equal(y)); } template<class T1, class T2> bool operator!=(const mi_heap_stl_allocator<T1>& x, const mi_heap_stl_allocator<T2>& y) mi_attr_noexcept { return (!x.is_equal(y)); } // STL allocator allocation in a specific heap, where `free` does nothing and // the heap is destroyed in one go on destruction -- use with care! template<class T> struct mi_heap_destroy_stl_allocator : public _mi_heap_stl_allocator_common<T, true> { using typename _mi_heap_stl_allocator_common<T, true>::size_type; mi_heap_destroy_stl_allocator() : _mi_heap_stl_allocator_common<T, true>() { } // creates fresh heap that is destroyed when the destructor is called mi_heap_destroy_stl_allocator(mi_heap_t* hp) : _mi_heap_stl_allocator_common<T, true>(hp) { } // no delete nor destroy on the passed in heap template<class U> mi_heap_destroy_stl_allocator(const mi_heap_destroy_stl_allocator<U>& x) mi_attr_noexcept : _mi_heap_stl_allocator_common<T, true>(x) { } mi_heap_destroy_stl_allocator select_on_container_copy_construction() const { return *this; } void deallocate(T*, size_type) { /* do nothing as we destroy the heap on destruct. */ } template<class U> struct rebind { typedef mi_heap_destroy_stl_allocator<U> other; }; }; template<class T1, class T2> bool operator==(const mi_heap_destroy_stl_allocator<T1>& x, const mi_heap_destroy_stl_allocator<T2>& y) mi_attr_noexcept { return (x.is_equal(y)); } template<class T1, class T2> bool operator!=(const mi_heap_destroy_stl_allocator<T1>& x, const mi_heap_destroy_stl_allocator<T2>& y) mi_attr_noexcept { return (!x.is_equal(y)); } #endif // C++11 #endif // __cplusplus #endif
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