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#ifndef ALLOCATOR_H
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#define ALLOCATOR_H
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#include <stdio.h>
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#include <malloc.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef H_MALLOC_PREFIX
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#define h_malloc malloc
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#define h_calloc calloc
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#define h_realloc realloc
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#define h_aligned_alloc aligned_alloc
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#define h_free free
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#define h_posix_memalign posix_memalign
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#define h_malloc_usable_size malloc_usable_size
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#define h_mallopt mallopt
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#define h_malloc_trim malloc_trim
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#define h_malloc_stats malloc_stats
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#define h_mallinfo mallinfo
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#define h_mallinfo2 mallinfo2
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#define h_malloc_info malloc_info
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#define h_memalign memalign
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#define h_valloc valloc
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#define h_pvalloc pvalloc
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#define h_cfree cfree
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#define h_malloc_get_state malloc_get_state
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#define h_malloc_set_state malloc_set_state
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#define h_mallinfo_narenas mallinfo_narenas
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#define h_mallinfo_nbins mallinfo_nbins
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#define h_mallinfo_arena_info mallinfo_arena_info
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#define h_mallinfo_bin_info mallinfo_bin_info
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#define h_malloc_iterate malloc_iterate
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#define h_malloc_disable malloc_disable
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#define h_malloc_enable malloc_enable
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#define h_malloc_object_size malloc_object_size
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#define h_malloc_object_size_fast malloc_object_size_fast
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#define h_free_sized free_sized
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#endif
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// C standard
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void *h_malloc(size_t size);
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void *h_calloc(size_t nmemb, size_t size);
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void *h_realloc(void *ptr, size_t size);
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void *h_aligned_alloc(size_t alignment, size_t size);
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void h_free(void *ptr);
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// POSIX
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int h_posix_memalign(void **memptr, size_t alignment, size_t size);
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#ifdef __ANDROID__
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#define H_MALLOC_USABLE_SIZE_CONST const
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#else
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#define H_MALLOC_USABLE_SIZE_CONST
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#endif
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// glibc extensions
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size_t h_malloc_usable_size(H_MALLOC_USABLE_SIZE_CONST void *ptr);
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int h_mallopt(int param, int value);
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int h_malloc_trim(size_t pad);
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void h_malloc_stats(void);
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#if defined(__GLIBC__) || defined(__ANDROID__)
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struct mallinfo h_mallinfo(void);
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#endif
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#ifndef __ANDROID__
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int h_malloc_info(int options, FILE *fp);
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#endif
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// obsolete glibc extensions
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void *h_memalign(size_t alignment, size_t size);
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#ifndef __ANDROID__
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void *h_valloc(size_t size);
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void *h_pvalloc(size_t size);
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#endif
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#ifdef __GLIBC__
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void h_cfree(void *ptr) __THROW;
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void *h_malloc_get_state(void);
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int h_malloc_set_state(void *state);
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#endif
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// Android extensions
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#ifdef __ANDROID__
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size_t h_mallinfo_narenas(void);
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size_t h_mallinfo_nbins(void);
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struct mallinfo h_mallinfo_arena_info(size_t arena);
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struct mallinfo h_mallinfo_bin_info(size_t arena, size_t bin);
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int h_malloc_iterate(uintptr_t base, size_t size, void (*callback)(uintptr_t ptr, size_t size, void *arg),
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void *arg);
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void h_malloc_disable(void);
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void h_malloc_enable(void);
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#endif
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// hardened_malloc extensions
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// return an upper bound on object size for any pointer based on malloc metadata
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size_t h_malloc_object_size(void *ptr);
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// similar to malloc_object_size, but avoiding locking so the results are much more limited
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size_t h_malloc_object_size_fast(void *ptr);
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// The free function with an extra parameter for passing the size requested at
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// allocation time.
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//
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// This offers the same functionality as C++14 sized deallocation and can be
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// used to implement it.
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//
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// A performance-oriented allocator would use this as a performance
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// enhancement with undefined behavior on a mismatch. Instead, this hardened
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// allocator implementation uses it to improve security by checking that the
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// passed size matches the allocated size.
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void h_free_sized(void *ptr, size_t expected_size);
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#ifdef __cplusplus
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}
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#endif
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#endif
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