77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
#pragma once
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#ifdef SNMALLOC_PASS_THROUGH
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# if defined(__HAIKU__)
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# define _GNU_SOURCE
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# endif
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# include <stdlib.h>
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# if defined(_WIN32) //|| defined(__APPLE__)
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# error "Pass through not supported on this platform"
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// The Windows aligned allocation API is not capable of supporting the
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// snmalloc API Apple was not providing aligned memory in some tests.
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# else
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// Defines malloc_size for the platform.
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# if defined(_WIN32)
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namespace snmalloc::external_alloc
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{
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inline size_t malloc_usable_size(void* ptr)
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{
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return _msize(ptr);
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}
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}
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# elif defined(__APPLE__)
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# include <malloc/malloc.h>
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namespace snmalloc::external_alloc
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{
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inline size_t malloc_usable_size(void* ptr)
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{
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return malloc_size(ptr);
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}
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}
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# elif defined(__linux__) || defined(__HAIKU__)
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# include <malloc.h>
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namespace snmalloc::external_alloc
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{
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using ::malloc_usable_size;
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}
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# elif defined(__sun) || defined(__NetBSD__) || defined(__OpenBSD__)
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namespace snmalloc::external_alloc
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{
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using ::malloc_usable_size;
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}
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# elif defined(__FreeBSD__)
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# include <malloc_np.h>
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namespace snmalloc::external_alloc
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{
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using ::malloc_usable_size;
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}
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# else
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# error Define malloc size macro for this platform.
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# endif
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namespace snmalloc::external_alloc
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{
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inline void* aligned_alloc(size_t alignment, size_t size)
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{
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// TSAN complains if allocation is large than this.
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if constexpr (bits::BITS == 64)
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{
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if (size >= 0x10000000000)
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return nullptr;
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}
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if (alignment < sizeof(void*))
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alignment = sizeof(void*);
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void* result;
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if (posix_memalign(&result, alignment, size) != 0)
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{
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result = nullptr;
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}
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return result;
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}
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using ::free;
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}
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# endif
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#endif
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