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48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
//===--- Malloc.h - Aligned malloc interface --------------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides an implementation of C11 aligned_alloc(3) for platforms
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// that don't have it yet, using posix_memalign(3).
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BASIC_MALLOC_H
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#define SWIFT_BASIC_MALLOC_H
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#include <cassert>
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#include <cstdlib>
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namespace swift {
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// FIXME: Use C11 aligned_alloc or Windows _aligned_malloc if available.
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inline void *AlignedAlloc(size_t size, size_t align) {
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// posix_memalign only accepts alignments greater than sizeof(void*).
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//
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if (align < sizeof(void*))
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align = sizeof(void*);
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void *r;
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int res = posix_memalign(&r, align, size);
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assert(res == 0 && "posix_memalign failed");
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(void)res; // Silence the unused variable warning.
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return r;
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}
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// FIXME: Use Windows _aligned_free if available.
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inline void AlignedFree(void *p) {
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free(p);
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}
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} // end namespace swift
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#endif // SWIFT_BASIC_MALLOC_H
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