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Use aligned_alloc when the platform we use supports it

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aligned_alloc is the preferred way to do AlignedAlloc when we can support that, with the other code being a fallback if that is not the case.
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Rose
2023-12-14 17:19:10 -05:00
parent 1f9b074a8d
commit 3348bdd6dc
1 changed files with 8 additions and 6 deletions
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14
include/swift/Basic/Malloc.h
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@@ -27,17 +27,19 @@
namespace swift {
// FIXME: Use C11 aligned_alloc if available.
inline void *AlignedAlloc(size_t size, size_t align) {
// posix_memalign only accepts alignments greater than sizeof(void*).
//
if (align < sizeof(void*))
align = sizeof(void*);
#if defined(_WIN32)
void *r = _aligned_malloc(size, align);
assert(r && "_aligned_malloc failed");
#elif __STDC_VERSION__-0 >= 201112l
// C11 supports aligned_alloc
void *r = aligned_alloc(align, size);
assert(r && "aligned_alloc failed");
#else
// posix_memalign only accepts alignments greater than sizeof(void*).
if (align < sizeof(void *))
align = sizeof(void *);
void *r = nullptr;
int res = posix_memalign(&r, align, size);
assert(res == 0 && "posix_memalign failed");