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Code Issues Releases Wiki Activity

ircd::allocator: Meet posix spec requirements for posix_memalign().

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This commit is contained in:
Jason Volk 2019-04-18 00:43:44 -07:00
parent 51b3e63959
commit 91bed23951
1 changed files with 16 additions and 7 deletions
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23
ircd/allocator.cc
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@ -475,18 +475,27 @@ ircd::allocator::operator+=(profile &a,
// //
std::unique_ptr<char, decltype(&std::free)> std::unique_ptr<char, decltype(&std::free)>
ircd::allocator::aligned_alloc(const size_t &align, ircd::allocator::aligned_alloc(const size_t &alignment_,
const size_t &size) const size_t &size_)
{ {
static const size_t &align_default{16}; static const size_t &align_default
const size_t &alignment
{ {
align?: align_default 16
};
const size_t &alignment
{
alignment_?: align_default
};
const size_t &size
{
size_ % alignment == 0? size_: size_ + (alignment - (size_ % alignment))
}; };
assert(alignment % 2UL == 0);
assert(alignment % sizeof(void *) == 0);
assert(size % alignment == 0); assert(size % alignment == 0);
assert(size < size_ + alignment);
assert(alignment % sizeof(void *) == 0);
void *ret; void *ret;
switch(int errc(::posix_memalign(&ret, alignment, size)); errc) switch(int errc(::posix_memalign(&ret, alignment, size)); errc)