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Ported #962 to C++.

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Improved alignment calculation logic.
Fixed test for zone.
Now, align parameter must be 2^n (n >=0). e.g. 1,2,4,8,16, ...
This commit is contained in:
Takatoshi Kondo
2021-08-29 12:40:28 +09:00
parent 76f5af0593
commit 860f7fce55
5 changed files with 37 additions and 9 deletions
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7
include/msgpack/v1/detail/cpp11_zone.hpp
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@@ -18,6 +18,8 @@
#include <memory>
#include <vector>
#include <boost/assert.hpp>
namespace msgpack {
/// @cond
@@ -230,10 +232,11 @@ inline zone::zone(size_t chunk_size) noexcept:m_chunk_size(chunk_size), m_chunk_
inline char* zone::get_aligned(char* ptr, size_t align)
{
BOOST_ASSERT(align != 0 && (align & (align - 1)) == 0); // align must be 2^n (n >= 0)
return
reinterpret_cast<char*>(
reinterpret_cast<size_t>(
(ptr + (align - 1))) / align * align);
reinterpret_cast<uintptr_t>(ptr + (align - 1)) & ~static_cast<uintptr_t>(align - 1)
);
}
inline void* zone::allocate_align(size_t size, size_t align)