Merge commit 'efcea3a80da7c4479d5fe168435ecc9fd06bdc72' as 'subprojects/boost-sqlite'

1 files changed, 48 insertions, 0 deletions

diff --git a/subprojects/boost-sqlite/include/boost/sqlite/allocator.hpp b/subprojects/boost-sqlite/include/boost/sqlite/allocator.hpp
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+++ b/subprojects/boost-sqlite/include/boost/sqlite/allocator.hpp
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+//
+// Copyright (c) 2022 Klemens Morgenstern (klemens.morgenstern@gmx.net)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_SQLITE_ALLOCATOR_HPP
+#define BOOST_SQLITE_ALLOCATOR_HPP
+
+#include <boost/sqlite/detail/config.hpp>
+
+#include <cstddef>
+#include <cstdint>
+
+BOOST_SQLITE_BEGIN_NAMESPACE
+
+template<typename T>
+struct allocator
+{
+  constexpr allocator() noexcept {}
+  constexpr allocator( const allocator& other ) noexcept {}
+  template< class U >
+  constexpr allocator( const allocator<U>& other ) noexcept {}
+
+#if defined(SQLITE_4_BYTE_ALIGNED_MALLOC)
+  constexpr static std::size_t alignment = 4u;
+#else
+  constexpr static std::size_t alignment = 8u;
+#endif
+
+  static_assert(alignof(T) <= alignment, "T alignment can't be fulfilled by sqlite");
+  [[nodiscard]] T* allocate( std::size_t n )
+  {
+    auto p = static_cast<T*>(sqlite3_malloc64(n * sizeof(T)));
+    if (p == nullptr)
+      boost::throw_exception(std::bad_alloc());
+    return p;
+  }
+  void deallocate( T* p, std::size_t)
+  {
+    return sqlite3_free(p);
+  }
+};
+
+BOOST_SQLITE_END_NAMESPACE
+
+#endif //BOOST_SQLITE_ALLOCATOR_HPP