make_atomic_impl.hpp

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// SPDX-License-Identifier: BSD-3-Clause
/* Copyright 2016-2019, Intel Corporation */
 
#ifndef LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP
#define LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP
 
#include <cstddef>
#include <new>
 
#include <libpmemobj++/detail/array_traits.hpp>
#include <libpmemobj++/detail/integer_sequence.hpp>
#include <libpmemobj++/detail/life.hpp>
 
namespace pmem
{
 
namespace detail
{
 
/*
 * C-style function called by the allocator.
 *
 * The arg is a tuple containing constructor parameters.
 */
template <typename T, typename Tuple, typename... Args>
int
obj_constructor(PMEMobjpool *pop, void *ptr, void *arg)
{
    auto ret = c_style_construct<T, Tuple, Args...>(ptr, arg);
 
    if (ret != 0)
        return -1;
 
    pmemobj_persist(pop, ptr, sizeof(T));
 
    return 0;
}
 
/*
 * Constructor used for atomic array allocations.
 *
 * Returns -1 if an exception was thrown during T's construction,
 * 0 otherwise.
 */
template <typename T>
int
array_constructor(PMEMobjpool *pop, void *ptr, void *arg)
{
    std::size_t N = *static_cast<std::size_t *>(arg);
 
    T *tptr = static_cast<T *>(ptr);
    try {
        for (std::size_t i = 0; i < N; ++i)
            detail::create<T>(tptr + i);
    } catch (...) {
        return -1;
    }
 
    pmemobj_persist(pop, ptr, sizeof(T) * N);
 
    return 0;
}
 
} /* namespace detail */
 
} /* namespace pmem */
 
#endif /* LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP */