make_atomic_impl.hpp

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/*
 * Copyright 2016-2019, Intel Corporation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
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 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#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 */