make_persistent_array.hpp

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/*
 * Copyright 2016, Intel Corporation
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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 PMEMOBJ_MAKE_PERSISTENT_ARRAY_HPP
#define PMEMOBJ_MAKE_PERSISTENT_ARRAY_HPP

#include "libpmemobj++/detail/array_traits.hpp"
#include "libpmemobj++/detail/check_persistent_ptr_array.hpp"
#include "libpmemobj++/detail/common.hpp"
#include "libpmemobj++/detail/life.hpp"
#include "libpmemobj++/detail/pexceptions.hpp"
#include "libpmemobj/tx_base.h"

namespace nvml
{

namespace obj
{

template <typename T>
typename detail::pp_if_array<T>::type
make_persistent(std::size_t N)
{
    typedef typename detail::pp_array_type<T>::type I;

    if (pmemobj_tx_stage() != TX_STAGE_WORK)
        throw transaction_scope_error(
            "refusing to allocate "
            "memory outside of transaction scope");

    persistent_ptr<T> ptr =
        pmemobj_tx_alloc(sizeof(I) * N, detail::type_num<I>());

    if (ptr == nullptr)
        throw transaction_alloc_error("failed to allocate "
                          "persistent memory array");

    std::size_t i;
    try {
        for (i = 0; i < N; ++i)
            detail::create<I>(ptr.get() + i);
    } catch (...) {
        for (std::size_t j = 1; j <= i; ++j)
            detail::destroy<I>(ptr[i - j]);
        pmemobj_tx_free(*ptr.raw_ptr());
        throw;
    }

    return ptr;
}

template <typename T>
typename detail::pp_if_size_array<T>::type
make_persistent()
{
    typedef typename detail::pp_array_type<T>::type I;
    enum { N = detail::pp_array_elems<T>::elems };

    if (pmemobj_tx_stage() != TX_STAGE_WORK)
        throw transaction_scope_error(
            "refusing to allocate "
            "memory outside of transaction scope");

    persistent_ptr<T> ptr =
        pmemobj_tx_alloc(sizeof(I) * N, detail::type_num<I>());

    if (ptr == nullptr)
        throw transaction_alloc_error("failed to allocate "
                          "persistent memory array");

    std::size_t i;
    try {
        for (i = 0; i < N; ++i)
            detail::create<I>(ptr.get() + i);
    } catch (...) {
        for (std::size_t j = 1; j <= i; ++j)
            detail::destroy<I>(ptr[i - j]);
        pmemobj_tx_free(*ptr.raw_ptr());
        throw;
    }

    return ptr;
}

template <typename T>
void
delete_persistent(typename detail::pp_if_array<T>::type ptr, std::size_t N)
{
    typedef typename detail::pp_array_type<T>::type I;

    if (pmemobj_tx_stage() != TX_STAGE_WORK)
        throw transaction_scope_error(
            "refusing to free "
            "memory outside of transaction scope");

    if (ptr == nullptr)
        return;

    for (std::size_t i = 0; i < N; ++i)
        detail::destroy<I>(ptr[N - 1 - i]);

    if (pmemobj_tx_free(*ptr.raw_ptr()) != 0)
        throw transaction_alloc_error("failed to delete "
                          "persistent memory object");
}

template <typename T>
void
delete_persistent(typename detail::pp_if_size_array<T>::type ptr)
{
    typedef typename detail::pp_array_type<T>::type I;
    enum { N = detail::pp_array_elems<T>::elems };

    if (pmemobj_tx_stage() != TX_STAGE_WORK)
        throw transaction_scope_error(
            "refusing to free "
            "memory outside of transaction scope");

    if (ptr == nullptr)
        return;

    for (std::size_t i = 0; i < N; ++i)
        detail::destroy<I>(ptr[N - 1 - i]);

    if (pmemobj_tx_free(*ptr.raw_ptr()) != 0)
        throw transaction_alloc_error("failed to delete "
                          "persistent memory object");
}

} /* namespace obj */

} /* namespace nvml */

#endif /* PMEMOBJ_MAKE_PERSISTENT_ARRAY_HPP */