make_persistent_atomic.hpp

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// SPDX-License-Identifier: BSD-3-Clause
/* Copyright 2016-2020, Intel Corporation */
 
#ifndef LIBPMEMOBJ_CPP_MAKE_PERSISTENT_ATOMIC_HPP
#define LIBPMEMOBJ_CPP_MAKE_PERSISTENT_ATOMIC_HPP
 
#include <libpmemobj++/allocation_flag.hpp>
#include <libpmemobj++/detail/check_persistent_ptr_array.hpp>
#include <libpmemobj++/detail/common.hpp>
#include <libpmemobj++/detail/make_atomic_impl.hpp>
#include <libpmemobj++/detail/variadic.hpp>
#include <libpmemobj++/make_persistent_array_atomic.hpp>
#include <libpmemobj++/pexceptions.hpp>
#include <libpmemobj++/pool.hpp>
#include <libpmemobj/atomic_base.h>
 
#include <tuple>
 
namespace pmem
{
 
namespace obj
{
 
template <typename T, typename... Args>
void
make_persistent_atomic(pool_base &pool,
               typename detail::pp_if_not_array<T>::type &ptr,
               allocation_flag_atomic flag, Args &&... args)
{
    auto arg_pack = std::forward_as_tuple(std::forward<Args>(args)...);
    auto ret = pmemobj_xalloc(
        pool.handle(), ptr.raw_ptr(), sizeof(T), detail::type_num<T>(),
        flag.value,
        &detail::obj_constructor<T, decltype(arg_pack), Args...>,
        static_cast<void *>(&arg_pack));
 
    if (ret != 0)
        throw std::bad_alloc();
}
 
template <typename T, typename... Args>
typename std::enable_if<!detail::is_first_arg_same<allocation_flag_atomic,
                           Args...>::value>::type
make_persistent_atomic(pool_base &pool,
               typename detail::pp_if_not_array<T>::type &ptr,
               Args &&... args)
{
    make_persistent_atomic<T>(pool, ptr, allocation_flag_atomic::none(),
                  std::forward<Args>(args)...);
}
 
template <typename T>
void
delete_persistent_atomic(
    typename detail::pp_if_not_array<T>::type &ptr) noexcept
{
    if (ptr == nullptr)
        return;
 
    /* we CAN'T call the destructor */
    pmemobj_free(ptr.raw_ptr());
}
 
} /* namespace obj */
 
} /* namespace pmem */
 
#endif /* LIBPMEMOBJ_CPP_MAKE_PERSISTENT_ATOMIC_HPP */