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/*
* Copyright 2016-2018, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* 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.
*
* * Neither the name of the copyright holder nor the names of its
* 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
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file
* Implementation details of atomic allocation and construction.
*/
#ifndef LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP
#define LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP
#include <new>
#include <stddef.h>
#include <libpmemobj++/detail/array_traits.hpp>
#include <libpmemobj++/detail/integer_sequence.hpp>
#include <libpmemobj++/detail/life.hpp>
namespace pmem
{
namespace detail
{
/*
* Calls the objects constructor.
*
* Unpacks the tuple to get constructor's parameters.
*/
template <typename T, size_t... Indices, typename... Args>
void
create_object(void *ptr, index_sequence<Indices...>, std::tuple<Args...> &tuple)
{
new (ptr) T(std::get<Indices>(tuple)...);
}
/*
* C-style function called by the allocator.
*
* The arg is a tuple containing constructor parameters.
*/
template <typename T, typename... Args>
int
obj_constructor(PMEMobjpool *pop, void *ptr, void *arg)
{
auto *arg_pack = static_cast<std::tuple<Args &...> *>(arg);
typedef typename make_index_sequence<Args...>::type index;
try {
create_object<T>(ptr, index(), *arg_pack);
} catch (...) {
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 */
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