make_atomic_impl.hpp
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/*
* Copyright 2016-2017, Intel Corporation
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* modification, are permitted provided that the following conditions
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*
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#ifndef LIBPMEMOBJ_MAKE_ATOMIC_IMPL_HPP
#define LIBPMEMOBJ_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_MAKE_ATOMIC_IMPL_HPP */
life.hpp
Functions for destroying arrays.
array_traits.hpp
Common array traits.
pmem
Definition: allocator.hpp:48
integer_sequence.hpp
Create c++14 style index sequence.