PMDK C++ bindings  1.7
This is the C++ bindings documentation for PMDK's libpmemobj.
make_persistent.hpp
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32 
40 #ifndef LIBPMEMOBJ_CPP_MAKE_PERSISTENT_HPP
41 #define LIBPMEMOBJ_CPP_MAKE_PERSISTENT_HPP
42 
50 #include <libpmemobj/tx_base.h>
51 
52 #include <new>
53 #include <utility>
54 
55 namespace pmem
56 {
57 
58 namespace obj
59 {
60 
77 template <typename T, typename... Args>
78 typename detail::pp_if_not_array<T>::type
79 make_persistent(allocation_flag flag, Args &&... args)
80 {
81  if (pmemobj_tx_stage() != TX_STAGE_WORK)
83  "refusing to allocate memory outside of transaction scope");
84 
85  persistent_ptr<T> ptr =
86  pmemobj_tx_xalloc(sizeof(T), detail::type_num<T>(), flag.value);
87 
88  if (ptr == nullptr)
90  "failed to allocate persistent memory object");
91 
92  detail::create<T, Args...>(ptr.get(), std::forward<Args>(args)...);
93 
94  return ptr;
95 }
96 
112 template <typename T, typename... Args>
113 typename std::enable_if<
114  !detail::is_first_arg_same<allocation_flag, Args...>::value,
115  typename detail::pp_if_not_array<T>::type>::type
116 make_persistent(Args &&... args)
117 {
118  return make_persistent<T>(allocation_flag::none(),
119  std::forward<Args>(args)...);
120 }
121 
136 template <typename T>
137 void
139 {
140  if (pmemobj_tx_stage() != TX_STAGE_WORK)
142  "refusing to free memory outside of transaction scope");
143 
144  if (ptr == nullptr)
145  return;
146 
147  /*
148  * At this point, everything in the object should be tracked
149  * and reverted on transaction abort.
150  */
151  detail::destroy<T>(*ptr);
152 
153  if (pmemobj_tx_free(*ptr.raw_ptr()) != 0)
155  "failed to delete persistent memory object");
156 }
157 
158 } /* namespace obj */
159 
160 } /* namespace pmem */
161 
162 #endif /* LIBPMEMOBJ_CPP_MAKE_PERSISTENT_HPP */
pmem::obj::delete_persistent
void delete_persistent(typename detail::pp_if_not_array< T >::type ptr)
Transactionally free an object of type T held in a persistent_ptr.
Definition: make_persistent.hpp:138
pmem::transaction_free_error
Custom transaction error class.
Definition: pexceptions.hpp:94
pmem::obj::make_persistent
detail::pp_if_not_array< T >::type make_persistent(allocation_flag flag, Args &&... args)
Transactionally allocate and construct an object of type T.
Definition: make_persistent.hpp:79
common.hpp
Commonly used functionality.
pexceptions.hpp
Custom exceptions.
check_persistent_ptr_array.hpp
Compile time type check for make_persistent.
make_persistent_array.hpp
Persistent_ptr allocation functions for arrays.
pmem::obj::persistent_ptr
Persistent pointer class.
Definition: persistent_ptr.hpp:132
pmem::obj::allocation_flag::none
static allocation_flag none()
Do not change allocator behaviour.
Definition: allocation_flag.hpp:90
life.hpp
Functions for destroying arrays.
pmem::obj::allocation_flag
Type of flag which can be passed to make_persistent.
Definition: allocation_flag.hpp:60
pmem::transaction_scope_error
Custom transaction error class.
Definition: pexceptions.hpp:104
variadic.hpp
Helper functionality for handling variadic templates.
allocation_flag.hpp
allocation_flag - defines flags which can be passed to make_persistent
pmem::transaction_alloc_error
Custom transaction error class.
Definition: pexceptions.hpp:84