1PMEMOBJ_TX_ALLOC(3) PMDK Programmer's Manual PMEMOBJ_TX_ALLOC(3)
2
6 pmemobj_tx_alloc(), pmemobj_tx_zalloc(), pmemobj_tx_xalloc(), pmemo‐
7 bj_tx_realloc(), pmemobj_tx_zrealloc(), pmemobj_tx_strdup(), pmemo‐
8 bj_tx_wcsdup(), pmemobj_tx_free(),
9 TX_NEW(), TX_ALLOC(), TX_ZNEW(), TX_ZALLOC(), TX_XALLOC(), TX_REAL‐
11 LOC(), TX_ZREALLOC(), TX_STRDUP(), TX_WCSDUP(), TX_FREE() - transac‐
12 tional object manipulation
13
15 #include <libpmemobj.h>
16 PMEMoid pmemobj_tx_alloc(size_t size, uint64_t type_num);
18 PMEMoid pmemobj_tx_zalloc(size_t size, uint64_t type_num);
19 PMEMoid pmemobj_tx_xalloc(size_t size, uint64_t type_num, uint64_t flags);
20 PMEMoid pmemobj_tx_realloc(PMEMoid oid, size_t size, uint64_t type_num);
21 PMEMoid pmemobj_tx_zrealloc(PMEMoid oid, size_t size, uint64_t type_num);
22 PMEMoid pmemobj_tx_strdup(const char *s, uint64_t type_num);
23 PMEMoid pmemobj_tx_wcsdup(const wchar_t *s, uint64_t type_num);
24 int pmemobj_tx_free(PMEMoid oid);
25 TX_NEW(TYPE)
27 TX_ALLOC(TYPE, size_t size)
28 TX_ZNEW(TYPE)
29 TX_ZALLOC(TYPE, size_t size)
30 TX_XALLOC(TYPE, size_t size, uint64_t flags)
31 TX_REALLOC(TOID o, size_t size)
32 TX_ZREALLOC(TOID o, size_t size)
33 TX_STRDUP(const char *s, uint64_t type_num)
34 TX_WCSDUP(const wchar_t *s, uint64_t type_num)
35 TX_FREE(TOID o)
36
38 The pmemobj_tx_alloc() function transactionally allocates a new object
39 of given size and type_num. In contrast to the non-transactional allo‐
40 cations, the objects are added to the internal object containers of
41 given type_num only after the transaction is committed, making the ob‐
42 jects visible to the POBJ_FOREACH_*() macros. This function must be
43 called during TX_STAGE_WORK.
44 The pmemobj_tx_zalloc() function transactionally allocates a new zeroed
46 object of given size and type_num. This function must be called during
47 TX_STAGE_WORK.
48 The pmemobj_tx_xalloc() function transactionally allocates a new object
50 of given size and type_num. The flags argument is a bitmask of the
51 following values:
52 · POBJ_XALLOC_ZERO - zero the object (equivalent of pmemobj_tx_zalloc)
54 · POBJ_XALLOC_NO_FLUSH - skip flush on commit (when application deals
56 with flushing or uses pmemobj_memcpy_persist)
57 · POBJ_CLASS_ID(class_id) - allocate the object from the allocation
59 class with id equal to class_id
60 This function must be called during TX_STAGE_WORK.
62 The pmemobj_tx_realloc() function transactionally resizes an existing
64 object to the given size and changes its type to type_num. If oid is
65 OID_NULL, then the call is equivalent to pmemobj_tx_alloc(pop, size,
66 type_num). If size is equal to zero and oid is not OID_NULL, then the
67 call is equivalent to pmemobj_tx_free(oid). If the new size is larger
68 than the old size, the added memory will not be initialized. This
69 function must be called during TX_STAGE_WORK.
70 The pmemobj_tx_zrealloc() function transactionally resizes an existing
72 object to the given size and changes its type to type_num. If the new
73 size is larger than the old size, the extended new space is zeroed.
74 This function must be called during TX_STAGE_WORK.
75 The pmemobj_tx_strdup() function transactionally allocates a new object
77 containing a duplicate of the string s and assigns it a type type_num.
78 This function must be called during TX_STAGE_WORK.
79 The pmemobj_tx_wcsdup() function transactionally allocates a new object
81 containing a duplicate of the wide character string s and assigns it a
82 type type_num. This function must be called during TX_STAGE_WORK.
83 The pmemobj_tx_free() function transactionally frees an existing object
85 referenced by oid. This function must be called during TX_STAGE_WORK.
86 The TX_NEW() macro transactionally allocates a new object of given TYPE
88 and assigns it a type number read from the typed OID. The allocation
89 size is determined from the size of the user-defined structure TYPE.
90 If successful and called during TX_STAGE_WORK it returns a handle to
91 the newly allocated object. Otherwise, the stage is changed to
92 TX_STAGE_ONABORT, OID_NULL is returned, and errno is set appropriately.
93 The TX_ALLOC() macro transactionally allocates a new object of given
95 TYPE and assigns it a type number read from the typed OID. The alloca‐
96 tion size is passed by size parameter. If successful and called during
97 TX_STAGE_WORK it returns a handle to the newly allocated object. Oth‐
98 erwise, the stage is set to TX_STAGE_ONABORT, OID_NULL is returned, and
99 errno is set appropriately.
100 The TX_ZNEW() macro transactionally allocates a new zeroed object of
102 given TYPE and assigns it a type number read from the typed OID. The
103 allocation size is determined from the size of the user-defined struc‐
104 ture TYPE. If successful and called during TX_STAGE_WORK it returns a
105 handle to the newly allocated object. Otherwise, stage changes to
106 TX_STAGE_ONABORT, OID_NULL is returned, and errno is set appropriately.
107 The TX_ZALLOC() macro transactionally allocates a new zeroed object of
109 given TYPE and assigns it a type number read from the typed OID. The
110 allocation size is passed by size argument. If successful and called
111 during TX_STAGE_WORK it returns a handle to the newly allocated object.
112 Otherwise, the stage is changed to TX_STAGE_ONABORT, OID_NULL is re‐
113 turned, and errno is set appropriately.
114 The TX_XALLOC() macro transactionally allocates a new object of given
116 TYPE and assigns it a type number read from the typed OID. The alloca‐
117 tion size is passed by size argument. The flags argument is a bitmask
118 of values described in pmemobj_tx_xalloc section. If successful and
119 called during TX_STAGE_WORK it returns a handle to the newly allocated
120 object. Otherwise, the stage is changed to TX_STAGE_ONABORT, OID_NULL
121 is returned, and errno is set appropriately.
122 The TX_REALLOC() macro transactionally resizes an existing object ref‐
124 erenced by a handle o to the given size. If successful and called dur‐
125 ing TX_STAGE_WORK it returns a handle to the reallocated object. Oth‐
126 erwise, the stage is changed to TX_STAGE_ONABORT, OID_NULL is returned,
127 and errno is set appropriately.
128 The TX_ZREALLOC() macro transactionally resizes an existing object ref‐
130 erenced by a handle o to the given size. If the new size is larger
131 than the old size, the extended new space is zeroed. If successful and
132 called during TX_STAGE_WORK it returns a handle to the reallocated ob‐
133 ject. Otherwise, the stage is changed to TX_STAGE_ONABORT, OID_NULL is
134 returned, and errno is set appropriately.
135 The TX_STRDUP() macro transactionally allocates a new object containing
137 a duplicate of the string s and assigns it type type_num. If success‐
138 ful and called during TX_STAGE_WORK it returns a handle to the newly
139 allocated object. Otherwise, the stage is changed to TX_STAGE_ONABORT,
140 OID_NULL is returned, and errno is set appropriately.
141 The TX_WCSDUP() macro transactionally allocates a new object containing
143 a duplicate of the wide character string s and assigns it a type
144 type_num. If successful and called during TX_STAGE_WORK, it returns a
145 handle to the newly allocated object. Otherwise, the stage is changed
146 to TX_STAGE_ONABORT, OID_NULL is returned, and errno is set appropri‐
147 ately.
148 The TX_FREE() macro transactionally frees the memory space represented
150 by an object handle o. If o is OID_NULL, no operation is performed.
151 If successful and called during TX_STAGE_WORK, TX_FREE() returns 0.
152 Otherwise, the stage is changed to TX_STAGE_ONABORT and an error number
153 is returned.
154
156 On success, the pmemobj_tx_alloc() ,pmemobj_tx_zalloc(), pmemo‐
157 bj_tx_xalloc(), pmemobj_tx_strdup() and pmemobj_tx_wcsdup() functions
158 return a handle to the newly allocated object. Otherwise, the stage is
159 changed to TX_STAGE_ONABORT, OID_NULL is returned, and errno is set ap‐
160 propriately. If size equals 0, OID_NULL is returned and errno is set
161 appropriately.
162 On success, pmemobj_tx_realloc() and pmemobj_tx_zrealloc() return a
164 handle to the resized object. Otherwise, the stage is changed to
165 TX_STAGE_ONABORT, OID_NULL is returned, and errno is set appropriately.
166 Note that the object handle value may change as a result of realloca‐
167 tion.
168 On success, pmemobj_tx_free() returns 0. Otherwise, the stage is set
170 to TX_STAGE_ONABORT and an error number is returned.
171
173 pmemobj_tx_add_range(3), **pmemobj_tx_begin*(3), libpmemobj(7) and
174 <http://pmem.io>
175PMDK - pmemobj API version 2.3 2018-07-18 PMEMOBJ_TX_ALLOC(3)