Updating for 1.0.2 release
[awesomized/libmemcached] / libmemcached / allocators.cc
1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
2 *
3 * Libmemcached library
4 *
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 */
37
38 #include <libmemcached/common.h>
39
40 void _libmemcached_free(const memcached_st*, void *mem, void*)
41 {
42 if (mem)
43 {
44 free(mem);
45 }
46 }
47
48 void *_libmemcached_malloc(const memcached_st *, size_t size, void *)
49 {
50 return malloc(size);
51 }
52
53 void *_libmemcached_realloc(const memcached_st*, void *mem, size_t size, void *)
54 {
55 return realloc(mem, size);
56 }
57
58 void *_libmemcached_calloc(const memcached_st *self, size_t nelem, size_t size, void *context)
59 {
60 if (self->allocators.malloc != _libmemcached_malloc)
61 {
62 void *ret = _libmemcached_malloc(self, nelem * size, context);
63 if (not ret)
64 {
65 memset(ret, 0, nelem * size);
66 }
67
68 return ret;
69 }
70
71 return calloc(nelem, size);
72 }
73
74 struct memcached_allocator_t memcached_allocators_return_default(void)
75 {
76 static struct memcached_allocator_t global_default_allocator= { _libmemcached_calloc, _libmemcached_free, _libmemcached_malloc, _libmemcached_realloc, 0 };
77 return global_default_allocator;
78 }
79
80 memcached_return_t memcached_set_memory_allocators(memcached_st *self,
81 memcached_malloc_fn mem_malloc,
82 memcached_free_fn mem_free,
83 memcached_realloc_fn mem_realloc,
84 memcached_calloc_fn mem_calloc,
85 void *context)
86 {
87 if (self == NULL)
88 {
89 return MEMCACHED_INVALID_ARGUMENTS;
90 }
91
92 /* All should be set, or none should be set */
93 if (mem_malloc == NULL and mem_free == NULL and mem_realloc == NULL and mem_calloc == NULL)
94 {
95 self->allocators= memcached_allocators_return_default();
96 }
97 else if (mem_malloc == NULL or mem_free == NULL or mem_realloc == NULL or mem_calloc == NULL)
98 {
99 return memcached_set_error(*self, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT, memcached_literal_param("NULL parameter provided for one or more allocators"));
100 }
101 else
102 {
103 self->allocators.malloc= mem_malloc;
104 self->allocators.free= mem_free;
105 self->allocators.realloc= mem_realloc;
106 self->allocators.calloc= mem_calloc;
107 self->allocators.context= context;
108 }
109
110 return MEMCACHED_SUCCESS;
111 }
112
113 void *memcached_get_memory_allocators_context(const memcached_st *self)
114 {
115 return self->allocators.context;
116 }
117
118 void memcached_get_memory_allocators(const memcached_st *self,
119 memcached_malloc_fn *mem_malloc,
120 memcached_free_fn *mem_free,
121 memcached_realloc_fn *mem_realloc,
122 memcached_calloc_fn *mem_calloc)
123 {
124 if (self == NULL)
125 {
126 return;
127 }
128
129 *mem_malloc= self->allocators.malloc;
130 *mem_free= self->allocators.free;
131 *mem_realloc= self->allocators.realloc;
132 *mem_calloc= self->allocators.calloc;
133 }