summaryrefslogtreecommitdiffstats
path: root/lib/src/test/test_slab.cc
blob: 15deff3c1a21678901dc9183dc8c9e6c208af055 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
/*
 * Copyright (c) 2022 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <gtest/gtest.h>

extern "C"
{
#include <hicn/util/slab.h>
}

class SlabTest : public ::testing::Test
{
protected:
  SlabTest () {}
  virtual ~SlabTest () { slab_free (slab); }

  slab_t *slab;
};

typedef struct
{
  int index;
  int val;
} element_t;

TEST_F (SlabTest, SlabCreateAndGetSingleChunk)
{
  slab = slab_create (element_t, 16);
  ASSERT_NE (slab, nullptr);

  element_t *e = slab_get (element_t, slab);
  ASSERT_NE (e, nullptr);
  slab_put (slab, e);
}

TEST_F (SlabTest, SlabGetChunks)
{
  slab = slab_create (element_t, 2);

  // Force creation of multiple blocks (since initial size is only 2)
  for (int i = 0; i < 100; i++)
    {
      element_t *e = slab_get (element_t, slab);
      EXPECT_NE (e, nullptr);
    }
}

TEST_F (SlabTest, SlabGetAndPutChunksNoResize)
{
  constexpr int NUM_ELEMENTS = 64;
  element_t *elements[NUM_ELEMENTS];
  for (int i = 0; i < NUM_ELEMENTS; i++)
    elements[i] = NULL;

  // Initial size=NUM_ELEMENTS, only one block will be created
  slab = slab_create (element_t, NUM_ELEMENTS);

  for (int i = 0; i < NUM_ELEMENTS; i++)
    {
      elements[i] = slab_get (element_t, slab);
      EXPECT_NE (elements[i], nullptr);
    }

  // Release all chunks
  for (int i = 0; i < NUM_ELEMENTS; i++)
    slab_put (slab, elements[i]);
}

TEST_F (SlabTest, SlabGetAndPutChunks)
{
  constexpr int NUM_ELEMENTS = 100;
  element_t *elements[NUM_ELEMENTS];
  for (int i = 0; i < NUM_ELEMENTS; i++)
    elements[i] = NULL;

  // Initial size=2 while NUM_ELEMENTS=100, to force creation of multiple
  // blocks
  slab = slab_create (sizeof (element_t), 2);

  for (int i = 0; i < NUM_ELEMENTS; i++)
    {
      elements[i] = slab_get (element_t, slab);
      EXPECT_NE (elements[i], nullptr);
    }

  // Release all chunks
  for (int i = 0; i < NUM_ELEMENTS; i++)
    slab_put (slab, elements[i]);
}

TEST_F (SlabTest, SlabGetAndPutSomeChunks)
{
  slab = slab_create (element_t, 2);

  constexpr int NUM_ELEMENTS = 100;
  element_t *elements[NUM_ELEMENTS];
  for (int i = 0; i < NUM_ELEMENTS; i++)
    elements[i] = NULL;

  // Get chunks...
  for (int i = 0; i < NUM_ELEMENTS; i++)
    {
      elements[i] = slab_get (element_t, slab);
      EXPECT_NE (elements[i], nullptr);

      // ...and return only some of them
      if (i % 5 == 0)
	slab_put (slab, elements[i]);
    }
}

TEST_F (SlabTest, SlabGetSameChunkTwice)
{
  slab = slab_create (element_t, 1);

  // Get chunk and update it before returning it
  element_t *e = slab_get (element_t, slab);
  ASSERT_NE (e, nullptr);
  element_t *prev = e;
  e->index = 2;
  e->val = 3;
  slab_put (slab, e);

  // Get a chunk again: it should return the previous one
  // without wiping its memory
  e = slab_get (element_t, slab);
  ASSERT_NE (e, nullptr);
  EXPECT_EQ (e, prev);
  EXPECT_EQ (e->index, 2);
  EXPECT_EQ (e->val, 3);

  // Try to get an additional chunk: it should return a new chunk
  // (different from previous one)
  e = slab_get (element_t, slab);
  EXPECT_NE (e, prev);
}