You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.6 KiB
68 lines
1.6 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include "util/arena.h"
|
|
|
|
#include "util/random.h"
|
|
#include "util/testharness.h"
|
|
|
|
namespace leveldb {
|
|
|
|
class ArenaTest { };
|
|
|
|
TEST(ArenaTest, Empty) {
|
|
Arena arena;
|
|
}
|
|
|
|
TEST(ArenaTest, Simple) {
|
|
std::vector<std::pair<size_t, char*> > allocated;
|
|
Arena arena;
|
|
const int N = 100000;
|
|
size_t bytes = 0;
|
|
Random rnd(301);
|
|
for (int i = 0; i < N; i++) {
|
|
size_t s;
|
|
if (i % (N / 10) == 0) {
|
|
s = i;
|
|
} else {
|
|
s = rnd.OneIn(4000) ? rnd.Uniform(6000) :
|
|
(rnd.OneIn(10) ? rnd.Uniform(100) : rnd.Uniform(20));
|
|
}
|
|
if (s == 0) {
|
|
// Our arena disallows size 0 allocations.
|
|
s = 1;
|
|
}
|
|
char* r;
|
|
if (rnd.OneIn(10)) {
|
|
r = arena.AllocateAligned(s);
|
|
} else {
|
|
r = arena.Allocate(s);
|
|
}
|
|
|
|
for (size_t b = 0; b < s; b++) {
|
|
// Fill the "i"th allocation with a known bit pattern
|
|
r[b] = i % 256;
|
|
}
|
|
bytes += s;
|
|
allocated.push_back(std::make_pair(s, r));
|
|
ASSERT_GE(arena.MemoryUsage(), bytes);
|
|
if (i > N/10) {
|
|
ASSERT_LE(arena.MemoryUsage(), bytes * 1.10);
|
|
}
|
|
}
|
|
for (size_t i = 0; i < allocated.size(); i++) {
|
|
size_t num_bytes = allocated[i].first;
|
|
const char* p = allocated[i].second;
|
|
for (size_t b = 0; b < num_bytes; b++) {
|
|
// Check the "i"th allocation for the known bit pattern
|
|
ASSERT_EQ(int(p[b]) & 0xff, i % 256);
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace leveldb
|
|
|
|
int main(int argc, char** argv) {
|
|
return leveldb::test::RunAllTests();
|
|
}
|