提供基本的ttl测试用例
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// 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 "leveldb/env.h"
#include "port/port.h"
#include "util/testharness.h"
#include "util/env_posix_test_helper.h"
namespace leveldb {
static const int kDelayMicros = 100000;
static const int kReadOnlyFileLimit = 4;
static const int kMMapLimit = 4;
class EnvPosixTest {
private:
port::Mutex mu_;
std::string events_;
public:
Env* env_;
EnvPosixTest() : env_(Env::Default()) { }
static void SetFileLimits(int read_only_file_limit, int mmap_limit) {
EnvPosixTestHelper::SetReadOnlyFDLimit(read_only_file_limit);
EnvPosixTestHelper::SetReadOnlyMMapLimit(mmap_limit);
}
};
static void SetBool(void* ptr) {
reinterpret_cast<port::AtomicPointer*>(ptr)->NoBarrier_Store(ptr);
}
TEST(EnvPosixTest, RunImmediately) {
port::AtomicPointer called (NULL);
env_->Schedule(&SetBool, &called);
Env::Default()->SleepForMicroseconds(kDelayMicros);
ASSERT_TRUE(called.NoBarrier_Load() != NULL);
}
TEST(EnvPosixTest, RunMany) {
port::AtomicPointer last_id (NULL);
struct CB {
port::AtomicPointer* last_id_ptr; // Pointer to shared slot
uintptr_t id; // Order# for the execution of this callback
CB(port::AtomicPointer* p, int i) : last_id_ptr(p), id(i) { }
static void Run(void* v) {
CB* cb = reinterpret_cast<CB*>(v);
void* cur = cb->last_id_ptr->NoBarrier_Load();
ASSERT_EQ(cb->id-1, reinterpret_cast<uintptr_t>(cur));
cb->last_id_ptr->Release_Store(reinterpret_cast<void*>(cb->id));
}
};
// Schedule in different order than start time
CB cb1(&last_id, 1);
CB cb2(&last_id, 2);
CB cb3(&last_id, 3);
CB cb4(&last_id, 4);
env_->Schedule(&CB::Run, &cb1);
env_->Schedule(&CB::Run, &cb2);
env_->Schedule(&CB::Run, &cb3);
env_->Schedule(&CB::Run, &cb4);
Env::Default()->SleepForMicroseconds(kDelayMicros);
void* cur = last_id.Acquire_Load();
ASSERT_EQ(4, reinterpret_cast<uintptr_t>(cur));
}
struct State {
port::Mutex mu;
int val;
int num_running;
};
static void ThreadBody(void* arg) {
State* s = reinterpret_cast<State*>(arg);
s->mu.Lock();
s->val += 1;
s->num_running -= 1;
s->mu.Unlock();
}
TEST(EnvPosixTest, StartThread) {
State state;
state.val = 0;
state.num_running = 3;
for (int i = 0; i < 3; i++) {
env_->StartThread(&ThreadBody, &state);
}
while (true) {
state.mu.Lock();
int num = state.num_running;
state.mu.Unlock();
if (num == 0) {
break;
}
Env::Default()->SleepForMicroseconds(kDelayMicros);
}
ASSERT_EQ(state.val, 3);
}
TEST(EnvPosixTest, TestOpenOnRead) {
// Write some test data to a single file that will be opened |n| times.
std::string test_dir;
ASSERT_OK(Env::Default()->GetTestDirectory(&test_dir));
std::string test_file = test_dir + "/open_on_read.txt";
FILE* f = fopen(test_file.c_str(), "w");
ASSERT_TRUE(f != NULL);
const char kFileData[] = "abcdefghijklmnopqrstuvwxyz";
fputs(kFileData, f);
fclose(f);
// Open test file some number above the sum of the two limits to force
// open-on-read behavior of POSIX Env leveldb::RandomAccessFile.
const int kNumFiles = kReadOnlyFileLimit + kMMapLimit + 5;
leveldb::RandomAccessFile* files[kNumFiles] = {0};
for (int i = 0; i < kNumFiles; i++) {
ASSERT_OK(Env::Default()->NewRandomAccessFile(test_file, &files[i]));
}
char scratch;
Slice read_result;
for (int i = 0; i < kNumFiles; i++) {
ASSERT_OK(files[i]->Read(i, 1, &read_result, &scratch));
ASSERT_EQ(kFileData[i], read_result[0]);
}
for (int i = 0; i < kNumFiles; i++) {
delete files[i];
}
ASSERT_OK(Env::Default()->DeleteFile(test_file));
}
} // namespace leveldb
int main(int argc, char** argv) {
// All tests currently run with the same read-only file limits.
leveldb::EnvPosixTest::SetFileLimits(leveldb::kReadOnlyFileLimit,
leveldb::kMMapLimit);
return leveldb::test::RunAllTests();
}