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146 行
4.0 KiB
146 行
4.0 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "leveldb/env.h"
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#include "port/port.h"
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#include "util/testharness.h"
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#include "util/env_posix_test_helper.h"
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namespace leveldb {
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static const int kDelayMicros = 100000;
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static const int kReadOnlyFileLimit = 4;
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static const int kMMapLimit = 4;
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class EnvPosixTest {
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private:
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port::Mutex mu_;
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std::string events_;
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public:
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Env* env_;
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EnvPosixTest() : env_(Env::Default()) { }
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static void SetFileLimits(int read_only_file_limit, int mmap_limit) {
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EnvPosixTestHelper::SetReadOnlyFDLimit(read_only_file_limit);
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EnvPosixTestHelper::SetReadOnlyMMapLimit(mmap_limit);
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}
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};
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static void SetBool(void* ptr) {
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reinterpret_cast<port::AtomicPointer*>(ptr)->NoBarrier_Store(ptr);
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}
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TEST(EnvPosixTest, RunImmediately) {
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port::AtomicPointer called (NULL);
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env_->Schedule(&SetBool, &called);
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Env::Default()->SleepForMicroseconds(kDelayMicros);
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ASSERT_TRUE(called.NoBarrier_Load() != NULL);
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}
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TEST(EnvPosixTest, RunMany) {
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port::AtomicPointer last_id (NULL);
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struct CB {
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port::AtomicPointer* last_id_ptr; // Pointer to shared slot
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uintptr_t id; // Order# for the execution of this callback
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CB(port::AtomicPointer* p, int i) : last_id_ptr(p), id(i) { }
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static void Run(void* v) {
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CB* cb = reinterpret_cast<CB*>(v);
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void* cur = cb->last_id_ptr->NoBarrier_Load();
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ASSERT_EQ(cb->id-1, reinterpret_cast<uintptr_t>(cur));
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cb->last_id_ptr->Release_Store(reinterpret_cast<void*>(cb->id));
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}
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};
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// Schedule in different order than start time
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CB cb1(&last_id, 1);
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CB cb2(&last_id, 2);
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CB cb3(&last_id, 3);
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CB cb4(&last_id, 4);
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env_->Schedule(&CB::Run, &cb1);
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env_->Schedule(&CB::Run, &cb2);
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env_->Schedule(&CB::Run, &cb3);
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env_->Schedule(&CB::Run, &cb4);
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Env::Default()->SleepForMicroseconds(kDelayMicros);
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void* cur = last_id.Acquire_Load();
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ASSERT_EQ(4, reinterpret_cast<uintptr_t>(cur));
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}
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struct State {
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port::Mutex mu;
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int val;
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int num_running;
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};
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static void ThreadBody(void* arg) {
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State* s = reinterpret_cast<State*>(arg);
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s->mu.Lock();
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s->val += 1;
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s->num_running -= 1;
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s->mu.Unlock();
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}
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TEST(EnvPosixTest, StartThread) {
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State state;
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state.val = 0;
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state.num_running = 3;
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for (int i = 0; i < 3; i++) {
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env_->StartThread(&ThreadBody, &state);
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}
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while (true) {
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state.mu.Lock();
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int num = state.num_running;
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state.mu.Unlock();
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if (num == 0) {
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break;
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}
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Env::Default()->SleepForMicroseconds(kDelayMicros);
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}
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ASSERT_EQ(state.val, 3);
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}
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TEST(EnvPosixTest, TestOpenOnRead) {
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// Write some test data to a single file that will be opened |n| times.
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std::string test_dir;
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ASSERT_OK(Env::Default()->GetTestDirectory(&test_dir));
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std::string test_file = test_dir + "/open_on_read.txt";
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FILE* f = fopen(test_file.c_str(), "w");
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ASSERT_TRUE(f != NULL);
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const char kFileData[] = "abcdefghijklmnopqrstuvwxyz";
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fputs(kFileData, f);
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fclose(f);
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// Open test file some number above the sum of the two limits to force
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// open-on-read behavior of POSIX Env leveldb::RandomAccessFile.
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const int kNumFiles = kReadOnlyFileLimit + kMMapLimit + 5;
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leveldb::RandomAccessFile* files[kNumFiles] = {0};
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for (int i = 0; i < kNumFiles; i++) {
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ASSERT_OK(Env::Default()->NewRandomAccessFile(test_file, &files[i]));
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}
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char scratch;
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Slice read_result;
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for (int i = 0; i < kNumFiles; i++) {
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ASSERT_OK(files[i]->Read(i, 1, &read_result, &scratch));
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ASSERT_EQ(kFileData[i], read_result[0]);
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}
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for (int i = 0; i < kNumFiles; i++) {
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delete files[i];
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}
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ASSERT_OK(Env::Default()->DeleteFile(test_file));
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}
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} // namespace leveldb
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int main(int argc, char** argv) {
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// All tests currently run with the same read-only file limits.
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leveldb::EnvPosixTest::SetFileLimits(leveldb::kReadOnlyFileLimit,
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leveldb::kMMapLimit);
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return leveldb::test::RunAllTests();
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}
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