Use system-wide LevelDB instead of bundled one

1 files changed, 0 insertions, 384 deletions

diff --git a/src/leveldb/helpers/memenv/memenv.cc b/src/leveldb/helpers/memenv/memenv.cc
deleted file mode 100644
index 5879de121..000000000
--- a/src/leveldb/helpers/memenv/memenv.cc
+++ /dev/null
@@ -1,384 +0,0 @@
-// 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 "helpers/memenv/memenv.h"
-
-#include "leveldb/env.h"
-#include "leveldb/status.h"
-#include "port/port.h"
-#include "util/mutexlock.h"
-#include <map>
-#include <string.h>
-#include <string>
-#include <vector>
-
-namespace leveldb {
-
-namespace {
-
-class FileState {
- public:
-  // FileStates are reference counted. The initial reference count is zero
-  // and the caller must call Ref() at least once.
-  FileState() : refs_(0), size_(0) {}
-
-  // Increase the reference count.
-  void Ref() {
-    MutexLock lock(&refs_mutex_);
-    ++refs_;
-  }
-
-  // Decrease the reference count. Delete if this is the last reference.
-  void Unref() {
-    bool do_delete = false;
-
-    {
-      MutexLock lock(&refs_mutex_);
-      --refs_;
-      assert(refs_ >= 0);
-      if (refs_ <= 0) {
-        do_delete = true;
-      }
-    }
-
-    if (do_delete) {
-      delete this;
-    }
-  }
-
-  uint64_t Size() const { return size_; }
-
-  Status Read(uint64_t offset, size_t n, Slice* result, char* scratch) const {
-    if (offset > size_) {
-      return Status::IOError("Offset greater than file size.");
-    }
-    const uint64_t available = size_ - offset;
-    if (n > available) {
-      n = available;
-    }
-    if (n == 0) {
-      *result = Slice();
-      return Status::OK();
-    }
-
-    size_t block = offset / kBlockSize;
-    size_t block_offset = offset % kBlockSize;
-
-    if (n <= kBlockSize - block_offset) {
-      // The requested bytes are all in the first block.
-      *result = Slice(blocks_[block] + block_offset, n);
-      return Status::OK();
-    }
-
-    size_t bytes_to_copy = n;
-    char* dst = scratch;
-
-    while (bytes_to_copy > 0) {
-      size_t avail = kBlockSize - block_offset;
-      if (avail > bytes_to_copy) {
-        avail = bytes_to_copy;
-      }
-      memcpy(dst, blocks_[block] + block_offset, avail);
-
-      bytes_to_copy -= avail;
-      dst += avail;
-      block++;
-      block_offset = 0;
-    }
-
-    *result = Slice(scratch, n);
-    return Status::OK();
-  }
-
-  Status Append(const Slice& data) {
-    const char* src = data.data();
-    size_t src_len = data.size();
-
-    while (src_len > 0) {
-      size_t avail;
-      size_t offset = size_ % kBlockSize;
-
-      if (offset != 0) {
-        // There is some room in the last block.
-        avail = kBlockSize - offset;
-      } else {
-        // No room in the last block; push new one.
-        blocks_.push_back(new char[kBlockSize]);
-        avail = kBlockSize;
-      }
-
-      if (avail > src_len) {
-        avail = src_len;
-      }
-      memcpy(blocks_.back() + offset, src, avail);
-      src_len -= avail;
-      src += avail;
-      size_ += avail;
-    }
-
-    return Status::OK();
-  }
-
- private:
-  // Private since only Unref() should be used to delete it.
-  ~FileState() {
-    for (std::vector<char*>::iterator i = blocks_.begin(); i != blocks_.end();
-         ++i) {
-      delete [] *i;
-    }
-  }
-
-  // No copying allowed.
-  FileState(const FileState&);
-  void operator=(const FileState&);
-
-  port::Mutex refs_mutex_;
-  int refs_;  // Protected by refs_mutex_;
-
-  // The following fields are not protected by any mutex. They are only mutable
-  // while the file is being written, and concurrent access is not allowed
-  // to writable files.
-  std::vector<char*> blocks_;
-  uint64_t size_;
-
-  enum { kBlockSize = 8 * 1024 };
-};
-
-class SequentialFileImpl : public SequentialFile {
- public:
-  explicit SequentialFileImpl(FileState* file) : file_(file), pos_(0) {
-    file_->Ref();
-  }
-
-  ~SequentialFileImpl() {
-    file_->Unref();
-  }
-
-  virtual Status Read(size_t n, Slice* result, char* scratch) {
-    Status s = file_->Read(pos_, n, result, scratch);
-    if (s.ok()) {
-      pos_ += result->size();
-    }
-    return s;
-  }
-
-  virtual Status Skip(uint64_t n) {
-    if (pos_ > file_->Size()) {
-      return Status::IOError("pos_ > file_->Size()");
-    }
-    const size_t available = file_->Size() - pos_;
-    if (n > available) {
-      n = available;
-    }
-    pos_ += n;
-    return Status::OK();
-  }
-
- private:
-  FileState* file_;
-  size_t pos_;
-};
-
-class RandomAccessFileImpl : public RandomAccessFile {
- public:
-  explicit RandomAccessFileImpl(FileState* file) : file_(file) {
-    file_->Ref();
-  }
-
-  ~RandomAccessFileImpl() {
-    file_->Unref();
-  }
-
-  virtual Status Read(uint64_t offset, size_t n, Slice* result,
-                      char* scratch) const {
-    return file_->Read(offset, n, result, scratch);
-  }
-
- private:
-  FileState* file_;
-};
-
-class WritableFileImpl : public WritableFile {
- public:
-  WritableFileImpl(FileState* file) : file_(file) {
-    file_->Ref();
-  }
-
-  ~WritableFileImpl() {
-    file_->Unref();
-  }
-
-  virtual Status Append(const Slice& data) {
-    return file_->Append(data);
-  }
-
-  virtual Status Close() { return Status::OK(); }
-  virtual Status Flush() { return Status::OK(); }
-  virtual Status Sync() { return Status::OK(); }
-
- private:
-  FileState* file_;
-};
-
-class NoOpLogger : public Logger {
- public:
-  virtual void Logv(const char* format, va_list ap) { }
-};
-
-class InMemoryEnv : public EnvWrapper {
- public:
-  explicit InMemoryEnv(Env* base_env) : EnvWrapper(base_env) { }
-
-  virtual ~InMemoryEnv() {
-    for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end(); ++i){
-      i->second->Unref();
-    }
-  }
-
-  // Partial implementation of the Env interface.
-  virtual Status NewSequentialFile(const std::string& fname,
-                                   SequentialFile** result) {
-    MutexLock lock(&mutex_);
-    if (file_map_.find(fname) == file_map_.end()) {
-      *result = NULL;
-      return Status::IOError(fname, "File not found");
-    }
-
-    *result = new SequentialFileImpl(file_map_[fname]);
-    return Status::OK();
-  }
-
-  virtual Status NewRandomAccessFile(const std::string& fname,
-                                     RandomAccessFile** result) {
-    MutexLock lock(&mutex_);
-    if (file_map_.find(fname) == file_map_.end()) {
-      *result = NULL;
-      return Status::IOError(fname, "File not found");
-    }
-
-    *result = new RandomAccessFileImpl(file_map_[fname]);
-    return Status::OK();
-  }
-
-  virtual Status NewWritableFile(const std::string& fname,
-                                 WritableFile** result) {
-    MutexLock lock(&mutex_);
-    if (file_map_.find(fname) != file_map_.end()) {
-      DeleteFileInternal(fname);
-    }
-
-    FileState* file = new FileState();
-    file->Ref();
-    file_map_[fname] = file;
-
-    *result = new WritableFileImpl(file);
-    return Status::OK();
-  }
-
-  virtual bool FileExists(const std::string& fname) {
-    MutexLock lock(&mutex_);
-    return file_map_.find(fname) != file_map_.end();
-  }
-
-  virtual Status GetChildren(const std::string& dir,
-                             std::vector<std::string>* result) {
-    MutexLock lock(&mutex_);
-    result->clear();
-
-    for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end(); ++i){
-      const std::string& filename = i->first;
-
-      if (filename.size() >= dir.size() + 1 && filename[dir.size()] == '/' &&
-          Slice(filename).starts_with(Slice(dir))) {
-        result->push_back(filename.substr(dir.size() + 1));
-      }
-    }
-
-    return Status::OK();
-  }
-
-  void DeleteFileInternal(const std::string& fname) {
-    if (file_map_.find(fname) == file_map_.end()) {
-      return;
-    }
-
-    file_map_[fname]->Unref();
-    file_map_.erase(fname);
-  }
-
-  virtual Status DeleteFile(const std::string& fname) {
-    MutexLock lock(&mutex_);
-    if (file_map_.find(fname) == file_map_.end()) {
-      return Status::IOError(fname, "File not found");
-    }
-
-    DeleteFileInternal(fname);
-    return Status::OK();
-  }
-
-  virtual Status CreateDir(const std::string& dirname) {
-    return Status::OK();
-  }
-
-  virtual Status DeleteDir(const std::string& dirname) {
-    return Status::OK();
-  }
-
-  virtual Status GetFileSize(const std::string& fname, uint64_t* file_size) {
-    MutexLock lock(&mutex_);
-    if (file_map_.find(fname) == file_map_.end()) {
-      return Status::IOError(fname, "File not found");
-    }
-
-    *file_size = file_map_[fname]->Size();
-    return Status::OK();
-  }
-
-  virtual Status RenameFile(const std::string& src,
-                            const std::string& target) {
-    MutexLock lock(&mutex_);
-    if (file_map_.find(src) == file_map_.end()) {
-      return Status::IOError(src, "File not found");
-    }
-
-    DeleteFileInternal(target);
-    file_map_[target] = file_map_[src];
-    file_map_.erase(src);
-    return Status::OK();
-  }
-
-  virtual Status LockFile(const std::string& fname, FileLock** lock) {
-    *lock = new FileLock;
-    return Status::OK();
-  }
-
-  virtual Status UnlockFile(FileLock* lock) {
-    delete lock;
-    return Status::OK();
-  }
-
-  virtual Status GetTestDirectory(std::string* path) {
-    *path = "/test";
-    return Status::OK();
-  }
-
-  virtual Status NewLogger(const std::string& fname, Logger** result) {
-    *result = new NoOpLogger;
-    return Status::OK();
-  }
-
- private:
-  // Map from filenames to FileState objects, representing a simple file system.
-  typedef std::map<std::string, FileState*> FileSystem;
-  port::Mutex mutex_;
-  FileSystem file_map_;  // Protected by mutex_.
-};
-
-}  // namespace
-
-Env* NewMemEnv(Env* base_env) {
-  return new InMemoryEnv(base_env);
-}
-
-}  // namespace leveldb