Change namespace from leveldb to rocksdb

Summary:
Change namespace from leveldb to rocksdb. This allows a single
application to link in open-source leveldb code as well as
rocksdb code into the same process.

Test Plan: compile rocksdb

Reviewers: emayanke

Reviewed By: emayanke

CC: leveldb

Differential Revision: https://reviews.facebook.net/D13287

include/rocksdb/arena.h

@@ -11,7 +11,7 @@
 #include <limits>
 #include <memory>
 
-namespace leveldb {
+namespace rocksdb {
 
 class Arena {
  public:
@@ -36,6 +36,8 @@ class Arena {
   void operator=(const Arena&);
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_ARENA_H_

include/rocksdb/cache.h

@@ -22,7 +22,7 @@
 #include <stdint.h>
 #include "rocksdb/slice.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 using std::shared_ptr;
 
@@ -101,6 +101,8 @@ class Cache {
   void operator=(const Cache&);
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_UTIL_CACHE_H_

include/rocksdb/compaction_filter.h

@@ -7,7 +7,7 @@
 
 #include <string>
 
-namespace leveldb {
+namespace rocksdb {
 
 class Slice;
 
@@ -66,6 +66,8 @@ class DefaultCompactionFilterFactory : public CompactionFilterFactory {
     }
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_COMPACTION_FILTER_H_

include/rocksdb/comparator.h

@@ -7,7 +7,7 @@
 
 #include <string>
 
-namespace leveldb {
+namespace rocksdb {
 
 class Slice;
 
@@ -58,6 +58,8 @@ class Comparator {
 // must not be deleted.
 extern const Comparator* BytewiseComparator();
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_COMPARATOR_H_

include/rocksdb/db.h

@@ -14,7 +14,7 @@
 #include "rocksdb/types.h"
 #include "rocksdb/transaction_log.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 using std::unique_ptr;
 
@@ -306,6 +306,8 @@ Status DestroyDB(const std::string& name, const Options& options);
 // on a database that contains important information.
 Status RepairDB(const std::string& dbname, const Options& options);
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_DB_H_

include/rocksdb/env.h

@@ -20,7 +20,7 @@
 #include <stdint.h>
 #include "rocksdb/status.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class FileLock;
 class Logger;
@@ -563,6 +563,8 @@ class EnvWrapper : public Env {
   Env* target_;
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_ENV_H_

include/rocksdb/filter_policy.h

@@ -18,7 +18,7 @@
 
 #include <string>
 
-namespace leveldb {
+namespace rocksdb {
 
 class Slice;
 
@@ -66,5 +66,6 @@ class FilterPolicy {
 extern const FilterPolicy* NewBloomFilterPolicy(int bits_per_key);
 
 }
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_FILTER_POLICY_H_

include/rocksdb/iterator.h

@@ -18,7 +18,7 @@
 #include "rocksdb/slice.h"
 #include "rocksdb/status.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class Iterator {
  public:
@@ -97,6 +97,8 @@ extern Iterator* NewEmptyIterator();
 // Return an empty iterator with the specified status.
 extern Iterator* NewErrorIterator(const Status& status);
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_ITERATOR_H_

include/rocksdb/ldb_tool.h

@@ -3,12 +3,18 @@
 #define STORAGE_ROCKSDB_INCLUDE_LDB_TOOL_H
 #include "rocksdb/options.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class LDBTool {
  public:
   void Run(int argc, char** argv, Options = Options());
 };
 
-} // namespace leveldb
+namespace leveldb = rocksdb;
+
+
+} // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
+
 #endif // STORAGE_ROCKSDB_INCLUDE_LDB_TOOL_H

include/rocksdb/memtablerep.h

@@ -44,7 +44,7 @@
 #include "rocksdb/slice.h"
 #include "rocksdb/slice_transform.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class MemTableRep {
  public:
@@ -256,4 +256,6 @@ public:
 
 }
 
+#include "rocksdb/rocksdb_to_leveldb.h"
+
 #endif // STORAGE_ROCKSDB_DB_MEMTABLEREP_H_

include/rocksdb/merge_operator.h

@@ -9,7 +9,7 @@
 #include <deque>
 #include "rocksdb/slice.h"  // TODO: Remove this when migration is done;
 
-namespace leveldb {
+namespace rocksdb {
 
 class Slice;
 class Logger;
@@ -142,6 +142,8 @@ class AssociativeMergeOperator : public MergeOperator {
                             Logger* logger) const override;
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_MERGE_OPERATOR_H_

include/rocksdb/options.h

@@ -16,7 +16,7 @@
 #include "rocksdb/memtablerep.h"
 #include "rocksdb/slice_transform.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class Cache;
 class Comparator;
@@ -673,6 +673,8 @@ struct FlushOptions {
   }
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_OPTIONS_H_

include/rocksdb/perf_context.h

@@ -3,7 +3,7 @@
 
 #include <stdint.h>
 
-namespace leveldb {
+namespace rocksdb {
 
 enum PerfLevel {
   kDisable        = 0,  // disable perf stats
@@ -36,5 +36,6 @@ extern __thread PerfContext perf_context;
 
 }
 
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif

include/rocksdb/rocksdb_to_leveldb.h

@@ -0,0 +1,9 @@
+// Copyright (c) 2013 Facebook.
+
+#pragma once
+
+//
+// This is for backward compatibility with applications that use the
+// 'leveldb' namespace. This file will be deleted in a future release.
+//
+namespace leveldb = rocksdb;

include/rocksdb/slice.h

@@ -20,7 +20,7 @@
 #include <string.h>
 #include <string>
 
-namespace leveldb {
+namespace rocksdb {
 
 class Slice {
  public:
@@ -117,6 +117,8 @@ inline int Slice::compare(const Slice& b) const {
   return r;
 }
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_SLICE_H_

include/rocksdb/slice_transform.h

@@ -13,7 +13,7 @@
 
 #include <string>
 
-namespace leveldb {
+namespace rocksdb {
 
 class Slice;
 
@@ -40,4 +40,6 @@ extern const SliceTransform* NewNoopTransform();
 
 }
 
+#include "rocksdb/rocksdb_to_leveldb.h"
+
 #endif  // STORAGE_ROCKSDB_INCLUDE_SLICE_TRANSFORM_H_

include/rocksdb/statistics.h

@@ -13,7 +13,7 @@
 #include <memory>
 #include <vector>
 
-namespace leveldb {
+namespace rocksdb {
 
 /**
  * Keep adding ticker's here.
@@ -258,6 +258,8 @@ inline void SetTickerCount(std::shared_ptr<Statistics> statistics,
   }
 }
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_STATISTICS_H_

include/rocksdb/status.h

@@ -16,7 +16,7 @@
 #include <string>
 #include "rocksdb/slice.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class Status {
  public:
@@ -121,6 +121,8 @@ inline void Status::operator=(const Status& s) {
   }
 }
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_STATUS_H_

include/rocksdb/table_builder.h

@@ -17,7 +17,7 @@
 #include "rocksdb/options.h"
 #include "rocksdb/status.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class BlockBuilder;
 class BlockHandle;
@@ -90,6 +90,8 @@ class TableBuilder {
   void operator=(const TableBuilder&);
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_TABLE_BUILDER_H_

include/rocksdb/transaction_log.h

@@ -6,7 +6,7 @@
 #include "rocksdb/types.h"
 #include "rocksdb/write_batch.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class LogFile;
 typedef std::vector<std::unique_ptr<LogFile>> VectorLogPtr;
@@ -76,6 +76,8 @@ class TransactionLogIterator {
   // ONLY use if Valid() is true and status() is OK.
   virtual BatchResult GetBatch() = 0;
 };
-} //  namespace leveldb
+} //  namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_TRANSACTION_LOG_ITERATOR_H_

include/rocksdb/types.h

@@ -3,12 +3,15 @@
 
 #include <stdint.h>
 
-namespace leveldb {
+namespace rocksdb {
 
 // Define all public custom types here.
 
 // Represents a sequence number in a WAL file.
 typedef uint64_t SequenceNumber;
 
-}  //  namespace leveldb
+}  //  namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
+
 #endif //  STORAGE_ROCKSDB_INCLUDE_TYPES_H_

include/rocksdb/universal_compaction.h

@@ -14,7 +14,7 @@
 #include "rocksdb/slice.h"
 #include "rocksdb/statistics.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 //
 // Algorithm used to make a compaction request stop picking new files
@@ -65,6 +65,8 @@ class CompactionOptionsUniversal {
   }
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_UNIVERSAL_COMPACTION_OPTIONS_H

include/rocksdb/write_batch.h

@@ -24,7 +24,7 @@
 #include <string>
 #include "rocksdb/status.h"
 
-namespace leveldb {
+namespace rocksdb {
 
 class Slice;
 
@@ -94,6 +94,8 @@ class WriteBatch {
   // Intentionally copyable
 };
 
-}  // namespace leveldb
+}  // namespace rocksdb
+
+#include "rocksdb/rocksdb_to_leveldb.h"
 
 #endif  // STORAGE_ROCKSDB_INCLUDE_WRITE_BATCH_H_