Support pragma once in all header files and cleanup some warnings (#4339)

Summary:
As you know, almost all compilers support "pragma once" keyword instead of using include guards. To be keep consistency between header files, all header files are edited.

Besides this, try to fix some warnings about loss of data.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4339

Differential Revision: D9654990

Pulled By: ajkr

fbshipit-source-id: c2cf3d2d03a599847684bed81378c401920ca848

db/c.cc

@@ -2402,7 +2402,7 @@ void rocksdb_options_set_bytes_per_sync(
 
 void rocksdb_options_set_writable_file_max_buffer_size(rocksdb_options_t* opt,
                                                        uint64_t v) {
-  opt->rep.writable_file_max_buffer_size = v;
+  opt->rep.writable_file_max_buffer_size = static_cast<size_t>(v);
 }
 
 void rocksdb_options_set_allow_concurrent_memtable_write(rocksdb_options_t* opt,

db/compaction_picker.cc

@@ -49,7 +49,7 @@ bool FindIntraL0Compaction(const std::vector<FileMetaData*>& level_files,
   // increasing.
   size_t new_compact_bytes_per_del_file = 0;
   for (span_len = 1; span_len < level_files.size(); ++span_len) {
-    compact_bytes += level_files[span_len]->fd.file_size;
+    compact_bytes += static_cast<size_t>(level_files[span_len]->fd.file_size);
     new_compact_bytes_per_del_file = compact_bytes / span_len;
     if (level_files[span_len]->being_compacted ||
         new_compact_bytes_per_del_file > compact_bytes_per_del_file) {

db/db_impl.cc

@@ -2413,7 +2413,7 @@ Status DBImpl::GetDbIdentity(std::string& identity) const {
   if (!s.ok()) {
     return s;
   }
-  char* buffer = reinterpret_cast<char*>(alloca(file_size));
+  char* buffer = reinterpret_cast<char*>(alloca(static_cast<size_t>(file_size)));
   Slice id;
   s = id_file_reader->Read(static_cast<size_t>(file_size), &id, buffer);
   if (!s.ok()) {

db/external_sst_file_ingestion_job.cc

@@ -344,7 +344,7 @@ Status ExternalSstFileIngestionJob::GetIngestedFileInfo(
       file_to_ingest->global_seqno_offset = 0;
       return Status::Corruption("Was not able to find file global seqno field");
     }
-    file_to_ingest->global_seqno_offset = offsets_iter->second;
+    file_to_ingest->global_seqno_offset = static_cast<size_t>(offsets_iter->second);
   } else if (file_to_ingest->version == 1) {
     // SST file V1 should not have global seqno field
     assert(seqno_iter == uprops.end());

db/merge_helper.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 //
-#ifndef MERGE_HELPER_H
-#define MERGE_HELPER_H
+#pragma once
 
 #include <deque>
 #include <string>
@@ -193,5 +192,3 @@ class MergeOutputIterator {
 };
 
 } // namespace rocksdb
-
-#endif

db/transaction_log_impl.cc

@@ -104,7 +104,7 @@ void TransactionLogIteratorImpl::SeekToStartSequence(
   if (files_->size() <= startFileIndex) {
     return;
   }
-  Status s = OpenLogReader(files_->at(startFileIndex).get());
+  Status s = OpenLogReader(files_->at(static_cast<size_t>(startFileIndex)).get());
   if (!s.ok()) {
     currentStatus_ = s;
     reporter_.Info(currentStatus_.ToString().c_str());

db/version_set.cc

@@ -895,13 +895,16 @@ void Version::GetColumnFamilyMetaData(ColumnFamilyMetaData* cf_meta) {
         assert(!ioptions->cf_paths.empty());
         file_path = ioptions->cf_paths.back().path;
       }
-      files.emplace_back(
-          MakeTableFileName("", file->fd.GetNumber()), file_path,
-          file->fd.GetFileSize(), file->fd.smallest_seqno,
-          file->fd.largest_seqno, file->smallest.user_key().ToString(),
+      files.emplace_back(SstFileMetaData{
+          MakeTableFileName("", file->fd.GetNumber()),
+          file_path,
+          static_cast<size_t>(file->fd.GetFileSize()),
+          file->fd.smallest_seqno,
+          file->fd.largest_seqno,
+          file->smallest.user_key().ToString(),
           file->largest.user_key().ToString(),
           file->stats.num_reads_sampled.load(std::memory_order_relaxed),
-          file->being_compacted);
+          file->being_compacted});
       level_size += file->fd.GetFileSize();
     }
     cf_meta->levels.emplace_back(
@@ -4338,7 +4341,7 @@ void VersionSet::GetLiveFilesMetaData(std::vector<LiveFileMetaData>* metadata) {
         }
         filemetadata.name = MakeTableFileName("", file->fd.GetNumber());
         filemetadata.level = level;
-        filemetadata.size = file->fd.GetFileSize();
+        filemetadata.size = static_cast<size_t>(file->fd.GetFileSize());
         filemetadata.smallestkey = file->smallest.user_key().ToString();
         filemetadata.largestkey = file->largest.user_key().ToString();
         filemetadata.smallest_seqno = file->fd.smallest_seqno;

db/wal_manager.cc

@@ -237,7 +237,7 @@ void WalManager::PurgeObsoleteWALFiles() {
   }
 
   size_t const files_keep_num =
-      db_options_.wal_size_limit_mb * 1024 * 1024 / log_file_size;
+      static_cast<size_t>(db_options_.wal_size_limit_mb * 1024 * 1024 / log_file_size);
   if (log_files_num <= files_keep_num) {
     return;
   }
@@ -352,7 +352,7 @@ Status WalManager::RetainProbableWalFiles(VectorLogPtr& all_logs,
   // Binary Search. avoid opening all files.
   while (end >= start) {
     int64_t mid = start + (end - start) / 2;  // Avoid overflow.
-    SequenceNumber current_seq_num = all_logs.at(mid)->StartSequence();
+    SequenceNumber current_seq_num = all_logs.at(static_cast<size_t>(mid))->StartSequence();
     if (current_seq_num == target) {
       end = mid;
       break;
@@ -363,7 +363,7 @@ Status WalManager::RetainProbableWalFiles(VectorLogPtr& all_logs,
     }
   }
   // end could be -ve.
-  size_t start_index = std::max(static_cast<int64_t>(0), end);
+  size_t start_index = static_cast<size_t>(std::max(static_cast<int64_t>(0), end));
   // The last wal file is always included
   all_logs.erase(all_logs.begin(), all_logs.begin() + start_index);
   return Status::OK();

env/mock_env.cc

@@ -201,7 +201,7 @@ class MockSequentialFile : public SequentialFile {
     if (n > available) {
       n = available;
     }
-    pos_ += n;
+    pos_ += static_cast<size_t>(n);
     return Status::OK();
   }
 

include/rocksdb/c.h

@@ -42,9 +42,6 @@
   (5) All of the pointer arguments must be non-NULL.
 */
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_C_H_
-#define STORAGE_ROCKSDB_INCLUDE_C_H_
-
 #pragma once
 
 #ifdef _WIN32
@@ -1678,5 +1675,3 @@ extern ROCKSDB_LIBRARY_API const char* rocksdb_pinnableslice_value(
 #ifdef __cplusplus
 }  /* end extern "C" */
 #endif
-
-#endif  /* STORAGE_ROCKSDB_INCLUDE_C_H_ */

include/rocksdb/cleanable.h

@@ -16,8 +16,7 @@
 // non-const method, all threads accessing the same Iterator must use
 // external synchronization.
 
-#ifndef INCLUDE_ROCKSDB_CLEANABLE_H_
-#define INCLUDE_ROCKSDB_CLEANABLE_H_
+#pragma once
 
 namespace rocksdb {
 
@@ -78,5 +77,3 @@ class Cleanable {
 };
 
 }  // namespace rocksdb
-
-#endif  // INCLUDE_ROCKSDB_CLEANABLE_H_

include/rocksdb/compaction_filter.h

@@ -6,8 +6,7 @@
 // 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.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_COMPACTION_FILTER_H_
-#define STORAGE_ROCKSDB_INCLUDE_COMPACTION_FILTER_H_
+#pragma once
 
 #include <cassert>
 #include <memory>
@@ -206,5 +205,3 @@ class CompactionFilterFactory {
 };
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_COMPACTION_FILTER_H_

include/rocksdb/comparator.h

@@ -6,8 +6,7 @@
 // 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.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_COMPARATOR_H_
-#define STORAGE_ROCKSDB_INCLUDE_COMPARATOR_H_
+#pragma once
 
 #include <string>
 
@@ -92,5 +91,3 @@ extern const Comparator* BytewiseComparator();
 extern const Comparator* ReverseBytewiseComparator();
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_COMPARATOR_H_

include/rocksdb/db.h

@@ -6,8 +6,7 @@
 // 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.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_DB_H_
-#define STORAGE_ROCKSDB_INCLUDE_DB_H_
+#pragma once
 
 #include <stdint.h>
 #include <stdio.h>
@@ -1221,5 +1220,3 @@ Status RepairDB(const std::string& dbname, const Options& options);
 #endif
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_DB_H_

include/rocksdb/env.h

@@ -14,8 +14,7 @@
 // All Env implementations are safe for concurrent access from
 // multiple threads without any external synchronization.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_ENV_H_
-#define STORAGE_ROCKSDB_INCLUDE_ENV_H_
+#pragma once
 
 #include <stdint.h>
 #include <cstdarg>
@@ -1267,5 +1266,3 @@ Status NewHdfsEnv(Env** hdfs_env, const std::string& fsname);
 Env* NewTimedEnv(Env* base_env);
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_ENV_H_

include/rocksdb/filter_policy.h

@@ -17,8 +17,7 @@
 // Most people will want to use the builtin bloom filter support (see
 // NewBloomFilterPolicy() below).
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_FILTER_POLICY_H_
-#define STORAGE_ROCKSDB_INCLUDE_FILTER_POLICY_H_
+#pragma once
 
 #include <memory>
 #include <stdexcept>
@@ -149,5 +148,3 @@ class FilterPolicy {
 extern const FilterPolicy* NewBloomFilterPolicy(int bits_per_key,
     bool use_block_based_builder = true);
 }
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_FILTER_POLICY_H_

include/rocksdb/iterator.h

@@ -16,8 +16,7 @@
 // non-const method, all threads accessing the same Iterator must use
 // external synchronization.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_ITERATOR_H_
-#define STORAGE_ROCKSDB_INCLUDE_ITERATOR_H_
+#pragma once
 
 #include <string>
 #include "rocksdb/cleanable.h"
@@ -119,5 +118,3 @@ extern Iterator* NewEmptyIterator();
 extern Iterator* NewErrorIterator(const Status& status);
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_ITERATOR_H_

include/rocksdb/merge_operator.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_MERGE_OPERATOR_H_
-#define STORAGE_ROCKSDB_INCLUDE_MERGE_OPERATOR_H_
+#pragma once
 
 #include <deque>
 #include <memory>
@@ -241,5 +240,3 @@ class AssociativeMergeOperator : public MergeOperator {
 };
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_MERGE_OPERATOR_H_

include/rocksdb/metadata.h

@@ -65,7 +65,7 @@ struct SstFileMetaData {
         num_reads_sampled(0),
         being_compacted(false) {}
   SstFileMetaData(const std::string& _file_name, const std::string& _path,
-                  uint64_t _size, SequenceNumber _smallest_seqno,
+                  size_t _size, SequenceNumber _smallest_seqno,
                   SequenceNumber _largest_seqno,
                   const std::string& _smallestkey,
                   const std::string& _largestkey, uint64_t _num_reads_sampled,
@@ -81,7 +81,7 @@ struct SstFileMetaData {
         being_compacted(_being_compacted) {}
 
   // File size in bytes.
-  uint64_t size;
+  size_t size;
   // The name of the file.
   std::string name;
   // The full path where the file locates.

include/rocksdb/options.h

@@ -6,8 +6,7 @@
 // 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.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_OPTIONS_H_
-#define STORAGE_ROCKSDB_INCLUDE_OPTIONS_H_
+#pragma once
 
 #include <stddef.h>
 #include <stdint.h>
@@ -1289,5 +1288,3 @@ struct IngestExternalFileOptions {
 struct TraceOptions {};
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_OPTIONS_H_

include/rocksdb/perf_context.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_PERF_CONTEXT_H
-#define STORAGE_ROCKSDB_INCLUDE_PERF_CONTEXT_H
+#pragma once
 
 #include <stdint.h>
 #include <string>
@@ -176,5 +175,3 @@ struct PerfContext {
 PerfContext* get_perf_context();
 
 }
-
-#endif

include/rocksdb/perf_level.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef INCLUDE_ROCKSDB_PERF_LEVEL_H_
-#define INCLUDE_ROCKSDB_PERF_LEVEL_H_
+#pragma once
 
 #include <stdint.h>
 #include <string>
@@ -29,5 +28,3 @@ void SetPerfLevel(PerfLevel level);
 PerfLevel GetPerfLevel();
 
 }  // namespace rocksdb
-
-#endif  // INCLUDE_ROCKSDB_PERF_LEVEL_H_

include/rocksdb/slice.h

@@ -16,8 +16,7 @@
 // non-const method, all threads accessing the same Slice must use
 // external synchronization.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_SLICE_H_
-#define STORAGE_ROCKSDB_INCLUDE_SLICE_H_
+#pragma once
 
 #include <assert.h>
 #include <cstdio>
@@ -257,5 +256,3 @@ inline size_t Slice::difference_offset(const Slice& b) const {
 }
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_SLICE_H_

include/rocksdb/slice_transform.h

@@ -12,8 +12,7 @@
 // define InDomain and InRange to determine which slices are in either
 // of these sets respectively.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_SLICE_TRANSFORM_H_
-#define STORAGE_ROCKSDB_INCLUDE_SLICE_TRANSFORM_H_
+#pragma once
 
 #include <string>
 
@@ -100,5 +99,3 @@ extern const SliceTransform* NewCappedPrefixTransform(size_t cap_len);
 extern const SliceTransform* NewNoopTransform();
 
 }
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_SLICE_TRANSFORM_H_

include/rocksdb/statistics.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_STATISTICS_H_
-#define STORAGE_ROCKSDB_INCLUDE_STATISTICS_H_
+#pragma once
 
 #include <atomic>
 #include <cstddef>
@@ -673,5 +672,3 @@ class Statistics {
 std::shared_ptr<Statistics> CreateDBStatistics();
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_STATISTICS_H_

include/rocksdb/status.h

@@ -14,8 +14,7 @@
 // non-const method, all threads accessing the same Status must use
 // external synchronization.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_STATUS_H_
-#define STORAGE_ROCKSDB_INCLUDE_STATUS_H_
+#pragma once
 
 #include <string>
 #include "rocksdb/slice.h"
@@ -348,5 +347,3 @@ inline bool Status::operator!=(const Status& rhs) const {
 }
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_STATUS_H_

include/rocksdb/table.h

@@ -16,6 +16,7 @@
 //   https://github.com/facebook/rocksdb/wiki/A-Tutorial-of-RocksDB-SST-formats#wiki-examples
 
 #pragma once
+
 #include <memory>
 #include <string>
 #include <unordered_map>

include/rocksdb/transaction_log.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_TRANSACTION_LOG_ITERATOR_H_
-#define STORAGE_ROCKSDB_INCLUDE_TRANSACTION_LOG_ITERATOR_H_
+#pragma once
 
 #include "rocksdb/status.h"
 #include "rocksdb/types.h"
@@ -121,5 +120,3 @@ class TransactionLogIterator {
   };
 };
 } //  namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_TRANSACTION_LOG_ITERATOR_H_

include/rocksdb/types.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_TYPES_H_
-#define STORAGE_ROCKSDB_INCLUDE_TYPES_H_
+#pragma once
 
 #include <stdint.h>
 #include "rocksdb/slice.h"
@@ -53,5 +52,3 @@ struct FullKey {
 bool ParseFullKey(const Slice& internal_key, FullKey* result);
 
 }  //  namespace rocksdb
-
-#endif //  STORAGE_ROCKSDB_INCLUDE_TYPES_H_

include/rocksdb/universal_compaction.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef STORAGE_ROCKSDB_UNIVERSAL_COMPACTION_OPTIONS_H
-#define STORAGE_ROCKSDB_UNIVERSAL_COMPACTION_OPTIONS_H
+#pragma once
 
 #include <stdint.h>
 #include <climits>
@@ -86,5 +85,3 @@ class CompactionOptionsUniversal {
 };
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_UNIVERSAL_COMPACTION_OPTIONS_H

include/rocksdb/utilities/env_librados.h

@@ -2,8 +2,8 @@
 //  This source code is licensed under both the GPLv2 (found in the
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
-#ifndef ROCKSDB_UTILITIES_ENV_LIBRADOS_H
-#define ROCKSDB_UTILITIES_ENV_LIBRADOS_H
+
+#pragma once
 
 #include <memory>
 #include <string>

include/rocksdb/wal_filter.h

@@ -4,6 +4,7 @@
 //  (found in the LICENSE.Apache file in the root directory).
 
 #pragma once
+
 #include <string>
 #include <map>
 

include/rocksdb/write_batch.h

@@ -22,8 +22,7 @@
 // non-const method, all threads accessing the same WriteBatch must use
 // external synchronization.
 
-#ifndef STORAGE_ROCKSDB_INCLUDE_WRITE_BATCH_H_
-#define STORAGE_ROCKSDB_INCLUDE_WRITE_BATCH_H_
+#pragma once
 
 #include <atomic>
 #include <stack>
@@ -367,5 +366,3 @@ class WriteBatch : public WriteBatchBase {
 };
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_ROCKSDB_INCLUDE_WRITE_BATCH_H_

monitoring/histogram_windowing.cc

@@ -17,7 +17,7 @@ namespace rocksdb {
 
 HistogramWindowingImpl::HistogramWindowingImpl() {
   env_ = Env::Default();
-  window_stats_.reset(new HistogramStat[num_windows_]);
+  window_stats_.reset(new HistogramStat[static_cast<size_t>(num_windows_)]);
   Clear();
 }
 
@@ -29,7 +29,7 @@ HistogramWindowingImpl::HistogramWindowingImpl(
       micros_per_window_(micros_per_window),
       min_num_per_window_(min_num_per_window) {
   env_ = Env::Default();
-  window_stats_.reset(new HistogramStat[num_windows_]);
+  window_stats_.reset(new HistogramStat[static_cast<size_t>(num_windows_)]);
   Clear();
 }
 

port/dirent.h

@@ -9,8 +9,7 @@
 //
 // See port_example.h for documentation for the following types/functions.
 
-#ifndef STORAGE_LEVELDB_PORT_DIRENT_H_
-#define STORAGE_LEVELDB_PORT_DIRENT_H_
+#pragma once
 
 #ifdef ROCKSDB_PLATFORM_POSIX
 #include <dirent.h>
@@ -43,5 +42,3 @@ using port::closedir;
 }  // namespace rocksdb
 
 #endif  // OS_WIN
-
-#endif  // STORAGE_LEVELDB_PORT_DIRENT_H_

port/likely.h

@@ -7,8 +7,7 @@
 // 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.
 
-#ifndef PORT_LIKELY_H_
-#define PORT_LIKELY_H_
+#pragma once
 
 #if defined(__GNUC__) && __GNUC__ >= 4
 #define LIKELY(x)   (__builtin_expect((x), 1))
@@ -17,5 +16,3 @@
 #define LIKELY(x)   (x)
 #define UNLIKELY(x) (x)
 #endif
-
-#endif  // PORT_LIKELY_H_

port/port_example.h

@@ -12,8 +12,7 @@
 // specific port_<platform>.h file.  Use this file as a reference for
 // how to port this package to a new platform.
 
-#ifndef STORAGE_LEVELDB_PORT_PORT_EXAMPLE_H_
-#define STORAGE_LEVELDB_PORT_PORT_EXAMPLE_H_
+#pragma once
 
 namespace rocksdb {
 namespace port {
@@ -100,5 +99,3 @@ extern bool Snappy_Uncompress(const char* input_data, size_t input_length,
 
 }  // namespace port
 }  // namespace rocksdb
-
-#endif  // STORAGE_LEVELDB_PORT_PORT_EXAMPLE_H_

port/sys_time.h

@@ -10,8 +10,7 @@
 // This file is a portable substitute for sys/time.h which does not exist on
 // Windows
 
-#ifndef STORAGE_LEVELDB_PORT_SYS_TIME_H_
-#define STORAGE_LEVELDB_PORT_SYS_TIME_H_
+#pragma once
 
 #if defined(OS_WIN) && defined(_MSC_VER)
 
@@ -44,5 +43,3 @@ using port::localtime_r;
 #include <time.h>
 #include <sys/time.h>
 #endif
-
-#endif  // STORAGE_LEVELDB_PORT_SYS_TIME_H_

port/util_logger.h

@@ -7,8 +7,7 @@
 // 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.
 
-#ifndef STORAGE_LEVELDB_PORT_UTIL_LOGGER_H_
-#define STORAGE_LEVELDB_PORT_UTIL_LOGGER_H_
+#pragma once
 
 // Include the appropriate platform specific file below.  If you are
 // porting to a new platform, see "port_example.h" for documentation
@@ -19,5 +18,3 @@
 #elif defined(OS_WIN)
 #include "port/win/win_logger.h"
 #endif
-
-#endif  // STORAGE_LEVELDB_PORT_UTIL_LOGGER_H_

port/win/env_win.cc

@@ -235,7 +235,7 @@ Status WinEnvIO::NewRandomAccessFile(const std::string& fname,
         MapViewOfFileEx(hMap, FILE_MAP_READ,
         0,  // High DWORD of access start
         0,  // Low DWORD
-        fileSize,
+        static_cast<SIZE_T>(fileSize),
         NULL);  // Let the OS choose the mapping
 
       if (!mapped_region) {
@@ -246,7 +246,7 @@ Status WinEnvIO::NewRandomAccessFile(const std::string& fname,
       }
 
       result->reset(new WinMmapReadableFile(fname, hFile, hMap, mapped_region,
-        fileSize));
+				static_cast<size_t>(fileSize)));
 
       mapGuard.release();
       fileGuard.release();
@@ -448,7 +448,7 @@ Status WinEnvIO::NewMemoryMappedFileBuffer(const std::string & fname,
   void* base = MapViewOfFileEx(hMap, FILE_MAP_WRITE,
     0,  // High DWORD of access start
     0,  // Low DWORD
-    fileSize,
+		static_cast<SIZE_T>(fileSize),
     NULL);  // Let the OS choose the mapping
 
   if (!base) {

port/win/io_win.cc

@@ -260,7 +260,7 @@ Status WinMmapReadableFile::Read(uint64_t offset, size_t n, Slice* result,
     *result = Slice();
     return IOError(filename_, EINVAL);
   } else if (offset + n > length_) {
-    n = length_ - offset;
+    n = length_ - static_cast<size_t>(offset);
   }
   *result =
     Slice(reinterpret_cast<const char*>(mapped_region_)+offset, n);
@@ -317,7 +317,7 @@ Status WinMmapFile::MapNewRegion() {
 
   assert(mapped_begin_ == nullptr);
 
-  size_t minDiskSize = file_offset_ + view_size_;
+  size_t minDiskSize = static_cast<size_t>(file_offset_) + view_size_;
 
   if (minDiskSize > reserved_size_) {
     status = Allocate(file_offset_, view_size_);
@@ -579,7 +579,7 @@ Status WinMmapFile::Allocate(uint64_t offset, uint64_t len) {
   // Make sure that we reserve an aligned amount of space
   // since the reservation block size is driven outside so we want
   // to check if we are ok with reservation here
-  size_t spaceToReserve = Roundup(offset + len, view_size_);
+  size_t spaceToReserve = Roundup(static_cast<size_t>(offset + len), view_size_);
   // Nothing to do
   if (spaceToReserve <= reserved_size_) {
     return status;
@@ -656,14 +656,14 @@ Status WinSequentialFile::PositionedRead(uint64_t offset, size_t n, Slice* resul
     return Status::NotSupported("This function is only used for direct_io");
   }
 
-  if (!IsSectorAligned(offset) ||
+  if (!IsSectorAligned(static_cast<size_t>(offset)) ||
       !IsSectorAligned(n)) {
       return Status::InvalidArgument(
         "WinSequentialFile::PositionedRead: offset is not properly aligned");
   }
 
   size_t bytes_read = 0; // out param
-  s = PositionedReadInternal(scratch, n, offset, bytes_read);
+  s = PositionedReadInternal(scratch, static_cast<size_t>(n), offset, bytes_read);
   *result = Slice(scratch, bytes_read);
   return s;
 }
@@ -721,7 +721,7 @@ Status WinRandomAccessImpl::ReadImpl(uint64_t offset, size_t n, Slice* result,
 
   // Check buffer alignment
   if (file_base_->use_direct_io()) {
-    if (!IsSectorAligned(offset) ||
+    if (!IsSectorAligned(static_cast<size_t>(offset)) ||
         !IsAligned(alignment_, scratch)) {
       return Status::InvalidArgument(
         "WinRandomAccessImpl::ReadImpl: offset or scratch is not properly aligned");
@@ -818,7 +818,7 @@ Status WinWritableImpl::AppendImpl(const Slice& data) {
     // to the end of the file
     assert(IsSectorAligned(next_write_offset_));
     if (!IsSectorAligned(data.size()) ||
-        !IsAligned(GetAlignement(), data.data())) {
+        !IsAligned(static_cast<size_t>(GetAlignement()), data.data())) {
       s = Status::InvalidArgument(
         "WriteData must be page aligned, size must be sector aligned");
     } else {
@@ -857,9 +857,9 @@ inline
 Status WinWritableImpl::PositionedAppendImpl(const Slice& data, uint64_t offset) {
 
   if(file_data_->use_direct_io()) {
-    if (!IsSectorAligned(offset) ||
+    if (!IsSectorAligned(static_cast<size_t>(offset)) ||
         !IsSectorAligned(data.size()) ||
-        !IsAligned(GetAlignement(), data.data())) {
+        !IsAligned(static_cast<size_t>(GetAlignement()), data.data())) {
       return Status::InvalidArgument(
         "Data and offset must be page aligned, size must be sector aligned");
     }
@@ -944,7 +944,7 @@ Status WinWritableImpl::AllocateImpl(uint64_t offset, uint64_t len) {
   // Make sure that we reserve an aligned amount of space
   // since the reservation block size is driven outside so we want
   // to check if we are ok with reservation here
-  size_t spaceToReserve = Roundup(offset + len, alignment_);
+  size_t spaceToReserve = Roundup(static_cast<size_t>(offset + len), static_cast<size_t>(alignment_));
   // Nothing to do
   if (spaceToReserve <= reservedsize_) {
     return status;
@@ -977,7 +977,7 @@ WinWritableFile::~WinWritableFile() {
 bool WinWritableFile::use_direct_io() const { return WinFileData::use_direct_io(); }
 
 size_t WinWritableFile::GetRequiredBufferAlignment() const {
-  return GetAlignement();
+  return static_cast<size_t>(GetAlignement());
 }
 
 Status WinWritableFile::Append(const Slice& data) {
@@ -1037,7 +1037,7 @@ WinRandomRWFile::WinRandomRWFile(const std::string& fname, HANDLE hFile,
 bool WinRandomRWFile::use_direct_io() const { return WinFileData::use_direct_io(); }
 
 size_t WinRandomRWFile::GetRequiredBufferAlignment() const {
-  return GetAlignement();
+  return static_cast<size_t>(GetAlignement());
 }
 
 Status WinRandomRWFile::Write(uint64_t offset, const Slice & data) {

port/win/port_win.h

@@ -9,8 +9,7 @@
 //
 // See port_example.h for documentation for the following types/functions.
 
-#ifndef STORAGE_LEVELDB_PORT_PORT_WIN_H_
-#define STORAGE_LEVELDB_PORT_PORT_WIN_H_
+#pragma once
 
 // Always want minimum headers
 #ifndef WIN32_LEAN_AND_MEAN
@@ -341,5 +340,3 @@ using port::pthread_getspecific;
 using port::truncate;
 
 }  // namespace rocksdb
-
-#endif  // STORAGE_LEVELDB_PORT_PORT_WIN_H_

table/block_based_table_reader.cc

@@ -1094,7 +1094,7 @@ Status BlockBasedTable::Open(const ImmutableCFOptions& ioptions,
     if (tail_prefetch_stats != nullptr) {
       assert(prefetch_buffer->min_offset_read() < file_size);
       tail_prefetch_stats->RecordEffectiveSize(
-          file_size - prefetch_buffer->min_offset_read());
+				static_cast<size_t>(file_size) - prefetch_buffer->min_offset_read());
     }
     *table_reader = std::move(new_table);
   }

table/cuckoo_table_builder.cc

@@ -164,9 +164,9 @@ bool CuckooTableBuilder::IsDeletedKey(uint64_t idx) const {
 Slice CuckooTableBuilder::GetKey(uint64_t idx) const {
   assert(closed_);
   if (IsDeletedKey(idx)) {
-    return Slice(&deleted_keys_[(idx - num_values_) * key_size_], key_size_);
+    return Slice(&deleted_keys_[static_cast<size_t>((idx - num_values_) * key_size_)], static_cast<size_t>(key_size_));
   }
-  return Slice(&kvs_[idx * (key_size_ + value_size_)], key_size_);
+  return Slice(&kvs_[static_cast<size_t>(idx * (key_size_ + value_size_))], static_cast<size_t>(key_size_));
 }
 
 Slice CuckooTableBuilder::GetUserKey(uint64_t idx) const {
@@ -177,14 +177,14 @@ Slice CuckooTableBuilder::GetUserKey(uint64_t idx) const {
 Slice CuckooTableBuilder::GetValue(uint64_t idx) const {
   assert(closed_);
   if (IsDeletedKey(idx)) {
-    static std::string empty_value(value_size_, 'a');
+    static std::string empty_value(static_cast<unsigned int>(value_size_), 'a');
     return Slice(empty_value);
   }
-  return Slice(&kvs_[idx * (key_size_ + value_size_) + key_size_], value_size_);
+  return Slice(&kvs_[static_cast<size_t>(idx * (key_size_ + value_size_) + key_size_)], static_cast<size_t>(value_size_));
 }
 
 Status CuckooTableBuilder::MakeHashTable(std::vector<CuckooBucket>* buckets) {
-  buckets->resize(hash_table_size_ + cuckoo_block_size_ - 1);
+  buckets->resize(static_cast<size_t>(hash_table_size_ + cuckoo_block_size_ - 1));
   uint32_t make_space_for_key_call_id = 0;
   for (uint32_t vector_idx = 0; vector_idx < num_entries_; vector_idx++) {
     uint64_t bucket_id = 0;
@@ -200,13 +200,13 @@ Status CuckooTableBuilder::MakeHashTable(std::vector<CuckooBucket>* buckets) {
       // stop searching and proceed for next hash function.
       for (uint32_t block_idx = 0; block_idx < cuckoo_block_size_;
           ++block_idx, ++hash_val) {
-        if ((*buckets)[hash_val].vector_idx == kMaxVectorIdx) {
+        if ((*buckets)[static_cast<size_t>(hash_val)].vector_idx == kMaxVectorIdx) {
           bucket_id = hash_val;
           bucket_found = true;
           break;
         } else {
           if (ucomp_->Compare(user_key,
-                GetUserKey((*buckets)[hash_val].vector_idx)) == 0) {
+                GetUserKey((*buckets)[static_cast<size_t>(hash_val)].vector_idx)) == 0) {
             return Status::NotSupported("Same key is being inserted again.");
           }
           hash_vals.push_back(hash_val);
@@ -226,7 +226,7 @@ Status CuckooTableBuilder::MakeHashTable(std::vector<CuckooBucket>* buckets) {
       ++num_hash_func_;
       for (uint32_t block_idx = 0; block_idx < cuckoo_block_size_;
           ++block_idx, ++hash_val) {
-        if ((*buckets)[hash_val].vector_idx == kMaxVectorIdx) {
+        if ((*buckets)[static_cast<size_t>(hash_val)].vector_idx == kMaxVectorIdx) {
           bucket_found = true;
           bucket_id = hash_val;
           break;
@@ -235,7 +235,7 @@ Status CuckooTableBuilder::MakeHashTable(std::vector<CuckooBucket>* buckets) {
         }
       }
     }
-    (*buckets)[bucket_id].vector_idx = vector_idx;
+    (*buckets)[static_cast<size_t>(bucket_id)].vector_idx = vector_idx;
   }
   return Status::OK();
 }
@@ -295,7 +295,7 @@ Status CuckooTableBuilder::Finish() {
         reinterpret_cast<const char*>(&value_size_), sizeof(value_size_));
 
   uint64_t bucket_size = key_size_ + value_size_;
-  unused_bucket.resize(bucket_size, 'a');
+  unused_bucket.resize(static_cast<size_t>(bucket_size), 'a');
   // Write the table.
   uint32_t num_added = 0;
   for (auto& bucket : buckets) {
@@ -320,7 +320,7 @@ Status CuckooTableBuilder::Finish() {
 
   uint64_t offset = buckets.size() * bucket_size;
   properties_.data_size = offset;
-  unused_bucket.resize(properties_.fixed_key_len);
+  unused_bucket.resize(static_cast<size_t>(properties_.fixed_key_len));
   properties_.user_collected_properties[
     CuckooTablePropertyNames::kEmptyKey] = unused_bucket;
   properties_.user_collected_properties[
@@ -456,7 +456,7 @@ bool CuckooTableBuilder::MakeSpaceForKey(
   // no. of times this will be called is <= max_num_hash_func_ + num_entries_.
   for (uint32_t hash_cnt = 0; hash_cnt < num_hash_func_; ++hash_cnt) {
     uint64_t bid = hash_vals[hash_cnt];
-    (*buckets)[bid].make_space_for_key_call_id = make_space_for_key_call_id;
+    (*buckets)[static_cast<size_t>(bid)].make_space_for_key_call_id = make_space_for_key_call_id;
     tree.push_back(CuckooNode(bid, 0, 0));
   }
   bool null_found = false;
@@ -467,7 +467,7 @@ bool CuckooTableBuilder::MakeSpaceForKey(
     if (curr_depth >= max_search_depth_) {
       break;
     }
-    CuckooBucket& curr_bucket = (*buckets)[curr_node.bucket_id];
+    CuckooBucket& curr_bucket = (*buckets)[static_cast<size_t>(curr_node.bucket_id)];
     for (uint32_t hash_cnt = 0;
         hash_cnt < num_hash_func_ && !null_found; ++hash_cnt) {
       uint64_t child_bucket_id = CuckooHash(GetUserKey(curr_bucket.vector_idx),
@@ -476,15 +476,15 @@ bool CuckooTableBuilder::MakeSpaceForKey(
       // Iterate inside Cuckoo Block.
       for (uint32_t block_idx = 0; block_idx < cuckoo_block_size_;
           ++block_idx, ++child_bucket_id) {
-        if ((*buckets)[child_bucket_id].make_space_for_key_call_id ==
+        if ((*buckets)[static_cast<size_t>(child_bucket_id)].make_space_for_key_call_id ==
             make_space_for_key_call_id) {
           continue;
         }
-        (*buckets)[child_bucket_id].make_space_for_key_call_id =
+        (*buckets)[static_cast<size_t>(child_bucket_id)].make_space_for_key_call_id =
           make_space_for_key_call_id;
         tree.push_back(CuckooNode(child_bucket_id, curr_depth + 1,
               curr_pos));
-        if ((*buckets)[child_bucket_id].vector_idx == kMaxVectorIdx) {
+        if ((*buckets)[static_cast<size_t>(child_bucket_id)].vector_idx == kMaxVectorIdx) {
           null_found = true;
           break;
         }
@@ -502,8 +502,8 @@ bool CuckooTableBuilder::MakeSpaceForKey(
     uint32_t bucket_to_replace_pos = static_cast<uint32_t>(tree.size()) - 1;
     while (bucket_to_replace_pos >= num_hash_func_) {
       CuckooNode& curr_node = tree[bucket_to_replace_pos];
-      (*buckets)[curr_node.bucket_id] =
-        (*buckets)[tree[curr_node.parent_pos].bucket_id];
+      (*buckets)[static_cast<size_t>(curr_node.bucket_id)] =
+        (*buckets)[static_cast<size_t>(tree[curr_node.parent_pos].bucket_id)];
       bucket_to_replace_pos = curr_node.parent_pos;
     }
     *bucket_id = tree[bucket_to_replace_pos].bucket_id;

table/cuckoo_table_reader.cc

@@ -136,7 +136,7 @@ CuckooTableReader::CuckooTableReader(
   cuckoo_block_size_ = *reinterpret_cast<const uint32_t*>(
       cuckoo_block_size->second.data());
   cuckoo_block_bytes_minus_one_ = cuckoo_block_size_ * bucket_length_ - 1;
-  status_ = file_->Read(0, file_size, &file_data_, nullptr);
+  status_ = file_->Read(0, static_cast<size_t>(file_size), &file_data_, nullptr);
 }
 
 Status CuckooTableReader::Get(const ReadOptions& /*readOptions*/,
@@ -268,7 +268,7 @@ void CuckooTableIterator::InitIfNeeded() {
   if (initialized_) {
     return;
   }
-  sorted_bucket_ids_.reserve(reader_->GetTableProperties()->num_entries);
+  sorted_bucket_ids_.reserve(static_cast<size_t>(reader_->GetTableProperties()->num_entries));
   uint64_t num_buckets = reader_->table_size_ + reader_->cuckoo_block_size_ - 1;
   assert(num_buckets < kInvalidIndex);
   const char* bucket = reader_->file_data_.data();

table/plain_table_reader.cc

@@ -277,7 +277,7 @@ void PlainTableReader::FillBloom(vector<uint32_t>* prefix_hashes) {
 Status PlainTableReader::MmapDataIfNeeded() {
   if (file_info_.is_mmap_mode) {
     // Get mmapped memory.
-    return file_info_.file->Read(0, file_size_, &file_info_.file_data, nullptr);
+    return file_info_.file->Read(0, static_cast<size_t>(file_size_), &file_info_.file_data, nullptr);
   }
   return Status::OK();
 }

third-party/fbson/FbsonDocument.h

@@ -55,8 +55,7 @@
  * @author Tian Xia <tianx@fb.com>
  */
 
-#ifndef FBSON_FBSONDOCUMENT_H
-#define FBSON_FBSONDOCUMENT_H
+#pragma once
 
 #include <stdlib.h>
 #include <string.h>
@@ -889,5 +888,3 @@ inline FbsonValue* FbsonValue::findPath(const char* key_path,
 #pragma pack(pop)
 
 } // namespace fbson
-
-#endif // FBSON_FBSONDOCUMENT_H

third-party/fbson/FbsonJsonParser.h

@@ -47,8 +47,7 @@
  * @author Tian Xia <tianx@fb.com>
  */
 
-#ifndef FBSON_FBSONPARSER_H
-#define FBSON_FBSONPARSER_H
+#pragma once
 
 #include <cmath>
 #include <limits>
@@ -741,5 +740,3 @@ class FbsonJsonParserT {
 typedef FbsonJsonParserT<FbsonOutStream> FbsonJsonParser;
 
 } // namespace fbson
-
-#endif // FBSON_FBSONPARSER_H

third-party/fbson/FbsonStream.h

@@ -18,8 +18,7 @@
  * @author Tian Xia <tianx@fb.com>
  */
 
-#ifndef FBSON_FBSONSTREAM_H
-#define FBSON_FBSONSTREAM_H
+#pragma once
 
 #ifndef __STDC_FORMAT_MACROS
 #define __STDC_FORMAT_MACROS
@@ -178,5 +177,3 @@ class FbsonOutStream : public std::ostream {
 };
 
 } // namespace fbson
-
-#endif // FBSON_FBSONSTREAM_H

third-party/fbson/FbsonUtil.h

@@ -9,8 +9,7 @@
  * @author Tian Xia <tianx@fb.com>
  */
 
-#ifndef FBSON_FBSONUTIL_H
-#define FBSON_FBSONUTIL_H
+#pragma once
 
 #include <sstream>
 #include "FbsonDocument.h"
@@ -159,5 +158,3 @@ class FbsonToJson {
 };
 
 } // namespace fbson
-
-#endif // FBSON_FBSONUTIL_H

third-party/fbson/FbsonWriter.h

@@ -25,8 +25,7 @@
  * @author Tian Xia <tianx@fb.com>
  */
 
-#ifndef FBSON_FBSONWRITER_H
-#define FBSON_FBSONWRITER_H
+#pragma once
 
 #include <stack>
 #include "FbsonDocument.h"
@@ -433,5 +432,3 @@ class FbsonWriterT {
 typedef FbsonWriterT<FbsonOutStream> FbsonWriter;
 
 } // namespace fbson
-
-#endif // FBSON_FBSONWRITER_H

util/channel.h

@@ -3,13 +3,13 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
+#pragma once
+
 #include <condition_variable>
 #include <mutex>
 #include <queue>
 #include <utility>
 
-#pragma once
-
 namespace rocksdb {
 
 template <class T>

util/crc32c_ppc.h

@@ -6,8 +6,7 @@
 //  This source code is also licensed under the GPLv2 license found in the
 //  COPYING file in the root directory of this source tree.
 
-#ifndef CRC32C_PPC_H
-#define CRC32C_PPC_H
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -19,5 +18,3 @@ extern uint32_t crc32c_ppc(uint32_t crc, unsigned char const *buffer,
 #ifdef __cplusplus
 }
 #endif
-
-#endif

util/crc32c_ppc_constants.h

@@ -5,8 +5,9 @@
 //  of patent rights can be found in the PATENTS file in the same directory.
 //  This source code is also licensed under the GPLv2 license found in the
 //  COPYING file in the root directory of this source tree.
-#ifndef CRC32C_PPC_CONST_H
-#define CRC32C_PPC_CONST_H
+
+#pragma once
+
 #define CRC 0x1edc6f41
 #define REFLECT
 #define CRC_XOR
@@ -898,5 +899,3 @@ static const unsigned int crc_table[] = {
         /* 33 bit reflected Barrett constant n */
         .octa 0x00000000000000000000000105ec76f1
 #endif
-
-#endif

util/fault_injection_test_env.h

@@ -11,8 +11,7 @@
 // the last "sync". It then checks for data loss errors by purposely dropping
 // file data (or entire files) not protected by a "sync".
 
-#ifndef UTIL_FAULT_INJECTION_TEST_ENV_H_
-#define UTIL_FAULT_INJECTION_TEST_ENV_H_
+#pragma once
 
 #include <map>
 #include <set>
@@ -171,5 +170,3 @@ class FaultInjectionTestEnv : public EnvWrapper {
 };
 
 }  // namespace rocksdb
-
-#endif  // UTIL_FAULT_INJECTION_TEST_ENV_H_

util/file_reader_writer.cc

@@ -62,7 +62,7 @@ Status SequentialFileReader::Read(size_t n, Slice* result, char* scratch) {
 Status SequentialFileReader::Skip(uint64_t n) {
 #ifndef ROCKSDB_LITE
   if (use_direct_io()) {
-    offset_ += n;
+    offset_ += static_cast<size_t>(n);
     return Status::OK();
   }
 #endif  // !ROCKSDB_LITE
@@ -81,9 +81,9 @@ Status RandomAccessFileReader::Read(uint64_t offset, size_t n, Slice* result,
     if (use_direct_io()) {
 #ifndef ROCKSDB_LITE
       size_t alignment = file_->GetRequiredBufferAlignment();
-      size_t aligned_offset = TruncateToPageBoundary(alignment, offset);
-      size_t offset_advance = offset - aligned_offset;
-      size_t read_size = Roundup(offset + n, alignment) - aligned_offset;
+      size_t aligned_offset = TruncateToPageBoundary(alignment, static_cast<size_t>(offset));
+      size_t offset_advance = static_cast<size_t>(offset) - aligned_offset;
+      size_t read_size = Roundup(static_cast<size_t>(offset + n), alignment) - aligned_offset;
       AlignedBuffer buf;
       buf.Alignment(alignment);
       buf.AllocateNewBuffer(read_size);
@@ -673,7 +673,7 @@ Status FilePrefetchBuffer::Prefetch(RandomAccessFileReader* reader,
       // Only a few requested bytes are in the buffer. memmove those chunk of
       // bytes to the beginning, and memcpy them back into the new buffer if a
       // new buffer is created.
-      chunk_offset_in_buffer = Rounddown(offset - buffer_offset_, alignment);
+      chunk_offset_in_buffer = Rounddown(static_cast<size_t>(offset - buffer_offset_), alignment);
       chunk_len = buffer_.CurrentSize() - chunk_offset_in_buffer;
       assert(chunk_offset_in_buffer % alignment == 0);
       assert(chunk_len % alignment == 0);
@@ -694,11 +694,11 @@ Status FilePrefetchBuffer::Prefetch(RandomAccessFileReader* reader,
     buffer_.Alignment(alignment);
     buffer_.AllocateNewBuffer(static_cast<size_t>(roundup_len),
                               copy_data_to_new_buffer, chunk_offset_in_buffer,
-                              chunk_len);
+                              static_cast<size_t>(chunk_len));
   } else if (chunk_len > 0) {
     // New buffer not needed. But memmove bytes from tail to the beginning since
     // chunk_len is greater than 0.
-    buffer_.RefitTail(chunk_offset_in_buffer, chunk_len);
+    buffer_.RefitTail(static_cast<size_t>(chunk_offset_in_buffer), static_cast<size_t>(chunk_len));
   }
 
   Slice result;
@@ -707,7 +707,7 @@ Status FilePrefetchBuffer::Prefetch(RandomAccessFileReader* reader,
                    buffer_.BufferStart() + chunk_len);
   if (s.ok()) {
     buffer_offset_ = rounddown_offset;
-    buffer_.Size(chunk_len + result.size());
+    buffer_.Size(static_cast<size_t>(chunk_len) + result.size());
   }
   return s;
 }
@@ -715,7 +715,7 @@ Status FilePrefetchBuffer::Prefetch(RandomAccessFileReader* reader,
 bool FilePrefetchBuffer::TryReadFromCache(uint64_t offset, size_t n,
                                           Slice* result) {
   if (track_min_offset_ && offset < min_offset_read_) {
-    min_offset_read_ = offset;
+    min_offset_read_ = static_cast<size_t>(offset);
   }
   if (!enable_ || offset < buffer_offset_) {
     return false;

util/ppc-opcode.h

@@ -6,8 +6,7 @@
 //  This source code is also licensed under the GPLv2 license found in the
 //  COPYING file in the root directory of this source tree.
 
-#ifndef __OPCODES_H
-#define __OPCODES_H
+#pragma once
 
 #define __PPC_RA(a) (((a)&0x1f) << 16)
 #define __PPC_RB(b) (((b)&0x1f) << 11)
@@ -27,5 +26,3 @@
 #define VPMSUMD(t, a, b) .long PPC_INST_VPMSUMD | VSX_XX3((t), a, b)
 #define MFVRD(a, t) .long PPC_INST_MFVSRD | VSX_XX1((t) + 32, a, 0)
 #define MTVRD(t, a) .long PPC_INST_MTVSRD | VSX_XX1((t) + 32, a, 0)
-
-#endif

util/testutil.h

@@ -250,7 +250,7 @@ class RandomRWStringSink : public RandomRWFile {
 
   Status Write(uint64_t offset, const Slice& data) override {
     if (offset + data.size() > ss_->contents_.size()) {
-      ss_->contents_.resize(offset + data.size(), '\0');
+      ss_->contents_.resize(static_cast<size_t>(offset) + data.size(), '\0');
     }
 
     char* pos = const_cast<char*>(ss_->contents_.data() + offset);
@@ -518,7 +518,7 @@ class StringEnv : public EnvWrapper {
             "Attemp to read when it already reached eof.");
       }
       // TODO(yhchiang): Currently doesn't handle the overflow case.
-      offset_ += n;
+      offset_ += static_cast<size_t>(n);
       return Status::OK();
     }
 
@@ -532,7 +532,7 @@ class StringEnv : public EnvWrapper {
     explicit StringSink(std::string* contents)
         : WritableFile(), contents_(contents) {}
     virtual Status Truncate(uint64_t size) override {
-      contents_->resize(size);
+      contents_->resize(static_cast<size_t>(size));
       return Status::OK();
     }
     virtual Status Close() override { return Status::OK(); }

util/transaction_test_util.cc

@@ -137,6 +137,7 @@ bool RandomTransactionInserter::DoInsert(DB* db, Transaction* txn,
   std::iota(set_vec.begin(), set_vec.end(), static_cast<uint16_t>(0));
   std::random_shuffle(set_vec.begin(), set_vec.end(),
                       [&](uint64_t r) { return rand_->Uniform(r); });
+
   // For each set, pick a key at random and increment it
   for (uint16_t set_i : set_vec) {
     uint64_t int_value = 0;

utilities/backupable/backupable_db.cc

@@ -781,7 +781,7 @@ Status BackupEngineImpl::CreateNewBackupWithMetadata(
 
   RateLimiter* rate_limiter = options_.backup_rate_limiter.get();
   if (rate_limiter) {
-    copy_file_buffer_size_ = rate_limiter->GetSingleBurstBytes();
+    copy_file_buffer_size_ = static_cast<size_t>(rate_limiter->GetSingleBurstBytes());
   }
 
   // A set into which we will insert the dst_paths that are calculated for live
@@ -1078,7 +1078,7 @@ Status BackupEngineImpl::RestoreDBFromBackup(
 
   RateLimiter* rate_limiter = options_.restore_rate_limiter.get();
   if (rate_limiter) {
-    copy_file_buffer_size_ = rate_limiter->GetSingleBurstBytes();
+    copy_file_buffer_size_ = static_cast<size_t>(rate_limiter->GetSingleBurstBytes());
   }
   Status s;
   std::vector<RestoreAfterCopyOrCreateWorkItem> restore_items_to_finish;
@@ -1231,7 +1231,7 @@ Status BackupEngineImpl::CopyOrCreateFile(
     if (!src.empty()) {
       size_t buffer_to_read = (copy_file_buffer_size_ < size_limit)
                                   ? copy_file_buffer_size_
-                                  : size_limit;
+                                  : static_cast<size_t>(size_limit);
       s = src_reader->Read(buffer_to_read, &data, buf.get());
       processed_buffer_size += buffer_to_read;
     } else {
@@ -1426,7 +1426,7 @@ Status BackupEngineImpl::CalculateChecksum(const std::string& src, Env* src_env,
       return Status::Incomplete("Backup stopped");
     }
     size_t buffer_to_read = (copy_file_buffer_size_ < size_limit) ?
-      copy_file_buffer_size_ : size_limit;
+      copy_file_buffer_size_ : static_cast<size_t>(size_limit);
     s = src_reader->Read(buffer_to_read, &data, buf.get());
 
     if (!s.ok()) {

utilities/blob_db/blob_db_impl.cc

@@ -1008,14 +1008,14 @@ Status BlobDBImpl::GetBlobValue(const Slice& key, const Slice& index_entry,
   uint64_t record_size = sizeof(uint32_t) + key.size() + blob_index.size();
 
   // Allocate the buffer. This is safe in C++11
-  std::string buffer_str(record_size, static_cast<char>(0));
+  std::string buffer_str(static_cast<size_t>(record_size), static_cast<char>(0));
   char* buffer = &buffer_str[0];
 
   // A partial blob record contain checksum, key and value.
   Slice blob_record;
   {
     StopWatch read_sw(env_, statistics_, BLOB_DB_BLOB_FILE_READ_MICROS);
-    s = reader->Read(record_offset, record_size, &blob_record, buffer);
+    s = reader->Read(record_offset, static_cast<size_t>(record_size), &blob_record, buffer);
     RecordTick(statistics_, BLOB_DB_BLOB_FILE_BYTES_READ, blob_record.size());
   }
   if (!s.ok()) {
@@ -1041,7 +1041,7 @@ Status BlobDBImpl::GetBlobValue(const Slice& key, const Slice& index_entry,
   }
   Slice crc_slice(blob_record.data(), sizeof(uint32_t));
   Slice blob_value(blob_record.data() + sizeof(uint32_t) + key.size(),
-                   blob_index.size());
+                   static_cast<size_t>(blob_index.size()));
   uint32_t crc_exp;
   if (!GetFixed32(&crc_slice, &crc_exp)) {
     ROCKS_LOG_DEBUG(db_options_.info_log,

utilities/blob_db/blob_db_impl_filesnapshot.cc

@@ -93,7 +93,7 @@ void BlobDBImpl::GetLiveFilesMetaData(std::vector<LiveFileMetaData>* metadata) {
   for (auto bfile_pair : blob_files_) {
     auto blob_file = bfile_pair.second;
     LiveFileMetaData filemetadata;
-    filemetadata.size = blob_file->GetFileSize();
+    filemetadata.size = static_cast<size_t>(blob_file->GetFileSize());
     // Path should be relative to db_name, but begin with slash.
     filemetadata.name =
         BlobFileName("", bdb_options_.blob_dir, blob_file->BlobFileNumber());

utilities/blob_db/blob_dump_tool.cc

@@ -199,7 +199,7 @@ Status BlobDumpTool::DumpRecord(DisplayType show_key, DisplayType show_blob,
     fprintf(stdout, "  expiration : %" PRIu64 "\n", record.expiration);
   }
   *offset += BlobLogRecord::kHeaderSize;
-  s = Read(*offset, key_size + value_size, &slice);
+  s = Read(*offset, static_cast<size_t>(key_size + value_size), &slice);
   if (!s.ok()) {
     return s;
   }
@@ -212,7 +212,7 @@ Status BlobDumpTool::DumpRecord(DisplayType show_key, DisplayType show_blob,
     UncompressionInfo info(context, CompressionDict::GetEmptyDict(),
                            compression);
     s = UncompressBlockContentsForCompressionType(
-        info, slice.data() + key_size, value_size, &contents,
+        info, slice.data() + key_size, static_cast<size_t>(value_size), &contents,
         2 /*compress_format_version*/, ImmutableCFOptions(Options()));
     if (!s.ok()) {
       return s;
@@ -221,10 +221,10 @@ Status BlobDumpTool::DumpRecord(DisplayType show_key, DisplayType show_blob,
   }
   if (show_key != DisplayType::kNone) {
     fprintf(stdout, "  key        : ");
-    DumpSlice(Slice(slice.data(), key_size), show_key);
+    DumpSlice(Slice(slice.data(), static_cast<size_t>(key_size)), show_key);
     if (show_blob != DisplayType::kNone) {
       fprintf(stdout, "  blob       : ");
-      DumpSlice(Slice(slice.data() + key_size, value_size), show_blob);
+      DumpSlice(Slice(slice.data() + static_cast<size_t>(key_size), static_cast<size_t>(value_size)), show_blob);
     }
     if (show_uncompressed_blob != DisplayType::kNone) {
       fprintf(stdout, "  raw blob   : ");

utilities/blob_db/blob_log_reader.cc

@@ -26,8 +26,8 @@ Reader::Reader(unique_ptr<RandomAccessFileReader>&& file_reader, Env* env,
 
 Status Reader::ReadSlice(uint64_t size, Slice* slice, std::string* buf) {
   StopWatch read_sw(env_, statistics_, BLOB_DB_BLOB_FILE_READ_MICROS);
-  buf->reserve(size);
-  Status s = file_->Read(next_byte_, size, slice, &(*buf)[0]);
+  buf->reserve(static_cast<size_t>(size));
+  Status s = file_->Read(next_byte_, static_cast<size_t>(size), slice, &(*buf)[0]);
   next_byte_ += size;
   if (!s.ok()) {
     return s;

utilities/col_buf_decoder.cc

@@ -147,7 +147,7 @@ size_t FixedLengthColBufDecoder::Decode(const char* src, char** dest) {
              col_compression_type_ == kColDict) {
     uint64_t dict_val = read_val;
     assert(dict_val < dict_vec_.size());
-    write_val = dict_vec_[dict_val];
+    write_val = dict_vec_[static_cast<size_t>(dict_val)];
   }
 
   // dest->append(reinterpret_cast<char*>(&write_val), size_);
@@ -222,7 +222,7 @@ size_t VariableChunkColBufDecoder::Decode(const char* src, char** dest) {
       uint64_t dict_val;
       ReadVarint64(&src, &dict_val);
       assert(dict_val < dict_vec_.size());
-      chunk_buf = dict_vec_[dict_val];
+      chunk_buf = dict_vec_[static_cast<size_t>(dict_val)];
     } else {
       memcpy(&chunk_buf, src, chunk_size);
       src += chunk_size;

utilities/column_aware_encoding_util.cc

@@ -101,7 +101,7 @@ void ColumnAwareEncodingReader::DecodeBlocks(
 
     size_t num_kv_pairs;
     const char* header_content_ptr = content_ptr;
-    num_kv_pairs = DecodeFixed64(header_content_ptr);
+    num_kv_pairs = static_cast<size_t>(DecodeFixed64(header_content_ptr));
 
     header_content_ptr += sizeof(size_t);
     size_t num_key_columns = key_col_bufs.size();
@@ -119,7 +119,7 @@ void ColumnAwareEncodingReader::DecodeBlocks(
       key_content_ptr[i] = col_content_ptr;
       key_content_ptr[i] += key_col_bufs[i]->Init(key_content_ptr[i]);
       size_t offset;
-      offset = DecodeFixed64(header_content_ptr);
+      offset = static_cast<size_t>(DecodeFixed64(header_content_ptr));
       header_content_ptr += sizeof(size_t);
       col_content_ptr += offset;
     }
@@ -127,7 +127,7 @@ void ColumnAwareEncodingReader::DecodeBlocks(
       value_content_ptr[i] = col_content_ptr;
       value_content_ptr[i] += value_col_bufs[i]->Init(value_content_ptr[i]);
       size_t offset;
-      offset = DecodeFixed64(header_content_ptr);
+      offset = static_cast<size_t>(DecodeFixed64(header_content_ptr));
       header_content_ptr += sizeof(size_t);
       col_content_ptr += offset;
     }

utilities/document/document_db.cc

@@ -1155,10 +1155,10 @@ Options GetRocksDBOptionsFromOptions(const DocumentDBOptions& options) {
   Options rocksdb_options;
   rocksdb_options.max_background_compactions = options.background_threads - 1;
   rocksdb_options.max_background_flushes = 1;
-  rocksdb_options.write_buffer_size = options.memtable_size;
+  rocksdb_options.write_buffer_size = static_cast<size_t>(options.memtable_size);
   rocksdb_options.max_write_buffer_number = 6;
   BlockBasedTableOptions table_options;
-  table_options.block_cache = NewLRUCache(options.cache_size);
+  table_options.block_cache = NewLRUCache(static_cast<size_t>(options.cache_size));
   rocksdb_options.table_factory.reset(NewBlockBasedTableFactory(table_options));
   return rocksdb_options;
 }

utilities/merge_operators/bytesxor.h

@@ -3,8 +3,7 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
-#ifndef UTILITIES_MERGE_OPERATORS_BYTESXOR_H_
-#define UTILITIES_MERGE_OPERATORS_BYTESXOR_H_
+#pragma once
 
 #include <algorithm>
 #include <memory>
@@ -38,5 +37,3 @@ class BytesXOROperator : public AssociativeMergeOperator {
 };
 
 }  // namespace rocksdb
-
-#endif  // UTILITIES_MERGE_OPERATORS_BYTESXOR_H_

utilities/persistent_cache/block_cache_tier.h

@@ -44,9 +44,9 @@ class BlockCacheTier : public PersistentCacheTier {
  public:
   explicit BlockCacheTier(const PersistentCacheConfig& opt)
       : opt_(opt),
-        insert_ops_(opt_.max_write_pipeline_backlog_size),
+        insert_ops_(static_cast<size_t>(opt_.max_write_pipeline_backlog_size)),
         buffer_allocator_(opt.write_buffer_size, opt.write_buffer_count()),
-        writer_(this, opt_.writer_qdepth, opt_.writer_dispatch_size) {
+        writer_(this, opt_.writer_qdepth, static_cast<size_t>(opt_.writer_dispatch_size)) {
     Info(opt_.log, "Initializing allocator. size=%d B count=%d",
          opt_.write_buffer_size, opt_.write_buffer_count());
   }

utilities/spatialdb/spatial_db.cc

@@ -354,8 +354,8 @@ class SpatialIndexCursor : public Cursor {
       : value_getter_(value_getter), valid_(true) {
     // calculate quad keys we'll need to query
     std::vector<uint64_t> quad_keys;
-    quad_keys.reserve((tile_bbox.max_x - tile_bbox.min_x + 1) *
-                      (tile_bbox.max_y - tile_bbox.min_y + 1));
+    quad_keys.reserve(static_cast<size_t>((tile_bbox.max_x - tile_bbox.min_x + 1) *
+                      (tile_bbox.max_y - tile_bbox.min_y + 1)));
     for (uint64_t x = tile_bbox.min_x; x <= tile_bbox.max_x; ++x) {
       for (uint64_t y = tile_bbox.min_y; y <= tile_bbox.max_y; ++y) {
         quad_keys.push_back(GetQuadKeyFromTile(x, y, tile_bits));
@@ -791,7 +791,7 @@ Status SpatialDB::Create(
   db_options.create_missing_column_families = true;
   db_options.error_if_exists = true;
 
-  auto block_cache = NewLRUCache(options.cache_size);
+  auto block_cache = NewLRUCache(static_cast<size_t>(options.cache_size));
   ColumnFamilyOptions column_family_options =
       GetColumnFamilyOptions(options, block_cache);
 
@@ -832,7 +832,7 @@ Status SpatialDB::Create(
 Status SpatialDB::Open(const SpatialDBOptions& options, const std::string& name,
                        SpatialDB** db, bool read_only) {
   DBOptions db_options = GetDBOptionsFromSpatialDBOptions(options);
-  auto block_cache = NewLRUCache(options.cache_size);
+  auto block_cache = NewLRUCache(static_cast<size_t>(options.cache_size));
   ColumnFamilyOptions column_family_options =
       GetColumnFamilyOptions(options, block_cache);
 

utilities/transactions/transaction_lock_mgr.cc

@@ -446,8 +446,8 @@ bool TransactionLockMgr::IncrementWaiters(
     const autovector<TransactionID>& wait_ids, const std::string& key,
     const uint32_t& cf_id, const bool& exclusive, Env* const env) {
   auto id = txn->GetID();
-  std::vector<int> queue_parents(txn->GetDeadlockDetectDepth());
-  std::vector<TransactionID> queue_values(txn->GetDeadlockDetectDepth());
+  std::vector<int> queue_parents(static_cast<size_t>(txn->GetDeadlockDetectDepth()));
+  std::vector<TransactionID> queue_values(static_cast<size_t>(txn->GetDeadlockDetectDepth()));
   std::lock_guard<std::mutex> lock(wait_txn_map_mutex_);
   assert(!wait_txn_map_.Contains(id));
 

utilities/transactions/write_prepared_txn_db.cc

@@ -460,7 +460,7 @@ void WritePreparedTxnDB::RemovePrepared(const uint64_t prepare_seq,
 bool WritePreparedTxnDB::GetCommitEntry(const uint64_t indexed_seq,
                                         CommitEntry64b* entry_64b,
                                         CommitEntry* entry) const {
-  *entry_64b = commit_cache_[indexed_seq].load(std::memory_order_acquire);
+  *entry_64b = commit_cache_[static_cast<size_t>(indexed_seq)].load(std::memory_order_acquire);
   bool valid = entry_64b->Parse(indexed_seq, entry, FORMAT);
   return valid;
 }
@@ -469,7 +469,7 @@ bool WritePreparedTxnDB::AddCommitEntry(const uint64_t indexed_seq,
                                         const CommitEntry& new_entry,
                                         CommitEntry* evicted_entry) {
   CommitEntry64b new_entry_64b(new_entry, FORMAT);
-  CommitEntry64b evicted_entry_64b = commit_cache_[indexed_seq].exchange(
+  CommitEntry64b evicted_entry_64b = commit_cache_[static_cast<size_t>(indexed_seq)].exchange(
       new_entry_64b, std::memory_order_acq_rel);
   bool valid = evicted_entry_64b.Parse(indexed_seq, evicted_entry, FORMAT);
   return valid;
@@ -478,7 +478,7 @@ bool WritePreparedTxnDB::AddCommitEntry(const uint64_t indexed_seq,
 bool WritePreparedTxnDB::ExchangeCommitEntry(const uint64_t indexed_seq,
                                              CommitEntry64b& expected_entry_64b,
                                              const CommitEntry& new_entry) {
-  auto& atomic_entry = commit_cache_[indexed_seq];
+  auto& atomic_entry = commit_cache_[static_cast<size_t>(indexed_seq)];
   CommitEntry64b new_entry_64b(new_entry, FORMAT);
   bool succ = atomic_entry.compare_exchange_strong(
       expected_entry_64b, new_entry_64b, std::memory_order_acq_rel,