Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/src/rocksdb/port/win/env_default.cc b/src/rocksdb/port/win/env_default.cc
new file mode 100644
index 00000000..d24c2191
--- /dev/null
+++ b/src/rocksdb/port/win/env_default.cc
@@ -0,0 +1,41 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  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).
+//
+// 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 <mutex>
+
+#include <rocksdb/env.h>
+#include "port/win/env_win.h"
+#include "util/compression_context_cache.h"
+#include "util/sync_point.h"
+#include "util/thread_local.h"
+
+namespace rocksdb {
+namespace port {
+
+// We choose not to destroy the env because joining the threads from the
+// system loader
+//    which destroys the statics (same as from DLLMain) creates a system loader
+//    dead-lock.
+//    in this manner any remaining threads are terminated OK.
+namespace {
+  std::once_flag winenv_once_flag;
+  Env* envptr;
+};
+}
+
+Env* Env::Default() {
+  using namespace port;
+  ThreadLocalPtr::InitSingletons();
+  CompressionContextCache::InitSingleton();
+  INIT_SYNC_POINT_SINGLETONS();
+  std::call_once(winenv_once_flag, []() { envptr = new WinEnv(); });
+  return envptr;
+}
+
+}