d616ebea23
Summary: Closes https://github.com/facebook/rocksdb/pull/2226 Differential Revision: D4967547 Pulled By: siying fbshipit-source-id: dd3b58ae1e7a106ab6bb6f37ab5c88575b125ab4
45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// 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.
|
|
//
|
|
// 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"
|
|
|
|
namespace rocksdb {
|
|
namespace port {
|
|
|
|
// We choose to create this on the heap and using std::once for the following
|
|
// reasons
|
|
// 1) Currently available MS compiler does not implement atomic C++11
|
|
// initialization of
|
|
// function local statics
|
|
// 2) 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;
|
|
std::call_once(winenv_once_flag, []() { envptr = new WinEnv(); });
|
|
return envptr;
|
|
}
|
|
|
|
}
|
|
|