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Tip revision: 0645e8b42cbf34ce5ac4e583c80c668e5ca56756 authored by Yi Wu on 09 May 2016, 18:52:28 UTC
Fix win build
Fix win build
Tip revision: 0645e8b
random.cc
// 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.
//
#include "util/random.h"
#include <stdint.h>
#include <string.h>
#include <thread>
#include <utility>
#include "port/likely.h"
#include "util/thread_local.h"
#if ROCKSDB_SUPPORT_THREAD_LOCAL
#define STORAGE_DECL static __thread
#else
#define STORAGE_DECL static
#endif
namespace rocksdb {
Random* Random::GetTLSInstance() {
STORAGE_DECL Random* tls_instance;
STORAGE_DECL std::aligned_storage<sizeof(Random)>::type tls_instance_bytes;
auto rv = tls_instance;
if (UNLIKELY(rv == nullptr)) {
size_t seed = std::hash<std::thread::id>()(std::this_thread::get_id());
rv = new (&tls_instance_bytes) Random((uint32_t)seed);
tls_instance = rv;
}
return rv;
}
} // namespace rocksdb