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/*
* Copyright 2016 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef incl_FOLLY_ATOMIC_HASH_UTILS_H
#define incl_FOLLY_ATOMIC_HASH_UTILS_H
#include <folly/Portability.h>
#include <thread>
// Some utilities used by AtomicHashArray and AtomicHashMap
//
namespace folly { namespace detail {
template <typename Cond>
void atomic_hash_spin_wait(Cond condition) {
constexpr size_t kPauseLimit = 10000;
for (size_t i = 0; condition(); ++i) {
if (i < kPauseLimit) {
folly::asm_pause();
} else {
std::this_thread::yield();
}
}
}
}} // namespace folly::detail
#endif
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