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RocksDB for Erlang

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rocksdb deps rocksdb db write_stall_stats.h
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deps/rocksdb/db/write_stall_stats.h 

//  Copyright (c) Facebook, Inc. and its affiliates. 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).



#pragma once



#include <array>



#include "db/internal_stats.h"

#include "rocksdb/types.h"



namespace ROCKSDB_NAMESPACE {

const std::string& InvalidWriteStallHyphenString();



const std::string& WriteStallCauseToHyphenString(WriteStallCause cause);



const std::string& WriteStallConditionToHyphenString(

    WriteStallCondition condition);



// REQUIRES:

// cause` is CF-scope `WriteStallCause`, see `WriteStallCause` for more

//

// REQUIRES:

// `condition` != `WriteStallCondition::kNormal`

InternalStats::InternalCFStatsType InternalCFStat(

    WriteStallCause cause, WriteStallCondition condition);



// REQUIRES:

// cause` is DB-scope `WriteStallCause`, see `WriteStallCause` for more

//

// REQUIRES:

// `condition` != `WriteStallCondition::kNormal`

InternalStats::InternalDBStatsType InternalDBStat(

    WriteStallCause cause, WriteStallCondition condition);



bool isCFScopeWriteStallCause(WriteStallCause cause);

bool isDBScopeWriteStallCause(WriteStallCause cause);



constexpr uint32_t kNumCFScopeWriteStallCauses =

    static_cast<uint32_t>(WriteStallCause::kCFScopeWriteStallCauseEnumMax) -

    static_cast<uint32_t>(WriteStallCause::kMemtableLimit);



constexpr uint32_t kNumDBScopeWriteStallCauses =

    static_cast<uint32_t>(WriteStallCause::kDBScopeWriteStallCauseEnumMax) -

    static_cast<uint32_t>(WriteStallCause::kWriteBufferManagerLimit);

}  // namespace ROCKSDB_NAMESPACE