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// 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).
//
#pragma once
#include "monitoring/perf_step_timer.h"
#include "rocksdb/iostats_context.h"
#ifdef ROCKSDB_SUPPORT_THREAD_LOCAL
namespace ROCKSDB_NAMESPACE {
extern __thread IOStatsContext iostats_context;
} // namespace ROCKSDB_NAMESPACE
// increment a specific counter by the specified value
#define IOSTATS_ADD(metric, value) (iostats_context.metric += value)
// Increase metric value only when it is positive
#define IOSTATS_ADD_IF_POSITIVE(metric, value) \
if (value > 0) { IOSTATS_ADD(metric, value); }
// reset a specific counter to zero
#define IOSTATS_RESET(metric) (iostats_context.metric = 0)
// reset all counters to zero
#define IOSTATS_RESET_ALL() (iostats_context.Reset())
#define IOSTATS_SET_THREAD_POOL_ID(value) \
(iostats_context.thread_pool_id = value)
#define IOSTATS_THREAD_POOL_ID() (iostats_context.thread_pool_id)
#define IOSTATS(metric) (iostats_context.metric)
// Declare and set start time of the timer
#define IOSTATS_TIMER_GUARD(metric) \
PerfStepTimer iostats_step_timer_##metric(&(iostats_context.metric)); \
iostats_step_timer_##metric.Start();
// Declare and set start time of the timer
#define IOSTATS_CPU_TIMER_GUARD(metric, env) \
PerfStepTimer iostats_step_timer_##metric( \
&(iostats_context.metric), env, true, \
PerfLevel::kEnableTimeAndCPUTimeExceptForMutex); \
iostats_step_timer_##metric.Start();
#else // ROCKSDB_SUPPORT_THREAD_LOCAL
#define IOSTATS_ADD(metric, value)
#define IOSTATS_ADD_IF_POSITIVE(metric, value)
#define IOSTATS_RESET(metric)
#define IOSTATS_RESET_ALL()
#define IOSTATS_SET_THREAD_POOL_ID(value)
#define IOSTATS_THREAD_POOL_ID()
#define IOSTATS(metric) 0
#define IOSTATS_TIMER_GUARD(metric)
#define IOSTATS_CPU_TIMER_GUARD(metric, env) static_cast<void>(env)
#endif // ROCKSDB_SUPPORT_THREAD_LOCAL
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