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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/statistics.h"
#include "port/port.h"
#include "rocksdb/env.h"
#include "rocksdb/statistics.h"
#include "rocksdb/thread_status.h"
#include "util/stop_watch.h"
namespace ROCKSDB_NAMESPACE {
class InstrumentedCondVar;
// A wrapper class for port::Mutex that provides additional layer
// for collecting stats and instrumentation.
class InstrumentedMutex {
public:
explicit InstrumentedMutex(bool adaptive = false)
: mutex_(adaptive), stats_(nullptr), env_(nullptr),
stats_code_(0) {}
InstrumentedMutex(
Statistics* stats, Env* env,
int stats_code, bool adaptive = false)
: mutex_(adaptive), stats_(stats), env_(env),
stats_code_(stats_code) {}
void Lock();
void Unlock() {
mutex_.Unlock();
}
void AssertHeld() {
mutex_.AssertHeld();
}
private:
void LockInternal();
friend class InstrumentedCondVar;
port::Mutex mutex_;
Statistics* stats_;
Env* env_;
int stats_code_;
};
// A wrapper class for port::Mutex that provides additional layer
// for collecting stats and instrumentation.
class InstrumentedMutexLock {
public:
explicit InstrumentedMutexLock(InstrumentedMutex* mutex) : mutex_(mutex) {
mutex_->Lock();
}
~InstrumentedMutexLock() {
mutex_->Unlock();
}
private:
InstrumentedMutex* const mutex_;
InstrumentedMutexLock(const InstrumentedMutexLock&) = delete;
void operator=(const InstrumentedMutexLock&) = delete;
};
class InstrumentedCondVar {
public:
explicit InstrumentedCondVar(InstrumentedMutex* instrumented_mutex)
: cond_(&(instrumented_mutex->mutex_)),
stats_(instrumented_mutex->stats_),
env_(instrumented_mutex->env_),
stats_code_(instrumented_mutex->stats_code_) {}
void Wait();
bool TimedWait(uint64_t abs_time_us);
void Signal() {
cond_.Signal();
}
void SignalAll() {
cond_.SignalAll();
}
private:
void WaitInternal();
bool TimedWaitInternal(uint64_t abs_time_us);
port::CondVar cond_;
Statistics* stats_;
Env* env_;
int stats_code_;
};
} // namespace ROCKSDB_NAMESPACE
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