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/*
* Copyright (C) 2011 The Android Open Source Project
*
* 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 ART_SRC_MUTEX_H_
#define ART_SRC_MUTEX_H_
#include <pthread.h>
#include <stdint.h>
#include <iosfwd>
#include <string>
#include "gtest/gtest.h"
#include "logging.h"
#include "macros.h"
namespace art {
enum MutexRank {
kNoMutexRank = -1,
kHeapLock = 0,
kThreadListLock = 1,
kThreadSuspendCountLock = 2,
kMaxMutexRank = kThreadSuspendCountLock,
};
std::ostream& operator<<(std::ostream& os, const MutexRank& rhs);
class Mutex {
public:
explicit Mutex(const char* name, MutexRank rank = kNoMutexRank);
~Mutex();
void Lock();
bool TryLock();
void Unlock();
#if !defined(NDEBUG)
void AssertHeld();
void AssertNotHeld();
#else
void AssertHeld() {}
void AssertNotHeld() {}
#endif
uint64_t GetOwner();
private:
uint32_t GetDepth();
pthread_mutex_t mutex_;
std::string name_;
MutexRank rank_;
friend class ConditionVariable;
friend class MutexTester;
DISALLOW_COPY_AND_ASSIGN(Mutex);
};
class MutexLock {
public:
explicit MutexLock(Mutex& mu) : mu_(mu) {
mu_.Lock();
}
~MutexLock() {
mu_.Unlock();
}
private:
Mutex& mu_;
DISALLOW_COPY_AND_ASSIGN(MutexLock);
};
class ConditionVariable {
public:
explicit ConditionVariable(const std::string& name);
~ConditionVariable();
void Broadcast();
void Signal();
void Wait(Mutex& mutex);
void TimedWait(Mutex& mutex, const timespec& ts);
private:
pthread_cond_t cond_;
std::string name_;
DISALLOW_COPY_AND_ASSIGN(ConditionVariable);
};
} // namespace art
#endif // ART_SRC_MUTEX_H_