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/*
Copyright (C) 2009 Red Hat, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _H_THREADS
#define _H_THREADS
#include "pthread.h"
#include "atomic_count.h"
class Thread {
public:
typedef void* (*thread_main_t)(void*);
Thread(thread_main_t thread_main, void* opaque);
void join();
private:
pthread_t _thread;
};
class Mutex {
public:
enum Type {
NORMAL,
RECURSIVE,
};
Mutex(Type = NORMAL);
virtual ~Mutex();
private:
friend class Lock;
pthread_mutex_t* get() {return &_mutex;}
private:
pthread_mutex_t _mutex;
};
class Lock {
public:
Lock(Mutex& mutex)
: _locked (true)
, _mutex (mutex)
{
pthread_mutex_lock(_mutex.get());
}
Lock(Mutex& mutex, uint64_t timout_nano)
: _mutex (mutex)
{
if (!pthread_mutex_trylock(_mutex.get())) {
_locked = true;
return;
}
timed_lock(timout_nano);
}
~Lock()
{
unlock();
}
void unlock()
{
if (_locked) {
pthread_mutex_unlock(_mutex.get());
_locked = false;
}
}
bool is_locked() { return _locked;}
private:
friend class Condition;
pthread_mutex_t* get() {return _mutex.get();}
void timed_lock(uint64_t timout_nano);
private:
bool _locked;
Mutex& _mutex;
};
class RecurciveMutex: public Mutex {
public:
RecurciveMutex() : Mutex(Mutex::RECURSIVE) {}
};
typedef Lock RecurciveLock;
class Condition {
public:
Condition();
~Condition()
{
pthread_cond_destroy(&_condition);
}
void notify_one()
{
pthread_cond_signal(&_condition);
}
void notify_all()
{
pthread_cond_broadcast(&_condition);
}
void wait(Lock& lock)
{
pthread_cond_wait(&_condition, lock.get());
}
bool timed_wait(Lock& lock, uint64_t nano);
private:
pthread_cond_t _condition;
};
#endif
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