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// Copyright (c) 2012-2014 Konstantin Isakov <ikm@zbackup.org>
// Part of ZBackup. Licensed under GNU GPLv2 or later + OpenSSL, see LICENSE
#ifndef MT_HH_INCLUDED__
#define MT_HH_INCLUDED__
#include <pthread.h>
#include <stddef.h>
#include "nocopy.hh"
/// Multithreading
class Condition;
class Mutex
{
friend class Condition;
pthread_mutex_t mutex;
public:
Mutex();
/// Please consider using the Lock class instead
void lock();
void unlock();
~Mutex();
};
class Lock: NoCopy
{
Mutex * m;
public:
Lock( Mutex & mutex ): m( &mutex ) { m->lock(); }
~Lock()
{ m->unlock(); }
};
/// Condition variable. Atomically unlocks the given mutex before it suspends
/// waiting for event, and upon the awakening reacquires it
class Condition
{
pthread_cond_t cond;
public:
Condition();
void signal();
void broadcast();
/// Mutex must be locked on entrance
void wait( Mutex & m );
~Condition();
};
class Thread
{
public:
void start();
void detach();
void * join();
virtual ~Thread() {}
protected:
/// This is the function that is meant to work in a separate thread
virtual void * threadFunction() throw()=0;
private:
pthread_t thread;
static void * __thread_routine( void * );
};
/// Returns the number of CPUs this system has
size_t getNumberOfCpus();
#endif
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