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/*
Firewall Builder
Copyright (C) 2001 NetCitadel, LLC
Author: Vadim Zaliva lord@crocodile.org
$Id$
This program is free software which we release under the GNU General Public
License. You may redistribute and/or modify this program under the terms
of that 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.
To get a copy of the GNU General Public License, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __THREAD_TOOLS_H_FLAG__
#define __THREAD_TOOLS_H_FLAG__
#include "fwbuilder/libfwbuilder-config.h"
#include <time.h> //for time_t definition
#include <pthread.h>
#include <unistd.h>
#include <string>
#include <queue>
#include "fwbuilder/FWException.h"
namespace libfwbuilder
{
/**
* POSIX Mutex wrapper class.
*/
class Mutex
{
friend class Cond;
protected:
pthread_mutex_t mutex;
public:
Mutex();
virtual ~Mutex();
void lock() const;
void unlock() const;
};
/**
* POSIX Mutex wrapper class.
*/
class Cond
{
protected:
pthread_cond_t cond;
public:
Cond();
virtual ~Cond();
bool wait(const Mutex &mutex) const;
void signal () const;
void broadcast() const;
};
/**
* This class represents boolean value, access to which
* is guarded by mutex.
*/
class SyncFlag: public Mutex
{
private:
bool value;
public:
SyncFlag(bool v=false);
/**
* Checks value without locking.
* Use with lock/unlock()
*/
bool peek() const;
/**
* Changes value without locking.
* Use with lock/unlock()
*/
void modify(bool v);
bool get() const;
void set(bool v);
operator bool() const;
SyncFlag& operator=(const SyncFlag &o);
SyncFlag& operator=(bool v);
};
#ifndef _WIN32
/**
* Timeout counter. This class needs poll(2) which does not exist on Windows
*/
class TimeoutCounter
{
private:
unsigned int timeout ;
std::string name ;
time_t finish ;
public:
/**
* Creates counter with start time now
* and end time now+timeout. String is counter
* name which will be used in thrown exception
* in check() method.
* NB: timeout is in whole seconds.
*/
TimeoutCounter(unsigned int timeout, const std::string &name);
/**
* Starts counter with start time 'now'
* and end time now+timeout.
* Could be called several times to restart it.
*/
void start();
/**
* retunrs time left before
* timeout expiration (in seconds)
*/
unsigned int timeLeft() const;
/**
* Returns 'true' if timeout is expired.
*/
bool isExpired() const;
/**
* Throw exception if timeout is expired
*/
void check() const throw(FWException) ;
/**
* Reads from socket/file.
* Throws FWException if timeout occured.
*/
ssize_t read(int fd, void *buf, size_t n) const throw(FWException);
};
#endif
}
#endif //__THREAD_TOOLS_H_FLAG__
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