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/*
* thread.h
*
* thread classes
*
* Copyright (c) 2004 by FORCE Computers.
*
* 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. This
* file and program are licensed under a BSD style license. See
* the Copying file included with the OpenHPI distribution for
* full licensing terms.
*
* Authors:
* Thomas Kanngieser <thomas.kanngieser@fci.com>
*/
#ifndef dThread_h
#define dThread_h
#include <pthread.h>
#include <unistd.h>
enum tTheadState
{
eTsUnknown,
eTsSuspend,
eTsRun,
eTsExit
};
// thread class
class cThread
{
protected:
pthread_t m_thread;
bool m_main; // true => main thread
tTheadState m_state;
static void *Thread( void *param );
public:
cThread();
cThread( const pthread_t &thread, bool main_thread, tTheadState state );
virtual ~cThread();
// get the current thread class
static cThread *GetThread();
// start thread
virtual bool Start();
// wait for thread termination
virtual bool Wait( void *&rv );
bool IsRunning() { return m_state == eTsRun; }
bool IsMain() { return m_main; }
protected:
virtual void *Run() = 0;
virtual void Exit( void *rv );
};
// simple locks
class cThreadLock
{
protected:
pthread_mutex_t m_lock;
public:
cThreadLock();
virtual ~cThreadLock();
virtual void Lock();
virtual void Unlock();
virtual bool TryLock();
};
class cThreadLockAuto
{
cThreadLock &m_lock;
public:
cThreadLockAuto( cThreadLock &lock )
: m_lock( lock )
{
m_lock.Lock();
}
~cThreadLockAuto()
{
m_lock.Unlock();
}
};
// read/write locks
class cThreadLockRw
{
protected:
pthread_rwlock_t m_rwlock;
public:
cThreadLockRw();
virtual ~cThreadLockRw();
virtual void ReadLock();
virtual void ReadUnlock();
virtual bool TryReadLock();
virtual void WriteLock();
virtual void WriteUnlock();
virtual bool TryWriteLock();
// true => no lock held
bool CheckLock();
};
// condition class
class cThreadCond : public cThreadLock
{
protected:
pthread_cond_t m_cond;
public:
cThreadCond();
virtual ~cThreadCond();
// call Lock before Signal
virtual void Signal();
// call Lock before Wait
virtual void Wait();
};
#endif
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