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winix/winixd/core/basethread.cpp

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/*
* This file is a part of Winix
* and is distributed under the 2-Clause BSD licence.
* Author: Tomasz Sowa <t.sowa@ttmath.org>
*/
/*
* Copyright (c) 2010-2019, Tomasz Sowa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <errno.h>
#include "basethread.h"
namespace Winix
{
BaseThread::BaseThread() : thread_signal(PTHREAD_COND_INITIALIZER)
{
synchro = 0;
thread_id = 0;
work_mode = 0;
wake_up_was_called = false;
}
BaseThread::~BaseThread()
{
}
void BaseThread::set_main_log_buffer(pt::WTextStream * log_buffer)
{
main_log.set_log_buffer(log_buffer);
}
void BaseThread::set_main_file_log(pt::FileLog * file_log)
{
main_log.set_file_log(file_log);
}
void BaseThread::Mode(int mode)
{
work_mode = mode;
}
pthread_t BaseThread::ThreadId()
{
return thread_id;
}
bool BaseThread::Lock()
{
return synchro->Lock();
}
void BaseThread::Unlock()
{
synchro->Unlock();
}
bool BaseThread::IsExitSignal()
{
bool res = true;
if( Lock() )
{
res = synchro->was_stop_signal;
Unlock();
}
return res;
}
bool BaseThread::BaseInit()
{
bool init_status = false;
if( Lock() )
{
init_status = Init(); // your virtual method
Unlock();
}
return init_status;
}
void BaseThread::BaseUninit()
{
if( Lock() )
{
Uninit(); // your virtual method
Unlock();
}
}
bool BaseThread::BaseSignalReceived()
{
bool make_do = false;
wake_up_was_called = false;
try
{
make_do = SignalReceived(); // your short-time virtual method (objects are locked)
}
catch(...)
{
}
return make_do;
}
// this is called only if your SignalReceived() returned true
void BaseThread::BaseDo()
{
try
{
Do(); // your long-time virtual method (objects are *not* locked)
}
catch(...)
{
}
}
// use it with Lock and Unlock
bool BaseThread::WaitForSignal()
{
if( synchro->was_stop_signal || wake_up_was_called )
return true;
return pthread_cond_wait(&thread_signal, &synchro->mutex) == 0;
}
// you should use this method with: synchro->Lock() and Unlock()
void BaseThread::WakeUpThread()
{
wake_up_was_called = true;
pthread_cond_signal(&thread_signal);
}
// use it with Lock and Unlock
// it breaks only if there was a stop signal or the time has expired
bool BaseThread::WaitForSignalSleep(time_t second)
{
timespec t;
int res;
if( synchro->was_stop_signal )
return true;
t.tv_sec = time(0) + second;
t.tv_nsec = 0;
do
{
res = pthread_cond_timedwait(&thread_signal, &synchro->mutex, &t);
}
while( res == 0 && !synchro->was_stop_signal );
// above condition means there was a signal
// but it was not a stop signal so we should still wait
return res == 0 || res == ETIMEDOUT;
}
void BaseThread::WaitForThread()
{
pthread_join(thread_id, 0);
}
void BaseThread::SignalLoop()
{
bool make_do;
do
{
if( Lock() )
{
make_do = false;
if( WaitForSignal() ) // automatically unlock, wait and lock again when signal comes
if( !synchro->was_stop_signal )
make_do = BaseSignalReceived(); // your short-time virtual method will be called (objects locked)
Unlock(); // unlocking from WaitForSignal()
if( make_do )
BaseDo(); // your long-time virtual method will be called (objects *not* locked)
}
}
while( !IsExitSignal() );
}
void * BaseThread::StartRoutine(void * this_object)
{
BaseThread * base = reinterpret_cast<BaseThread*>(this_object);
if( base->synchro )
{
if( base->BaseInit() )
{
if( base->work_mode == 0 )
base->SignalLoop();
else
base->Work();
base->BaseUninit();
}
}
base->save_log();
pthread_exit(0);
return 0;
}
bool BaseThread::StartThread()
{
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
int res = pthread_create(&thread_id, &attr, StartRoutine, this);
pthread_attr_destroy(&attr);
return res == 0;
}
} // namespace Winix