/*
 * 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) 2011-2014, 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 <signal.h>
#include "threadmanager.h"
#include "log.h"


namespace Winix
{




ThreadManager::ThreadManager()
{
	were_started = false;
}


void ThreadManager::SetSynchro(Synchro * psynchro)
{
	synchro = psynchro;
}


void ThreadManager::Init()
{
sigset_t set;

	sigemptyset(&set);
	sigaddset(&set, SIGTERM);
	sigaddset(&set, SIGINT);

	// blocking SIGTERM and SIGINT
	// new threads will have the signals blocked too
	pthread_sigmask(SIG_BLOCK, &set, 0);
}




void ThreadManager::Add(BaseThread * pbase, const wchar_t * thread_name)
{
ThreadItem item;

	item.object = pbase;
	item.name   = thread_name;
	thread_tab.push_back(item);

	if( were_started )
		Start(thread_tab.size() - 1);
	else
		log << log4 << "TM: added a thread to the queue, number: " << (thread_tab.size()-1)
			<< ", name: " << thread_name << logend;
}


void ThreadManager::Add(BaseThread & pbase, const wchar_t * thread_name)
{
	Add(&pbase, thread_name);
}


void ThreadManager::Add(BaseThread * pbase, const std::wstring & thread_name)
{
	Add(pbase, thread_name.c_str());
}

void ThreadManager::Add(BaseThread & pbase, const std::wstring & thread_name)
{
	Add(&pbase, thread_name.c_str());
}



void ThreadManager::StartAll()
{
	synchro->Lock();

	for(size_t i=0 ; i<thread_tab.size() ; ++i)
		Start(i);

	synchro->Unlock();

	were_started = true;
}


void ThreadManager::Start(size_t i)
{
	if( i < thread_tab.size() )
	{
		thread_tab[i].object->SetSynchro(synchro);

		if( thread_tab[i].object->StartThread() )
		{
			log << log4 << "TM: thread " << i << " (" << thread_tab[i].object->ThreadId() << ", name: "
				<< thread_tab[i].name << ") started" << logend;
		}
		else
		{
			log << log4 << "TM: cannot run a thread, thread number: " << i
				<< ", name: " << thread_tab[i].name << logend;
		}
	}
}


void ThreadManager::StopAll()
{
	if( !were_started )
		return;

	// WakeUpThread() should be used with Lock/Unlock
	synchro->Lock();

	for(size_t i=0 ; i<thread_tab.size() ; ++i)
		thread_tab[i].object->WakeUpThread();

	synchro->Unlock();


	for(size_t i=0 ; i<thread_tab.size() ; ++i)
	{
		log << log4 << "TM: waiting for thread " << i << " (" << thread_tab[i].object->ThreadId()
			<< ", name: " << thread_tab[i].name << ")" << logend;

		thread_tab[i].object->WaitForThread();

		log << log4 << "TM: thread " << i << " terminated" << logend;
	}
}




} // namespace Winix