/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "inspircd.h"
#include "threadengines/threadengine_win32.h"

ThreadEngine::ThreadEngine()
{
}

void ThreadEngine::Start(Thread* thread)
{
	ThreadData* data = new ThreadData;
	thread->state = data;

	DWORD ThreadId = 0;
	data->handle = CreateThread(NULL,0,ThreadEngine::Entry,thread,0,&ThreadId);

	if (data->handle == NULL)
	{
		thread->state = NULL;
		delete data;
		std::string err = "Unable to create new thread: ";
#ifdef _WIN32
		CHAR errdetail[100];
		FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, 0, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errdetail, 100, 0);
		SetLastError(ERROR_SUCCESS);
		err += errdetail;
#else
		err += dlerror();
#endif
		throw CoreException(err);
	}
}

ThreadEngine::~ThreadEngine()
{
}

DWORD WINAPI ThreadEngine::Entry(void* parameter)
{
	Thread* pt = static_cast<Thread*>(parameter);
	pt->Run();
	return 0;
}

void ThreadData::FreeThread(Thread* thread)
{
	thread->SetExitFlag();
	WaitForSingleObject(handle,INFINITE);
	CloseHandle(handle);
}

class ThreadSignalSocket : public BufferedSocket
{
	SocketThread* parent;
 public:
	ThreadSignalSocket(SocketThread* t, int newfd)
		: BufferedSocket(newfd), parent(t)
	{
	}

	void OnDataReady()
	{
		recvq.clear();
		parent->OnNotify();
	}

	void OnError(BufferedSocketError)
	{
		ServerInstance->GlobalCulls.AddItem(this);
	}
};

SocketThread::SocketThread()
{
	int listenFD = socket(AF_INET, SOCK_STREAM, 0);
	if (listenFD == -1)
		throw CoreException("Could not create ITC pipe");
	int connFD = socket(AF_INET, SOCK_STREAM, 0);
	if (connFD == -1)
		throw CoreException("Could not create ITC pipe");

	if (!ServerInstance->BindSocket(listenFD, 0, "127.0.0.1", true))
		throw CoreException("Could not create ITC pipe");
	ServerInstance->SE->NonBlocking(connFD);

	struct sockaddr_in addr;
	socklen_t sz = sizeof(addr);
	getsockname(listenFD, reinterpret_cast<struct sockaddr*>(&addr), &sz);
	connect(connFD, reinterpret_cast<struct sockaddr*>(&addr), sz);
	ServerInstance->SE->Blocking(listenFD);
	int nfd = accept(listenFD, reinterpret_cast<struct sockaddr*>(&addr), &sz);
	if (nfd < 0)
		throw CoreException("Could not create ITC pipe");
	new ThreadSignalSocket(this, nfd);
	closesocket(listenFD);

	ServerInstance->SE->Blocking(connFD);
	this->signal.connFD = connFD;
}

void SocketThread::NotifyParent()
{
	char dummy = '*';
	send(signal.connFD, &dummy, 1, 0);
}

SocketThread::~SocketThread()
{
	if (signal.connFD >= 0)
	{
		shutdown(signal.connFD, 2);
		closesocket(signal.connFD);
	}
}
