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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2013-2015 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008, 2010 Craig Edwards <brain@inspircd.org>
*
* 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_pthread.h"
#include <pthread.h>
#include <fcntl.h>
static void* entry_point(void* parameter)
{
/* Recommended by nenolod, signal safety on a per-thread basis */
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGPIPE);
pthread_sigmask(SIG_BLOCK, &set, NULL);
Thread* pt = static_cast<Thread*>(parameter);
pt->Run();
return parameter;
}
void ThreadEngine::Start(Thread* thread)
{
if (pthread_create(&thread->state.pthread_id, NULL, entry_point, thread) != 0)
throw CoreException("Unable to create new thread: " + std::string(strerror(errno)));
}
void ThreadEngine::Stop(Thread* thread)
{
thread->SetExitFlag();
pthread_join(thread->state.pthread_id, NULL);
}
#ifdef HAS_EVENTFD
#include <sys/eventfd.h>
class ThreadSignalSocket : public EventHandler
{
SocketThread* parent;
public:
ThreadSignalSocket(SocketThread* p, int newfd) : parent(p)
{
SetFd(newfd);
SocketEngine::AddFd(this, FD_WANT_FAST_READ | FD_WANT_NO_WRITE);
}
~ThreadSignalSocket()
{
SocketEngine::Close(this);
}
void Notify()
{
eventfd_write(fd, 1);
}
void OnEventHandlerRead() CXX11_OVERRIDE
{
eventfd_t dummy;
eventfd_read(fd, &dummy);
parent->OnNotify();
}
void OnEventHandlerWrite() CXX11_OVERRIDE
{
ServerInstance->GlobalCulls.AddItem(this);
}
void OnEventHandlerError(int errcode) CXX11_OVERRIDE
{
ThreadSignalSocket::OnEventHandlerWrite();
}
};
SocketThread::SocketThread()
{
signal.sock = NULL;
int fd = eventfd(0, EFD_NONBLOCK);
if (fd < 0)
throw CoreException("Could not create pipe " + std::string(strerror(errno)));
signal.sock = new ThreadSignalSocket(this, fd);
}
#else
class ThreadSignalSocket : public EventHandler
{
SocketThread* parent;
int send_fd;
public:
ThreadSignalSocket(SocketThread* p, int recvfd, int sendfd) :
parent(p), send_fd(sendfd)
{
SetFd(recvfd);
SocketEngine::NonBlocking(fd);
SocketEngine::AddFd(this, FD_WANT_FAST_READ | FD_WANT_NO_WRITE);
}
~ThreadSignalSocket()
{
close(send_fd);
SocketEngine::Close(this);
}
void Notify()
{
static const char dummy = '*';
write(send_fd, &dummy, 1);
}
void OnEventHandlerRead() CXX11_OVERRIDE
{
char dummy[128];
read(fd, dummy, 128);
parent->OnNotify();
}
void OnEventHandlerWrite() CXX11_OVERRIDE
{
ServerInstance->GlobalCulls.AddItem(this);
}
void OnEventHandlerError(int errcode) CXX11_OVERRIDE
{
ThreadSignalSocket::OnEventHandlerWrite();
}
};
SocketThread::SocketThread()
{
signal.sock = NULL;
int fds[2];
if (pipe(fds))
throw CoreException("Could not create pipe " + std::string(strerror(errno)));
signal.sock = new ThreadSignalSocket(this, fds[0], fds[1]);
}
#endif
void SocketThread::NotifyParent()
{
signal.sock->Notify();
}
SocketThread::~SocketThread()
{
if (signal.sock)
{
signal.sock->cull();
delete signal.sock;
}
}
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