-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2009 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ * 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 program is free but copyrighted software; see
- * the file COPYING for details.
+ * 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 <signal.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;
+}
-pthread_mutex_t MyMutex = PTHREAD_MUTEX_INITIALIZER;
-PThreadEngine::PThreadEngine(InspIRCd* Instance) : ThreadEngine(Instance)
+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);
}
-void PThreadEngine::Create(Thread* thread_to_init)
+#ifdef HAS_EVENTFD
+#include <sys/eventfd.h>
+
+class ThreadSignalSocket : public EventHandler
{
- pthread_attr_t attribs;
- pthread_attr_init(&attribs);
- pthread_attr_setdetachstate(&attribs, PTHREAD_CREATE_JOINABLE);
- pthread_t* MyPThread = new pthread_t;
-
- /* Create a thread in a mutex. This prevents whacking the member value NewThread,
- * and also prevents recursive creation of threads by mistake (instead, the thread
- * will just deadlock itself)
- */
- Mutex(true);
-
- if (pthread_create(MyPThread, &attribs, PThreadEngine::Entry, (void*)this) != 0)
+ SocketThread* parent;
+ public:
+ ThreadSignalSocket(SocketThread* p, int newfd) : parent(p)
{
- delete MyPThread;
- Mutex(false);
- throw CoreException("Unable to create new PThreadEngine: " + std::string(strerror(errno)));
+ SetFd(newfd);
+ SocketEngine::AddFd(this, FD_WANT_FAST_READ | FD_WANT_NO_WRITE);
}
- pthread_attr_destroy(&attribs);
+ ~ThreadSignalSocket()
+ {
+ SocketEngine::Close(this);
+ }
- NewThread = thread_to_init;
- NewThread->Creator = this;
- NewThread->Extend("pthread", MyPThread);
+ void Notify()
+ {
+ eventfd_write(fd, 1);
+ }
- /* Always unset a mutex if you set it */
- Mutex(false);
+ void OnEventHandlerRead() CXX11_OVERRIDE
+ {
+ eventfd_t dummy;
+ eventfd_read(fd, &dummy);
+ parent->OnNotify();
+ }
- /* Wait for the PThreadEngine::Run method to take a copy of the
- * pointer and clear this member value
- */
- while (NewThread)
- usleep(1000);
-}
+ void OnEventHandlerWrite() CXX11_OVERRIDE
+ {
+ ServerInstance->GlobalCulls.AddItem(this);
+ }
-PThreadEngine::~PThreadEngine()
-{
-}
+ void OnEventHandlerError(int errcode) CXX11_OVERRIDE
+ {
+ ThreadSignalSocket::OnEventHandlerWrite();
+ }
+};
-void PThreadEngine::Run()
+SocketThread::SocketThread()
{
- /* Take a copy of the member value, then clear it. Do this
- * in a mutex so that we can be sure nothing else is looking
- * at it.
- */
- Mutex(true);
- Thread* nt = NewThread;
- NewThread = NULL;
- Mutex(false);
- /* Now we have our own safe copy, call the object on it */
- nt->Run();
+ 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
-bool PThreadEngine::Mutex(bool enable)
+class ThreadSignalSocket : public EventHandler
{
- if (enable)
- pthread_mutex_lock(&MyMutex);
- else
- pthread_mutex_unlock(&MyMutex);
-
- return false;
-}
+ 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);
+ }
-void* PThreadEngine::Entry(void* parameter)
-{
- /* Recommended by nenolod, signal safety on a per-thread basis */
- sigset_t set;
- sigemptyset(&set);
- sigaddset(&set, SIGPIPE);
- if(pthread_sigmask(SIG_BLOCK, &set, NULL))
- signal(SIGPIPE, SIG_IGN);
+ ~ThreadSignalSocket()
+ {
+ close(send_fd);
+ SocketEngine::Close(this);
+ }
- ThreadEngine * pt = (ThreadEngine*)parameter;
- pt->Run();
- return NULL;
-}
+ void Notify()
+ {
+ static const char dummy = '*';
+ write(send_fd, &dummy, 1);
+ }
-void PThreadEngine::FreeThread(Thread* thread)
-{
- pthread_t* pthread = NULL;
- if (thread->GetExt("pthread", pthread))
+ void OnEventHandlerRead() CXX11_OVERRIDE
{
- thread->SetExitFlag();
- int rc;
- void* status;
- rc = pthread_join(*pthread, &status);
- delete pthread;
+ char dummy[128];
+ read(fd, dummy, 128);
+ parent->OnNotify();
}
-}
-MutexFactory::MutexFactory(InspIRCd* Instance) : ServerInstance(Instance)
-{
-}
+ void OnEventHandlerWrite() CXX11_OVERRIDE
+ {
+ ServerInstance->GlobalCulls.AddItem(this);
+ }
-Mutex* MutexFactory::CreateMutex()
-{
- return new PosixMutex(this->ServerInstance);
-}
+ void OnEventHandlerError(int errcode) CXX11_OVERRIDE
+ {
+ ThreadSignalSocket::OnEventHandlerWrite();
+ }
+};
-PosixMutex::PosixMutex(InspIRCd* Instance) : Mutex(Instance)
+SocketThread::SocketThread()
{
- pthread_mutex_init(&putex, NULL);
+ 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
-PosixMutex::~PosixMutex()
+void SocketThread::NotifyParent()
{
- pthread_mutex_destroy(&putex);
+ signal.sock->Notify();
}
-void PosixMutex::Enable(bool enable)
+SocketThread::~SocketThread()
{
- if (enable)
- pthread_mutex_lock(&putex);
- else
- pthread_mutex_unlock(&putex);
+ if (signal.sock)
+ {
+ signal.sock->cull();
+ delete signal.sock;
+ }
}
projects / user / henk / code / inspircd.git / blobdiff