Addition of libbitdht.

============================================================

This is intended to be a completely independent library from RS, 
(hosted at sf.net/projects/bitdht) hence is being commited at the top level.

As initial further development / testing will be driven by RS integration
it is being added to the RS repository. Equally important is ensuring
that RS can compile without requiring aux libraries.

Once libbitdht is further developed, this section of the repository
is expected to be removed... But that will not be for a while, I expect.

drbob.



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@3276 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libbitdht/src/util/bdthreads.cc

@@ -0,0 +1,79 @@
+/*
+ * bitdht/bdthreads.cc
+ *
+ * BitDHT: An Flexible DHT library.
+ *
+ * Copyright 2010 by Robert Fernie
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License Version 3 as published by the Free Software Foundation.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA.
+ *
+ * Please report all bugs and problems to "bitdht@lunamutt.com".
+ *
+ */
+
+
+
+#include "bdthreads.h"
+#include <unistd.h>    /* for usleep() */
+
+/*******
+ * #define DEBUG_THREADS 1
+ *******/
+
+#ifdef DEBUG_THREADS
+	#include <iostream>
+#endif
+
+extern "C" void* bdthread_init(void* p)
+{
+  bdThread *thread = (bdThread *) p;
+  if (!thread)
+  {
+    return 0;
+  }
+  thread -> run();
+  return 0;
+}
+
+
+pthread_t  createThread(bdThread &thread)
+{
+    pthread_t tid;
+    void  *data = (void *) (&thread);
+
+    thread.mMutex.lock();
+    {
+      	pthread_create(&tid, 0, &bdthread_init, data);
+      	thread.mTid = tid;
+    }
+    thread.mMutex.unlock();
+
+    return tid;
+
+}
+
+void bdThread::join() /* waits for the the mTid thread to stop */
+{
+	void *ptr;
+	pthread_join(mTid, &ptr);
+}
+
+void bdThread::stop() 
+{
+	pthread_exit(NULL);
+}
+
+
+

libbitdht/src/util/bdthreads.h

@@ -0,0 +1,81 @@
+#ifndef BITDHT_THREADS_H
+#define BITDHT_THREADS_H
+
+/*
+ * bitdht/bdthreads.h
+ *
+ * BitDHT: An Flexible DHT library.
+ *
+ * Copyright 2010 by Robert Fernie
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License Version 3 as published by the Free Software Foundation.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA.
+ *
+ * Please report all bugs and problems to "bitdht@lunamutt.com".
+ *
+ */
+
+
+#include <pthread.h>
+#include <inttypes.h>
+
+/* Thread Wrappers */
+
+class bdMutex
+{
+	public:
+
+	bdMutex() { pthread_mutex_init(&realMutex, NULL); }
+        ~bdMutex() { pthread_mutex_destroy(&realMutex); }
+void	lock() { pthread_mutex_lock(&realMutex); }
+void	unlock() { pthread_mutex_unlock(&realMutex); }
+bool	trylock() { return (0 == pthread_mutex_trylock(&realMutex)); }
+
+	private:
+	pthread_mutex_t  realMutex;
+};
+
+class bdStackMutex
+{
+	public:
+
+	bdStackMutex(bdMutex &mtx): mMtx(mtx) { mMtx.lock(); }
+        ~bdStackMutex() { mMtx.unlock(); }
+
+	private:
+	bdMutex &mMtx;
+};
+
+class bdThread;
+
+/* to create a thread! */
+pthread_t  createThread(bdThread &thread);
+
+class bdThread
+{
+	public:
+	bdThread() { return; }
+virtual ~bdThread() { return; }
+
+virtual void start() { createThread(*this); }
+virtual void run() = 0; /* called once the thread is started */
+virtual	void join(); /* waits for the mTid thread to stop */
+virtual	void stop(); /* calls pthread_exit() */
+
+	pthread_t mTid;
+        bdMutex   mMutex;
+};
+
+
+#endif