Adds trunk/talk folder of revision 359 from libjingles google code to

trunk/talk


git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/base/socketpool.h

@@ -0,0 +1,160 @@
+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * 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.
+ *  3. The name of the author may not be used to endorse or promote products 
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#ifndef TALK_BASE_SOCKETPOOL_H_
+#define TALK_BASE_SOCKETPOOL_H_
+
+#include <deque>
+#include <list>
+#include "talk/base/logging.h"
+#include "talk/base/sigslot.h"
+#include "talk/base/socketaddress.h"
+
+namespace talk_base {
+
+class AsyncSocket;
+class LoggingAdapter;
+class SocketFactory;
+class SocketStream;
+class StreamInterface;
+
+//////////////////////////////////////////////////////////////////////
+// StreamPool
+//////////////////////////////////////////////////////////////////////
+
+class StreamPool {
+public:
+  virtual ~StreamPool() { }
+
+  virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
+                                                  int* err) = 0;
+  virtual void ReturnConnectedStream(StreamInterface* stream) = 0;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// StreamCache - Caches a set of open streams, defers creation/destruction to
+//  the supplied StreamPool.
+///////////////////////////////////////////////////////////////////////////////
+
+class StreamCache : public StreamPool, public sigslot::has_slots<> {
+public:
+  StreamCache(StreamPool* pool);
+  virtual ~StreamCache();
+
+  // StreamPool Interface
+  virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
+                                                  int* err);
+  virtual void ReturnConnectedStream(StreamInterface* stream);
+
+private:
+  typedef std::pair<SocketAddress, StreamInterface*> ConnectedStream;
+  typedef std::list<ConnectedStream> ConnectedList;
+
+  void OnStreamEvent(StreamInterface* stream, int events, int err);
+
+  // We delegate stream creation and deletion to this pool.
+  StreamPool* pool_;
+  // Streams that are in use (returned from RequestConnectedStream).
+  ConnectedList active_;
+  // Streams which were returned to us, but are still open.
+  ConnectedList cached_;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// NewSocketPool
+// Creates a new stream on every request
+///////////////////////////////////////////////////////////////////////////////
+
+class NewSocketPool : public StreamPool {
+public:
+  NewSocketPool(SocketFactory* factory);
+  virtual ~NewSocketPool();
+  
+  // StreamPool Interface
+  virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
+                                                  int* err);
+  virtual void ReturnConnectedStream(StreamInterface* stream);
+  
+private:
+  SocketFactory* factory_;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// ReuseSocketPool
+// Maintains a single socket at a time, and will reuse it without closing if
+// the destination address is the same.
+///////////////////////////////////////////////////////////////////////////////
+
+class ReuseSocketPool : public StreamPool, public sigslot::has_slots<> {
+public:
+  ReuseSocketPool(SocketFactory* factory);
+  virtual ~ReuseSocketPool();
+
+  // StreamPool Interface
+  virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
+                                                  int* err);
+  virtual void ReturnConnectedStream(StreamInterface* stream);
+  
+private:
+  void OnStreamEvent(StreamInterface* stream, int events, int err);
+
+  SocketFactory* factory_;
+  SocketStream* stream_;
+  SocketAddress remote_;
+  bool checked_out_;  // Whether the stream is currently checked out
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// LoggingPoolAdapter - Adapts a StreamPool to supply streams with attached
+// LoggingAdapters.
+///////////////////////////////////////////////////////////////////////////////
+
+class LoggingPoolAdapter : public StreamPool {
+public:
+  LoggingPoolAdapter(StreamPool* pool, LoggingSeverity level,
+                     const std::string& label, bool binary_mode);
+  virtual ~LoggingPoolAdapter();
+
+  // StreamPool Interface
+  virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
+                                                  int* err);
+  virtual void ReturnConnectedStream(StreamInterface* stream);
+
+private:
+  StreamPool* pool_;
+  LoggingSeverity level_;
+  std::string label_;
+  bool binary_mode_;
+  typedef std::deque<LoggingAdapter*> StreamList;
+  StreamList recycle_bin_;
+};
+
+//////////////////////////////////////////////////////////////////////
+
+}  // namespace talk_base
+
+#endif  // TALK_BASE_SOCKETPOOL_H_