[NaCl SDK] Support non blocking TCP/UDP

native_client_sdk/src/libraries/nacl_io/mount_node_udp.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LIBRARIES_NACL_IO_MOUNT_NODE_UDP_H_
 #define LIBRARIES_NACL_IO_MOUNT_NODE_UDP_H_
 
 #include "nacl_io/ossocket.h"
 #ifdef PROVIDES_SOCKET_API
 
 #include <ppapi/c/pp_resource.h>
 #include <ppapi/c/ppb_udp_socket.h>
 
+#include "nacl_io/event_emitter_udp.h"
 #include "nacl_io/mount_node.h"
 #include "nacl_io/mount_node_socket.h"
 
 namespace nacl_io {
 
+class UDPSendWork;
+class UDPRecvWork;
+
 class MountNodeUDP : public MountNodeSocket {
  public:
   explicit MountNodeUDP(Mount* mount);
 
+ protected:
   virtual Error Init(int flags);
+  virtual void Destroy();
+
+ public:
+  virtual EventEmitterUDP* GetEventEmitter();
+
+  virtual void QueueInput();
+  virtual void QueueOutput();
+
 
   virtual Error Bind(const struct sockaddr* addr, socklen_t len);
   virtual Error Connect(const struct sockaddr* addr, socklen_t len);
 
   virtual Error Recv(void* buf, size_t len, int flags, int* out_len);
   virtual Error RecvFrom(void* buf,
                          size_t len,
                          int flags,
                          struct sockaddr* src_addr,
                          socklen_t* addrlen,
                          int* out_len);
 
   virtual Error Send(const void* buf, size_t len, int flags, int* out_len);
   virtual Error SendTo(const void* buf,
                        size_t len,
                        int flags,
                        const struct sockaddr* dest_addr,
                        socklen_t addrlen,
                        int* out_len);
 
  protected:
-  UDPSocketInterface* UDPSocket();
-
   Error RecvFromHelper(void* buf,
                        size_t len,
                        int flags,
                        PP_Resource* addr,
                        int* out_len);
 
   Error SendToHelper(const void* buf,
                      size_t len,
                      int flags,
                      PP_Resource dest_addr,
                      int* out_len);
+
+  ScopedEventEmitterUDP emitter_;
+  friend class UDPSendWork;
+  friend class UDPRecvWork;
 };
 
 
 }  // namespace nacl_io
 
 #endif  // PROVIDES_SOCKET_API
 #endif  // LIBRARIES_NACL_IO_MOUNT_NODE_UDP_H_