[NaCl SDK] Support non blocking TCP/UDP

native_client_sdk/src/libraries/nacl_io/packet.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_PACKET_H_
+#define LIBRARIES_NACL_IO_PACKET_H_
+
+#include "nacl_io/fifo_interface.h"
+#include "ppapi/c/pp_resource.h"
+
+#include "sdk_util/macros.h"
+
+namespace nacl_io {
+
+class PepperInterface;
+
+// NOTE: The Packet class always owns the buffer and address, either by 'Copy'
+// or by 'Take' ownership.
+class Packet {
+ public:
+  explicit Packet(PepperInterface* ppapi);
+  ~Packet();
+
+  // Copy the buffer, and address reference
+  void Copy(const void *buffer, size_t len, PP_Resource addr);
+
+  // Take ownership the buffer, and address reference
+  void Take(const void *buffer, size_t len, PP_Resource addr);
+
+  char* buffer() { return buffer_; }
+  PP_Resource addr() { return addr_; }
+  size_t len() { return len_; }
+
+ private:
+  PepperInterface* ppapi_;
+  PP_Resource addr_;
+  char* buffer_;
+  size_t len_;
+
+  DISALLOW_COPY_AND_ASSIGN(Packet);
+};
+
+}  // namespace nacl_io
+
+#endif  // LIBRARIES_NACL_IO_PACKET_H_