[NaCl SDK] Support non blocking TCP/UDP

native_client_sdk/src/libraries/nacl_io/packet.cc

+// 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.
+
+#include "nacl_io/packet.h"
+
+#include <string.h>
+
+#include "nacl_io/pepper_interface.h"
+
+namespace nacl_io {
+
+Packet::Packet(PepperInterface* ppapi)
+    : ppapi_(ppapi),
+      addr_(0),
+      buffer_(NULL),
+      len_(0) {}
+
+Packet:: ~Packet() {
+  if ((NULL != ppapi_) && addr_)
+    ppapi_->ReleaseResource(addr_);
+  delete[] buffer_;
+}
+
+void Packet::Take(const void *buffer, size_t len, PP_Resource addr) {
+  addr_ = addr;
+  len_ = len;
+  buffer_ = static_cast<char*>(const_cast<void*>(buffer));
+}
+
+void Packet::Copy(const void *buffer, size_t len, PP_Resource addr) {
+  addr_ = addr;
+  len_ = len;
+  buffer_ = new char[len];
+
+  memcpy(buffer_, buffer, len);
+  if (addr && (NULL != ppapi_))
+    ppapi_->AddRefResource(addr);
+}
+
+}  // namespace nacl_io