[NaCl SDK] Support non blocking TCP/UDP

native_client_sdk/src/libraries/nacl_io/mount_node_stream.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_STREAM_H_
+#define LIBRARIES_NACL_IO_MOUNT_NODE_STREAM_H_
+
+#include <map>
+#include <string>
+
+#include "nacl_io/event_emitter_pipe.h"
+#include "nacl_io/mount_node.h"
+#include "sdk_util/atomicops.h"
+
+namespace nacl_io {
+
+class MountNodeStream;
+class MountStream;
+
+typedef sdk_util::ScopedRef<MountNodeStream> ScopedMountNodeStream;
+
+enum StreamStateFlags {
+  SSF_CONNECTING = 0x0001,
+  SSF_SENDING = 0x0002,
+  SSF_RECVING = 0x0004,
+  SSF_CLOSING = 0x0008,
+  SSF_CAN_SEND = 0x0020,
+  SSF_CAN_RECV = 0x0040,
+  SSF_NON_BLOCK = 0x1000,
+  SSF_ERROR = 0x4000,
+  SSF_CLOSED = 0x8000
+};
+
+
+class MountNodeStream : public MountNode {
+ public:
+  explicit MountNodeStream(Mount* mnt);
+
+  virtual Error Init(int perm);
+
+  // Attempts to pump input and output
+  virtual void QueueInput();
+  virtual void QueueOutput();
+
+  void SetStreamFlags(uint32_t bits);
+  void ClearStreamFlags(uint32_t bits);
+  uint32_t GetStreamFlags();
+  bool TestStreamFlags(uint32_t bits);
+
+  MountStream* mount_stream();
+
+ protected:
+  int read_timeout_;
+  int write_timeout_;
+
+ private:
+  sdk_util::Atomic32 stream_state_flags_;
+};
+
+}  // namespace nacl_io
+
+#endif  // LIBRARIES_NACL_IO_MOUNT_NODE_STREAM_H_