Add support for native ports in the vm.

runtime/include/dart_api.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
  *
  * Dart is a class-based programming language for creating structured
@@ skipping 504 matching lines @@
  * Requires there to be a current isolate.
  *
  * \param port The destination port.
  * \param object An object from the current isolate.
  *
  * \return True if the message was posted.
  */
 DART_EXPORT bool Dart_Post(Dart_Port port_id, Dart_Handle object);
 
 /**
+ * A native message handler.
+ *
+ * This handler is associated with a native port by calling
+ * Dart_NewNativePort.
+ */
+typedef void (*Dart_NativeMessageHandler)(Dart_Port dest_port_id,
+                                          Dart_Port reply_port_id,
+                                          uint8_t* data);
+// TODO(turnidge): Make this function take more appropriate arguments.
+
+/**
+ * Creates a new native port.  When messages are received on this
+ * native port, then they will be dispatched to the provided native
+ * message handler.
+ *
+ * \param name The name of this port in debugging messages.
+ * \param handler The C handler to run when messages arrive on the port.
+ * \param handle_concurrently Is it okay to process requests on this
+ *                            native port concurrently?
+ *
+ * \return A port id for the native port.
+ */
+DART_EXPORT Dart_Port Dart_NewNativePort(const char* name,
+                                         Dart_NativeMessageHandler handler,
+                                         bool handle_concurrently);
+// TODO(turnidge): Currently allow_concurrent is ignored.

[siva, 2012/02/01 00:38:56]

Currently handle_concurrently is ignored.

[turnidge, 2012/02/01 18:51:27]

Done.

+
+/**
+ * Closes the native port with the given id.
+ *
+ * The port must have been allocated by a call to Dart_NewNativePort.
+ *
+ * \param native_port_id The id of the native port to close.
+ *
+ * \return Returns true if the port was closed successfully.
+ */
+DART_EXPORT bool Dart_CloseNativePort(Dart_Port native_port_id);
+
+/**
  * Returns a new SendPort with the provided port id.
  */
 DART_EXPORT Dart_Handle Dart_NewSendPort(Dart_Port port_id);
 
 /**
  * Gets the ReceivePort for the provided port id, creating it if necessary.
  *
  * Note that there is at most one ReceivePort for a given port id.
  */
 DART_EXPORT Dart_Handle Dart_GetReceivePort(Dart_Port port_id);
@@ skipping 856 matching lines @@
 };
 
 /**
  * A Dart_CMessage is used for encoding and decoding messages from native code.
  */
 struct Dart_CMessage {
   Dart_CObject** message;
 };
 
 #endif  // INCLUDE_DART_API_H_