Introduce asynchronous operation helpers.

<android/async-utils.h> contains generic helpers to read, write
and connect to sockets.

<android/async-console.h> contains a helper class to connect
to Android console port asynchronously.

Change-Id: I5d0a49a770ad974c5d4382438d75e9eb624368d1

1 files changed, 63 insertions, 0 deletions

diff --git a/android/async-console.h b/android/async-console.h
new file mode 100644
index 0000000..6779ae2
--- /dev/null
+++ b/android/async-console.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef ANDROID_ASYNC_CONSOLE_H
+#define ANDROID_ASYNC_CONSOLE_H
+
+#include "android/async-utils.h"
+
+/* An AsyncConsoleConnector allows you to asynchronously connect to an
+ * Android console port.
+ */
+typedef struct {
+    int              state;
+    int              error;
+    LoopIo*          io;
+    SockAddress      address;
+    AsyncConnector   connector[1];
+    AsyncLineReader  lreader[1];
+    uint8_t          lbuff[128];
+} AsyncConsoleConnector;
+
+/* Initialize the console connector. This attempts to connect to the address
+ * provided through 'io'. Use asyncConsoleConnect_run() after that.
+ */
+AsyncStatus
+asyncConsoleConnector_connect(AsyncConsoleConnector* acc,
+                              const SockAddress*     address,
+                              LoopIo*                io);
+
+/* Asynchronous console connection management. Returns:
+ *
+ * ASYNC_COMPLETE:
+ *    Connection was complete, and the console banner was properly read/eaten.
+ *    you can now send/write commands through the console with 'io'.
+ *
+ * ASYNC_ERROR:
+ *    An error occured, either during the connection itself, or when
+ *    reading the content. This sets errno to ENOPROTOOPT if the connector
+ *    detects that you're not connected to a proper Android emulator console
+ *    port (i.e. if the banner was incorrect). Other errors are possible
+ *    (e.g. in case of early connection termination).
+ *
+ * ASYNC_NEED_MORE:
+ *     Not enough data was exchanged, call this function later.
+ */
+AsyncStatus
+asyncConsoleConnector_run(AsyncConsoleConnector* acc,
+                          LoopIo*                io);
+
+
+#endif /* ANDROID_ASYNC_CONSOLE_H */