1 files changed, 87 insertions, 0 deletions
diff --git a/host/windows/usb/api/adb_winusb_io_completion.cpp b/host/windows/usb/api/adb_winusb_io_completion.cpp
new file mode 100755
index 000000000..baeb7bbb8
--- /dev/null
+++ b/host/windows/usb/api/adb_winusb_io_completion.cpp
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+/** \file
+  This file consists of implementation of class AdbWinUsbIOCompletion that
+  encapsulates a wrapper around OVERLAPPED Win32 structure returned from
+  asynchronous I/O requests issued via WinUsb API.
+*/
+
+#include "stdafx.h"
+#include "adb_winusb_io_completion.h"
+
+AdbWinUsbIOCompletion::AdbWinUsbIOCompletion(
+    AdbWinUsbEndpointObject* parent_io_obj,
+    ULONG expected_trans_size,
+    HANDLE event_hndl)
+    : AdbIOCompletion(parent_io_obj, expected_trans_size, event_hndl) {
+}
+
+AdbWinUsbIOCompletion::~AdbWinUsbIOCompletion() {
+}
+
+bool AdbWinUsbIOCompletion::GetOvelappedIoResult(LPOVERLAPPED ovl_data,
+                                                 ULONG* bytes_transferred,
+                                                 bool wait) {
+  if (NULL != bytes_transferred) {
+    *bytes_transferred = 0;
+  }
+
+  if (!IsOpened()) {
+    SetLastError(ERROR_INVALID_HANDLE);
+    return false;
+  }
+
+  ULONG transfer;
+  bool ret = WinUsb_GetOverlappedResult(
+                  parent_winusb_io_object()->winusb_handle(),
+                  overlapped(),
+                  &transfer,
+                  wait ? TRUE : FALSE) ? true : false;
+
+  // TODO: This is bizzare but I've seen it happening
+  // that GetOverlappedResult with wait set to true returns "prematurely",
+  // with wrong transferred bytes value and GetLastError reporting
+  // ERROR_IO_PENDING. So, lets give it an up to a 20 ms loop!
+  ULONG error = GetLastError();
+
+  if (wait && ret && (0 == transfer) && (0 != expected_transfer_size_) &&
+      ((ERROR_IO_INCOMPLETE == error) || (ERROR_IO_PENDING == error))) {
+    for (int trying = 0; trying < 10; trying++) {
+      Sleep(2);
+      ret = WinUsb_GetOverlappedResult(
+                parent_winusb_io_object()->winusb_handle(),
+                overlapped(),
+                &transfer,
+                wait ? TRUE : FALSE) ? true : false;
+      error = GetLastError();
+      if (!ret || (0 != transfer) ||
+          ((ERROR_IO_INCOMPLETE != error) && (ERROR_IO_PENDING != error))) {
+        break;
+      }
+    }
+  }
+
+  if (NULL != ovl_data) {
+    CopyMemory(ovl_data, overlapped(), sizeof(OVERLAPPED));
+  }
+
+  if (NULL != bytes_transferred) {
+    *bytes_transferred = transfer;
+  }
+
+  return ret;
+}