Cleanup of iOS AudioDevice implementation

webrtc/modules/utility/interface/helpers_ios.h

+/*
+ *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_UTILITY_INTERFACE_HELPERS_IOS_H_
+#define WEBRTC_MODULES_UTILITY_INTERFACE_HELPERS_IOS_H_
+
+#if defined(WEBRTC_IOS)
+
+#include <string>
+
+namespace webrtc {
+namespace ios {
+
+bool CheckAndLogError(BOOL success, NSError* error);
+
+// Return thread ID as a string.
+std::string GetThreadId();
+
+// Return thread ID as string suitable for debug logging.
+std::string GetThreadInfo();
+
+// Returns [NSThread currentThread] description as string.
+// Example: <NSThread: 0x170066d80>{number = 1, name = main}
+std::string GetCurrentThreadDescription();
+
+AVAudioSession* GetAudioSession();
+
+}  // namespace ios
+}  // namespace webrtc
+
+#endif  // defined(WEBRTC_IOS)
+
+#endif  // WEBRTC_MODULES_UTILITY_INTERFACE_HELPERS_IOS_H_