RTCMacros.h - mozsearch

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/*

 *  Copyright 2016 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 SDK_OBJC_BASE_RTCMACROS_H_

#define SDK_OBJC_BASE_RTCMACROS_H_

#ifdef WEBRTC_ENABLE_OBJC_SYMBOL_EXPORT

#if defined(WEBRTC_LIBRARY_IMPL)

#define RTC_OBJC_EXPORT __attribute__((visibility("default")))

#endif

#endif  // WEBRTC_ENABLE_OBJC_SYMBOL_EXPORT

#ifndef RTC_OBJC_EXPORT

#define RTC_OBJC_EXPORT

#endif

// Macro used to mark a function as deprecated.

#define RTC_OBJC_DEPRECATED(msg) __attribute__((deprecated(msg)))

// Internal macros used to correctly concatenate symbols.

#define RTC_SYMBOL_CONCAT_HELPER(a, b) a##b

#define RTC_SYMBOL_CONCAT(a, b) RTC_SYMBOL_CONCAT_HELPER(a, b)

// RTC_OBJC_TYPE_PREFIX

//

// Macro used to prepend a prefix to the API types that are exported with

// RTC_OBJC_EXPORT.

//

// Clients can patch the definition of this macro locally and build

// WebRTC.framework with their own prefix in case symbol clashing is a

// problem.

//

// This macro must be defined uniformily across all the translation units.

#ifndef RTC_OBJC_TYPE_PREFIX

#define RTC_OBJC_TYPE_PREFIX

#endif

// RCT_OBJC_TYPE

//

// Macro used internally to declare API types. Declaring an API type without

// using this macro will not include the declared type in the set of types

// that will be affected by the configurable RTC_OBJC_TYPE_PREFIX.

#define RTC_OBJC_TYPE(type_name) RTC_SYMBOL_CONCAT(RTC_OBJC_TYPE_PREFIX, type_name)

#if defined(__cplusplus)

#define RTC_EXTERN extern "C" RTC_OBJC_EXPORT

#else

#define RTC_EXTERN extern RTC_OBJC_EXPORT

#endif

#ifdef __OBJC__

#define RTC_FWD_DECL_OBJC_CLASS(classname) @class classname

#else

#define RTC_FWD_DECL_OBJC_CLASS(classname) typedef struct objc_object classname

#endif

#endif  // SDK_OBJC_BASE_RTCMACROS_H_