| //===--- BackDeployment.h - Support for running on older OS versions. -----===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors |
| // Licensed under Apache License v2.0 with Runtime Library Exception |
| // |
| // See https://swift.org/LICENSE.txt for license information |
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef SWIFT_STDLIB_BACKDEPLOYMENT_H |
| #define SWIFT_STDLIB_BACKDEPLOYMENT_H |
| |
| #if defined(__APPLE__) && defined(__MACH__) |
| |
| #include "swift/Runtime/Config.h" |
| #include "../../../stdlib/public/SwiftShims/Visibility.h" |
| |
| #ifdef __cplusplus |
| namespace swift { extern "C" { |
| #endif |
| |
| #if SWIFT_CLASS_IS_SWIFT_MASK_GLOBAL_VARIABLE |
| # ifndef __cplusplus |
| // This file gets included from some C/ObjC files and |
| // SWIFT_RUNTIME_STDLIB_SPI doesn't imply extern in C. |
| extern |
| # endif |
| SWIFT_RUNTIME_STDLIB_SPI unsigned long long _swift_classIsSwiftMask; |
| #endif |
| |
| /// Returns true if the current OS version, at runtime, is a back-deployment |
| /// version. |
| SWIFT_RUNTIME_STDLIB_INTERNAL |
| int _swift_isBackDeploying(); |
| |
| #ifdef __cplusplus |
| }} // extern "C", namespace swift |
| #endif |
| |
| #endif // defined(__APPLE__) && defined(__MACH__) |
| |
| #endif // SWIFT_STDLIB_BACKDEPLOYMENT_H |
