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7eff49c1b6
Most SwiftShims were put in the swift namespace in C++ mode which broke certain things when importing them in a swift file in C++ mode. This was OK when they were only imported as part of the swift runtime but, now they are used in C++ mode both in the swift runtime and when C++ interop is enabled. This broke when C++ interop was enabled because the `Swift` module contains references to symbols in the SwiftShims headers which are built without C++ interop enabled (no "swift" namespace). But, when C++ interop is enabled, the SwiftShims headers would put everything in the swift namespace meaning the symbols couldn't be found in the global namespace. Then, the compiler would error when trying to deserialize the Swift module.
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
//===--- BackDeployment.cpp - Support for running on older OS versions. ---===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Runtime/BackDeployment.h"
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#include "swift/Runtime/Config.h"
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#include "../SwiftShims/FoundationShims.h"
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#include <stdlib.h>
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#if defined(__APPLE__) && defined(__MACH__)
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#if SWIFT_CLASS_IS_SWIFT_MASK_GLOBAL_VARIABLE
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static unsigned long long computeIsSwiftMask() {
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if (swift::_swift_isBackDeploying())
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return 1ULL;
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return 2ULL;
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}
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_BEGIN
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extern "C" unsigned long long
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_swift_classIsSwiftMask = computeIsSwiftMask();
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_END
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#endif // SWIFT_CLASS_IS_SWIFT_MASK_GLOBAL_VARIABLE
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static _SwiftNSOperatingSystemVersion swiftInOSVersion = {
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#if __MAC_OS_X_VERSION_MIN_REQUIRED
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10, 14, 4
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// WatchOS also pretends to be iOS, so check it first.
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#elif __WATCH_OS_VERSION_MIN_REQUIRED
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5, 2, 0
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#elif __IPHONE_OS_VERSION_MIN_REQUIRED || __TV_OS_VERSION_MIN_REQUIRED
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12, 2, 0
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#else
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9999, 0, 0
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#endif
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};
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static bool versionLessThan(_SwiftNSOperatingSystemVersion lhs,
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_SwiftNSOperatingSystemVersion rhs) {
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if (lhs.majorVersion < rhs.majorVersion) return true;
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if (lhs.majorVersion > rhs.majorVersion) return false;
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if (lhs.minorVersion < rhs.minorVersion) return true;
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if (lhs.minorVersion > rhs.minorVersion) return false;
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if (lhs.patchVersion < rhs.patchVersion) return true;
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return false;
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}
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SWIFT_RUNTIME_STDLIB_INTERNAL
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int _swift_isBackDeploying() {
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auto version = _swift_stdlib_operatingSystemVersion();
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return versionLessThan(version, swiftInOSVersion);
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}
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#endif
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