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21ac407a21
Added SWIFT_RUNTIME_WEAK_IMPORT/CHECK/USE macros. Everything supports fast dealloc except x86 iOS simulators, so we no longer need to look up objc_has_weak_formation_callout. Added direct references for objc_setHook_lazyClassNamer _objc_realizeClassFromSwift objc_setHook_getClass os_system_version_get_current_version _dyld_is_objc_constant
55 lines
1.9 KiB
Plaintext
55 lines
1.9 KiB
Plaintext
//===--- Availability.mm - Swift Language API Availability Support --------===//
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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 - 2017 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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//
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// Implementation of run-time API availability queries.
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Runtime/Config.h"
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#if SWIFT_OBJC_INTEROP && defined(SWIFT_RUNTIME_OS_VERSIONING)
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#include "swift/Basic/Lazy.h"
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#include "swift/Runtime/Debug.h"
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#include <TargetConditionals.h>
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#include "../SwiftShims/FoundationShims.h"
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struct os_system_version_s {
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unsigned int major;
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unsigned int minor;
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unsigned int patch;
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};
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// This is in libSystem, so it's OK to refer to it directly here
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extern "C" int os_system_version_get_current_version(struct os_system_version_s * _Nonnull) SWIFT_RUNTIME_WEAK_IMPORT;
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static os_system_version_s getOSVersion() {
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struct os_system_version_s vers = { 0, 0, 0 };
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os_system_version_get_current_version(&vers);
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return vers;
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}
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using namespace swift;
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/// Return the version of the operating system currently running for use in
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/// API availability queries.
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///
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/// This is ABI and cannot be removed. Even though _stdlib_isOSVersionAtLeast()
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/// is no longer inlinable, is previously was and so calls to this method
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/// have been inlined into shipped apps.
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_SwiftNSOperatingSystemVersion _swift_stdlib_operatingSystemVersion() {
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os_system_version_s version = SWIFT_LAZY_CONSTANT(getOSVersion());
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return { (int)version.major, (int)version.minor, (int)version.patch };
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}
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#endif
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