mirror of
https://github.com/ziglang/zig.git
synced 2025-12-10 08:13:07 +00:00
5b813f1a2a
Prior to this change we would assume the ABI for Apple targets to be GNU which could result in subtle errors in LLVM emitting calls to non-existent system libc provided functions such as `_sincosf` which is a GNU extension and as such is not provided by macOS for example. This would result in linker errors where the linker would not be able to find the said symbol in `libSystem.tbd`. With this change, we now correctly identify macOS (and other Apple platforms) as having ABI `unknown` which translates to unspecified in LLVM under-the-hood: ``` // main.ll target triple = "aarch64-unknown-macos-unknown" ``` Note however that we never suffix the target OS with target version such as `macos11` or `macos12` which means we fail to instruct LLVM of potential optimisations provided by the OS such as the availability of function `___sincosf_stret`. I suggest we investigate that in a follow-up commit.
271 lines
8.4 KiB
Objective-C
Vendored
271 lines
8.4 KiB
Objective-C
Vendored
/*
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* Copyright (c) 2011-2014 Apple Inc. All rights reserved.
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*
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* @APPLE_APACHE_LICENSE_HEADER_START@
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @APPLE_APACHE_LICENSE_HEADER_END@
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*/
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#ifndef __OS_OBJECT__
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#define __OS_OBJECT__
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#ifdef __APPLE__
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#include <Availability.h>
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#include <os/availability.h>
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#include <TargetConditionals.h>
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#include <os/base.h>
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#elif defined(_WIN32)
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#include <os/generic_win_base.h>
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#elif defined(__unix__)
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#include <os/generic_unix_base.h>
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#endif
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/*!
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* @header
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*
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* @preprocinfo
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* By default, libSystem objects such as GCD and XPC objects are declared as
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* Objective-C types when building with an Objective-C compiler. This allows
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* them to participate in ARC, in RR management by the Blocks runtime and in
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* leaks checking by the static analyzer, and enables them to be added to Cocoa
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* collections.
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*
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* NOTE: this requires explicit cancellation of dispatch sources and xpc
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* connections whose handler blocks capture the source/connection object,
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* resp. ensuring that such captures do not form retain cycles (e.g. by
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* declaring the source as __weak).
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*
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* To opt-out of this default behavior, add -DOS_OBJECT_USE_OBJC=0 to your
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* compiler flags.
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*
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* This mode requires a platform with the modern Objective-C runtime, the
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* Objective-C GC compiler option to be disabled, and at least a Mac OS X 10.8
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* or iOS 6.0 deployment target.
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*/
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#ifndef OS_OBJECT_HAVE_OBJC_SUPPORT
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#if !defined(__OBJC__) || defined(__OBJC_GC__)
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# define OS_OBJECT_HAVE_OBJC_SUPPORT 0
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#elif !defined(TARGET_OS_MAC) || !TARGET_OS_MAC
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# define OS_OBJECT_HAVE_OBJC_SUPPORT 0
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#elif TARGET_OS_IOS && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0
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# define OS_OBJECT_HAVE_OBJC_SUPPORT 0
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#elif TARGET_OS_MAC && !TARGET_OS_IPHONE
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# if __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_8
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# define OS_OBJECT_HAVE_OBJC_SUPPORT 0
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# elif defined(__i386__) && __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_12
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# define OS_OBJECT_HAVE_OBJC_SUPPORT 0
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# else
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# define OS_OBJECT_HAVE_OBJC_SUPPORT 1
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# endif
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#else
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# define OS_OBJECT_HAVE_OBJC_SUPPORT 1
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#endif
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#endif // OS_OBJECT_HAVE_OBJC_SUPPORT
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#if OS_OBJECT_HAVE_OBJC_SUPPORT
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#if defined(__swift__) && __swift__ && !OS_OBJECT_USE_OBJC
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#define OS_OBJECT_USE_OBJC 1
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#endif
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#ifndef OS_OBJECT_USE_OBJC
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#define OS_OBJECT_USE_OBJC 1
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#endif
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#elif defined(OS_OBJECT_USE_OBJC) && OS_OBJECT_USE_OBJC
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/* Unsupported platform for OS_OBJECT_USE_OBJC=1 */
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#undef OS_OBJECT_USE_OBJC
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#define OS_OBJECT_USE_OBJC 0
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#else
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#define OS_OBJECT_USE_OBJC 0
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#endif
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#ifndef OS_OBJECT_SWIFT3
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#ifdef __swift__
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#define OS_OBJECT_SWIFT3 1
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#else // __swift__
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#define OS_OBJECT_SWIFT3 0
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#endif // __swift__
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#endif // OS_OBJECT_SWIFT3
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#if OS_OBJECT_USE_OBJC
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#import <objc/NSObject.h>
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#if __has_attribute(objc_independent_class)
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#define OS_OBJC_INDEPENDENT_CLASS __attribute__((objc_independent_class))
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#endif // __has_attribute(objc_independent_class)
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#ifndef OS_OBJC_INDEPENDENT_CLASS
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#define OS_OBJC_INDEPENDENT_CLASS
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#endif
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#define OS_OBJECT_CLASS(name) OS_##name
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#define OS_OBJECT_DECL_PROTOCOL(name, ...) \
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@protocol OS_OBJECT_CLASS(name) __VA_ARGS__ \
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@end
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#define OS_OBJECT_CLASS_IMPLEMENTS_PROTOCOL_IMPL(name, proto) \
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@interface name () <proto> \
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@end
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#define OS_OBJECT_CLASS_IMPLEMENTS_PROTOCOL(name, proto) \
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OS_OBJECT_CLASS_IMPLEMENTS_PROTOCOL_IMPL( \
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OS_OBJECT_CLASS(name), OS_OBJECT_CLASS(proto))
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#define OS_OBJECT_DECL_IMPL(name, ...) \
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OS_OBJECT_DECL_PROTOCOL(name, __VA_ARGS__) \
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typedef NSObject<OS_OBJECT_CLASS(name)> \
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* OS_OBJC_INDEPENDENT_CLASS name##_t
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#define OS_OBJECT_DECL_BASE(name, ...) \
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@interface OS_OBJECT_CLASS(name) : __VA_ARGS__ \
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- (instancetype)init OS_SWIFT_UNAVAILABLE("Unavailable in Swift"); \
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@end
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#define OS_OBJECT_DECL_IMPL_CLASS(name, ...) \
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OS_OBJECT_DECL_BASE(name, ## __VA_ARGS__) \
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typedef OS_OBJECT_CLASS(name) \
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* OS_OBJC_INDEPENDENT_CLASS name##_t
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#define OS_OBJECT_DECL(name, ...) \
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OS_OBJECT_DECL_IMPL(name, <NSObject>)
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#define OS_OBJECT_DECL_SUBCLASS(name, super) \
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OS_OBJECT_DECL_IMPL(name, <OS_OBJECT_CLASS(super)>)
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#if __has_attribute(ns_returns_retained)
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#define OS_OBJECT_RETURNS_RETAINED __attribute__((__ns_returns_retained__))
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#else
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#define OS_OBJECT_RETURNS_RETAINED
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#endif
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#if __has_attribute(ns_consumed)
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#define OS_OBJECT_CONSUMED __attribute__((__ns_consumed__))
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#else
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#define OS_OBJECT_CONSUMED
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#endif
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#if __has_feature(objc_arc)
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#define OS_OBJECT_BRIDGE __bridge
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#define OS_WARN_RESULT_NEEDS_RELEASE
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#else
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#define OS_OBJECT_BRIDGE
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#define OS_WARN_RESULT_NEEDS_RELEASE OS_WARN_RESULT
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#endif
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#if __has_attribute(objc_runtime_visible) && \
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((defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \
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__MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_12) || \
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(defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && \
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!defined(__TV_OS_VERSION_MIN_REQUIRED) && \
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!defined(__WATCH_OS_VERSION_MIN_REQUIRED) && \
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__IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_10_0) || \
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(defined(__TV_OS_VERSION_MIN_REQUIRED) && \
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__TV_OS_VERSION_MIN_REQUIRED < __TVOS_10_0) || \
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(defined(__WATCH_OS_VERSION_MIN_REQUIRED) && \
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__WATCH_OS_VERSION_MIN_REQUIRED < __WATCHOS_3_0))
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/*
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* To provide backward deployment of ObjC objects in Swift on pre-10.12
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* SDKs, OS_object classes can be marked as OS_OBJECT_OBJC_RUNTIME_VISIBLE.
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* When compiling with a deployment target earlier than OS X 10.12 (iOS 10.0,
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* tvOS 10.0, watchOS 3.0) the Swift compiler will only refer to this type at
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* runtime (using the ObjC runtime).
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*/
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#define OS_OBJECT_OBJC_RUNTIME_VISIBLE __attribute__((objc_runtime_visible))
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#else
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#define OS_OBJECT_OBJC_RUNTIME_VISIBLE
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#endif
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#ifndef OS_OBJECT_USE_OBJC_RETAIN_RELEASE
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#if defined(__clang_analyzer__)
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#define OS_OBJECT_USE_OBJC_RETAIN_RELEASE 1
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#elif __has_feature(objc_arc) && !OS_OBJECT_SWIFT3
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#define OS_OBJECT_USE_OBJC_RETAIN_RELEASE 1
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#else
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#define OS_OBJECT_USE_OBJC_RETAIN_RELEASE 0
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#endif
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#endif
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#if OS_OBJECT_SWIFT3
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#define OS_OBJECT_DECL_SWIFT(name) \
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OS_EXPORT OS_OBJECT_OBJC_RUNTIME_VISIBLE \
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OS_OBJECT_DECL_IMPL_CLASS(name, NSObject)
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#define OS_OBJECT_DECL_SUBCLASS_SWIFT(name, super) \
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OS_EXPORT OS_OBJECT_OBJC_RUNTIME_VISIBLE \
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OS_OBJECT_DECL_IMPL_CLASS(name, OS_OBJECT_CLASS(super))
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OS_EXPORT OS_OBJECT_OBJC_RUNTIME_VISIBLE
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OS_OBJECT_DECL_BASE(object, NSObject);
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#endif // OS_OBJECT_SWIFT3
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#else
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/*! @parseOnly */
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#define OS_OBJECT_RETURNS_RETAINED
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/*! @parseOnly */
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#define OS_OBJECT_CONSUMED
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/*! @parseOnly */
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#define OS_OBJECT_BRIDGE
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/*! @parseOnly */
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#define OS_WARN_RESULT_NEEDS_RELEASE OS_WARN_RESULT
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/*! @parseOnly */
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#define OS_OBJECT_OBJC_RUNTIME_VISIBLE
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#define OS_OBJECT_USE_OBJC_RETAIN_RELEASE 0
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#endif
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#if OS_OBJECT_SWIFT3
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#define OS_OBJECT_DECL_CLASS(name) \
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OS_OBJECT_DECL_SUBCLASS_SWIFT(name, object)
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#elif OS_OBJECT_USE_OBJC
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#define OS_OBJECT_DECL_CLASS(name) \
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OS_OBJECT_DECL(name)
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#else
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#define OS_OBJECT_DECL_CLASS(name) \
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typedef struct name##_s *name##_t
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#endif
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#define OS_OBJECT_GLOBAL_OBJECT(type, object) ((OS_OBJECT_BRIDGE type)&(object))
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__BEGIN_DECLS
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/*!
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* @function os_retain
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*
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* @abstract
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* Increment the reference count of an os_object.
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*
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* @discussion
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* On a platform with the modern Objective-C runtime this is exactly equivalent
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* to sending the object the -[retain] message.
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*
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* @param object
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* The object to retain.
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*
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* @result
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* The retained object.
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*/
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API_AVAILABLE(macos(10.10), ios(8.0))
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OS_EXPORT OS_SWIFT_UNAVAILABLE("Can't be used with ARC")
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void*
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os_retain(void *object);
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#if OS_OBJECT_USE_OBJC
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#undef os_retain
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#define os_retain(object) [object retain]
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#endif
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/*!
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* @function os_release
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*
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* @abstract
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* Decrement the reference count of a os_object.
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*
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* @discussion
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* On a platform with the modern Objective-C runtime this is exactly equivalent
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* to sending the object the -[release] message.
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*
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* @param object
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* The object to release.
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*/
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API_AVAILABLE(macos(10.10), ios(8.0))
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OS_EXPORT
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void OS_SWIFT_UNAVAILABLE("Can't be used with ARC")
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os_release(void *object);
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#if OS_OBJECT_USE_OBJC
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#undef os_release
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#define os_release(object) [object release]
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#endif
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__END_DECLS
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#endif |