mirror of
https://github.com/SoPat712/YTLitePlus.git
synced 2025-11-01 21:23:38 -04:00
74 lines
2.0 KiB
Objective-C
74 lines
2.0 KiB
Objective-C
//
|
|
// FLEXObjcInternal.h
|
|
// FLEX
|
|
//
|
|
// Created by Tanner Bennett on 11/1/18.
|
|
//
|
|
|
|
#import <Foundation/Foundation.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// The macros below are copied straight from
|
|
// objc-internal.h, objc-private.h, objc-object.h, and objc-config.h with
|
|
// as few modifications as possible. Changes are noted in boxed comments.
|
|
// https://opensource.apple.com/source/objc4/objc4-723/
|
|
// https://opensource.apple.com/source/objc4/objc4-723/runtime/objc-internal.h.auto.html
|
|
// https://opensource.apple.com/source/objc4/objc4-723/runtime/objc-object.h.auto.html
|
|
|
|
/////////////////////
|
|
// objc-internal.h //
|
|
/////////////////////
|
|
|
|
#if __LP64__
|
|
#define OBJC_HAVE_TAGGED_POINTERS 1
|
|
#endif
|
|
|
|
#if OBJC_HAVE_TAGGED_POINTERS
|
|
|
|
#if TARGET_OS_OSX && __x86_64__
|
|
// 64-bit Mac - tag bit is LSB
|
|
# define OBJC_MSB_TAGGED_POINTERS 0
|
|
#else
|
|
// Everything else - tag bit is MSB
|
|
# define OBJC_MSB_TAGGED_POINTERS 1
|
|
#endif
|
|
|
|
#if OBJC_MSB_TAGGED_POINTERS
|
|
# define _OBJC_TAG_MASK (1UL<<63)
|
|
# define _OBJC_TAG_EXT_MASK (0xfUL<<60)
|
|
#else
|
|
# define _OBJC_TAG_MASK 1UL
|
|
# define _OBJC_TAG_EXT_MASK 0xfUL
|
|
#endif
|
|
|
|
#endif // OBJC_HAVE_TAGGED_POINTERS
|
|
|
|
//////////////////////////////////////
|
|
// originally _objc_isTaggedPointer //
|
|
//////////////////////////////////////
|
|
NS_INLINE BOOL flex_isTaggedPointer(const void *ptr) {
|
|
#if OBJC_HAVE_TAGGED_POINTERS
|
|
return ((uintptr_t)ptr & _OBJC_TAG_MASK) == _OBJC_TAG_MASK;
|
|
#else
|
|
return NO;
|
|
#endif
|
|
}
|
|
|
|
#define FLEXPointerIsTaggedPointer(obj) flex_isTaggedPointer((__bridge void *)obj)
|
|
|
|
BOOL FLEXPointerIsReadable(const void * ptr);
|
|
|
|
/// @brief Assumes memory is valid and readable.
|
|
/// @discussion objc-internal.h, objc-private.h, and objc-config.h
|
|
/// https://blog.timac.org/2016/1124-testing-if-an-arbitrary-pointer-is-a-valid-objective-c-object/
|
|
/// https://llvm.org/svn/llvm-project/lldb/trunk/examples/summaries/cocoa/objc_runtime.py
|
|
/// https://blog.timac.org/2016/1124-testing-if-an-arbitrary-pointer-is-a-valid-objective-c-object/
|
|
BOOL FLEXPointerIsValidObjcObject(const void * ptr);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|