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83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
#ifndef OBJC_SELECTOR_H_INCLUDED
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#define OBJC_SELECTOR_H_INCLUDED
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/**
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* Structure used to store the types for a selector. This allows for a quick
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* test to see whether a selector is polymorphic and allows enumeration of all
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* type encodings for a given selector.
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*
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* This is the same size as an objc_selector, so we can allocate them from the
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* objc_selector pool.
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*
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* Note: For ABI v10, we can probably do something a bit more sensible here and
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* make selectors into a linked list.
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*/
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struct sel_type_list
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{
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const char *value;
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struct sel_type_list *next;
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};
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/**
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* Structure used to store selectors in the list.
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*/
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struct objc_selector
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{
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union
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{
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/**
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* The name of this selector. Used for unregistered selectors.
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*/
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const char *name;
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/**
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* The index of this selector in the selector table. When a selector
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* is registered with the runtime, its name is replaced by an index
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* uniquely identifying this selector. The index is used for dispatch.
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*/
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uintptr_t index;
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};
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/**
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* The Objective-C type encoding of the message identified by this selector.
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*/
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const char * types;
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};
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/**
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* Returns the untyped variant of a selector.
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*/
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__attribute__((unused))
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static uint32_t get_untyped_idx(SEL aSel)
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{
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SEL untyped = sel_registerTypedName_np(sel_getName(aSel), 0);
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return untyped->index;
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}
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__attribute__((unused))
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static SEL sel_getUntyped(SEL aSel)
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{
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return sel_registerTypedName_np(sel_getName(aSel), 0);
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}
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/**
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* Returns whether a selector is mapped.
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*/
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BOOL isSelRegistered(SEL sel);
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/**
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* Registers the selector. This selector may be returned later, so it must not
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* be freed.
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*/
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SEL objc_register_selector(SEL aSel);
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/**
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* SELECTOR() macro to work around the fact that GCC hard-codes the type of
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* selectors. This is functionally equivalent to @selector(), but it ensures
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* that the selector has the type that the runtime uses for selectors.
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*/
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#ifdef __clang__
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#define SELECTOR(x) @selector(x)
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#else
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#define SELECTOR(x) (SEL)@selector(x)
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#endif
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#endif // OBJC_SELECTOR_H_INCLUDED
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