mirror of
https://github.com/darlinghq/darling-libobjc2.git
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f845df37c1
that are accessed by libdispatch. Also rename the relevant structs to be compatible with the BlocksRuntime from compiler-rt.
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/**
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* Block descriptor flags.
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*/
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enum block_flags
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{
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/**
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* The block descriptor contains copy and dispose helpers.
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*/
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BLOCK_HAS_COPY_DISPOSE = (1 << 25),
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/**
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* The helpers have C++ code.
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*/
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BLOCK_HAS_CTOR = (1 << 26),
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/**
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* Block is stored in global memory and does not need to be copied.
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*/
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BLOCK_IS_GLOBAL = (1 << 28),
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/**
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* Block function uses a calling convention that returns a structure via a
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* pointer passed in by the caller.
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*/
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BLOCK_USE_SRET = (1 << 29),
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/**
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* Block has an Objective-C type encoding.
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*/
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BLOCK_HAS_SIGNATURE = (1 << 30),
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/**
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* Mask for the reference count in byref structure's flags field. The low
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* 3 bytes are reserved for the reference count, the top byte for the
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* flags.
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*/
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BLOCK_REFCOUNT_MASK = 0x00ffffff
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};
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/**
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* Flags used in the final argument to _Block_object_assign() and
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* _Block_object_dispose(). These indicate the type of copy or dispose to
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* perform.
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*/
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enum
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{
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/**
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* The value is of some id-like type, and should be copied as an
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* Objective-C object: i.e. by sending -retain or via the GC assign
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* functions in GC mode (not yet supported).
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*/
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BLOCK_FIELD_IS_OBJECT = 3,
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/**
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* The field is a block. This must be copied by the block copy functions.
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*/
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BLOCK_FIELD_IS_BLOCK = 7,
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/**
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* The field is an indirect reference to a variable declared with the
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* __block storage qualifier.
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*/
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BLOCK_FIELD_IS_BYREF = 8, // the on stack structure holding the __block variable
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BLOCK_FIELD_IS_WEAK = 16, // declared __weak
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BLOCK_BYREF_CALLER = 128, // called from byref copy/dispose helpers
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};
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#define IS_SET(x, y) ((x & y) == y)
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/*
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* Include the block_descriptor_copydispose and block_literal definitions that
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* are also made public under different names for use in libdispatch.
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*/
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#include "objc/blocks_private.h"
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/**
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* Block descriptor that does not contain copy and dispose helper functions.
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*/
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struct Block_descriptor_basic
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{
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/**
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* Reserved for future use, currently always 0.
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*/
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unsigned long int reserved;
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/** Size of the block. */
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unsigned long int size;
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/**
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* Objective-C type encoding of the block.
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*/
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const char *encoding;
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};
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/**
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* Structure used for on-stack variables that are referenced by blocks.
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*/
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struct block_byref_obj
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{
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/**
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* Class pointer. Currently unused and always NULL. Could be used in the
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* future to support introspection.
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*/
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void *isa;
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/**
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* The pointer to the structure that contains the real version of the data.
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* All accesses go via this pointer. If an on-stack byref structure is
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* copied to the heap, then its forwarding pointer should point to the heap
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* version. Otherwise it should point to itself.
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*/
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struct block_byref_obj *forwarding;
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/**
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* Flags and reference count.
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*/
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int flags; //refcount;
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/**
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* Size of this structure.
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*/
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int size;
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/**
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* Copy function.
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*/
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void (*byref_keep)(struct block_byref_obj *dst, const struct block_byref_obj *src);
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/**
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* Dispose function.
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*/
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void (*byref_dispose)(struct block_byref_obj *);
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/**
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* __block-qualified variables are copied here.
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*/
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};
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