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58 lines
1.9 KiB
Objective-C
58 lines
1.9 KiB
Objective-C
/*
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* Copyright (c) 2009 Remy Demarest
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* Portions Copyright (c) 2009 David Chisnall
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifdef EMBEDDED_BLOCKS_RUNTIME
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#import "objc/blocks_runtime.h"
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#include "blocks_runtime.h"
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#else
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#import <Block.h>
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#import <Block_private.h>
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#endif
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#include "visibility.h"
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OBJC_PUBLIC const char *block_getType_np(const void *b)
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{
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return _Block_signature((void*)b);
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}
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/**
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* Returns the block pointer, or NULL if the block is already
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* being deallocated. The implementation does not employ atomic
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* operations, so this function must only be called by the ARC
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* subsystem after obtaining the weak-reference lock.
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*/
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PRIVATE void* block_load_weak(void *block)
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{
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struct Block_layout *self = block;
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#ifdef EMBEDDED_BLOCKS_RUNTIME
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return (self->reserved) > 0 ? block : 0;
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#else
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return (self->flags) & BLOCK_REFCOUNT_MASK ? block : 0;
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#endif
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}
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