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Block.h
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Block_private.h
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data.c
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runtime.c
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Editing: Block_private.h
/* * Block_private.h * * Copyright 2008-2010 Apple, Inc. Permission is hereby granted, free of charge, * to any person obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do so, subject to the following * conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #ifndef _BLOCK_PRIVATE_H_ #define _BLOCK_PRIVATE_H_ #if !defined(BLOCK_EXPORT) # if defined(__cplusplus) # define BLOCK_EXPORT extern "C" # else # define BLOCK_EXPORT extern # endif #endif #ifndef _MSC_VER #include <stdbool.h> #else /* MSVC doesn't have <stdbool.h>. Compensate. */ typedef char bool; #define true (bool)1 #define false (bool)0 #endif #if defined(__cplusplus) extern "C" { #endif enum { BLOCK_REFCOUNT_MASK = (0xffff), BLOCK_NEEDS_FREE = (1 << 24), BLOCK_HAS_COPY_DISPOSE = (1 << 25), BLOCK_HAS_CTOR = (1 << 26), /* Helpers have C++ code. */ BLOCK_IS_GC = (1 << 27), BLOCK_IS_GLOBAL = (1 << 28), BLOCK_HAS_DESCRIPTOR = (1 << 29) }; /* Revised new layout. */ struct Block_descriptor { unsigned long int reserved; unsigned long int size; void (*copy)(void *dst, void *src); void (*dispose)(void *); }; struct Block_layout { void *isa; int flags; int reserved; void (*invoke)(void *, ...); struct Block_descriptor *descriptor; /* Imported variables. */ }; struct Block_byref { void *isa; struct Block_byref *forwarding; int flags; /* refcount; */ int size; void (*byref_keep)(struct Block_byref *dst, struct Block_byref *src); void (*byref_destroy)(struct Block_byref *); /* long shared[0]; */ }; struct Block_byref_header { void *isa; struct Block_byref *forwarding; int flags; int size; }; /* Runtime support functions used by compiler when generating copy/dispose helpers. */ enum { /* See function implementation for a more complete description of these fields and combinations */ BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)), block, ... */ BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */ BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the __block variable */ BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy helpers */ BLOCK_BYREF_CALLER = 128 /* called from __block (byref) copy/dispose support routines. */ }; /* Runtime entry point called by compiler when assigning objects inside copy helper routines */ BLOCK_EXPORT void _Block_object_assign(void *destAddr, const void *object, const int flags); /* BLOCK_FIELD_IS_BYREF is only used from within block copy helpers */ /* runtime entry point called by the compiler when disposing of objects inside dispose helper routine */ BLOCK_EXPORT void _Block_object_dispose(const void *object, const int flags); /* Other support functions */ /* Runtime entry to get total size of a closure */ BLOCK_EXPORT unsigned long int Block_size(void *block_basic); /* the raw data space for runtime classes for blocks */ /* class+meta used for stack, malloc, and collectable based blocks */ BLOCK_EXPORT void * _NSConcreteStackBlock[32]; BLOCK_EXPORT void * _NSConcreteMallocBlock[32]; BLOCK_EXPORT void * _NSConcreteAutoBlock[32]; BLOCK_EXPORT void * _NSConcreteFinalizingBlock[32]; BLOCK_EXPORT void * _NSConcreteGlobalBlock[32]; BLOCK_EXPORT void * _NSConcreteWeakBlockVariable[32]; /* the intercept routines that must be used under GC */ BLOCK_EXPORT void _Block_use_GC( void *(*alloc)(const unsigned long, const bool isOne, const bool isObject), void (*setHasRefcount)(const void *, const bool), void (*gc_assign_strong)(void *, void **), void (*gc_assign_weak)(const void *, void *), void (*gc_memmove)(void *, void *, unsigned long)); /* earlier version, now simply transitional */ BLOCK_EXPORT void _Block_use_GC5( void *(*alloc)(const unsigned long, const bool isOne, const bool isObject), void (*setHasRefcount)(const void *, const bool), void (*gc_assign_strong)(void *, void **), void (*gc_assign_weak)(const void *, void *)); BLOCK_EXPORT void _Block_use_RR( void (*retain)(const void *), void (*release)(const void *)); /* make a collectable GC heap based Block. Not useful under non-GC. */ BLOCK_EXPORT void *_Block_copy_collectable(const void *aBlock); /* thread-unsafe diagnostic */ BLOCK_EXPORT const char *_Block_dump(const void *block); /* Obsolete */ /* first layout */ struct Block_basic { void *isa; int Block_flags; /* int32_t */ int Block_size; /* XXX should be packed into Block_flags */ void (*Block_invoke)(void *); void (*Block_copy)(void *dst, void *src); /* iff BLOCK_HAS_COPY_DISPOSE */ void (*Block_dispose)(void *); /* iff BLOCK_HAS_COPY_DISPOSE */ /* long params[0]; // where const imports, __block storage references, etc. get laid down */ }; #if defined(__cplusplus) } #endif #endif /* _BLOCK_PRIVATE_H_ */
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