This file is indexed.

/usr/include/Block_private.h is in libblocksruntime-dev 0.1-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/*
 * 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_ */