This file is indexed.

/usr/include/GNUstep/Foundation/NSZone.h is in libgnustep-base-dev 1.24.0-1ubuntu3.

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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
/** Zone memory management. -*- Mode: ObjC -*-
   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.

   Written by: Yoo C. Chung <wacko@laplace.snu.ac.kr>
   Date: January 1997

   This file is part of the GNUstep Base Library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02111 USA.

    AutogsdocSource:	NSZone.m
    AutogsdocSource:	NSPage.m

   */

#ifndef __NSZone_h_GNUSTEP_BASE_INCLUDE
#define __NSZone_h_GNUSTEP_BASE_INCLUDE
#import	"GNUstepBase/GSVersionMacros.h"

/**
 * Primary structure representing an <code>NSZone</code>.  Technically it
 * consists of a set of function pointers for zone upkeep functions plus some
 * other things-
<example>
{
  // Functions for zone.
  void *(*malloc)(struct _NSZone *zone, size_t size);
  void *(*realloc)(struct _NSZone *zone, void *ptr, size_t size);
  void (*free)(struct _NSZone *zone, void *ptr);
  void (*recycle)(struct _NSZone *zone);
  BOOL (*check)(struct _NSZone *zone);
  BOOL (*lookup)(struct _NSZone *zone, void *ptr);

  // Zone statistics (not always maintained).
  struct NSZoneStats (*stats)(struct _NSZone *zone);
  
  size_t gran;    // Zone granularity (passed in on initialization)
  NSString *name; // Name of zone (default is 'nil')
  NSZone *next;   // Pointer used for internal management of multiple zones.
}</example>
 */
typedef struct _NSZone NSZone;

#import	<Foundation/NSObjCRuntime.h>

@class NSString;

#if	defined(__cplusplus)
extern "C" {
#endif

struct _NSZone
{
  /* Functions for zone. */
  void *(*malloc)(struct _NSZone *zone, size_t size);
  void *(*realloc)(struct _NSZone *zone, void *ptr, size_t size);
  void (*free)(struct _NSZone *zone, void *ptr);
  void (*recycle)(struct _NSZone *zone);
  BOOL (*check)(struct _NSZone *zone);
  BOOL (*lookup)(struct _NSZone *zone, void *ptr);
  struct NSZoneStats (*stats)(struct _NSZone *zone);
  
  size_t gran; // Zone granularity
  __unsafe_unretained NSString *name; // Name of zone (default is 'nil')
  NSZone *next;
};

/**
 * Creates a new zone of start bytes, which will grow and shrink by
 * granularity bytes.  If canFree is 0, memory in zone is allocated but
 * never freed, meaning allocation will be very fast.  The whole zone can
 * still be freed with NSRecycleZone(), and you should still call NSZoneFree
 * on memory in the zone that is no longer needed, since a count of allocated
 * pointers is kept and must reach zero before freeing the zone.<br />
 * If Garbage Collection is enabled, this function does nothing other than
 * log a warning and return the same value as the NSDefaultMallocZone()
 * function.
 */
GS_EXPORT NSZone*
NSCreateZone (NSUInteger start, NSUInteger gran, BOOL canFree);

/** Returns the default zone for memory allocation.  Memory created in this
 * zone is the same as memory allocates using the system malloc() function.
 */
GS_EXPORT NSZone*
NSDefaultMallocZone (void);

/**
 * Searches and finds the zone ptr was allocated from.  The speed depends
 * upon the number of zones and their size.<br />
 * If Garbage Collection is enabled, this function always returns the
 * same as the NSDefaultMallocZone() function.
 */
GS_EXPORT NSZone*
NSZoneFromPointer (void *ptr);

/**
 * Allocates and returns memory for elems items of size bytes, in the
 * given zone.  Returns NULL if allocation of size 0 requested.  Raises
 * <code>NSMallocException</code> if not enough free memory in zone to
 * allocate and no more can be obtained from system, unless using the
 * default zone, in which case NULL is returned.<br />
 * If Garbage Collection is enabled, this function always allocates
 * non-scanned, non-collectable memory in the NSDefaultMallocZone() and
 * the zone argument is ignored.
 */
GS_EXPORT void*
NSZoneMalloc (NSZone *zone, NSUInteger size);

/**
 * Allocates and returns cleared memory for elems items of size bytes, in the
 * given zone.  Returns NULL if allocation of size 0 requested.  Raises
 * <code>NSMallocException</code> if not enough free memory in zone to
 * allocate and no more can be obtained from system, unless using the
 * default zone, in which case NULL is returned.<br />
 * If Garbage Collection is enabled, this function always allocates
 * non-scanned, non-collectable memory in the NSDefaultMallocZone() and
 * the zone argument is ignored.
 */
GS_EXPORT void*
NSZoneCalloc (NSZone *zone, NSUInteger elems, NSUInteger bytes);

/**
 * Reallocates the chunk of memory in zone pointed to by ptr to a new one of
 * size bytes.  Existing contents in ptr are copied over.  Raises an
 * <code>NSMallocException</code> if insufficient memory is available in the
 * zone and no more memory can be obtained from the system, unless using the
 * default zone, in which case NULL is returned.<br />
 * If Garbage Collection is enabled, the zone argument is ignored.
 */
GS_EXPORT void*
NSZoneRealloc (NSZone *zone, void *ptr, NSUInteger size);

/**
 * Return memory for an entire zone to system.  In fact, this will not be done
 * unless all memory in the zone has been explicitly freed (by calls to
 * NSZoneFree()).  For "non-freeable" zones, the number of NSZoneFree() calls
 * must simply equal the number of allocation calls.  The default zone, on the
 * other hand, cannot be recycled.<br />
 * If Garbage Collection is enabled, this function has not effect.
 */
GS_EXPORT void
NSRecycleZone (NSZone *zone);

/**
 * Frees memory pointed to by ptr (which should have been allocated by a
 * previous call to NSZoneMalloc(), NSZoneCalloc(), or NSZoneRealloc()) and
 * returns it to zone.  Note, if this is a nonfreeable zone, the memory is
 * not actually freed, but the count of number of free()s is updated.<br />
 * If Garbage Collection is enabled, the zone argument is ignored and this
 * function causes ptr to be deallocated immediately.
 */
GS_EXPORT void
NSZoneFree (NSZone *zone, void *ptr);

/**
 * Sets name of the given zone (useful for debugging and logging).
 */
GS_EXPORT void
NSSetZoneName (NSZone *zone, NSString *name);

/**
 * Returns the name of the given zone (useful for debugging and logging).
 */
GS_EXPORT NSString*
NSZoneName (NSZone *zone);

#if OS_API_VERSION(GS_API_NONE, GS_API_NONE)

/** Deprecated ...<br />
 * Checks integrity of a zone.  Not defined by OpenStep or OS X.
 */
BOOL
NSZoneCheck (NSZone *zone);

/**
 *  <code>NSZoneStats</code> is the structure returned by the NSZoneStats()
 *  function that summarizes the current usage of a zone.  It is similar to
 *  the structure <em>mstats</em> in the GNU C library.  It has 5 fields of
 *  type <code>size_t</code>-
 *  <deflist>
 *    <term><code>bytes_total</code></term>
 *    <desc>
 *    This is the total size of memory managed by the zone, in bytes.</desc>
 *    <term><code>chunks_used</code></term>
 *    <desc>This is the number of memory chunks in use in the zone.</desc>
 *    <term><code>bytes_used</code></term>
 *    <desc>This is the number of bytes in use.</desc>
 *    <term><code>chunks_free</code></term>
 *    <desc>This is the number of memory chunks that are not in use.</desc>
 *    <term><code>bytes_free</code></term>
 *    <desc>
 *    This is the number of bytes managed by the zone that are not in use.
 *    </desc>
 *  </deflist>
 */
struct NSZoneStats
{
  size_t bytes_total;
  size_t chunks_used;
  size_t bytes_used;
  size_t chunks_free;
  size_t bytes_free;
};

/** Deprecated ...<br />
 *  Obtain statistics about the zone.  Implementation emphasis is on
 *  correctness, not speed.  Not defined by OpenStep or OS X.
 */
struct NSZoneStats
NSZoneStats (NSZone *zone);

/**
 * Try to get more memory - the normal process has failed.
 * If we can't do anything, just return a null pointer.
 * Try to do some logging if possible.
 */
void*
GSOutOfMemory(NSUInteger size, BOOL retry);

/**
 * Called during +initialize to tell the class that instances created
 * in future should have the specified instance variable as a weak
 * pointer for garbage collection.<br />
 * NB. making a pointer weak does not mean that it is automatically
 * zeroed when the object it points to is garbage collected. To get that
 * behavior you must asign values to the pointer using the
 * GSAssignZeroingWeakPointer() function.<br />
 * This function has no effect if the system is
 * not built for garbage collection.
 */
GS_EXPORT void
GSMakeWeakPointer(Class theClass, const char *iVarName);

/**
 * This function must be used to assign a value to a zeroing weak pointer.<br />
 * A zeroing weak pointer is one where, when the garbage collector collects
 * the object pointed to, it also clears the weak pointer.<br />
 * Assigning zero (nil) will always succeed and has the effect of telling the
 * garbage collector that it no longer needs to track the previously assigned
 * object.  Apart from that case, a source needs to be garbage collectable for
 * this function to work, and using a non-garbage collectable value will
 * cause the function to return NO.<br />
 * If the destination object (the weak pointer watching the source object)
 * belongs to a chunk of memory which may be collected before the source
 * object is collected, it is important that it is finalised and the
 * finalisation code assigns zero to the pointer.<br />
 * If garbage collection is not in use, this function performs a simple
 * assignment returning YES, unless destination is null in which case it
 * returns NO.
 */
GS_EXPORT BOOL
GSAssignZeroingWeakPointer(void **destination, void *source);

#endif

GS_EXPORT NSUInteger
NSPageSize (void) __attribute__ ((const));

GS_EXPORT NSUInteger
NSLogPageSize (void) __attribute__ ((const));

GS_EXPORT NSUInteger
NSRoundDownToMultipleOfPageSize (NSUInteger bytes) __attribute__ ((const));

GS_EXPORT NSUInteger
NSRoundUpToMultipleOfPageSize (NSUInteger bytes) __attribute__ ((const));

GS_EXPORT NSUInteger
NSRealMemoryAvailable (void);

GS_EXPORT void*
NSAllocateMemoryPages (NSUInteger bytes);

GS_EXPORT void
NSDeallocateMemoryPages (void *ptr, NSUInteger bytes);

GS_EXPORT void
NSCopyMemoryPages (const void *src, void *dest, NSUInteger bytes);

#if OS_API_VERSION(MAC_OS_X_VERSION_10_4, OS_API_LATEST)

enum {
  NSScannedOption = (1<<0),
  NSCollectorDisabledOption = (1<<1),
};

/** Allocate memory.  If garbage collection is not enabled this uses the
 * default malloc zone and the options are ignored.<br />
 * If garbage collection is enabled, the allocate memory is normally not
 * scanned for pointers but is itsself garbage collectable.  The options
 * argument is a bitmask in which NSScannedOption sets the memory to be
 * scanned for pointers by the garbage collector, and
 * NSCollectorDisabledOption causes the memory to be excempt from being
 * garbage collected itsself.<br />
 * In any case the memory returned is zero'ed.
 */
GS_EXPORT GS_GC_STRONG void *
NSAllocateCollectable(NSUInteger size, NSUInteger options);

/** Reallocate memory to be of a different size and/or to have different
 * options settings.  The behavior of options is as for
 * the NSAllocateCollectable() function.
 */ 
GS_EXPORT GS_GC_STRONG void *
NSReallocateCollectable(void *ptr, NSUInteger size, NSUInteger options);

#endif

#if	defined(__cplusplus)
}
#endif

#endif /* not __NSZone_h_GNUSTEP_BASE_INCLUDE */