aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/lib/Xt/Alloc.c
blob: 1312db2ac8ca8a5e323a31ecbf70d509959a9997 (plain)
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
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
/* $Xorg: Alloc.c,v 1.4 2001/02/09 02:03:53 xorgcvs Exp $ */

/***********************************************************
Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts,
Copyright 1993 by Sun Microsystems, Inc. Mountain View, CA.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the names of Digital or Sun not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO  THIS  SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE  LI-
ABLE  FOR  ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,  DATA  OR
PROFITS,  WHETHER  IN  AN  ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
THE USE OR PERFORMANCE OF THIS SOFTWARE.

******************************************************************/

/*

Copyright 1987, 1988, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

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
OPEN GROUP 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.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.

*/
/* $XFree86: xc/lib/Xt/Alloc.c,v 1.9 2001/12/14 19:56:07 dawes Exp $ */

/*
 * X Toolkit Memory Allocation Routines
 *
 * Uses Xlib memory management, which is spec'd to be re-entrant.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "IntrinsicI.h"
#include "InitialI.h"
#undef _XBCOPYFUNC

#include <stdlib.h>

#define Xmalloc(size) malloc((size))
#define Xrealloc(ptr, size) realloc((ptr), (size))
#define Xcalloc(nelem, elsize) calloc((nelem), (elsize))
#define Xfree(ptr) free(ptr)

#ifdef _XNEEDBCOPYFUNC
void _XtBcopy(
    char *src, char *dst,
    int length)
{
    if (src < dst) {
	dst += length;
	src += length;
	while (length--)
	    *--dst = *--src;
    } else {
	while (length--)
	    *dst++ = *src++;
    }
}
#endif

void _XtAllocError(
    String type)
{
    Cardinal num_params = 1;
    if (type == NULL) type = "local memory allocation";
    XtErrorMsg("allocError", type, XtCXtToolkitError,
	       "Cannot perform %s", &type, &num_params);
}

void _XtHeapInit(
    Heap*	heap)
{
    heap->start = NULL;
    heap->bytes_remaining = 0;
}

#ifndef XTTRACEMEMORY

char *XtMalloc(
    unsigned size)
{
    char *ptr;

#if defined(MALLOC_0_RETURNS_NULL) && defined(XTMALLOC_BC)
    /* preserve this (broken) behavior until everyone fixes their apps */
    if (!size) size = 1;
#endif
    if ((ptr = Xmalloc(size)) == NULL)
        _XtAllocError("malloc");

    return(ptr);
}

char *XtRealloc(
    char     *ptr,
    unsigned size)
{
   if (ptr == NULL) {
#ifdef MALLOC_0_RETURNS_NULL
	if (!size) size = 1;
#endif
	return(XtMalloc(size));
   } else if ((ptr = Xrealloc(ptr, size)) == NULL
#ifdef MALLOC_0_RETURNS_NULL
		&& size
#endif
	)
	_XtAllocError("realloc");

   return(ptr);
}

char *XtCalloc(
    unsigned num, unsigned size)
{
    char *ptr;

#if defined(MALLOC_0_RETURNS_NULL) && defined(XTMALLOC_BC)
    /* preserve this (broken) behavior until everyone fixes their apps */
    if (!size) num = size = 1;
#endif
    if ((ptr = Xcalloc(num, size)) == NULL)
	_XtAllocError("calloc");

    return(ptr);
}

void XtFree(
    char *ptr)
{
    if (ptr != NULL) Xfree(ptr);
}

char* __XtMalloc(
    unsigned size)
{
#ifdef MALLOC_0_RETURNS_NULL
    if (!size) size = 1;
#endif
    return XtMalloc (size);
}

char* __XtCalloc(
    unsigned num, unsigned size)
{
#ifdef MALLOC_0_RETURNS_NULL
    if (!size) num = size = 1;
#endif
    return XtCalloc(num, size);
}

#ifndef HEAP_SEGMENT_SIZE
#define HEAP_SEGMENT_SIZE 1492
#endif

char* _XtHeapAlloc(
    Heap*	heap,
    Cardinal	bytes)
{
    register char* heap_loc;
    if (heap == NULL) return XtMalloc(bytes);
    if (heap->bytes_remaining < (int)bytes) {
	if ((bytes + sizeof(char*)) >= (HEAP_SEGMENT_SIZE>>1)) {
	    /* preserve current segment; insert this one in front */
#ifdef _TRACE_HEAP
	    printf( "allocating large segment (%d bytes) on heap %#x\n",
		    bytes, heap );
#endif
	    heap_loc = XtMalloc(bytes + sizeof(char*));
	    if (heap->start) {
		*(char**)heap_loc = *(char**)heap->start;
		*(char**)heap->start = heap_loc;
	    }
	    else {
		*(char**)heap_loc = NULL;
		heap->start = heap_loc;
	    }
	    return heap_loc + sizeof(char*);
	}
	/* else discard remainder of this segment */
#ifdef _TRACE_HEAP
	printf( "allocating new segment on heap %#x\n", heap );
#endif
	heap_loc = XtMalloc((unsigned)HEAP_SEGMENT_SIZE);
	*(char**)heap_loc = heap->start;
	heap->start = heap_loc;
	heap->current = heap_loc + sizeof(char*);
	heap->bytes_remaining = HEAP_SEGMENT_SIZE - sizeof(char*);
    }
    bytes = (bytes + (sizeof(long) - 1)) & (~(sizeof(long) - 1));
    heap_loc = heap->current;
    heap->current += bytes;
    heap->bytes_remaining -= bytes; /* can be negative, if rounded */
    return heap_loc;
}

void _XtHeapFree(
    Heap*	heap)
{
    char* segment = heap->start;
    while (segment != NULL) {
	char* next_segment = *(char**)segment;
	XtFree(segment);
	segment = next_segment;
    }
    heap->start = NULL;
    heap->bytes_remaining = 0;
}

#else

/*
 * X Toolkit Memory Trace Allocation Routines
 */

#undef XtMalloc
#undef XtRealloc
#undef XtCalloc
#undef XtFree

typedef struct _Stats *StatsPtr;
typedef struct _Stats {
    StatsPtr prev, next;
    char *file;
    int line;
    unsigned size;
    unsigned long seq;
    XtPointer heap;
} Stats;

static StatsPtr XtMemory = (StatsPtr)NULL;
static unsigned long ActiveXtMemory = 0;
static unsigned long XtSeqId = 0;
static unsigned long XtSeqBreakpoint = ~0;

#define StatsSize(n) ((((n) + (sizeof(long) - 1)) & ~(sizeof(long) - 1)) + sizeof(Stats))
#define ToStats(ptr) ((StatsPtr)(ptr - sizeof(Stats)))
#define ToMem(ptr) (((char *)ptr) + sizeof(Stats))

#define CHAIN(ptr,len,hp) \
    ptr->next = XtMemory; \
    if (XtMemory) \
        XtMemory->prev = ptr; \
    XtMemory = ptr; \
    ptr->prev = (StatsPtr)NULL; \
    ptr->file = file; \
    ptr->line = line; \
    ptr->size = len; \
    ptr->heap = hp; \
    if (file) \
	ActiveXtMemory += len; \
    ptr->seq = XtSeqId; \
    if (XtSeqId == XtSeqBreakpoint) \
	_XtBreakpoint(ptr); \
    XtSeqId++

/*ARGUSED*/
static void _XtBreakpoint(
    StatsPtr mem)
{
    mem->seq = XtSeqId; /* avoid being optimized out of existence */
}

char *_XtMalloc(
    unsigned size,
    char *file,
    int line)
{
    StatsPtr ptr;
    unsigned newsize;
    char* retval = NULL;

    LOCK_PROCESS;
    newsize = StatsSize(size);
    if ((ptr = (StatsPtr)Xmalloc(newsize)) == NULL)
        _XtAllocError("malloc");
    CHAIN(ptr, size, NULL);
    retval = (ToMem(ptr));
    UNLOCK_PROCESS;
    return retval;
}

char *XtMalloc(
    unsigned size)
{
    return _XtMalloc(size, (char *)NULL, 0);
}

char *_XtRealloc(
    char     *ptr,
    unsigned size,
    char *file,
    int line)
{
   char *newptr;

   LOCK_PROCESS;
   newptr = _XtMalloc(size, file, line);
   if (ptr) {
       unsigned copysize = ToStats(ptr)->size;
       if (copysize > size) copysize = size;
       memmove(newptr, ptr, copysize);
       _XtFree(ptr);
   }
   UNLOCK_PROCESS;
   return(newptr);
}

char *XtRealloc(
    char     *ptr,
    unsigned size)
{
    return _XtRealloc(ptr, size, (char *)NULL, 0);
}

char *_XtCalloc(
    unsigned num, unsigned size,
    char *file,
    int line)
{
    StatsPtr ptr;
    unsigned total, newsize;
    char* retval = NULL;

    LOCK_PROCESS;
    total = num * size;
    newsize = StatsSize(total);
    if ((ptr = (StatsPtr)Xcalloc(newsize, 1)) == NULL)
        _XtAllocError("calloc");
    CHAIN(ptr, total, NULL);
    retval = (ToMem(ptr));
    UNLOCK_PROCESS;
    return retval;
}

char *XtCalloc(
    unsigned num, unsigned size)
{
    return _XtCalloc(num, size, (char *)NULL, 0);
}

Boolean _XtIsValidPointer(
    char *ptr)
{
    register StatsPtr mem;
    register StatsPtr stp = ToStats(ptr);

    LOCK_PROCESS;
    for (mem = XtMemory; mem; mem = mem->next) {
	if (mem == stp) {
	    UNLOCK_PROCESS;
	    return True;
	}
    }
    UNLOCK_PROCESS;
    return False;
}

Boolean _XtValidateMemory = False;

void _XtFree(
    char *ptr)
{
   register StatsPtr stp;

   LOCK_PROCESS;
   if (ptr) {
       if (_XtValidateMemory && !_XtIsValidPointer(ptr))
	   abort();
       stp = ToStats(ptr);
       if (stp->file)
	   ActiveXtMemory -= stp->size;
       if (stp->prev)
	   stp->prev->next = stp->next;
       else
	   XtMemory = stp->next;
       if (stp->next)
	   stp->next->prev = stp->prev;
       Xfree((char *)stp);
   }
   UNLOCK_PROCESS;
}

void XtFree(char *ptr)
{
   _XtFree(ptr);
}

char *_XtHeapMalloc(
    Heap *heap,
    Cardinal size,
    char *file,
    int line)
{
    StatsPtr ptr;
    unsigned newsize;
    XtPointer hp = (XtPointer) heap;
    char* retval = NULL;

    LOCK_PROCESS;
    newsize = StatsSize(size);
    if ((ptr = (StatsPtr)Xmalloc(newsize)) == NULL)
        _XtAllocError("malloc");
    CHAIN(ptr, size, hp);
    retval = (ToMem(ptr));
    UNLOCK_PROCESS;
    return retval;
}

void _XtHeapFree(register XtPointer heap)
{
    register StatsPtr mem, next;

    LOCK_PROCESS;
    for (mem = XtMemory; mem; mem = next) {
	next = mem->next;
	if (mem->heap == heap) {
	    if (mem->file)
		ActiveXtMemory -= mem->size;
	    if (mem->prev)
		mem->prev->next = next;
	    else
		XtMemory = next;
	    if (next)
		next->prev = mem->prev;
	    Xfree((char *)mem);
	}
    }
    UNLOCK_PROCESS;
}

#include <stdio.h>

void _XtPrintMemory(char * filename)
{
    register StatsPtr mem;
    FILE *f;

    if (filename == NULL)
	f = stderr;
    else 
	f = fopen(filename, "w");
    LOCK_PROCESS;
    fprintf(f, "total size: %d\n", ActiveXtMemory);
    for (mem = XtMemory; mem; mem = mem->next) {
	if (mem->file)
	    fprintf(f, "size: %6d  seq: %5d  %12s(%4d)  %s\n",
		    mem->size, mem->seq,
		    mem->file, mem->line, mem->heap ? "heap" : "");
    }
    UNLOCK_PROCESS;
    if (filename) fclose(f);
}

#endif  /* XTTRACEMEMORY */