2 * Copyright (C) 2016 Robin Gareus <robin@gareus.org>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 #ifndef _reallocpool_h_
20 #define _reallocpool_h_
23 #define RAP_WITH_CALL_STATS // collect statistics on calls counts (light)
24 //#define RAP_WITH_HISTOGRAM 513 // collect statistic about allocation size (not bad)
25 //#define RAP_WITH_SEGMENT_STATS // collect statistics (expensive)
28 #define RAP_BLOCKSIZE 7 // [bytes] power-of-two minus one (optional)
31 #ifdef RAP_WITH_SEGMENT_STATS
32 #define RAP_WITH_CALL_STATS
38 #include "pbd/libpbd_visibility.h"
43 class LIBPBD_API ReallocPool
46 ReallocPool (std::string name, size_t bytes);
49 void set_name (const std::string& n) { _name = n; }
51 static void * lalloc (void* pool, void *ptr, size_t oldsize, size_t newsize) {
52 return static_cast<ReallocPool*>(pool)->_realloc (ptr, oldsize, newsize);
55 void * malloc (size_t size) {
56 return _realloc (NULL, 0, size);
59 void free (void *ptr) {
60 if (ptr) _realloc (ptr, 0, 0);
63 void * realloc (void *ptr, size_t newsize) {
64 return _realloc (ptr, _asize(ptr), newsize);
70 #ifdef RAP_WITH_CALL_STATS
71 size_t mem_used () const { return _cur_used; }
80 #ifdef RAP_WITH_SEGMENT_STATS
82 size_t _cur_allocated;
83 size_t _max_allocated;
84 size_t _seg_cur_count;
85 size_t _seg_max_count;
87 size_t _seg_max_avail;
88 void collect_segment_stats ();
90 #ifdef RAP_WITH_CALL_STATS
97 size_t _cur_used; // cheaper _cur_allocated
98 size_t _max_used; // cheaper _max_allocated
100 #ifdef RAP_WITH_HISTOGRAM
101 size_t _hist_alloc [RAP_WITH_HISTOGRAM];
102 size_t _hist_free [RAP_WITH_HISTOGRAM];
103 size_t _hist_grow [RAP_WITH_HISTOGRAM];
104 size_t _hist_shrink [RAP_WITH_HISTOGRAM];
106 unsigned int hist_bin (size_t s) const;
107 void print_histogram (size_t const * const histogram) const;
110 void *_realloc (void *ptr, size_t oldsize, size_t newsize);
111 void *_malloc (size_t);
112 void _free (void *ptr);
113 void _shrink (void *, size_t);
114 size_t _asize (void *);
115 void consolidate_ptr (char *);
119 #endif // _reallocpool_h_