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
|
/* Copyright (c) 1997-2024
Ewgenij Gawrilow, Michael Joswig, and the polymake team
Technische Universität Berlin, Germany
https://polymake.org
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version: http://www.gnu.org/licenses/gpl.txt.
This program 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 General Public License for more details.
--------------------------------------------------------------------------------
*/
#pragma once
#include <cstdlib>
namespace pm {
//! Maintains a list of private memory chunks of fixed size.
class chunk_allocator {
public:
static const size_t default_chunk_size=4096;
explicit chunk_allocator(size_t obj_size_arg, size_t n_objects_in_chunk_arg = 0);
void* allocate();
void reclaim(void* p);
// give all chunks back to the system
void clear();
~chunk_allocator() { release(); }
size_t get_object_size() const { return obj_size; }
protected:
void release();
size_t obj_size;
size_t n_objects_in_chunk;
char* free_obj;
char* last_obj;
char* chunk_end;
private:
// deleted
chunk_allocator(const chunk_allocator&);
void operator= (const chunk_allocator&);
};
}
// Local Variables:
// mode:C++
// c-basic-offset:3
// indent-tabs-mode:nil
// End:
|
