File: arena.cpp

package info (click to toggle)
0ad 0.0.23.1-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 78,292 kB
  • sloc: cpp: 245,166; ansic: 200,249; python: 13,754; sh: 6,104; perl: 4,620; makefile: 977; xml: 810; java: 533; ruby: 229; erlang: 46; pascal: 30; sql: 21; tcl: 4
file content (75 lines) | stat: -rw-r--r-- 2,421 bytes parent folder | download | duplicates (2)
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
/* Copyright (C) 2011 Wildfire Games.
 *
 * 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.
 */

/*
 * arena allocator (variable-size blocks, no deallocation).
 */

#include "precompiled.h"
#include "lib/allocators/arena.h"

namespace Allocators {

template<class Storage>
struct BasicArenaTest
{
	void operator()() const
	{
		Arena<Storage> a(100);
		const size_t initialSpace = a.RemainingBytes();
		void* p = a.allocate(100);
		ENSURE(p != 0);
		ENSURE(a.Contains(uintptr_t(p)));
		ENSURE(a.RemainingBytes() == initialSpace-100);
		ENSURE(a.Contains(uintptr_t(p)+1));
		ENSURE(a.Contains(uintptr_t(p)+99));
		ENSURE(!a.Contains(uintptr_t(p)-1));
		ENSURE(!a.Contains(uintptr_t(p)+100));
		if(a.RemainingBytes() == 0)
			ENSURE(a.allocate(1) == 0);	// full
		else
			ENSURE(a.allocate(1) != 0);	// can still expand
		a.DeallocateAll();
		ENSURE(!a.Contains(uintptr_t(p)));

		p = a.allocate(36);
		ENSURE(p != 0);
		ENSURE(a.Contains(uintptr_t(p)));
		ENSURE(a.RemainingBytes() == initialSpace-36);
		void* p2 = a.allocate(64);
		ENSURE(p2 != 0);
		ENSURE(a.Contains(uintptr_t(p2)));
		ENSURE(a.RemainingBytes() == initialSpace-36-64);
		ENSURE(p2 == (void*)(uintptr_t(p)+36));
		if(a.RemainingBytes() == 0)
			ENSURE(a.allocate(1) == 0);	// full
		else
			ENSURE(a.allocate(1) != 0);	// can still expand
	}
};

void TestArena()
{
	ForEachStorage<BasicArenaTest>();
}

}	// namespace Allocators