elexis
43137fef3f
Differential Revision: https://code.wildfiregames.com/D716
Refs 09e974e1cb
Reviewed By: bb
Change in agreement with leper.
This was SVN commit r19899.
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
/* 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
|