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
|
/*
===========================================================================
Copyright (C) 2015 the OpenMoHAA team
This file is part of OpenMoHAA source code.
OpenMoHAA source code 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 of the License,
or (at your option) any later version.
OpenMoHAA source code 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.
You should have received a copy of the GNU General Public License
along with OpenMoHAA source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
// mem_tempalloc.cpp: Fast temporary memory manager
#include "mem_tempalloc.h"
#ifdef GAME_DLL
# include "../fgame/g_local.h"
# define MEM_TempAllocate(x) gi.Malloc(x)
# define MEM_TempFree(x) gi.Free(x)
#elif defined(CGAME_DLL)
# include "../cgame/cg_local.h"
# define MEM_TempAllocate(x) cgi.Malloc(x)
# define MEM_TempFree(x) cgi.Free(x)
#else
# include "qcommon.h"
# define MEM_TempAllocate(x) Z_Malloc(x)
# define MEM_TempFree(x) Z_Free(x)
#endif
class tempBlock_t
{
public:
void *GetData();
void *GetData(size_t pos);
public:
tempBlock_t *prev;
};
MEM_TempAlloc::MEM_TempAlloc()
{
m_CurrentMemoryBlock = nullptr;
m_CurrentMemoryPos = 0;
m_BlockSize = 0;
m_LastPos = 0;
}
void *MEM_TempAlloc::Alloc(size_t len)
{
if (m_CurrentMemoryBlock && m_CurrentMemoryPos + len <= m_BlockSize) {
void *data = m_CurrentMemoryBlock->GetData(m_CurrentMemoryPos);
m_LastPos = m_CurrentMemoryPos;
m_CurrentMemoryPos += len;
return data;
} else {
return CreateBlock(len);
}
}
void *MEM_TempAlloc::Alloc(size_t len, size_t alignment)
{
if (m_CurrentMemoryBlock) {
if (m_CurrentMemoryPos % alignment != 0) {
m_CurrentMemoryPos += alignment - m_CurrentMemoryPos % alignment;
}
if (m_CurrentMemoryPos + len <= m_BlockSize) {
void *data = m_CurrentMemoryBlock->GetData(m_CurrentMemoryPos);
m_LastPos = m_CurrentMemoryPos;
m_CurrentMemoryPos += len;
return data;
}
}
return CreateBlock(len);
}
void MEM_TempAlloc::FreeAll(void)
{
while (m_CurrentMemoryBlock) {
tempBlock_t *prev_block = m_CurrentMemoryBlock->prev;
MEM_TempFree(m_CurrentMemoryBlock);
m_CurrentMemoryBlock = prev_block;
}
}
void *MEM_TempAlloc::CreateBlock(size_t len)
{
m_CurrentMemoryPos = len;
// allocate a new block
tempBlock_t *prev_block = m_CurrentMemoryBlock;
m_CurrentMemoryBlock = (tempBlock_t *)MEM_TempAllocate(sizeof(tempBlock_t) + Q_max(m_BlockSize, len));
m_CurrentMemoryBlock->prev = prev_block;
return m_CurrentMemoryBlock->GetData();
}
void *tempBlock_t::GetData()
{
return (void *)(this + 1);
}
void *tempBlock_t::GetData(size_t pos)
{
return (uint8_t *)(this + 1) + pos;
}
|
