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
|
/* Copyright (C) 2021 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.
*/
#ifndef INCLUDED_ALIGNMENT
#define INCLUDED_ALIGNMENT
#include "lib/sysdep/compiler.h" // MSC_VERSION
#include "lib/sysdep/arch.h" // ARCH_AMD64
template<typename T>
inline bool IsAligned(T t, uintptr_t multiple)
{
return (uintptr_t(t) % multiple) == 0;
}
template<size_t multiple>
inline size_t Align(size_t n)
{
cassert(multiple != 0 && ((multiple & (multiple-1)) == 0)); // is power of 2
return (n + multiple-1) & ~(multiple-1);
}
// bridge the differences between MSC and GCC alignment definitions.
// example: ALIGNED(int, 8) myAlignedVariable = 0;
#if MSC_VERSION
# define ALIGNED(type, multiple) __declspec(align(multiple)) type
#elif GCC_VERSION
# define ALIGNED(type, multiple) type __attribute__((aligned(multiple)))
#else
# define ALIGNED(type, multiple) type
#endif
//
// SIMD vector
//
static const size_t vectorSize = 16;
#define VECTOR_ALIGNED(type) ALIGNED(type, 16) // ALIGNED() requires a literal; keep in sync with vectorSize
#define ASSERT_VECTOR_MULTIPLE(size)\
ASSERT(IsAligned(size, vectorSize))
#define ASSERT_VECTOR_ALIGNED(pointer)\
ASSERT_VECTOR_MULTIPLE(pointer);\
ASSUME_ALIGNED(pointer, vectorSize)
//
// CPU cache
//
static const size_t cacheLineSize = 64; // (L2)
#define CACHE_ALIGNED(type) ALIGNED(type, 64) // ALIGNED() requires a literal; keep in sync with cacheLineSize
//
// MMU pages
//
#ifdef ARCH_PPC64
// NOTE: ppc64 can operate in either 4k or 64k page size mode
// If the define page size is larger than the active page size,
// the allocator functions normally. If the defined page size
// is less than the active page size, the allocator fails tests.
//
// Define the page size to the maximum known architectural page
// size on ppc64 systems.
static const size_t g_PageSize = 64 * 1024; // 64 KB
#else
static const size_t g_PageSize = 4 * 1024; // 4 KB
#endif
static const size_t g_LargePageSize = 2 * 1024 * 1024; // 2 MB
//
// misc
//
static const size_t allocationAlignment = 16;
static const size_t KiB = size_t(1) << 10;
static const size_t MiB = size_t(1) << 20;
static const size_t GiB = size_t(1) << 30;
// waio opens files with FILE_FLAG_NO_BUFFERING, so Windows requires
// file offsets / buffers and sizes to be sector-aligned. querying the
// actual sector size via GetDiskFreeSpace is inconvenient and slow.
// we always request large blocks anyway, so just check whether inputs
// are aligned to a `maximum' sector size. this catches common mistakes
// before they cause scary "IO failed" errors. if the value turns out
// to be too low, the Windows APIs will still complain.
static const uintptr_t maxSectorSize = 0x1000;
#endif // #ifndef INCLUDED_ALIGNMENT
|
