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
|
/*
// The MIT License (MIT)
//
// Copyright (c) 2015 Howard Hinnant
//
// 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 STACK_ALLOC_IPP
#define STACK_ALLOC_IPP
namespace jwt {
template <size_t N, size_t alignment>
template <size_t reqested_alignment>
char* Arena<N, alignment>::allocate(size_t n) noexcept
{
static_assert (reqested_alignment <= alignment,
"Requested alignment is too small for this arena");
assert (pointer_in_storage(ptr_) &&
"No more space in the arena or it has outgrown its capacity");
n = align_up(n);
if ((ptr_ + n) <= (buf_ + N)) {
char* ret = ptr_;
ptr_ += n;
return ret;
}
assert (0 && "Code should not reach here");
return nullptr;
}
template <size_t N, size_t alignment>
void Arena<N, alignment>::deallocate(char* p, size_t n) noexcept
{
assert (pointer_in_storage(p) &&
"The address to de deleted does not lie inside the storage");
n = align_up(n);
if ((p + n) == ptr_) {
ptr_ = p;
}
return;
}
template <typename T, size_t N, size_t alignment>
T* stack_alloc<T, N, alignment>::allocate(size_t n) noexcept
{
return reinterpret_cast<T*>(
arena_.template allocate<alignof(T)>(n * sizeof(T))
);
}
template <typename T, size_t N, size_t alignment>
void stack_alloc<T, N, alignment>::deallocate(T* p, size_t n) noexcept
{
arena_.deallocate(reinterpret_cast<char*>(p), n);
return;
}
}
#endif
|
