blob: b8f875f8cceaadd74d5cd4cb2c194e04a51f6937 (
plain)
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
|
//
// Copyright 2012 Josh Blum
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with io_sig program. If not, see <http://www.gnu.org/licenses/>.
/***********************************************************************
* There is allocation overhead for sending messages.
* Want per worker-allocator for message allocation...
* But until thats possible, install a new global allocator.
* This allocator uses a fixed pool for small sized buffers,
* and otherwise the regular malloc/free for larger buffers.
**********************************************************************/
#include <gras_impl/debug.hpp>
#include <Theron/Detail/Threading/SpinLock.h>
#include <Theron/IAllocator.h>
#include <Theron/AllocatorManager.h>
#include <boost/circular_buffer.hpp>
#define MY_ALLOCATOR_CHUNK_SIZE 88 //Theron asks for a lot of 88-byte buffers
#define MY_ALLOCATOR_POOL_SIZE (MY_ALLOCATOR_CHUNK_SIZE * 4096)
static struct WorkerAllocator : Theron::IAllocator
{
WorkerAllocator(void)
{
const size_t N = MY_ALLOCATOR_POOL_SIZE/MY_ALLOCATOR_CHUNK_SIZE;
queue.resize(N);
for (size_t i = 0; i < N; i++)
{
const ptrdiff_t pool_ptr = ptrdiff_t(pool) + i*MY_ALLOCATOR_CHUNK_SIZE;
queue.push_back((void *)pool_ptr);
}
Theron::AllocatorManager::Instance().SetAllocator(this);
}
~WorkerAllocator(void)
{
//NOP
}
void *Allocate(const SizeType size)
{
if (size <= MY_ALLOCATOR_CHUNK_SIZE)
{
mSpinLock.Lock();
ASSERT(not queue.empty());
void *memory = queue.front();
queue.pop_front();
mSpinLock.Unlock();
return memory;
}
else
{
//std::cout << "malloc size " << size << std::endl;
return std::malloc(size);
}
}
void Free(void *const memory)
{
const bool in_pool = ptrdiff_t(memory) >= ptrdiff_t(pool) and ptrdiff_t(memory) < (ptrdiff_t(pool) + MY_ALLOCATOR_POOL_SIZE);
if (in_pool)
{
mSpinLock.Lock();
queue.push_front(memory);
mSpinLock.Unlock();
}
else
{
std::free(memory);
}
}
boost::circular_buffer<void *> queue;
long pool[MY_ALLOCATOR_POOL_SIZE/sizeof(long)];
Theron::Detail::SpinLock mSpinLock;
} my_alloc;
|
