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
|
/*******************************************************************************
* Copyright (c) 2006 International Business Machines Corporation. *
* All rights reserved. This program and the accompanying materials *
* are made available under the terms of the Common Public License v1.0 *
* which accompanies this distribution, and is available at *
* http://www.opensource.org/licenses/cpl1.0.php *
* *
* Contributors: *
* Douglas M. Pase - initial API and implementation *
* Tim Besard - prefetching, JIT compilation *
*******************************************************************************/
//
// Configuration
//
// Implementation header
#include "thread.h"
// System includes
#include <cstdio>
#include <pthread.h>
#include <unistd.h>
Lock Thread::_global_lock;
int Thread::count = 0;
//
// Implementation
//
Thread::Thread() {
Thread::global_lock();
this->id = Thread::count;
Thread::count += 1;
Thread::global_unlock();
}
Thread::~Thread() {
}
int Thread::start() {
return pthread_create(&this->thread, NULL, Thread::start_routine, this);
}
void*
Thread::start_routine(void* p) {
// get the current affinity
cpu_set_t cs;
CPU_ZERO(&cs);
sched_getaffinity(0, sizeof(cs), &cs);
// deduce the amount of CPUs
int count = 0;
for (int i = 0; i < 8; i++)
{
if (CPU_ISSET(i, &cs))
count++;
}
// restrict to a single CPU
CPU_ZERO(&cs);
size_t size = CPU_ALLOC_SIZE(1);
CPU_SET_S(((Thread*) p)->id % count, size, &cs);
sched_setaffinity(pthread_self(), size, &cs);
// run
((Thread*) p)->run();
return NULL;
}
void Thread::exit() {
pthread_exit(NULL);
}
int Thread::wait() {
pthread_join(this->thread, NULL);
return 0;
}
void Thread::lock() {
this->object_lock.lock();
}
void Thread::unlock() {
this->object_lock.unlock();
}
void Thread::global_lock() {
Thread::_global_lock.lock();
}
void Thread::global_unlock() {
Thread::_global_lock.unlock();
}
|
