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
|
// ------------------------------------------------------------------------
// kvu_locks.cpp: Various lock related helper functions.
// Copyright (C) 2000-2002,2006 Kai Vehmanen
//
// This program 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.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// ------------------------------------------------------------------------
#include <signal.h> /* ANSI-C: sig_atomic_t */
#include <pthread.h> /* POSIX: threading */
#include "kvu_dbc.h"
#include "kvu_locks.h"
/* NOTE: This implementation is currenly a dummy one. The primary
* reason to use ATOMIC_OINT() is to mark all code segments
* where atomic read/write access is required.
*
* Tested platforms:
* - IA32 single- and multi-processor cases
*
* Platforms that should be atomic w.r.t. read/writes:
* - Alpha
* - ARM-v4 (ARM9) and older
* - IA64
* - MIPS
* - PowerPC
* - SH
* - S390
* - SPARC64
* - X86-64
*
* Platforms that where writes from multiple threads do _NOT_ work:
* - ARM-v6 (ARM11) and up
* - SPARC32
*
* References:
* - architecture manuals
* - Linux kernel and glibc sources
*/
ATOMIC_INTEGER::ATOMIC_INTEGER(int value)
{
value_rep = value;
}
ATOMIC_INTEGER::~ATOMIC_INTEGER(void)
{
}
int ATOMIC_INTEGER::get(void) const
{
return value_rep;
}
void ATOMIC_INTEGER::set(int value)
{
value_rep = value;
}
KVU_GUARD_LOCK::KVU_GUARD_LOCK(pthread_mutex_t* lock_arg)
{
lock_repp = lock_arg;
DBC_CHECK(pthread_mutex_lock(lock_repp) == 0);
}
KVU_GUARD_LOCK::~KVU_GUARD_LOCK(void)
{
DBC_CHECK(pthread_mutex_unlock(lock_repp) == 0);
}
|
