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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/* $FreeBSD$ */
/*
* Copyright (C) 2012 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* $Id$
*/
#include "ipf.h"
#define EMM_MAGIC 0x97dd8b3a
void eMrwlock_read_enter(rw, file, line)
eMrwlock_t *rw;
char *file;
int line;
{
if (rw->eMrw_magic != EMM_MAGIC) {
fprintf(stderr, "%s:eMrwlock_read_enter(%p): bad magic: %#x\n",
rw->eMrw_owner, rw, rw->eMrw_magic);
abort();
}
if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {
fprintf(stderr,
"%s:eMrwlock_read_enter(%p): already locked: %d/%d\n",
rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
abort();
}
rw->eMrw_read++;
rw->eMrw_heldin = file;
rw->eMrw_heldat = line;
}
void eMrwlock_write_enter(rw, file, line)
eMrwlock_t *rw;
char *file;
int line;
{
if (rw->eMrw_magic != EMM_MAGIC) {
fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n",
rw->eMrw_owner, rw, rw->eMrw_magic);
abort();
}
if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {
fprintf(stderr,
"%s:eMrwlock_write_enter(%p): already locked: %d/%d\n",
rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
abort();
}
rw->eMrw_write++;
rw->eMrw_heldin = file;
rw->eMrw_heldat = line;
}
void eMrwlock_downgrade(rw, file, line)
eMrwlock_t *rw;
char *file;
int line;
{
if (rw->eMrw_magic != EMM_MAGIC) {
fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n",
rw->eMrw_owner, rw, rw->eMrw_magic);
abort();
}
if (rw->eMrw_read != 0 || rw->eMrw_write != 1) {
fprintf(stderr,
"%s:eMrwlock_write_enter(%p): already locked: %d/%d\n",
rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
abort();
}
rw->eMrw_write--;
rw->eMrw_read++;
rw->eMrw_heldin = file;
rw->eMrw_heldat = line;
}
void eMrwlock_exit(rw)
eMrwlock_t *rw;
{
if (rw->eMrw_magic != EMM_MAGIC) {
fprintf(stderr, "%s:eMrwlock_exit(%p): bad magic: %#x\n",
rw->eMrw_owner, rw, rw->eMrw_magic);
abort();
}
if (rw->eMrw_read != 1 && rw->eMrw_write != 1) {
fprintf(stderr, "%s:eMrwlock_exit(%p): not locked: %d/%d\n",
rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
abort();
}
if (rw->eMrw_read == 1)
rw->eMrw_read--;
else if (rw->eMrw_write == 1)
rw->eMrw_write--;
rw->eMrw_heldin = NULL;
rw->eMrw_heldat = 0;
}
static int initcount = 0;
void eMrwlock_init(rw, who)
eMrwlock_t *rw;
char *who;
{
if (rw->eMrw_magic == EMM_MAGIC) { /* safe bet ? */
fprintf(stderr,
"%s:eMrwlock_init(%p): already initialised?: %#x\n",
rw->eMrw_owner, rw, rw->eMrw_magic);
abort();
}
rw->eMrw_magic = EMM_MAGIC;
rw->eMrw_read = 0;
rw->eMrw_write = 0;
if (who != NULL)
rw->eMrw_owner = strdup(who);
else
rw->eMrw_owner = NULL;
initcount++;
}
void eMrwlock_destroy(rw)
eMrwlock_t *rw;
{
if (rw->eMrw_magic != EMM_MAGIC) {
fprintf(stderr, "%s:eMrwlock_destroy(%p): bad magic: %#x\n",
rw->eMrw_owner, rw, rw->eMrw_magic);
abort();
}
if (rw->eMrw_owner != NULL)
free(rw->eMrw_owner);
memset(rw, 0xa5, sizeof(*rw));
initcount--;
}
void ipf_rwlock_clean()
{
if (initcount != 0)
abort();
}
|
