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rwlock_emul.c (170268) rwlock_emul.c (255332)
1/* $FreeBSD: head/contrib/ipfilter/lib/rwlock_emul.c 170268 2007-06-04 02:54:36Z darrenr $ */
1/* $FreeBSD: head/contrib/ipfilter/lib/rwlock_emul.c 255332 2013-09-06 23:11:19Z cy $ */
2
3/*
2
3/*
4 * Copyright (C) 2003 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * $Id: rwlock_emul.c,v 1.1.4.1 2006/06/16 17:21:17 darrenr Exp $
9 */
4 * Copyright (C) 2012 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * $Id$
9 */
10
11#include "ipf.h"
12
13#define EMM_MAGIC 0x97dd8b3a
14
15void eMrwlock_read_enter(rw, file, line)
10
11#include "ipf.h"
12
13#define EMM_MAGIC 0x97dd8b3a
14
15void eMrwlock_read_enter(rw, file, line)
16eMrwlock_t *rw;
17char *file;
18int line;
16 eMrwlock_t *rw;
17 char *file;
18 int line;
19{
20 if (rw->eMrw_magic != EMM_MAGIC) {
21 fprintf(stderr, "%s:eMrwlock_read_enter(%p): bad magic: %#x\n",
22 rw->eMrw_owner, rw, rw->eMrw_magic);
23 abort();
24 }
25 if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {
26 fprintf(stderr,
27 "%s:eMrwlock_read_enter(%p): already locked: %d/%d\n",
28 rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
29 abort();
30 }
31 rw->eMrw_read++;
32 rw->eMrw_heldin = file;
33 rw->eMrw_heldat = line;
34}
35
36
37void eMrwlock_write_enter(rw, file, line)
19{
20 if (rw->eMrw_magic != EMM_MAGIC) {
21 fprintf(stderr, "%s:eMrwlock_read_enter(%p): bad magic: %#x\n",
22 rw->eMrw_owner, rw, rw->eMrw_magic);
23 abort();
24 }
25 if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {
26 fprintf(stderr,
27 "%s:eMrwlock_read_enter(%p): already locked: %d/%d\n",
28 rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
29 abort();
30 }
31 rw->eMrw_read++;
32 rw->eMrw_heldin = file;
33 rw->eMrw_heldat = line;
34}
35
36
37void eMrwlock_write_enter(rw, file, line)
38eMrwlock_t *rw;
39char *file;
40int line;
38 eMrwlock_t *rw;
39 char *file;
40 int line;
41{
42 if (rw->eMrw_magic != EMM_MAGIC) {
43 fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n",
44 rw->eMrw_owner, rw, rw->eMrw_magic);
45 abort();
46 }
47 if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {
48 fprintf(stderr,
49 "%s:eMrwlock_write_enter(%p): already locked: %d/%d\n",
50 rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
51 abort();
52 }
53 rw->eMrw_write++;
54 rw->eMrw_heldin = file;
55 rw->eMrw_heldat = line;
56}
57
58
59void eMrwlock_downgrade(rw, file, line)
41{
42 if (rw->eMrw_magic != EMM_MAGIC) {
43 fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n",
44 rw->eMrw_owner, rw, rw->eMrw_magic);
45 abort();
46 }
47 if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {
48 fprintf(stderr,
49 "%s:eMrwlock_write_enter(%p): already locked: %d/%d\n",
50 rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);
51 abort();
52 }
53 rw->eMrw_write++;
54 rw->eMrw_heldin = file;
55 rw->eMrw_heldat = line;
56}
57
58
59void eMrwlock_downgrade(rw, file, line)
60eMrwlock_t *rw;
61char *file;
62int line;
60 eMrwlock_t *rw;
61 char *file;
62 int line;
63{
64 if (rw->eMrw_magic != EMM_MAGIC) {
65 fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n",
66 rw->eMrw_owner, rw, rw->eMrw_magic);
67 abort();
68 }
69 if (rw->eMrw_read != 0 || rw->eMrw_write != 1) {
70 fprintf(stderr,

--- 4 unchanged lines hidden (view full) ---

75 rw->eMrw_write--;
76 rw->eMrw_read++;
77 rw->eMrw_heldin = file;
78 rw->eMrw_heldat = line;
79}
80
81
82void eMrwlock_exit(rw)
63{
64 if (rw->eMrw_magic != EMM_MAGIC) {
65 fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n",
66 rw->eMrw_owner, rw, rw->eMrw_magic);
67 abort();
68 }
69 if (rw->eMrw_read != 0 || rw->eMrw_write != 1) {
70 fprintf(stderr,

--- 4 unchanged lines hidden (view full) ---

75 rw->eMrw_write--;
76 rw->eMrw_read++;
77 rw->eMrw_heldin = file;
78 rw->eMrw_heldat = line;
79}
80
81
82void eMrwlock_exit(rw)
83eMrwlock_t *rw;
83 eMrwlock_t *rw;
84{
85 if (rw->eMrw_magic != EMM_MAGIC) {
86 fprintf(stderr, "%s:eMrwlock_exit(%p): bad magic: %#x\n",
87 rw->eMrw_owner, rw, rw->eMrw_magic);
88 abort();
89 }
90 if (rw->eMrw_read != 1 && rw->eMrw_write != 1) {
91 fprintf(stderr, "%s:eMrwlock_exit(%p): not locked: %d/%d\n",

--- 4 unchanged lines hidden (view full) ---

96 rw->eMrw_read--;
97 else if (rw->eMrw_write == 1)
98 rw->eMrw_write--;
99 rw->eMrw_heldin = NULL;
100 rw->eMrw_heldat = 0;
101}
102
103
84{
85 if (rw->eMrw_magic != EMM_MAGIC) {
86 fprintf(stderr, "%s:eMrwlock_exit(%p): bad magic: %#x\n",
87 rw->eMrw_owner, rw, rw->eMrw_magic);
88 abort();
89 }
90 if (rw->eMrw_read != 1 && rw->eMrw_write != 1) {
91 fprintf(stderr, "%s:eMrwlock_exit(%p): not locked: %d/%d\n",

--- 4 unchanged lines hidden (view full) ---

96 rw->eMrw_read--;
97 else if (rw->eMrw_write == 1)
98 rw->eMrw_write--;
99 rw->eMrw_heldin = NULL;
100 rw->eMrw_heldat = 0;
101}
102
103
104static int initcount = 0;
105
104void eMrwlock_init(rw, who)
106void eMrwlock_init(rw, who)
105eMrwlock_t *rw;
106char *who;
107 eMrwlock_t *rw;
108 char *who;
107{
108 if (rw->eMrw_magic == EMM_MAGIC) { /* safe bet ? */
109 fprintf(stderr,
110 "%s:eMrwlock_init(%p): already initialised?: %#x\n",
111 rw->eMrw_owner, rw, rw->eMrw_magic);
112 abort();
113 }
114 rw->eMrw_magic = EMM_MAGIC;
115 rw->eMrw_read = 0;
116 rw->eMrw_write = 0;
117 if (who != NULL)
118 rw->eMrw_owner = strdup(who);
119 else
120 rw->eMrw_owner = NULL;
109{
110 if (rw->eMrw_magic == EMM_MAGIC) { /* safe bet ? */
111 fprintf(stderr,
112 "%s:eMrwlock_init(%p): already initialised?: %#x\n",
113 rw->eMrw_owner, rw, rw->eMrw_magic);
114 abort();
115 }
116 rw->eMrw_magic = EMM_MAGIC;
117 rw->eMrw_read = 0;
118 rw->eMrw_write = 0;
119 if (who != NULL)
120 rw->eMrw_owner = strdup(who);
121 else
122 rw->eMrw_owner = NULL;
123 initcount++;
121}
122
123
124void eMrwlock_destroy(rw)
124}
125
126
127void eMrwlock_destroy(rw)
125eMrwlock_t *rw;
128 eMrwlock_t *rw;
126{
127 if (rw->eMrw_magic != EMM_MAGIC) {
128 fprintf(stderr, "%s:eMrwlock_destroy(%p): bad magic: %#x\n",
129 rw->eMrw_owner, rw, rw->eMrw_magic);
130 abort();
131 }
129{
130 if (rw->eMrw_magic != EMM_MAGIC) {
131 fprintf(stderr, "%s:eMrwlock_destroy(%p): bad magic: %#x\n",
132 rw->eMrw_owner, rw, rw->eMrw_magic);
133 abort();
134 }
135 if (rw->eMrw_owner != NULL)
136 free(rw->eMrw_owner);
132 memset(rw, 0xa5, sizeof(*rw));
137 memset(rw, 0xa5, sizeof(*rw));
138 initcount--;
133}
139}
140
141void ipf_rwlock_clean()
142{
143 if (initcount != 0)
144 abort();
145}