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
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2000-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
package com.ericsson.otp.erlang;
// package scope
class Links {
Link[] links;
int count;
Links() {
this(10);
}
Links(final int initialSize) {
links = new Link[initialSize];
count = 0;
}
synchronized void addLink(final OtpErlangPid local,
final OtpErlangPid remote) {
if (find(local, remote) == -1) {
if (count >= links.length) {
final Link[] tmp = new Link[count * 2];
System.arraycopy(links, 0, tmp, 0, count);
links = tmp;
}
links[count++] = new Link(local, remote);
}
}
synchronized void removeLink(final OtpErlangPid local,
final OtpErlangPid remote) {
int i;
if ((i = find(local, remote)) != -1) {
count--;
links[i] = links[count];
links[count] = null;
}
}
synchronized boolean exists(final OtpErlangPid local,
final OtpErlangPid remote) {
return find(local, remote) != -1;
}
synchronized int find(final OtpErlangPid local, final OtpErlangPid remote) {
for (int i = 0; i < count; i++) {
if (links[i].equals(local, remote)) {
return i;
}
}
return -1;
}
int count() {
return count;
}
/* all local pids get notified about broken connection */
synchronized OtpErlangPid[] localPids() {
OtpErlangPid[] ret = null;
if (count != 0) {
ret = new OtpErlangPid[count];
for (int i = 0; i < count; i++) {
ret[i] = links[i].local();
}
}
return ret;
}
/* all remote pids get notified about failed pid */
synchronized OtpErlangPid[] remotePids() {
OtpErlangPid[] ret = null;
if (count != 0) {
ret = new OtpErlangPid[count];
for (int i = 0; i < count; i++) {
ret[i] = links[i].remote();
}
}
return ret;
}
/* clears the link table, returns a copy */
synchronized Link[] clearLinks() {
Link[] ret = null;
if (count != 0) {
ret = new Link[count];
for (int i = 0; i < count; i++) {
ret[i] = links[i];
links[i] = null;
}
count = 0;
}
return ret;
}
/* returns a copy of the link table */
synchronized Link[] links() {
Link[] ret = null;
if (count != 0) {
ret = new Link[count];
System.arraycopy(links, 0, ret, 0, count);
}
return ret;
}
}
|
