From 84adefa331c4159d432d22840663c38f155cd4c1 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Fri, 20 Nov 2009 14:54:40 +0000
Subject: The R13B03 release.

---
 .../java_src/com/ericsson/otp/erlang/Links.java    | 123 +++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 lib/jinterface/java_src/com/ericsson/otp/erlang/Links.java

(limited to 'lib/jinterface/java_src/com/ericsson/otp/erlang/Links.java')

diff --git a/lib/jinterface/java_src/com/ericsson/otp/erlang/Links.java b/lib/jinterface/java_src/com/ericsson/otp/erlang/Links.java
new file mode 100644
index 0000000000..0bb4a708a3
--- /dev/null
+++ b/lib/jinterface/java_src/com/ericsson/otp/erlang/Links.java
@@ -0,0 +1,123 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 2000-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights 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;
+    }
+}
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