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introduced "sync" helper function for converting a Javascript function

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into a Java-style synchronized method
This commit is contained in:
matthias%sorted.org 2001-01-31 13:05:21 +00:00
parent e5ae12e585
commit f39acf5399
2 changed files with 66 additions and 2 deletions
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34
js/rhino/org/mozilla/javascript/tools/shell/Global.java
View File

@ -57,7 +57,7 @@ public class Global {
// Define some global functions particular to the shell. Note
// that these functions are not part of ECMA.
String[] names = { "print", "quit", "version", "load", "help",
"loadClass", "defineClass", "spawn" };
"loadClass", "defineClass", "spawn", "sync" };
try {
scope.defineFunctionProperties(names, Global.class,
ScriptableObject.DONTENUM);
@ -276,6 +276,38 @@ public class Global {
return thread;
}
/**
* The sync function creates a synchronized function (in the sense
* of a Java synchronized method) from an existing function. The
* new function synchronizes on the <code>this</code> object of
* its invocation.
* js> var o = { f : sync(function(x) {
* print("entry");
* Packages.java.lang.Thread.sleep(x*1000);
* print("exit");
* })};
* js> spawn(function() {o.f(5);});
* Thread[Thread-0,5,main]
* entry
* js> spawn(function() {o.f(5);});
* Thread[Thread-1,5,main]
* js>
* exit
* entry
* exit
*/
public static Object sync(Context cx, Scriptable thisObj, Object[] args,
Function funObj)
{
if (args.length == 1 && args[0] instanceof Function) {
return new Synchronizer((Function)args[0]);
}
else {
throw Context.reportRuntimeError(ToolErrorReporter.getMessage(
"msg.spawn.args"));
}
}
public InputStream getIn() {
return inStream == null ? System.in : inStream;
}

34
js/rhino/toolsrc/org/mozilla/javascript/tools/shell/Global.java
View File

@ -57,7 +57,7 @@ public class Global {
// Define some global functions particular to the shell. Note
// that these functions are not part of ECMA.
String[] names = { "print", "quit", "version", "load", "help",
"loadClass", "defineClass", "spawn" };
"loadClass", "defineClass", "spawn", "sync" };
try {
scope.defineFunctionProperties(names, Global.class,
ScriptableObject.DONTENUM);
@ -276,6 +276,38 @@ public class Global {
return thread;
}
/**
* The sync function creates a synchronized function (in the sense
* of a Java synchronized method) from an existing function. The
* new function synchronizes on the <code>this</code> object of
* its invocation.
* js> var o = { f : sync(function(x) {
* print("entry");
* Packages.java.lang.Thread.sleep(x*1000);
* print("exit");
* })};
* js> spawn(function() {o.f(5);});
* Thread[Thread-0,5,main]
* entry
* js> spawn(function() {o.f(5);});
* Thread[Thread-1,5,main]
* js>
* exit
* entry
* exit
*/
public static Object sync(Context cx, Scriptable thisObj, Object[] args,
Function funObj)
{
if (args.length == 1 && args[0] instanceof Function) {
return new Synchronizer((Function)args[0]);
}
else {
throw Context.reportRuntimeError(ToolErrorReporter.getMessage(
"msg.spawn.args"));
}
}
public InputStream getIn() {
return inStream == null ? System.in : inStream;
}