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/*******************************************************************************
* Copyright (c) 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.tools.internal;
import java.io.PrintStream;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Hashtable;
/**
* Instructions on how to use the NativeStats tool with a standlaone SWT example:
*
* 1) Compile the SWT native libraries defining the NATIVE_STATS flag (i.e. uncomment line in makefile).
* 2) Add the following code around the sections of interest to dump the
* native calls done in that section.
*
* NativeStats stats = new NativeStats();
* ...
* <code section>
* ...
* stats.dumpDiff(System.out);
*
* 3) Or add the following code at a given point to dump a snapshot of
* the native calls done until that point.
*
* new NativeStats().dumpSnapshot(System.out);
*/
public class NativeStats {
Hashtable snapshot;
final static String[] classes = new String[]{"OS", "ATK", "CDE", "GNOME", "GTK", "XPCOM", "COM"};
public static class NativeFunction implements Comparable {
String name;
int callCount;
public NativeFunction(String name, int callCount) {
this.name = name;
this.callCount = callCount;
}
void subtract(NativeFunction func) {
this.callCount -= func.callCount;
}
public int getCallCount() {
return callCount;
}
public String getName() {
return name;
}
public int compareTo(Object func) {
return ((NativeFunction)func).callCount - callCount;
}
}
public NativeStats() {
snapshot = snapshot();
}
public Hashtable diff() {
Hashtable newSnapshot = snapshot();
Enumeration keys = newSnapshot.keys();
while (keys.hasMoreElements()) {
String className = (String)keys.nextElement();
NativeFunction[] newFuncs = (NativeFunction[])newSnapshot.get(className);
NativeFunction[] funcs = (NativeFunction[])snapshot.get(className);
if (funcs != null) {
for (int i = 0; i < newFuncs.length; i++) {
newFuncs[i].subtract(funcs[i]);
}
}
}
return newSnapshot;
}
public void dumpDiff(PrintStream ps) {
dump(diff(), ps);
}
public void dumpSnapshot(PrintStream ps) {
dump(snapshot(), ps);
}
public void dumpSnapshot(String className, PrintStream ps) {
Hashtable snapshot = new Hashtable();
snapshot(className, snapshot);
dump(className, (NativeFunction[])snapshot.get(className), ps);
}
public void dump(Hashtable snapshot, PrintStream ps) {
Enumeration keys = snapshot.keys();
while (keys.hasMoreElements()) {
String className = (String)keys.nextElement();
dump(className, (NativeFunction[])snapshot.get(className), ps);
}
}
void dump(String className, NativeFunction[] funcs, PrintStream ps) {
if (funcs == null) return;
Arrays.sort(funcs);
int total = 0;
for (int i = 0; i < funcs.length; i++) {
NativeFunction func = funcs[i];
total += func.getCallCount();
}
ps.print(className);
ps.print("=");
ps.print(total);
ps.println();
for (int i = 0; i < funcs.length; i++) {
NativeFunction func = funcs[i];
if (func.getCallCount() > 0) {
ps.print("\t");
ps.print(func.getName());
ps.print("=");
ps.print(func.getCallCount());
ps.println();
}
}
}
public void reset() {
snapshot = snapshot();
}
public Hashtable snapshot() {
Hashtable snapshot = new Hashtable();
for (int i = 0; i < classes.length; i++) {
String className = classes[i];
snapshot(className, snapshot);
}
return snapshot;
}
public Hashtable snapshot(String className, Hashtable snapshot) {
try {
Class clazz = getClass();
Method functionCount = clazz.getMethod(className + "_GetFunctionCount", new Class[0]);
Method functionCallCount = clazz.getMethod(className + "_GetFunctionCallCount", new Class[]{int.class});
Method functionName = clazz.getMethod(className + "_GetFunctionName", new Class[]{int.class});
int count = ((Integer)functionCount.invoke(clazz, new Object[0])).intValue();
NativeFunction[] funcs = new NativeFunction[count];
Object[] index = new Object[1];
for (int i = 0; i < count; i++) {
index[0] = new Integer(i);
int callCount = ((Integer)functionCallCount.invoke(clazz, index)).intValue();
String name = (String)functionName.invoke(clazz, index);
funcs[i] = new NativeFunction(name, callCount);
}
snapshot.put(className, funcs);
} catch (Throwable e) {
// e.printStackTrace(System.out);
}
return snapshot;
}
public static final native int OS_GetFunctionCount();
public static final native String OS_GetFunctionName(int index);
public static final native int OS_GetFunctionCallCount(int index);
public static final native int ATK_GetFunctionCount();
public static final native String ATK_GetFunctionName(int index);
public static final native int ATK_GetFunctionCallCount(int index);
public static final native int CDE_GetFunctionCount();
public static final native String CDE_GetFunctionName(int index);
public static final native int CDE_GetFunctionCallCount(int index);
public static final native int GNOME_GetFunctionCount();
public static final native String GNOME_GetFunctionName(int index);
public static final native int GNOME_GetFunctionCallCount(int index);
public static final native int GTK_GetFunctionCount();
public static final native String GTK_GetFunctionName(int index);
public static final native int GTK_GetFunctionCallCount(int index);
public static final native int XPCOM_GetFunctionCount();
public static final native String XPCOM_GetFunctionName(int index);
public static final native int XPCOM_GetFunctionCallCount(int index);
public static final native int COM_GetFunctionCount();
public static final native String COM_GetFunctionName(int index);
public static final native int COM_GetFunctionCallCount(int index);
}
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