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package ij.plugin;
import ij.*;
//import ij.process.*;
import ij.gui.*;
//import java.awt.*;
import java.io.*;
import ij.util.Tools;
import java.lang.reflect.*;
/** This plugin implements the Edit/Options/Memory command. */
public class Memory implements PlugIn {
String s;
int index1, index2;
File f;
public void run(String arg) {
changeMemoryAllocation();
//IJ.log("setting="+getMemorySetting()/(1024*1024)+"MB");
//IJ.log("maxMemory="+maxMemory()/(1024*1024)+"MB");
}
void changeMemoryAllocation() {
IJ.maxMemory(); // forces IJ to cache old limit
int max = (int)(getMemorySetting()/1048576L);
boolean unableToSet = max==0;
if (max==0) max = (int)(maxMemory()/1048576L);
GenericDialog gd = new GenericDialog("Memory");
gd.addNumericField("Maximum Memory: ", max, 0, 4, "MB");
gd.addNumericField("Parallel Threads for Stacks", Prefs.getThreads(), 0);
gd.showDialog();
if (gd.wasCanceled()) return;
int max2 = (int)gd.getNextNumber();
Prefs.setThreads((int)gd.getNextNumber());
if (gd.invalidNumber()) {
IJ.showMessage("Memory", "The number entered was invalid.");
return;
}
if (unableToSet && max2!=max)
{showError(); return;}
if (max2<32 && IJ.isMacOSX()) max2 = 32;
if (max2<8 && IJ.isWindows()) max2 = 8;
if (max2==max) return;
if (max2>=1700) {
if (!IJ.showMessageWithCancel("Memory",
"Note: setting the memory limit to a value\n"
+"greater than 1700MB on a 32-bit system\n"
+"may cause ImageJ to fail to start."))
return;
}
try {
String s2 = s.substring(index2);
if (s2.startsWith("g"))
s2 = "m"+s2.substring(1);
String s3 = s.substring(0, index1) + max2 + s2;
FileOutputStream fos = new FileOutputStream(f);
PrintWriter pw = new PrintWriter(fos);
pw.print(s3);
pw.close();
} catch (IOException e) {
String error = e.getMessage();
if (error==null || error.equals("")) error = ""+e;
String name = IJ.isMacOSX()?"Info.plist":"ImageJ.cfg";
String msg =
"Unable to update the file \"" + name + "\".\n"
+ " \n"
+ "\"" + error + "\"\n";
IJ.showMessage("Memory", msg);
return;
}
IJ.showMessage("Memory", "The new " + max2 +"MB limit will take effect after ImageJ is restarted.");
}
public long getMemorySetting() {
if (IJ.getApplet()!=null) return 0L;
long max = 0L;
if (IJ.isMacOSX()) {
max = getMemorySetting("ImageJ.app/Contents/Info.plist");
} else
max = getMemorySetting("ImageJ.cfg");
return max;
}
void showError() {
int max = (int)(maxMemory()/1048576L);
String msg =
"ImageJ is unable to change the memory limit. For \n"
+ "more information, refer to the installation notes. \n"
+ " \n";
if (max>0)
msg += "Current limit: " + max + "MB";
IJ.showMessage("Memory", msg);
}
long getMemorySetting(String file) {
String path = Prefs.getHomeDir()+File.separator+file;
f = new File(path);
if (!f.exists()) return 0L;
long max = 0L;
try {
int size = (int)f.length();
byte[] buffer = new byte[size];
FileInputStream in = new FileInputStream(f);
in.read(buffer, 0, size);
s = new String(buffer, 0, size, "ISO8859_1");
in.close();
index1 = s.indexOf("-mx");
if (index1==-1) index1 = s.indexOf("-Xmx");
if (index1==-1) return 0L;
if (s.charAt(index1+1)=='X') index1+=4; else index1+=3;
index2 = index1;
while (index2<s.length()-1 && Character.isDigit(s.charAt(++index2))) {}
String s2 = s.substring(index1, index2);
max = (long)Tools.parseDouble(s2, 0.0)*1024*1024;
if (index2<s.length() && s.charAt(index2)=='g')
max = max*1024L;
}
catch (Exception e) {
IJ.log(""+e);
return 0L;
}
return max;
}
/** Returns the maximum amount of memory this JVM will attempt to use. */
public long maxMemory() {
return Runtime.getRuntime().maxMemory();
}
}
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