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package ij.plugin;
import ij.*;
import ij.gui.*;
import java.io.*;
import ij.util.Tools;
/** This plugin implements the Edit/Options/Memory command. */
public class Memory implements PlugIn {
String s;
int index1, index2;
File f;
boolean fileMissing;
boolean sixtyFourBit;
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);
String title = "Memory "+(IJ.is64Bit()?"(64-bit)":"(32-bit)");
GenericDialog gd = new GenericDialog(title);
gd.addNumericField("Maximum memory:", max, 0, 5, "MB");
gd.addNumericField("Parallel threads:", Prefs.getThreads(), 0, 5, "");
gd.setInsets(12, 0, 0);
gd.addCheckbox("Keep multiple undo buffers", Prefs.keepUndoBuffers);
gd.setInsets(12, 0, 0);
gd.addCheckbox("Run garbage collector on status bar click", !Prefs.noClickToGC);
gd.addHelp(IJ.URL+"/docs/menus/edit.html#memory");
gd.showDialog();
if (gd.wasCanceled()) return;
int max2 = (int)gd.getNextNumber();
Prefs.setThreads((int)gd.getNextNumber());
Prefs.keepUndoBuffers = gd.getNextBoolean();
Prefs.noClickToGC = !gd.getNextBoolean();
if (gd.invalidNumber()) {
IJ.showMessage("Memory", "The number entered was invalid.");
return;
}
if (unableToSet && max2!=max)
{showError(); return;}
if (IJ.isMacOSX() && max2<256)
max2 = 256;
else if (max2<32)
max2 = 32;
if (max2==max) return;
int limit = IJ.isWindows()?1600:1700;
String OSXInfo = "";
if (max2>=limit && !IJ.is64Bit()) {
if (!IJ.showMessageWithCancel(title,
"Note: setting the memory limit to a value\n"
+"greater than "+limit+"MB on a 32-bit system\n"
+"may cause ImageJ to fail to start. The title of\n"
+"the Edit>Options>Memory & Threads dialog\n"
+"box changes to \"Memory (64-bit)\" when ImageJ\n"
+"is running on a 64-bit version of Java."));
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 + "\"";
IJ.showMessage("Memory", msg);
return;
}
String hint = "";
if (IJ.isWindows() && max2>640 && max2>max)
hint = "\nDelete the \"ImageJ.cfg\" file, located in the ImageJ folder,\nif ImageJ fails to start.";
IJ.showMessage("Memory", "The new " + max2 +"MB limit will take effect after ImageJ is restarted."+hint);
}
public long getMemorySetting() {
if (IJ.getApplet()!=null) return 0L;
long max = 0L;
if (IJ.isMacOSX()) {
String appPath = System.getProperty("java.class.path");
if (appPath==null) return 0L;
int index = appPath.indexOf(".app/");
if (index==-1) return 0L;
appPath = appPath.substring(0,index+5);
max = getMemorySetting(appPath+"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 at\n \n"
+ " "+IJ.URL+"/docs/install/\n"
+ " \n";
if (fileMissing) {
if (IJ.isMacOSX())
msg += "The ImageJ application (ImageJ.app) was not found.\n \n";
else if (IJ.isWindows())
msg += "ImageJ.cfg not found.\n \n";
fileMissing = false;
}
if (max>0)
msg += "Current limit: " + max + "MB";
IJ.showMessage("Memory", msg);
}
long getMemorySetting(String file) {
String path = file.startsWith("/")?file:Prefs.getImageJDir()+file;
if (IJ.debugMode) IJ.log("getMemorySetting: "+path);
f = new File(path);
if (!f.exists()) {
fileMissing = true;
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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