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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package sun.io;

Used to set the Windows error mode at VM initialization time.

The error mode decides whether the system will handle specific types of serious errors
or whether the process will handle them.
Since:
1.6/**
 * Used to set the Windows error mode at VM initialization time.
 * <p>
 * The error mode decides whether the system will handle specific types of serious errors
 * or whether the process will handle them.
 *
 * @since 1.6
 */
public class Win32ErrorMode {

    // The system does not display the critical-error-handler message box. Instead,
    // the system sends the error to the calling process.
    private static final long SEM_FAILCRITICALERRORS     = 0x0001;

    // The system does not display the general-protection-fault message box. This flag should
    // only be set by debugging applications that handle general protection (GP) faults themselves
    // with an exception handler.
    private static final long SEM_NOGPFAULTERRORBOX      = 0x0002;

    // The system automatically fixes memory alignment faults and makes them invisible
    // to the application. It does this for the calling process and any descendant processes.
    private static final long SEM_NOALIGNMENTFAULTEXCEPT = 0x0004;

    // The system does not display a message box when it fails to find a file. Instead,
    // the error is returned to the calling process.
    private static final long SEM_NOOPENFILEERRORBOX     = 0x8000;

    private Win32ErrorMode() {
    }

    
Invoke at VM initialization time to disable the critical error message box.
 The critial error message box is disabled unless the system property sun.io.allowCriticalErrorMessageBox is set to something other than false. This includes the empty string. 

This method does nothing if invoked after VM and class library initialization
has completed.
/**
     * Invoke at VM initialization time to disable the critical error message box.
     * <p>
     * The critial error message box is disabled unless the system property
     * {@code sun.io.allowCriticalErrorMessageBox} is set to something other than
     * {@code false}. This includes the empty string.
     * <p>
     * This method does nothing if invoked after VM and class library initialization
     * has completed.
     */
    public static void initialize() {
        if (!jdk.internal.misc.VM.isBooted()) {
            String s = System.getProperty("sun.io.allowCriticalErrorMessageBox");
            if (s == null || s.equals(Boolean.FALSE.toString())) {
                long mode = setErrorMode(0);
                mode |= SEM_FAILCRITICALERRORS;
                setErrorMode(mode);
            }
        }
    }

    // Win32 SetErrorMode
    private static native long setErrorMode(long mode);
}