/*
 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

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
     * <tt>sun.io.allowCriticalErrorMessageBox</tt> is set to something other than
     * <code>false</code>. 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 (!sun.misc.VM.isBooted()) {
            String s = (String) 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);
}