| /* |
| * This file is part of the Jikes RVM project (http://jikesrvm.org). |
| * |
| * This file is licensed to You under the Common Public License (CPL); |
| * You may not use this file except in compliance with the License. You |
| * may obtain a copy of the License at |
| * |
| * http://www.opensource.org/licenses/cpl1.0.php |
| * |
| * See the COPYRIGHT.txt file distributed with this work for information |
| * regarding copyright ownership. |
| */ |
| package org.vmmagic.pragma; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.Target; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.ElementType; |
| import org.vmmagic.Pragma; |
| |
| /** |
| * A pragma that can be used to declare that a particular method is logically |
| * uninterruptible even though it contains bytecodes that are actually |
| * interruptible. |
| * |
| * The effect of this pragma is to suppress warning messages about violations of |
| * uninterruptiblity when compiling a method that throws this exception. There |
| * are two cases in which using the pragma is justified. |
| * <ul> |
| * <li> Uninterruptibility is ensured via some other mechanism. For example, the |
| * method explicitly disables threadswitching around the interruptible regions |
| * (VM.sysWrite on String). Or the interruptible regions are not reachable when |
| * the VM is running (various VM.sysWrite that check VM.runningVM). |
| * <li> The interruptible regions represent an 'error' condition that will never |
| * be executed unless the VM is already in the process of reporting an error, |
| * for example RuntimeEntrypoints.raiseClassCastException. |
| * <ul> |
| * Extreme care must be exercised when using this pragma since it suppresses the |
| * checking of uninterruptibility. |
| * <p> |
| * Use of this pragma is being phased out since it lumps together two possible |
| * special cases. Use either {@link Unpreemptible} or |
| * {@link UninterruptibleNoWarn} instead. |
| * {@link <a href="http://jira.codehaus.org/browse/RVM-115">RVM-115</a>} for more |
| * context. |
| * @deprecated |
| */ |
| @Retention(RetentionPolicy.RUNTIME) |
| @Target(ElementType.METHOD) |
| @Pragma |
| public @interface LogicallyUninterruptible { } |