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/*******************************************************************************
* Copyright (c) 2009 Clark N. Hobbie
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Clark N. Hobbie - initial API and implementation
*******************************************************************************/
package org.eclipse.ecf.ipc.semaphore;
/**
* <P>
* An internal class that contains the results from a native system call.
* </P>
* <P>
* Calls to the underlying operation system will often have sever pieces of information
* instead of just success and failure. This class allows clients to get back all the
* information at once.
* </P>
* <P>
* The RESULT_ constants are defined to make life easier for the JNI: accessing enum tags
* in JNI is somewhat difficult.
* </P>
*
* @author Clark N. Hobbie
*/
public class SemaphoreResult
{
public static final int RESULT_SUCCESS = 0;
public static final int RESULT_INSUFFICIENT_PERMISSIONS = 1;
public static final int RESULT_DOES_NOT_EXIST = 2;
public static final int RESULT_UNKNOWN_ERROR = 3;
public static final int RESULT_TIMEOUT = 4;
public static final int RESULT_UNKNOWN_HANDLE = 5;
public static final String MSG_INSUFFICIENT_PERMISSIONS = "Insufficient permissions to access the semaphore";
public static final String MSG_SUCCESS = "success";
public static final String MSG_DOES_NOT_EXIST = "The semaphore does not exist";
public static final String MSG_UNKNOWN_ERROR = "An unknown error occurred while trying to access the semaphore";
public static final String MSG_TIMEOUT = "The specified period of timeout elapsed before the semaphore became available";
public static final String MSG_UNKNOWN_HANDLE = "The specified handle was not recognized as a semaphore handle by the OS";
public enum Results
{
Success(RESULT_SUCCESS, MSG_SUCCESS),
InsufficientPermissions(RESULT_INSUFFICIENT_PERMISSIONS, MSG_INSUFFICIENT_PERMISSIONS),
DoesNotExist(RESULT_DOES_NOT_EXIST, MSG_DOES_NOT_EXIST),
UnknownError(RESULT_UNKNOWN_ERROR, MSG_UNKNOWN_ERROR),
Timeout(RESULT_TIMEOUT, MSG_TIMEOUT),
UnknownHandle(RESULT_UNKNOWN_HANDLE, MSG_UNKNOWN_HANDLE);
public String message;
public int code;
private Results(int resultCode, String theMessage)
{
code = resultCode;
message = theMessage;
}
public static Results toResult(int code)
{
Results result = UnknownError;
for (Results r : values())
{
if (code == r.code)
{
result = r;
break;
}
}
return result;
}
public static int foo()
{
return -1;
}
}
public void convertResultCode()
{
result = Results.toResult(resultCode);
}
public int resultCode;
public Results result;
public int errorCode;
public long handle;
}
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